Blockage detection method and device and radioactive component processing method and system

Abstract

The invention discloses a blockage detection method and device and a radioactive component processing method and system, and relates to the technical field of nuclear industry. The detection method is applied to the blockage detection device, the blockage detection device comprises a first ionization chamber detector arranged at the top of a feeding chute and a second ionization chamber detector arranged at the bottom of the feeding chute, and the detection method comprises the following steps: acquiring a first signal sequence collected by the first ionization chamber detector, the first signal sequence is acquired by the first ionization chamber detector, the second signal sequence is acquired by the second ionization chamber detector, the first signal sequence comprises a plurality of first signal values and a plurality of first time values in one-to-one correspondence with the plurality of first signal values, and the second signal sequence comprises a plurality of second signal values and a plurality of second time values in one-to-one correspondence with the plurality of second signal values; and whether the feeding chute is blocked or not is determined according to the first signal sequence and the second signal sequence. According to the embodiment of the invention, the method can improve the accuracy of the blockage detection of the feeding chute.

Description

Technical Field

[0001] This application belongs to the technical field of nuclear industry, and particularly relates to a blockage detection method and device, and a radioactive component processing method and system. Background Art

[0002] During the processing of radioactive components such as spent fuel in nuclear energy facilities, the radioactive components need to be cut into short fuel segments and transported to a dissolver through a feed chute for dissolution. Since the short fuel segments have strong γ radioactivity and the background radiation level is extremely high during the processing, traditional blockage detection methods are difficult to effectively apply.

[0003] In the prior art, although there is a method of using a γ detector to monitor the flow state of radioactive substances, in a high-background environment, the response speed and measurement range of conventional detectors are difficult to meet the requirements, and they are easily interfered by background radiation, resulting in inaccurate detection results of the feed chute. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a blockage detection method and device, and a radioactive component processing method and system in view of the above deficiencies in the prior art. Using this blockage detection method can improve the accuracy of blockage detection of the feed chute.

[0005] In a first aspect, an embodiment of this application provides a blockage detection method, which is applied to a blockage detection device. The blockage detection device includes a first ionization chamber detector disposed at the top of the feed chute and a second ionization chamber detector disposed at the bottom of the feed chute;

[0006] The method includes:

[0007] Obtain a first signal sequence collected by the first ionization chamber detector and a second signal sequence collected by the second ionization chamber detector. The first signal sequence includes a plurality of first signal values and a plurality of first time values corresponding one by one to the plurality of first signal values. The second signal sequence includes a plurality of second signal values and a plurality of second time values corresponding one by one to the plurality of second signal values;

[0008] Determine whether the feed chute is blocked according to the first signal sequence and the second signal sequence.

[0009] In some embodiments of the first aspect, determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence includes:

[0010] When at least two first signal values are not within a preset range and all second signal values are within the preset range, determine that the feed chute is blocked and determine that the blockage position is between the first ionization chamber detector and the second ionization chamber detector;

[0011] Alternatively, when all the first signal values are within a preset range and all the second signal values are within a preset range, it is determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the transmission starting point of the fuel short section.

[0012] In some embodiments of the first aspect, determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence includes:

[0013] When at least two first signal values are not within the preset range and at least two second signal values are not within the preset range, according to the first signal sequence and the second signal sequence, a target characteristic parameter is determined, and the target characteristic parameter includes at least one of a target time difference and a target integral difference;

[0014] Whether the feed chute is blocked is determined according to the target characteristic parameter.

[0015] In some embodiments of the first aspect, when the target characteristic parameter includes a target time difference, determining the target characteristic parameter according to the first signal sequence and the second signal sequence includes:

[0016] Determining a first target time value from all the first time values;

[0017] Among all the second time values, the second time value corresponding to the first target time value is used as the second target time value;

[0018] The difference between the second target time value and the first target time value is determined as the target time difference.

[0019] In some embodiments of the first aspect, when the target characteristic parameter includes a target integral difference, determining the target characteristic parameter according to the first signal sequence and the second signal sequence includes:

[0020] Determining a first integral value corresponding to the first signal sequence according to all the first signal values and all the first time values;

[0021] Determining a second integral value corresponding to the second signal sequence according to all the second signal values and all the second time values;

[0022] The difference between the first integral value and the second integral value is determined as the target integral difference.

[0023] In some embodiments of the first aspect, when the target characteristic parameter includes a target time difference, determining whether the feed chute is blocked according to the target characteristic parameter includes:

[0024] When the target time difference is less than or equal to a preset time difference, it is determined that the feed chute is not blocked;

[0025] Or,

[0026] When the target time difference is greater than the preset time difference, it is determined that the feed chute is blocked.

[0027] In some embodiments of the first aspect, the process of obtaining the preset time difference includes:

[0028] Obtain the first distance h1, the second distance h2, and the acceleration due to gravity g, where the first distance h1 is the vertical distance from the transmission starting point of the fuel short section to the central position of the first ionization chamber detector, and the second distance h2 is the vertical distance from the transmission starting point of the fuel short section to the central position of the second ionization chamber detector;

[0029] Substitute the first distance h1, the second distance h2, and the acceleration due to gravity g into formula (1) to calculate the preset time difference Δt;

[0030] Formula (1) includes:

[0031]

[0032] In some embodiments of the first aspect, when the target characteristic parameter includes the target integral difference, determining whether the feed chute is blocked according to the target characteristic parameter includes:

[0033] When the target integral difference is less than or equal to the preset integral difference, it is determined that the feed chute is not blocked;

[0034] Or,

[0035] When the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked.

[0036] In some embodiments of the first aspect, when the target characteristic parameter includes the target time difference and the target integral difference, determining whether the feed chute is blocked according to the target characteristic parameter includes:

[0037] When the target time difference is greater than the preset time difference and the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked;

[0038] Or,

[0039] When the preset condition is satisfied, it is determined that the feed chute is not blocked;

[0040] Wherein, the preset condition includes any one of the following:

[0041] The target time difference is greater than the preset time difference and the target integral difference is less than or equal to the preset integral difference;

[0042] The target time difference is less than the preset time difference and the target integral difference is less than or equal to the preset integral difference;

[0043] The target time difference is less than the preset time difference, and the target integral difference is greater than or equal to the preset integral difference.

[0044] In some embodiments of the first aspect, before determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence, the method further includes:

[0045] Perform a first preprocessing on all the first signal values to obtain a plurality of third signal values, so as to obtain a third signal sequence, wherein the first preprocessing is used to remove noise and interference in all the first signal values, the third signal sequence includes a plurality of third signal values, and a plurality of first time values corresponding to the plurality of third signal values one by one;

[0046] Perform a second preprocessing on all the second signal values to obtain a plurality of fourth signal values, so as to obtain a fourth signal sequence, wherein the second preprocessing is used to remove noise and interference in all the second signal values, the fourth signal sequence includes a plurality of fourth signal values, and a plurality of second time values corresponding to the plurality of fourth signal values one by one;

[0047] Update the first signal sequence to the third signal sequence, and update the second signal sequence to the fourth signal sequence.

[0048] Based on the same inventive concept, in a second aspect, an embodiment of the present application further provides a method for processing radioactive components, which is applied to a radioactive component processing system. The feed radioactive component processing system includes a blockage detection device, and the blockage detection device includes a first ionization chamber detector arranged at the top of the feed chute and a second ionization chamber detector arranged at the bottom of the feed chute;

[0049] Cut the radioactive components into a plurality of fuel short segments;

[0050] Let the plurality of fuel short segments enter the dissolver through the feed chute. When the plurality of fuel short segments pass through the feed chute, determine whether the feed chute is blocked according to the blockage detection method of any item in the first aspect;

[0051] When the feed chute is blocked, output an alarm message, and the alarm message is used to indicate that the feed chute is blocked;

[0052] Or,

[0053] When the feed chute is not blocked, dissolve the plurality of fuel short segments.

[0054] Based on the same inventive concept, in a third aspect, an embodiment of the present application further provides a blockage detection device, including:

[0055] The first ionization chamber detector is arranged at the top of the feed chute and is used to collect the first signal sequence. The first signal sequence includes a plurality of first signal values and a plurality of first time values corresponding to the plurality of first signal values one by one;

[0056] The second ionization chamber detector is arranged at the bottom of the feed chute and is used to collect the second signal sequence. The second signal sequence includes a plurality of second signal values and a plurality of second time values corresponding to the plurality of second signal values one by one;

[0057] The determination module is respectively connected to the first ionization chamber detector and the second ionization chamber detector and is used to determine whether the feed chute is blocked according to the first signal sequence and the second signal sequence.

[0058] In some embodiments of the third aspect, the device further includes:

[0059] The first collimation and shielding module. The first ionization chamber detector is loaded in the first collimation and shielding module, and the first collimation and shielding module is provided with a first collimation hole which is arranged close to the detection surface of the first ionization chamber detector;

[0060] The second collimation and shielding module. The second ionization chamber detector is loaded in the second collimation and shielding module, and the second collimation and shielding module is provided with a second collimation hole which is arranged close to the detection surface of the second ionization chamber detector.

[0061] In some embodiments of the third aspect, both the first ionization chamber detector and the second ionization chamber detector are transient response ionization chamber detectors.

[0062] In the fourth aspect, the embodiment of the present application further provides a radioactive component processing system, including:

[0063] A shearer for cutting the radioactive component into a plurality of fuel short segments;

[0064] A dissolver for dissolving the plurality of fuel short segments;

[0065] The blockage detection device according to any one of the third aspect is connected between the shearer and the dissolver and is used to determine whether the feed chute is blocked when the plurality of fuel short segments pass through the feed chute; and output an alarm message when it is determined that the feed chute is blocked. The alarm message is used to indicate that the feed chute is blocked; and, when it is determined that the feed chute is not blocked, enable the plurality of fuel short segments to enter the dissolver to dissolve the plurality of fuel short segments.

[0066] According to the plugging detection method and device, radioactive component processing method and system provided by the embodiments of the present application, ionization chamber detectors are respectively arranged at the top and bottom of the feeding chute. Compared with conventional detectors, the ionization chamber detectors have a wide measurement range and can adapt to the detection requirements in a high-radioactivity background environment. Furthermore, they can comprehensively capture the movement state of the fuel short rod in the feeding chute, obtain the first signal sequence and the second signal sequence, and then determine whether the feeding chute is plugged according to the first signal sequence and the second signal sequence. Thus, without changing the original structure of the ionization chamber detector, the accuracy of plugging detection of the feeding chute can be improved, so as to timely detect the plugging of the feeding chute, and then timely handle the plugging problem of the feeding chute to improve the efficiency of radioactive component processing. Description of the Drawings

[0067] Figure 1 Fig. shows a flowchart of a plugging detection method provided by an embodiment of the present application;

[0068] Figure 2 Fig. shows a schematic diagram of the correspondence between time and signal values provided by an embodiment of the present application;

[0069] Figure 3 Fig. shows another schematic diagram of the correspondence between time and signal values provided by an embodiment of the present application;

[0070] Figure 4 Fig. shows still another schematic diagram of the correspondence between time and signal values provided by an embodiment of the present application;

[0071] Figure 5 Fig. shows a schematic diagram of the calculation principle of a preset time difference provided by an embodiment of the present application;

[0072] Figure 6 Fig. shows a schematic layout diagram of a first ionization chamber detector and a second ionization chamber detector provided by an embodiment of the present application;

[0073] Figure 7 Fig. shows a schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0074] Figure 8 Fig. shows a timing schematic diagram of an electronic device provided by an embodiment of the present application. Detailed Embodiments

[0075] To enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and embodiments.

[0076] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only provided to provide a better understanding of the present application by showing examples of the present application.

[0077] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0078] It should be understood that the term "and / or" used herein is only a kind of association relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0079] Embodiment 1

[0080] The blockage detection method provided by the embodiment of the present application can be used in the process of transporting fuel short segments to a dissolver for dissolution through a feed chute after the radioactive components are cut into fuel short segments by a shearing machine.

[0081] This blockage detection method can be applied to a blockage detection device, which includes a first ionization chamber detector arranged at the top of the feed chute and a second ionization chamber detector arranged at the bottom of the feed chute.

[0082] Exemplarily, an ionization chamber detector is an instrument for detecting and measuring ionizing radiation, such as alpha particles, beta particles, gamma rays, and neutrons.

[0083] Exemplarily, both the first ionization chamber detector and the second ionization chamber detector can be transient response ionization detectors. The transient response ionization detector has a response speed in the millisecond range, capable of quickly capturing signal changes when a short fuel segment passes by, and thus can further improve the accuracy of detecting blockages in the feed chute. More specifically, two transient response ionization detectors can be used to collect γ-ray signals generated when a short fuel segment passes through the feed chute in real time. The transient response ionization detector has characteristics of a wide measurement range (0.5 mGy / h to 500 Gy / h) and fast response (≤10 ms), and can accurately capture the instantaneous changes when a short fuel segment passes through the chute.

[0084] Exemplarily, the transient response ionization chamber detector can adopt a coaxial high-low range composite design to extend the measurement range to 5 to 6 orders of magnitude, meeting the measurement requirements in high dose rate and high radiation environments. The housing and key components of the transient response ionization chamber detector are made of stainless steel and special materials that are resistant to high temperatures and radiation, ensuring the long-term stable operation of the device in high background environments.

[0085] This blockage detection method can be executed by a blockage detection device, an electronic device, etc. Hereinafter, an example will be given where this blockage detection method is executed by an electronic device.

[0086] As Figure 1 shown, the blockage detection method provided by the embodiment of the present application may include steps S110 to S120.

[0087] S110. Obtain a first signal sequence collected by the first ionization chamber detector and a second signal sequence collected by the second ionization chamber detector. The first signal sequence includes a plurality of first signal values and a plurality of first time values corresponding one-to-one to the plurality of first signal values. The second signal sequence includes a plurality of second signal values and a plurality of second time values corresponding one-to-one to the plurality of second signal values.

[0088] S120. Determine whether the feed chute is blocked according to the first signal sequence and the second signal sequence.

[0089] According to the blockage detection method provided by the embodiment of the present application, ionization chamber detectors are respectively arranged at the top and bottom of the feed chute. Compared with conventional detectors, the ionization chamber detector has a wide measurement range and can adapt to the detection requirements in a high radioactive background environment. Furthermore, it can comprehensively capture the movement state of the short fuel rod in the feed chute, obtain the first signal sequence and the second signal sequence, and thus determine whether the feed chute is blocked according to the first signal sequence and the second signal sequence. Therefore, without changing the original structure of the ionization chamber detector, the accuracy of detecting blockages in the feed chute can be improved, so as to timely detect blockages in the feed chute and then timely handle the blockage problem of the feed chute to improve the processing efficiency of radioactive components.

[0090] The following describes the specific implementation methods of the above steps.

[0091] In step S110, the first signal value can be the radiation signal value (i.e., the signal value of the pulse signal) of the fuel short section collected by the first ionization chamber detector when a fuel short section passes through the first ionization chamber detector, or can be the signal value of the non-pulse signal collected by the first ionization chamber detector when no fuel short section passes through the first ionization chamber detector; the second signal value can be the radiation signal value (i.e., the signal value of the pulse signal) of the fuel short section collected by the second ionization chamber detector when a fuel short section passes through the second ionization chamber detector, or can be the signal value of the non-pulse signal collected by the second ionization chamber detector when no fuel short section passes through the second ionization chamber detector.

[0092] The first time value corresponding to the first signal value is the acquisition time value of this first signal value; the second time value corresponding to the second signal value is the acquisition time value of this second signal value.

[0093] The multiple first time values can be multiple consecutive time values within the shearing cycle duration of at least one shearing machine, and the number of first time values can be set according to the actual situation and is not limited here.

[0094] The multiple second time values can be multiple consecutive time values within the shearing cycle duration of at least one shearing machine, and the number of second time values can be set according to the actual situation and is not limited here.

[0095] The first time value among the multiple first time values can be equal to or not equal to any second time value among the multiple second time values, and this is not limited here.

[0096] Exemplarily, the electronic device can be communicatively connected to both the first ionization chamber detector and the second ionization detector, and thus can obtain the first signal sequence collected by the first ionization chamber detector from the first ionization chamber detector, and can obtain the second signal sequence collected by the second ionization chamber detector from the second ionization chamber detector. Or, the first signal sequence collected by the first ionization chamber detector and the second signal sequence collected by the second ionization chamber detector can be pre-stored in the electronic device for subsequent direct invocation.

[0097] In step S120, when the electronic device receives the first signal sequence and the second signal sequence, it can also determine whether the feed chute is blocked according to the first signal sequence and the second signal sequence.

[0098] That is to say, by analyzing the characteristics of the first signal sequence and the second signal sequence, it can be determined whether the feed chute is blocked.

[0099] In some embodiments, determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence includes:

[0100] When at least two first signal values are not within the preset range and all second signal values are within the preset range, it is determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the second ionization chamber detector;

[0101] Alternatively, when all first signal values are within the preset range and all second signal values are within the preset range, it is determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the transmission starting point of the fuel short section.

[0102] In this embodiment, according to the above method, it is possible to accurately determine whether the feed chute is blocked, and in the case of blockage, the blockage position of the feed chute can be determined.

[0103] It should be noted that when at least two first signal values are not within the preset range and all second signal values are within the preset range, it can be considered that a fuel short section passes through the first ionization chamber detector, and the first ionization chamber detector detects the radiation signal (i.e., pulse signal) of the fuel short rod. No fuel short section passes through the second ionization chamber detector, and the second ionization chamber detector does not detect the radiation signal (i.e., pulse signal) of the fuel short section, and only non-pulse signals are collected. At this time, it can be determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the second ionization chamber detector.

[0104] Similarly, when all first signal values are within the preset range and all second signal values are within the preset range, it can be considered that no fuel short section passes through the first ionization chamber detector and the second ionization chamber detector. Neither the first ionization chamber detector nor the second ionization chamber detector detects the radiation signal of the fuel short section, and only non-pulse signals are collected. At this time, it can be determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the transmission starting point of the fuel short section.

[0105] It should be noted that the preset range can be set according to the actual situation and is not limited here.

[0106] In some other embodiments, determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence includes:

[0107] When at least two first signal values are not within the preset range and at least two second signal values are not within the preset range, according to the first signal sequence and the second signal sequence, a target characteristic parameter is determined, and the target characteristic parameter includes at least one of a target time difference and a target integral difference;

[0108] According to the target characteristic parameter, it is determined whether the feed chute is blocked.

[0109] As an example, the target characteristic parameter includes a target time difference; as another example, the target characteristic parameter includes a target integral difference; as yet another example, the target characteristic parameter includes a target time difference and a target integral difference.

[0110] It should be noted that in the case where at least two first signal values are not within the preset range and at least two second signal values are not within the preset range, it can be considered that a short fuel segment has passed through the first ionization chamber detector and the second ionization chamber detector, and both the first ionization chamber detector and the second ionization chamber detector have detected the radiation signal of the short fuel segment. Whether the feed chute is blocked at this time needs to be further determined according to the target characteristic parameter.

[0111] In some examples, when the target characteristic parameter includes a target time difference, determining the target characteristic parameter according to the first signal sequence and the second signal sequence includes:

[0112] Determining a first target time value from all the first time values;

[0113] Among all the second time values, taking the second time value corresponding to the first target time value as the second target time value;

[0114] Determining the difference between the second target time value and the first target time value as the target time difference.

[0115] Exemplarily, a schematic diagram of the correspondence between time and signal value can be drawn according to the first signal sequence and the second signal sequence. The horizontal axis of this schematic diagram is time, and the vertical axis is the signal value. For example, the schematic diagram of the correspondence between time and signal value provided by the embodiments of the present application is as Figures 2 to 4 shown. Among them, Figures 2 to 4 the horizontal axis is time, and the vertical axis is the signal value; Δt represents the preset time difference, curve x represents the correspondence between the first time value and the first signal value, curve y represents the correspondence between the second time value and the second signal value, Cut n represents the duration of the nth shearing cycle of the shearing machine, and Cut n + 1 represents the duration of the (n + 1)th shearing cycle of the shearing machine.

[0116] It should be noted that each time the shearing machine operates, the detectors at the upper and lower measuring points of the feed chute (i.e., the first ionization chamber detector and the second ionization chamber detector) will generate pulse responses (i.e., pulse signals). Due to the falling time, for detecting the same short fuel segment, the response of the second ionization chamber detector lags behind that of the first ionization chamber detector by a preset time difference Δt. Considering that the position of the first ionization chamber detector is higher than that of the first ionization chamber detector, the overall spectrum shape will have a baseline lift. Between two shearing operations (i.e., between Cut n and Cut n + 1), the appearance of small signals at this time is affected by the active measurement of the feed hopper, but the influence of this signal on the measuring points here is not significant.

[0117] Exemplarily, the first target time value may be the first time value corresponding to the first signal value that is a pulse signal at the i-th position in the n-th shearing cycle; the second target time value may be the second time value corresponding to the second signal value that is a pulse signal at the i-th position in the n-th shearing cycle. Both n and i are positive integers, and i is less than or equal to n. The values of i and n can be set according to actual situations and are not limited herein. Of course, the first target time value and the second target time value can also be set according to actual situations and are not limited herein.

[0118] In some examples, when the target characteristic parameter includes the target integral difference, determining the target characteristic parameter according to the first signal sequence and the second signal sequence includes:

[0119] Determining a first integral value corresponding to the first signal sequence according to all the first signal values and all the first time values;

[0120] Determining a second integral value corresponding to the second signal sequence according to all the second signal values and all the second time values;

[0121] Determining the difference between the first integral value and the second integral value as the target integral difference.

[0122] Exemplarily, a schematic diagram of the correspondence between time and signal value can be drawn according to the first signal sequence and the second signal sequence. The horizontal coordinate in this schematic diagram is time, and the vertical coordinate is the signal value. For example, the schematic diagram of the correspondence between time and signal value provided in the embodiments of the present application is as Figure 3 shown, and the areas of region A and region B in Figure 3 can be calculated. Among them, the area of region A is the first integral value corresponding to the first signal sequence, and the area of region B is the second integral value corresponding to the second signal sequence.

[0123] In some examples, when the target characteristic parameter includes the target time difference, determining whether the feed chute is blocked according to the target characteristic parameter includes:

[0124] When the target time difference is less than or equal to the preset time difference, determining that the feed chute is not blocked;

[0125] Or,

[0126] When the target time difference is greater than the preset time difference, determining that the feed chute is blocked.

[0127] Exemplarily, as Figure 4 shown, within a shearing cycle of the shearing machine, if the second ionization chamber detector has not detected a pulse signal yet, that is, all the second signal values are within the preset range, it is determined that the feed chute is blocked at this time.

[0128] In some examples, the process of obtaining the preset time difference includes:

[0129] Obtain the first distance h1, the second distance h2, and the acceleration due to gravity g. Here, the first distance h1 is the vertical distance from the transmission starting point of the fuel short section to the central position of the first ionization chamber detector, and the second distance h2 is the vertical distance from the transmission starting point of the fuel short section to the central position of the second ionization chamber detector;

[0130] Substitute the first distance h1, the second distance h2, and the acceleration due to gravity g into formula (1) to calculate the preset time difference Δt;

[0131] Formula (1) includes:

[0132]

[0133] Exemplarily, as Figure 5 shown, assume that the fuel short section passing through the feed chute is a point source, and without considering the collimation of the first ionization chamber detector and the second ionization chamber detector. According to the free-fall motion formula where h is the falling height, V0 is the falling velocity, t is the falling time, and g is the acceleration due to gravity. For the first ionization chamber detector, if the times for the point source to pass through the upper, middle, and lower parts of the first ionization chamber detector are t1, t2, and t3 in sequence, then formula (2) can be obtained. Formula (2) includes:

[0134]

[0135] where h d is the vertical length of the sensitive regions of the first ionization chamber detector and the second ionization chamber detector.

[0136] Then the peak position of the response spectrum of the first ionization chamber detector is at time, and the time interval passing through the first ionization chamber detector is

[0137] Similarly for the second ionization chamber detector, assume the inclination angle of the feed chute relative to the ground is θ, and the times for the point source to pass through the upper, middle, and lower parts of the detector are t4, t5, and t6 in sequence. Then formula (3) can be obtained. Formula (3) includes:

[0138]

[0139] Then the peak position of the response spectrum of the second ionization chamber detector is at time, and the time interval passing through the second ionization chamber detector is

[0140] According to formula (2), formula (3) and formula (4), formula (1) is obtained by rearrangement. Among them, formula (4) includes: Δt = t5 - t2.

[0141] Exemplarily, the first distance h1, the second distance h2, the acceleration due to gravity g, the inclination angle θ, and the vertical length h of the sensitive regions of the first ionization chamber detector and the second ionization chamber detector d can all be obtained according to actual measurements.

[0142] Exemplarily, the acceleration due to gravity g can be 10 m / s² or 9.8 m / s².

[0143] For example, if the first distance h1 is 0.5 m, the second distance h2 is 2 m, and the acceleration due to gravity g is 9.8 m / s², then Δt ≈ 0.63888 s - 0.31944 s = 0.31944 s.

[0144] Of course, in other examples, the preset time difference can also be set according to the actual situation and is not limited here.

[0145] In some other examples, when the target characteristic parameter includes the target integral difference, determining whether the feed chute is blocked according to the target characteristic parameter includes:

[0146] When the target integral difference is less than or equal to the preset integral difference, it is determined that the feed chute is not blocked;

[0147] Or,

[0148] When the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked.

[0149] Exemplarily, the preset integral difference can be 10% of the first integral value. Of course, the preset integral difference can also be other values and is not limited here.

[0150] Exemplarily, when the target integral difference is greater than the preset integral difference and not equal to the first integral value, it is determined that the feed chute is partially blocked; when the target integral difference is equal to the first integral value, it is determined that the feed chute is completely blocked.

[0151] It can be understood that within a shearing cycle of the shearing machine, the second ionization chamber detector generates a response signal, that is, at least two second signal values are different. At this time, there are two situations, namely partial blockage and normal situation (i.e., unblocked). At this time, it is necessary to use the integral values of the pulse signals collected by the first ionization chamber detector and the second ionization chamber detector to assist in the judgment. If the integral values of the pulse signals collected by the first ionization chamber detector and the second ionization chamber detector are equal within the allowable error range (i.e., less than or equal to the preset integral difference), then whether it is Figure 2 the normal sliding as shown, or Figure 3The spreading and sliding shown are all normal situations. On the contrary, if the integral values of the pulse signals collected by the first ionization chamber detector and the second ionization chamber detector differ significantly within the allowable error range, that is, the target integral difference is greater than the preset integral difference, it is considered a partial blockage.

[0152] In some other examples, when the target characteristic parameters include the target time difference and the target integral difference, determining whether the feed chute is blocked according to the target characteristic parameters includes:

[0153] When the target time difference is greater than the preset time difference and the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked;

[0154] Or,

[0155] When the preset conditions are met, it is determined that the feed chute is not blocked;

[0156] Among them, the preset conditions include any one of the following:

[0157] The target time difference is greater than the preset time difference and the target integral difference is less than or equal to the preset integral difference;

[0158] The target time difference is less than the preset time difference and the target integral difference is less than or equal to the preset integral difference;

[0159] The target time difference is less than the preset time difference and the target integral difference is greater than or equal to the preset integral difference.

[0160] In this embodiment, considering the target time difference and the target integral difference comprehensively to determine whether the feed chute is blocked can further improve the accuracy of feed chute detection.

[0161] That is to say, only when the determination result corresponding to the target time difference is that the feed chute is blocked and the determination result corresponding to the target integral difference is that the feed chute is blocked, it is determined that the feed chute is blocked, and in other cases, it is determined that the feed chute is not blocked.

[0162] In some embodiments, before determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence, the method further includes:

[0163] Performing a first preprocessing on all the first signal values to obtain a plurality of third signal values to obtain a third signal sequence, where the first preprocessing is used to remove the noise and interference in all the first signal values, the third signal sequence includes a plurality of third signal values, and a plurality of first time values corresponding to the plurality of third signal values one by one;

[0164] Perform a second preprocessing on all the second signal values to obtain a plurality of fourth signal values, so as to obtain a fourth signal sequence. Wherein, the second preprocessing is used to remove noise and interference in all the second signal values. The fourth signal sequence includes a plurality of fourth signal values and a plurality of second time values corresponding to the plurality of fourth signal values one by one;

[0165] Update the first signal sequence to a third signal sequence and update the second signal sequence to a fourth signal sequence.

[0166] In this embodiment, by performing a first preprocessing on all the first signal values to remove noise and interference in all the first signal values, and then updating the first signal sequence to a third signal sequence, the accuracy of the first signal sequence can be improved, and further the accuracy of the detection of the blockage of the feed chute can be improved. Similarly, by performing a second preprocessing on all the second signal values to remove noise and interference in all the second signal values, and then updating the second signal sequence to a fourth signal sequence, the accuracy of the second signal sequence can be improved, and further the accuracy of the detection of the blockage of the feed chute can be improved.

[0167] Exemplarily, an amplifier can be used to perform signal amplification and preliminary processing (i.e., the first preprocessing) on all the first signal values to remove noise and interference in all the first signal values; an amplifier can be used to perform signal amplification and preliminary processing (i.e., the second preprocessing) on all the second signal values to remove noise and interference in all the second signal values.

[0168] It can be understood that the first signal values and the third signal values correspond to each other one by one, and the second signal values and the fourth signal values correspond to each other one by one. After updating the first signal sequence to a third signal sequence and updating the second signal sequence to a fourth signal sequence, digital conversion can also be performed on the updated first signal sequence and the updated second signal sequence for subsequent numerical signal processing and analysis. The updated first signal sequence and the updated second signal sequence can sequentially execute the above-mentioned step S110 and step S120.

[0169] In some examples, an anomaly detection mechanism can be built into the electronic device. This anomaly detection mechanism can identify and exclude abnormal signals caused by factors such as the failures of the first ionization detector and the second ionization detector, and cable interference. When an abnormal signal is detected, the electronic device can take fault-tolerant processing measures, such as automatically switching to a backup ionization detector, or temporarily ignoring the abnormal signal, to ensure the continuous and stable operation of the electronic device.

[0170] The anomaly detection mechanism uses various strategies and algorithms to identify and exclude abnormal signals caused by factors such as detector failures and cable interference, ensuring the accuracy and reliability of the measurement data, and thus guaranteeing the normal operation of the radioactive component processing system. Its principle mainly involves the following key aspects

[0171] 1. Signal Feature Analysis

[0172] (1) Normal Signal Pattern Recognition: In the initial stage of system operation, a signal feature model under normal operating conditions is established through a large number of experiments and historical data accumulation. For chute blockage monitoring, the normal signal patterns include the variation law of the radiation dose rate measured by the detectors at the top and bottom of the chute over time under different feeding conditions (such as different fuel short section lengths, activities, and feeding speeds). For example, during normal feeding, the dose rate will show certain periodic fluctuations as the fuel short sections slide down, and the fluctuation range is within a certain statistical interval.

[0173] (2) Abnormal Signal Feature Extraction: Analyze the possible abnormal features of the signal in cases such as detector failures and cable interferences. Detector failures may cause the measured value to remain constant (such as no signal output or a fixed output value when the detector is damaged), sudden jumps (such as unstable detector elements), or a significant increase in noise (such as random noise generated by detector electronic component failures). Cable interference may cause abnormal features such as periodic spike pulses (such as being interfered by nearby electromagnetic devices) in the signal, a sudden decrease or increase in signal intensity (such as unstable signal transmission due to poor cable contact).

[0174] 2. Multi - dimensional Data Comparison and Verification

[0175] Historical Data Comparison: Compare the real - time measurement data with the historical normal operation data. The system stores a large amount of historical data, including dose rate data and signal change patterns under different working conditions. By comparing with the historical data, if the real - time measurement data exceeds the normal fluctuation range of the historical data (for example, within the range of the mean of the dose rate plus or minus a preset multiple of the standard deviation, and the preset multiple can be set according to the actual situation), there may be an abnormal situation. This comparison can consider long - term trends (such as the change in the average value over several days or weeks) and short - term fluctuations (such as rapid changes within a few minutes) to comprehensively detect abnormal signals.

[0176] 3. Fault Diagnosis Algorithms and Fault - Tolerant Strategies

[0177] (1) Rule - and Model - based Fault Diagnosis: Establish a set of fault diagnosis rules and models based on signal features and data comparison results. For example, if the detector measurement value remains zero or exceeds the reasonable measurement range (that is, exceeds the theoretically maximum achievable value, which can be set according to the actual situation) for a period of time, and the difference compared with the data of other detectors is significant (for example, the difference size exceeds the preset difference value), and it is seriously inconsistent with the historical data pattern, then it is determined that the detector (i.e., the first ionization detector or the second ionization detector) may be faulty. For cable interference, if periodic abnormal pulse signals are detected and the pulse amplitude and frequency match the characteristics of known interference sources, it is judged as cable interference.

[0178] (2) Fault tolerance handling strategy: Once an abnormal signal is detected and the cause of the fault is diagnosed, the system adopts corresponding fault tolerance handling strategies. For the failure of the detector (i.e., the first ionization detector or the second ionization detector), if it is a single detector failure and the system is equipped with redundant detectors, it will automatically switch to the redundant detector to continue the measurement, and at the same time issue a detector failure alarm to prompt the maintenance personnel to replace or repair the faulty detector. For cable interference, the system may attempt to automatically adjust the signal acquisition parameters (such as increasing the filtering intensity, adjusting the sampling frequency, etc.) to reduce the interference effect. If the interference seriously affects the measurement results, it may pause the relevant measurement channels and issue a cable interference alarm to notify the maintenance personnel to check the cable line. After troubleshooting, the system can automatically resume the normal operation state and re-verify and analyze the measurement data to ensure the reliability and continuity of the system.

[0179] That is to say, it is possible to collect the normal signal characteristics under different feeding conditions and the abnormal signal characteristics under different fault conditions; compare the actual dose rate data with the historical dose rate data. If the comparison result exceeds the reasonable measurement range, then compare the signal characteristics corresponding to the actual dose rate data with the abnormal signal characteristics under different conditions to determine the fault category; according to the fault category, adopt the corresponding processing strategy for the fault category. Among them, the fault categories include cable interference and detector failure.

[0180] Embodiment 2

[0181] The embodiment of the present application further provides a method for processing radioactive components, which can be used in the process of transporting the fuel short segments to the dissolver for dissolution through the feeding chute after the radioactive components are cut into fuel short segments by a shearing machine. Exemplarily, the radioactive components may include spent fuel.

[0182] This method for processing radioactive components can be applied to a radioactive component processing system, which includes a blockage detection device. The blockage detection device includes a first ionization chamber detector arranged at the top of the feeding chute and a second ionization chamber detector arranged at the bottom of the feeding chute.

[0183] Exemplarily, an ionization chamber detector is an instrument used to detect and measure ionizing radiation, such as alpha particles, beta particles, gamma rays, and neutrons, etc.

[0184] Exemplarily, both the first ionization chamber detector and the second ionization chamber detector can be transient response ionization detectors. The transient response ionization detector has a response speed in the millisecond level, capable of quickly capturing the signal changes when a short fuel segment passes by, and thus can further improve the accuracy of detecting blockages in the feed chute. More specifically, two transient response ionization detectors can be used to collect in real time the gamma ray signals generated when a short fuel segment passes through the feed chute. The transient response ionization detector has characteristics of a wide measurement range (0.5 mGy / h to 500 Gy / h) and fast response (≤10 ms), and can accurately capture the instantaneous changes when a short fuel segment passes through the chute.

[0185] Exemplarily, the transient response ionization chamber detector can adopt a coaxial high-low range composite design to extend the measurement range to 5 to 6 orders of magnitude, meeting the measurement requirements in high dose rate and high radiation environments. The housing and key components of the transient response ionization chamber detector are made of stainless steel and special materials that are resistant to high temperature and radiation, ensuring the long-term stable operation of the device in a high background environment.

[0186] This method for processing radioactive components can be executed by a radioactive component processing system, an electronic device, etc. Here, an example will be given with the method for processing radioactive components being executed by an electronic device.

[0187] The method for processing radioactive components provided by the embodiments of this application may include step S210 to step S230, or include step S210, step S220, and step S240.

[0188] S210. Cut the radioactive component into multiple short fuel segments.

[0189] S220. Make the multiple short fuel segments enter the dissolver through the feed chute. When the multiple short fuel segments pass through the feed chute, determine whether the feed chute is blocked according to any one of the blockage detection methods in Embodiment 1.

[0190] S230. When the feed chute is blocked, output an alarm message, and the alarm message is used to indicate that the feed chute is blocked.

[0191] Or,

[0192] S240. When the feed chute is not blocked, the multiple short fuel segments enter the dissolver for dissolution.

[0193] According to the method for processing radioactive components provided by the embodiments of this application, when the feed chute is blocked, an alarm message is output, which can timely remind the staff that the feed chute is blocked, so that the staff can timely process the blocked feed chute to improve the efficiency of processing radioactive components; when the feed chute is not blocked, the multiple short fuel segments are dissolved to complete the processing of the short fuel segments.

[0194] In step S210, by way of example, the spent fuel processing system may include a shearing device, and the radioactive components may be sheared into a plurality of short fuel segments by the shearing device.

[0195] For the specific implementation manner of step S220, please refer to Embodiment 1, which will not be elaborated here.

[0196] It should be noted that the plurality of short fuel segments may enter the dissolver through the feed chute under the action of gravity.

[0197] In step S230, the alarm information may be output in the forms of text, voice, light, etc. For example, the voice may broadcast "The feed chute is blocked, please handle it in time" to output the alarm information. Also for example, in the case of a blocked feed chute, the alarm information of "The feed chute is blocked, please handle it in time" may be displayed on the display screen of the electronic device.

[0198] By way of example, in the case of determining the blockage position and / or blockage state, the blockage position and / or blockage state may be displayed on the display screen of the electronic device. Among them, the blockage state includes blocked and unblocked, and blocked includes completely blocked and partially blocked.

[0199] By way of example, in the case of a blocked feed chute, the electronic device records and stores the time of the blocked feed chute, etc., for subsequent analysis.

[0200] It can be understood that in the case of an unblocked feed chute, no operation needs to be performed.

[0201] In some embodiments, in order to facilitate the operator to monitor and record the monitoring data in real time, the embodiments of the present application are also equipped with an electronic device, and a data display and management system is equipped in the electronic device. The schematic structural diagram of the electronic device provided by the embodiments of the present application is as Figure 7 shown. Figure 7Among them, the data display and management system of the electronic device includes a DCS distributed system, a DCC data acquisition cabinet of a remote station (RS), and a DAC data integration and analysis cabinet of a network cabinet (NR). Among them, the DCC data acquisition cabinet includes an LDU local display unit, a DPU1 data processing unit, a DPU2 data processing unit, a DCU1 data acquisition unit, a DCU2 data acquisition unit, and a USP backup power unit. The DAC data integration and analysis cabinet may include a display screen, a keyboard and mouse, a server, a network switch, a distribution panel, and a backup power unit. The distributed system DCS can send a start shear signal and a shear signal to the DCC data acquisition cabinet, and the DCC data acquisition cabinet can send a real-time dose rate and a chute blockage signal to the DCS distributed system. The DCC data acquisition cabinet can send monitoring data to the DAC data integration and analysis cabinet, and parameter settings can also be performed between the DCC data acquisition cabinet and the DAC data integration and analysis cabinet. Both the UPS backup power unit and the backup power unit can supply an AC voltage of 220V. The DCU1 data acquisition unit and the DCU2 data acquisition unit can further analyze and process the received signals, including calculating parameters such as the target time difference (i.e., the target time difference value) and the integral area (i.e., the first integral value and the second integral value), and judging whether the feed chute is blocked according to a preset algorithm model (i.e., the above-mentioned step S120). The DPU1 data processing unit adopts a redundant design to ensure the high reliability and availability of the system. The LDU local display unit is equipped with a high-resolution display screen to display the measurement data of the dual detectors and the system status in real time, providing an intuitive monitoring interface for operators. The centralized data management system (i.e., the DAC data integration and analysis cabinet) is responsible for the collection, storage, display, and management of all monitoring data, including devices such as data acquisition cabinets, data servers, and engineer stations, ensuring the real-time and security of the data.

[0202] Exemplarily, in the case of a blocked feed chute, an alarm message can be sent to the LDU local display unit and the centralized data management system (i.e., the DAC data integration and analysis cabinet).

[0203] The above data display and management system has at least the following functions:

[0204] 1. Real-time display: The data display unit can display the measurement data of two detectors, alarm parameters, device status and other information in real time.

[0205] 2. Historical query: The data integration and analysis cabinet supports the query and analysis functions of historical data, helping operators understand the long-term operation status of the equipment and optimize the monitoring strategy.

[0206] 3. Alarm management: Once a blockage is detected, the system will immediately send out an audible and visual alarm signal and clearly display the blockage location and status through the data display unit; at the same time, automatically record and save the alarm record for subsequent analysis.

[0207] In some examples, the timing diagram of the electronic device is as Figure 8 shown. The timing diagram may include the time axis / es, the shearing signal of the shearing machine, the measuring point at the upper end of the feeding chute (i.e., the first ionization chamber detector), the measuring point at the lower end of the feeding chute (i.e., the second ionization chamber detector), and the timing corresponding one by one to the calculated value of the middle section blockage (i.e., the target integral difference). For the specific timing, please refer to Figure 8 , which will not be elaborated here.

[0208] It should be noted that the signal input switch quantity of the electronic device is the shearing signal, and the signal output includes three switch quantities and three analog quantities. The switch quantity corresponding to the measuring point at the upper end of the feeding chute is the upper end blockage, and the analog quantity corresponding to the measuring point at the upper end of the feeding chute is the upper end dose rate; the switch quantity corresponding to the measuring point at the lower end of the feeding chute is the lower end blockage, and the analog quantity corresponding to the measuring point at the lower end of the feeding chute is the lower end dose rate; the switch quantity corresponding to the calculated value of the middle section blockage of the feeding chute is the middle section blockage, and the analog quantity corresponding to the calculated value of the middle section blockage of the feeding chute is the cumulative dose difference.

[0209] Exemplarily, the first ionization chamber detector may be arranged at the position where the blanking hopper of the shearing machine enters the feeding chute, and the second ionization chamber detector may be arranged at the position where the feeding chute enters the flat groove of the dissolver. The first ionization chamber detector and the second ionization chamber detector are installed through a guiding tube to ensure the accuracy and stability of the measurement. After the system is installed, on-site testing and debugging work are carried out. The effectiveness and accuracy of the system are verified through simulation experiments and actual operation data, and the algorithm parameters and logic judgment rules are optimized and adjusted according to the test results.

[0210] It should be noted that the embodiments of the present application have at least the following beneficial effects:

[0211] 1. Real-time monitoring and accurate judgment: Through the design of double ionization chamber detectors and an advanced algorithm model (i.e., step S120) in the embodiments of the present application, the blockage situation of the feeding chute can be monitored in real time, and the blockage position and degree can be accurately judged, providing timely and effective decision-making support for operators.

[0212] 2. Adaptability to high background environment: The ionization chamber detector has wide range and fast response characteristics, can work stably in a high background environment, and is not affected by surrounding radiation interference, ensuring the accuracy of the monitoring results.

[0213] 3. High reliability and availability: The system adopts a redundant design, and both the data processing unit and the data acquisition unit are equipped with independent power supply units and signal amplifiers, improving the reliability and availability of the system.

[0214] Embodiment 3

[0215] The embodiments of the present application provide a blockage detection device, a first ionization chamber detector, a second ionization chamber detector, and a determination module.

[0216] As shown in Figure 6 , the first ionization chamber detector is disposed at the top of the feed chute for collecting a first signal sequence, the first signal sequence includes a plurality of first signal values, and a plurality of first time values corresponding to the plurality of first signal values one by one;

[0217] As shown in Figure 6 , the second ionization chamber detector is disposed at the bottom of the feed chute for collecting a second signal sequence, the second signal sequence includes a plurality of second signal values, and a plurality of second time values corresponding to the plurality of second signal values one by one;

[0218] A determination module, respectively connected to the first ionization chamber detector and the second ionization chamber detector, for determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence.

[0219] In some embodiments, the apparatus further includes:

[0220] A first collimation shielding module, the first collimation shielding module is loaded with the first ionization chamber detector, and the first collimation shielding module is provided with a first collimation hole, and the first collimation hole is disposed close to the detection surface of the first ionization chamber detector;

[0221] A second collimation shielding module, the second collimation shielding module is loaded with the second ionization chamber detector, and the second collimation shielding module is provided with a second collimation hole, and the second collimation hole is disposed close to the detection surface of the second ionization chamber detector.

[0222] In this embodiment, adding a first collimation shielding module outside the first ionization chamber detector can reduce the interference of surrounding radiation on the first ionization chamber detector and the background noise. Similarly, adding a second collimation shielding module outside the second ionization chamber detector can reduce the interference of surrounding radiation on the second ionization chamber detector and the background noise.

[0223] Exemplarily, both the first collimation shielding module and the second collimation shielding module are collimation shielding bodies, and the collimation shielding bodies are supported by radiation-resistant materials such as stainless steel, and are internally designed with precise collimation channels to ensure that only γ-rays from a specific direction can be received by the first ionization chamber detector and the second ionization chamber detector. Exemplarily, the collimation shielding body includes a shielding body and a collimation window as shown in Figure 6 .

[0224] Exemplarily, Figure 6 also shows a shear hopper, a cut fuel short section, a sliding fuel short section, and a measured fuel short section.

[0225] In some embodiments, the first determination module is specifically configured to:

[0226] In the case where at least two first signal values are not within the preset range and all second signal values are within the preset range, it is determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the second ionization chamber detector;

[0227] Alternatively, in the case where all first signal values are within the preset range and all second signal values are within the preset range, it is determined that the feed chute is blocked, and the blockage position is determined to be between the first ionization chamber detector and the transmission starting point of the fuel short section.

[0228] In some embodiments, the first determination module is specifically configured to:

[0229] In the case where at least two first signal values are not within the preset range and at least two second signal values are not within the preset range, according to the first signal sequence and the second signal sequence, determine target characteristic parameters, where the target characteristic parameters include at least one of a target time difference and a target integral difference;

[0230] According to the target characteristic parameters, determine whether the feed chute is blocked.

[0231] In some embodiments, in the case where the target characteristic parameters include a target time difference, the first determination module is specifically configured to:

[0232] Determine a first target time value from all first time values;

[0233] Among all second time values, use the second time value corresponding to the first target time value as the second target time value;

[0234] Determine the difference between the second target time value and the first target time value as the target time difference.

[0235] In some embodiments, in the case where the target characteristic parameters include a target integral difference, the first determination module is specifically configured to:

[0236] According to all first signal values and all first time values, determine a first integral value corresponding to the first signal sequence;

[0237] According to all second signal values and all second time values, determine a second integral value corresponding to the second signal sequence;

[0238] Determine the difference between the first integral value and the second integral value as the target integral difference.

[0239] In some embodiments, in the case where the target characteristic parameters include a target time difference, the first determination module is specifically configured to:

[0240] In the case where the target time difference is less than or equal to the preset time difference, determine that the feed chute is not blocked;

[0241] Alternatively,

[0242] when the target time difference is greater than the preset time difference, it is determined that the feed chute is blocked.

[0243] In some embodiments, the process of obtaining the preset time difference includes:

[0244] Obtain a first distance h1, a second distance h2, and the acceleration due to gravity g, where the first distance h1 is the vertical distance from the transmission starting point of the short fuel segment to the central position of the first ionization chamber detector, and the second distance h2 is the vertical distance from the transmission starting point of the short fuel segment to the central position of the second ionization chamber detector;

[0245] Substitute the first distance h1, the second distance h2, and the acceleration due to gravity g into formula (1) to calculate the preset time difference Δt;

[0246] Formula (1) includes:

[0247]

[0248] In some embodiments, when the target characteristic parameter includes the target integral difference, the first determination module is specifically configured to:

[0249] when the target integral difference is less than or equal to the preset integral difference, it is determined that the feed chute is not blocked;

[0250] Alternatively,

[0251] when the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked.

[0252] In some embodiments, when the target characteristic parameter includes the target time difference and the target integral difference, the first determination module is specifically configured to:

[0253] when the target time difference is greater than the preset time difference and the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked;

[0254] Alternatively,

[0255] when the preset condition is satisfied, it is determined that the feed chute is not blocked;

[0256] wherein the preset condition includes any one of the following:

[0257] the target time difference is greater than the preset time difference and the target integral difference is less than or equal to the preset integral difference;

[0258] the target time difference is less than the preset time difference and the target integral difference is less than or equal to the preset integral difference;

[0259] The target time difference is less than the preset time difference, and the target integral difference is greater than or equal to the preset integral difference.

[0260] In some embodiments, the device further includes:

[0261] A first preprocessing module, configured to perform first preprocessing on all first signal values to obtain a plurality of third signal values, so as to obtain a third signal sequence, wherein the first preprocessing is used to remove noise and interference in all first signal values, the third signal sequence includes a plurality of third signal values, and a plurality of first time values corresponding to the plurality of third signal values one by one;

[0262] A second preprocessing module, configured to perform second preprocessing on all second signal values to obtain a plurality of fourth signal values, so as to obtain a fourth signal sequence, wherein the second preprocessing is used to remove noise and interference in all second signal values, the fourth signal sequence includes a plurality of fourth signal values, and a plurality of second time values corresponding to the plurality of fourth signal values one by one;

[0263] An update module, respectively connected to the first preprocessing module and the second preprocessing module, configured to update the first signal sequence to the third signal sequence, and update the second signal sequence to the fourth signal sequence.

[0264] The blockage detection device provided by the embodiments of the present application can be used to execute the blockage detection method, that is, it has the beneficial effects and implementation manners of the blockage detection method provided in Embodiment 1 of the present application. Specifically, reference can be made to the specific description of the blockage detection method in the above-mentioned Embodiment 1, and this embodiment will not be elaborated herein.

[0265] Embodiment 4

[0266] The embodiments of the present application further provide a radioactive component processing system, including:

[0267] A shearer, configured to cut the radioactive component into a plurality of fuel short segments;

[0268] A dissolver, configured to dissolve the plurality of fuel short segments;

[0269] The blockage detection device according to any one of Embodiment 3 is connected between the shearer and the dissolver, and is configured to determine whether the feed chute is blocked when the plurality of fuel short segments pass through the feed chute; and output an alarm message when it is determined that the feed chute is blocked, the alarm message is used to indicate that the feed chute is blocked; and, when it is determined that the feed chute is not blocked, enable the plurality of fuel short segments to enter the dissolver to dissolve the plurality of fuel short segments.

[0270] Exemplarily, the feed chute is connected between the shearer and the dissolver. The plurality of fuel short segments can pass through the feed chute under the action of gravity and enter the dissolver.

[0271] The radioactive component processing system provided by the embodiment of the present application can be used to execute the radioactive component processing method, that is, it has the beneficial effects and implementation manners of the radioactive component processing method provided in Embodiment 2 of the present application. Specifically, reference can be made to the specific description of the radioactive component processing method in the above-mentioned Embodiment 2, and this embodiment will not be elaborated herein.

[0272] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present application. However, the present application is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. A blockage detection method, characterized in that: Applied to a blockage detection device, the blockage detection device comprises a first ionization chamber detector arranged at the top of a feed chute, and a second ionization chamber detector arranged at the bottom of the feed chute; The method comprises: Acquire a first signal sequence collected by the first ionization chamber detector and a second signal sequence collected by the second ionization chamber detector, wherein the first signal sequence includes a plurality of first signal values ​​and a plurality of first time values ​​corresponding one-to-one to the plurality of first signal values, and the second signal sequence includes a plurality of second signal values ​​and a plurality of second time values ​​corresponding one-to-one to the plurality of second signal values; Based on the first signal sequence and the second signal sequence, it is determined whether the feed chute is blocked.

2. The method according to claim 1, characterized in that Determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence includes: When at least two first signal values ​​are not within the preset range and all second signal values ​​are within the preset range, determining that the feed chute is blocked and determining that the blockage position is between the first ionization chamber detector and the second ionization chamber detector; Alternatively, when all the first signal values ​​are within a preset range and all the second signal values ​​are within a preset range, it is determined that the feed chute is blocked and the blockage position is determined to be between the first ionization chamber detector and the transmission start point of the fuel short section.

3. The method according to claim 1, characterized in that Determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence includes: When at least two first signal values ​​are not within a preset range and at least two second signal values ​​are not within a preset range, determining a target characteristic parameter according to the first signal sequence and the second signal sequence, the target characteristic parameter comprising at least one of a target time difference and a target integral difference; According to the target characteristic parameter, it is determined whether the feed chute is blocked.

4. The method according to claim 3, characterized in that In a case where the target characteristic parameter includes a target time difference, determining the target characteristic parameter according to the first signal sequence and the second signal sequence includes: determining a first target time value from all first time values; Among all the second time values, the second time value corresponding to the first target time value is used as the second target time value; A difference between the second target time value and the first target time value is determined as a target time difference.

5. The method according to claim 3, characterized in that: In a case where the target characteristic parameter includes a target integral difference, determining the target characteristic parameter according to the first signal sequence and the second signal sequence includes: Determine a first integral value corresponding to the first signal sequence according to all first signal values ​​and all first time values; Determine a second integral value corresponding to the second signal sequence according to all second signal values ​​and all second time values; A difference between the first integrated value and the second integrated value is determined as a target integrated difference.

6. The method according to claim 3, characterized in that In the case where the target characteristic parameter includes a target time difference, determining whether the feed chute is blocked according to the target characteristic parameter includes: When the target time difference is less than or equal to the preset time difference, determining that the feed chute is not blocked; or, When the target time difference is greater than the preset time difference, it is determined that the feed chute is blocked.

7. The method according to claim 6, characterized in that The process of obtaining the preset time difference includes: Acquire a first distance h1, a second distance h2, and a gravitational acceleration g, wherein the first distance h1 is a vertical distance from the transmission starting point of the fuel short segment to the center position of the first ionization chamber detector, and the second distance h2 is a vertical distance from the transmission starting point of the fuel short segment to the center position of the second ionization chamber detector; Substituting the first distance h1, the second distance h2 and the gravitational acceleration g into formula (1), the preset time difference Δt is calculated; The formula (1) includes:

8. The method according to claim 3, characterized in that In the case where the target characteristic parameter includes a target integral difference, determining whether the feed chute is blocked according to the target characteristic parameter includes: When the target integral difference is less than or equal to the preset integral difference, determining that the feed chute is not blocked; or, When the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked.

9. The method according to claim 3, characterized in that: In the case where the target characteristic parameters include a target time difference and a target integral difference, determining whether the feed chute is blocked according to the target characteristic parameters includes: When the target time difference is greater than the preset time difference, and the target integral difference is greater than the preset integral difference, it is determined that the feed chute is blocked; or, Under the condition that the preset conditions are met, it is determined that the feed chute is not blocked; The preset condition includes any one of the following: The target time difference is greater than the preset time difference, and the target integral difference is less than or equal to the preset integral difference; The target time difference is less than the preset time difference, and the target integral difference is less than or equal to the preset integral difference; The target time difference is smaller than a preset time difference, and the target integral difference is greater than or equal to a preset integral difference.

10. The method according to claim 1, characterized in that Before determining whether the feed chute is blocked according to the first signal sequence and the second signal sequence, the method further comprises: Performing a first preprocessing on all the first signal values ​​to obtain a plurality of third signal values ​​to obtain a third signal sequence, wherein the first preprocessing is used to remove noise and interference in all the first signal values, and the third signal sequence includes the plurality of third signal values ​​and a plurality of first time values ​​corresponding one-to-one to the plurality of third signal values; Performing a second preprocessing on all the second signal values ​​to obtain a plurality of fourth signal values ​​to obtain a fourth signal sequence, wherein the second preprocessing is used to remove noise and interference in all the second signal values, and the fourth signal sequence includes the plurality of fourth signal values ​​and a plurality of second time values ​​corresponding one-to-one to the plurality of fourth signal values; The first signal sequence is updated to the third signal sequence, and the second signal sequence is updated to the fourth signal sequence.

11. A method for processing a radioactive component, characterized in that: Applied to a radioactive component processing system, the radioactive component processing system comprises a blockage detection device, the blockage detection device comprises a first ionization chamber detector arranged at the top of a feed chute, and a second ionization chamber detector arranged at the bottom of the feed chute; Cutting the radioactive assembly into short fuel segments; Allowing a plurality of short fuel segments to enter the dissolver through a feed chute, and determining whether the feed chute is blocked according to the blockage detection method according to any one of claims 1 to 10 when the plurality of short fuel segments pass through the feed chute; In the case where the feed chute is blocked, outputting an alarm message, wherein the alarm message is used to indicate that the feed chute is blocked; or, In the case where the feed chute is not blocked, a plurality of short segments of fuel enter the dissolver for dissolution.

12. A blockage detection device, characterized in that: include: A first ionization chamber detector, disposed at the top of the feed chute, for collecting a first signal sequence, wherein the first signal sequence includes a plurality of first signal values ​​and a plurality of first time values ​​corresponding one-to-one to the plurality of first signal values; A second ionization chamber detector, disposed at the bottom of the feed chute, for collecting a second signal sequence, wherein the second signal sequence includes a plurality of second signal values ​​and a plurality of second time values ​​corresponding one-to-one to the plurality of second signal values; The determination module is connected to the first ionization chamber detector and the second ionization chamber detector respectively, and is used to determine whether the feed chute is blocked according to the first signal sequence and the second signal sequence.

13. The device according to claim 12, characterized in that The device also includes: A first collimation and shielding module, wherein the first ionization chamber detector is loaded in the first collimation and shielding module, and the first collimation hole is provided in the first collimation and shielding module, and the first collimation hole is provided closely to the detection surface of the first ionization chamber detector; The second collimation and shielding module is provided with the second ionization chamber detector and the second collimation and shielding module is provided with a second collimation hole, and the second collimation hole is provided closely to the detection surface of the second ionization chamber detector.

14. The device according to claim 12 or 13, characterized in that The first ionization chamber detector and the second ionization chamber detector are both transient response ionization chamber detectors.

15. A radioactive component processing system, characterized in that: include: A shear for shearing the radioactive assembly into a plurality of short fuel segments; A dissolver for dissolving a plurality of short sections of fuel; The blockage detection device according to any one of claims 12 to 14 is connected between the shearer and the dissolver, and is used to determine whether the feed chute is blocked when multiple short fuel segments pass through the feed chute; and when it is determined that the feed chute is blocked, output an alarm message, wherein the alarm message is used to indicate that the feed chute is blocked; and when it is determined that the feed chute is not blocked, allow the multiple short fuel segments to enter the dissolver to dissolve the multiple short fuel segments.

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