Uranium concentration detection system in nuclear fuel post-treatment process

Abstract

The embodiment of the invention discloses a uranium concentration detection system in a nuclear fuel post-treatment process. The uranium concentration detection system in the nuclear fuel post-treatment process comprises a buffer device and a detection device. The buffer device comprises a buffer container and a liquid inlet pipe, the buffer container is communicated to the process pipeline through the liquid inlet pipe, and the buffer container is used for buffering a to-be-detected solution from the process pipeline. The detection device comprises a sample container, a first connecting pipe and a detector, the sample container is communicated with the buffer container through the first connecting pipe, the sample container is used for containing a to-be-detected solution from the buffer container, and the detector is used for detecting the uranium concentration in the to-be-detected solution in the sample container. According to the detection system provided by the embodiment of the invention, the liquid flow stability of the to-be-detected solution flowing into the sample container is improved, so that the problem of unstable liquid flow is solved, then the uranium concentration of the to-be-detected solution in the sample container is detected through the detector, and the accuracy of the detection result of the uranium concentration can be improved to a certain extent.

Description

Technical Field

[0001] This application relates to the technical field of nuclear fuel reprocessing technology, and particularly relates to a detection system for uranium concentration in a nuclear fuel reprocessing technology. Background Art

[0002] In the nuclear fuel reprocessing technology, the uranium concentrations at the 2DU and 3DU process points are the main indicators reflecting the process operation and equipment stability, and need to be measured in time and fed back to the process for control. The on-line measurement technology can monitor the instantaneous change of uranium concentration in real time. Compared with off-line analysis, it does not require chemical treatment, does not damage the liquid flow, can continuously monitor, save manpower and material resources, and can realize long-distance measurement. The on-line measurement of uranium concentration mostly adopts the γ absorption method.

[0003] In the related technology, the nuclear fuel reprocessing technology generally adopts γ absorption to on-line monitor the uranium concentration, and adopts a straight pipe mode with bottom-in and top-out. The sample enters from the bottom of the pipeline and flows out from the upper part, resulting in the problem of unstable liquid flow of the sample transported by the process, thus affecting the accuracy of the detection result of the detector. Summary of the Invention

[0004] In view of this, the embodiments of this application are expected to provide a detection system for uranium concentration in a nuclear fuel reprocessing technology, which can improve the accuracy of the detection result of uranium concentration to a certain extent.

[0005] To solve the above problems, the technical solution of the embodiments of this application is implemented as follows:

[0006] The embodiments of this application provide a detection system for uranium concentration in a nuclear fuel reprocessing technology, including:

[0007] A buffer device, the buffer device includes a buffer container and a liquid inlet pipe, the buffer container is connected to a process pipeline through the liquid inlet pipe, and the buffer container is used to buffer the solution to be measured from the process pipeline;

[0008] A detection device, the detection device includes a sample container, a first connecting pipe and a detector, the sample container is connected to the buffer container through the first connecting pipe, the sample container is used to hold the solution to be measured from the buffer container, and the detector is used to detect the uranium concentration in the solution to be measured in the sample container.

[0009] In some embodiments, the buffer device further includes a buffer exhaust pipe, the buffer exhaust pipe is connected to the top of the buffer container, and the buffer exhaust pipe is used to discharge the gas in the buffer container.

[0010] In some embodiments, the buffer device further includes an overflow pipe, the overflow pipe is connected to the top of the buffer container and is lower than the connection between the buffer exhaust pipe and the buffer container.

[0011] In some embodiments, the detection system further includes a reflux pipe, and one end of the overflow pipe away from the buffer container is connected to the process pipeline through the reflux pipe.

[0012] In some embodiments, the detection system further includes a drain pipe, one end of the drain pipe is connected to the bottom of the buffer container, and the other end of the drain pipe is connected to the reflux pipe.

[0013] In some embodiments, the detection device further includes a monitoring exhaust pipe, the monitoring exhaust pipe is connected to the top of the sample container, and the monitoring exhaust pipe is used to discharge the gas in the sample container.

[0014] In some embodiments, the detection device further includes a reflux pipe, and the detection device further includes a second connection pipe communicating with the sample container, and one end of the second connection pipe away from the sample container is connected to the process pipeline through the reflux pipe.

[0015] In some embodiments, the detection system further includes a drain pipe, one end of the drain pipe is connected to the bottom of the sample container, and the other end of the drain pipe is connected to the reflux pipe.

[0016] In some embodiments, the detection device further includes a flow meter, and the flow meter is used to detect the flow rate of the liquid in the second connection pipe.

[0017] In some embodiments, the detection system further includes a cleaning pipe, the cleaning pipe is connected to the top of the sample container and / or the buffer container, and the cleaning pipe is used to clean the detection system.

[0018] In the uranium concentration detection system in the nuclear fuel reprocessing process according to the embodiments of the present application, by setting the uranium concentration detection system in the nuclear fuel reprocessing process to include a buffer device and a detection device, and by first caching the solution to be measured in the process pipeline in the buffer container of the buffer device, and then controlling the solution to be measured in the buffer container to flow into the sample container of the detection device. That is to say, by setting the buffer device to cache the solution to be measured flowing in from the process pipeline and then flowing into the sample container, it is beneficial to improve the liquid flow stability of the solution to be measured flowing into the sample container, thereby improving the problem of unstable liquid flow. Then, the uranium concentration of the solution to be measured in the sample container is detected by the detector, which can improve the accuracy of the uranium concentration detection result to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the first perspective of the uranium concentration detection system in the nuclear fuel reprocessing process according to some embodiments of the present application;

[0020] Figure 2Schematic structural diagram of the second perspective of the uranium concentration detection system in the nuclear fuel reprocessing process of some embodiments of the present application;

[0021] Figure 3 Schematic structural diagram of the third perspective of the uranium concentration detection system in the nuclear fuel reprocessing process of some embodiments of the present application;

[0022] Figure 4 Schematic structural diagram of the fourth perspective of the uranium concentration detection system in the nuclear fuel reprocessing process of some embodiments of the present application.

[0023] Explanation of reference numerals

[0024] 10. Buffer device; 11. Buffer container; 12. Liquid inlet pipe; 13. Buffer exhaust pipe; 14. Overflow pipe; 20. Detection device; 21. Sample container; 22. First connecting pipe; 23. Monitoring exhaust pipe; 24. Second connecting pipe; 30. Return pipe; 40. Drain pipe; 50. Cleaning pipe; 60. Valve. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0026] In the description of the embodiments of the present application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0027] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0031] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] An embodiment of the present application provides a system for detecting uranium concentration in a nuclear fuel post-processing process.

[0033] See also Figures 1 to 4 The system for detecting uranium concentration in a nuclear fuel reprocessing process includes a buffer device 10 and a detection device 20. The buffer device 10 includes a buffer container 11 and a liquid inlet pipe 12. The buffer container 11 is connected to a process pipeline via the liquid inlet pipe 12 and is used to buffer a solution to be tested from the process pipeline. The detection device includes a sample container 21, a first connecting pipe 22, and a detector. The sample container 21 is connected to the buffer container 11 via the first connecting pipe 22 and is used to hold the solution to be tested from the buffer container 11. The detector is used to detect the uranium concentration in the solution to be tested in the sample container 21.

[0034] Exemplarily, the buffer container 11 may be a buffer tank, that is, a portion of the test solution in the process pipeline may be drawn out to flow into the buffer tank, which is equivalent to a transfer station for receiving the test solution with unstable liquid flow.

[0035] Exemplarily, the sample container 21 can be a sample cell. That is to say, the flow of the solution to be measured in the buffer cell can be controlled to flow into the sample cell, so as to form a solution to be measured with stable liquid flow from the solution to be measured with unstable liquid flow, and the solution to be measured with stable liquid flow in the sample cell can be detected, thereby improving the accuracy of the detection result of uranium concentration.

[0036] Here, the process pipeline refers to the pipeline of the nuclear fuel reprocessing process.

[0037] Exemplarily, the buffer container 11 and the sample container 21 are arranged side by side. In this way, it is beneficial to further improve the liquid flow stability of the solution to be measured flowing into the sample container 21.

[0038] Exemplarily, the first connecting pipe 22 is horizontally arranged between the buffer container 11 and the sample container 21, which can further improve the liquid flow stability of the solution to be measured flowing into the sample container 21.

[0039] Exemplarily, the first connecting pipe 22 is connected to the bottoms of the buffer container 11 and the sample container 21.

[0040] Here, the bottom of the buffer container 11 refers to the part below half of the buffer container 11 in the vertical direction.

[0041] The bottom of the sample container 21 refers to the part below half of the sample container 21 in the vertical direction.

[0042] Exemplarily, the sample container 21 includes a transmission window, and the particle source can enter and exit the channel of the sample container 21 through the transmission window to realize the on-line detection of uranium concentration.

[0043] Exemplarily, the number of transmission windows can be one or more.

[0044] Exemplarily, the number of transmission windows can be two.

[0045] Exemplarily, the transmission window can be a γ-ray transmission window.

[0046] Exemplarily, the particle source can be an americium source.

[0047] In the nuclear fuel reprocessing process, the uranium concentration at the 2DU and 3DU process points is the main index reflecting the process operation and equipment stability, and it needs to be measured in time and fed back to the process for control. The on-line measurement technology can monitor the instantaneous change of uranium concentration in real time. Compared with off-line analysis, it does not require chemical treatment, does not damage the liquid flow, can continuously monitor, save manpower and material resources, and can realize long-distance measurement. The smoothness of the solution to be measured in the uranium concentration on-line detection system is crucial. A reasonable flow path design can ensure the representativeness of sampling, make the sample flow into the sample container 21 evenly and stably, obtain the accurate concentration and feed it back to the process in time.

[0048] In the uranium concentration detection system of the nuclear fuel reprocessing process according to the embodiments of the present application, by setting the uranium concentration detection system in the nuclear fuel reprocessing process to include a buffer device 10 and a detection device 20, and first buffering the solution to be measured in the process pipeline in the buffer container 11 of the buffer device 10, and then controlling the solution to be measured in the buffer container 11 to flow into the sample container 21 of the detection device. That is to say, by setting the buffer device 10 to buffer the solution to be measured flowing in from the process pipeline and then flowing into the sample container 21, it is beneficial to improve the liquid flow stability of the solution to be measured flowing into the sample container 21, thereby improving the problem of unstable liquid flow. Then, the uranium concentration of the solution to be measured in the sample container 21 is detected by a detector, which can improve the accuracy of the uranium concentration detection result to a certain extent.

[0049] In the related art, the solution to be measured contains a certain amount of air, which may affect the liquid flow stability and the accuracy of the detection result.

[0050] In some embodiments, please refer to Figures 1 to 4 , the buffer device 10 further includes a buffer exhaust pipe 13, and the buffer exhaust pipe 13 is communicated with the top of the buffer container 11, and the buffer exhaust pipe 13 is used to discharge the gas in the buffer container 11.

[0051] Here, the top of the buffer container 11 refers to more than half of the buffer container 11 in the vertical direction.

[0052] Exemplarily, the buffer exhaust pipe 13 is arranged at the highest point of the buffer container 11. In this way, it is beneficial to reduce the possibility of the liquid in the buffer container 11 entering the buffer exhaust pipe 13.

[0053] Exemplarily, the buffer exhaust pipe 13 is communicated with the inside of the buffer container 11.

[0054] In this embodiment, by arranging the buffer exhaust pipe 13 at the top of the buffer container 11, after the solution to be measured enters the buffer container 11, the air in the solution to be measured can be discharged from the buffer container 11 through the buffer exhaust pipe 13, which is beneficial to maintaining the air pressure balance in the buffer container 11, thereby facilitating the entry of the solution to be measured in the process pipeline into the buffer container 11 and reducing the air in the solution to be measured, thus improving the liquid flow stability and the accuracy of the detection result.

[0055] In some embodiments, please refer to Figures 1 to 4 , the buffer device 10 further includes an overflow pipe 14, and the overflow pipe 14 is communicated with the top of the buffer container 11 and is lower than the connection part of the buffer exhaust pipe 13 and the buffer container 11.

[0056] Here, the connection part of the overflow pipe 14 and the buffer container 11 is lower than the connection part of the buffer exhaust pipe 13 and the buffer container 11.

[0057] In this embodiment, by providing an overflow pipe 14, when the flow rate of the solution to be measured conveyed by the process pipeline is relatively large, the excessive solution to be measured will first flow out of the buffer tank through the overflow pipe 14, avoiding the situation where the solution to be measured enters the exhaust pipe upward, which is beneficial to improving the reliability of the detection system.

[0058] In some embodiments, please continue to refer to Figures 1 to 4 , the detection system further includes a return pipe 30, and one end of the overflow pipe 14 far from the buffer container 11 is connected to the process pipeline through the return pipe 30.

[0059] Exemplarily, the overflow pipe 14 extends along the height direction of the detection system, which is beneficial for the excessive solution to be measured in the buffer tank to flow downward through the overflow pipe 14.

[0060] Exemplarily, the return pipe 30 is arranged below the buffer tank, which is convenient for the excessive solution to be measured in the buffer tank to flow to the return pipe 30 through the overflow pipe 14, so as to realize the reuse of the solution to be measured, which is beneficial to avoiding the waste of the solution to be measured.

[0061] In this embodiment, by providing the return pipe 30, the excessive solution to be measured in the buffer tank flows to the return pipe 30 through the overflow pipe 14 and is returned to the process pipeline through the return pipe 30, avoiding the situation where the solution to be measured enters the exhaust pipe upward, which is beneficial to further improving the reliability of the detection system, and can realize the reuse of the solution to be measured, which is beneficial to avoiding the waste of the solution to be measured.

[0062] In some embodiments, please continue to refer to Figures 1 to 4 , the detection system further includes a cleaning pipe 50, and the cleaning pipe 50 is connected to the top of the sample container 21 and / or the buffer container 11, and the cleaning pipe 50 is used to clean the detection system.

[0063] Here, the number of the cleaning pipes 50 can be one or more.

[0064] The cleaning pipe 50 can be connected to the top of the sample container 21, or can be connected to the top of the buffer container 11, or can also be connected to the tops of the sample container 21 and the buffer container 11.

[0065] Here, the sample container 21 and / or the buffer container 11 can be cleaned through the cleaning pipe 50.

[0066] It can be understood that the solution to be measured flows in the flow path of the detection system for a long time and is easily attached to the measurement window. Since the flow path has no cleaning function and cannot clean the sample container 21 and / or the buffer container 11, it may affect the accuracy of the detection result. By cleaning the sample container 21 and / or the buffer container 11 through the cleaning pipe 50, it is beneficial to ensure the accuracy and stability of the on-line γ absorption measurement of uranium concentration during the long-term operation of the detection system.

[0067] Of course, during the process of cleaning the sample container 21 and / or the buffer container 11 by the cleaning pipe 50, the connecting pipelines of the detection system can also be cleaned.

[0068] Exemplarily, the detection system further includes a pump, and the cleaning liquid can be pumped into the cleaning pipe 50 through the pump, and the sample container 21 and / or the buffer container 11 can be cleaned through the cleaning pipe 50.

[0069] In the embodiment of the present application, by providing the cleaning pipe 50 and connecting the cleaning pipe 50 to the top of the sample container 21 and / or the buffer container 11, the cleaning of the detection system is realized, which is beneficial to further improving the accuracy of the detection result.

[0070] In some embodiments where the solution to be measured is an organic phase, the viscosity of the solution to be measured in the organic phase is relatively large. If not cleaned, it will have a greater impact on the accuracy of the detection result. In the embodiment of the present application, by providing the cleaning pipe 50, the cleaning of the detection system is realized, which is beneficial to further improving the accuracy of the detection result.

[0071] In some embodiments, please continue to refer to Figures 1 to 4 , the detection system further includes an emptying pipe 40. One end of the emptying pipe 40 is connected to the bottom of the buffer container 11, and the other end of the emptying pipe 40 is connected to the reflux pipe 30.

[0072] When the detection is stopped, the emptying pipe 40 can be opened to drain the residual solution to be measured at the bottom of the buffer container 11 into the reflux pipe 30.

[0073] In addition, by draining the residual solution to be measured at the bottom of the buffer container 11 into the reflux pipe 30, it is also beneficial to realize the cleaning of the detection system.

[0074] Exemplarily, a valve 60 is further provided on the emptying pipe 40, and the valve 60 is used to selectively conduct or cut off the emptying pipe 40.

[0075] Exemplarily, a sealing ring is further provided on the emptying pipe 40 to improve the sealing performance.

[0076] In some embodiments, please continue to refer to Figures 1 to 4 , the detection device 20 further includes a monitoring exhaust pipe 23. The monitoring exhaust pipe 23 is connected to the top of the sample container 21, and the monitoring exhaust pipe 23 is used to discharge the gas in the sample container 21.

[0077] Here, the top of the sample container 21 refers to more than half of the sample container 21 along the vertical direction.

[0078] Exemplarily, the monitoring exhaust pipe 23 is arranged at the highest point of the sample container 21. In this way, it is beneficial to reduce the possibility of the liquid in the sample container 21 entering the monitoring exhaust pipe 23.

[0079] Exemplarily, the monitoring exhaust pipe 23 is in communication with the inside of the sample container 21.

[0080] In this embodiment, by arranging the monitoring exhaust pipe 23 at the top of the sample container 21, after the solution to be measured enters the sample container 21, the air in the solution to be measured can be discharged from the sample container 21 through the monitoring exhaust pipe 23, which is beneficial to maintaining the air pressure balance in the sample container 21, thereby facilitating the entry of the solution to be measured in the buffer container 11 into the sample container 21 and reducing the air in the solution to be measured, thus improving the liquid flow stability and the accuracy of the detection result.

[0081] In some embodiments, please continue to refer to Figures 1 to 4 , the detection device 20 further includes a reflux pipe 30. The detection device 20 further includes a second connecting pipe 24 communicating with the sample container 21. One end of the second connecting pipe 24 away from the sample container 21 is connected to the process pipeline through the reflux pipe 30.

[0082] In this embodiment, by arranging the second connecting pipe 24, the solution to be measured in the sample container 21 can flow through the second connecting pipe 24 to the reflux pipe 30 and return to the process pipeline through the reflux pipe 30, avoiding the situation where the solution to be measured enters the monitoring exhaust pipe 23 upward, thereby being beneficial to further improving the reliability of the detection system and realizing the reuse of the solution to be measured, thus being beneficial to avoiding the waste of the solution to be measured.

[0083] In some embodiments, please continue to refer to Figures 1 to 4 , the detection device 20 further includes a flow meter for detecting the flow rate of the liquid in the second connecting pipe 24.

[0084] Here, by arranging the flow meter and detecting the flow rate of the liquid in the second connecting pipe 24 through the flow meter to confirm whether the flow rate requirement is met, it can be confirmed whether the solution to be measured can stably flow into the sample container 21.

[0085] Exemplarily, the flow rate of the liquid in the second connecting pipe 24 is in the range of 400 mL / min to 600 mL / min.

[0086] That is to say, the flow rate of the solution to be measured in the second connecting pipe 24 is in the range of 400 mL / min to 600 mL / min.

[0087] The flow rate of the solution to be measured in the second connecting pipe 24 can be a point value of any one of 400 mL / min, 420 mL / min, 450 mL / min, 460 mL / min, 480 mL / min, 500 mL / min, 520 mL / min, 530 mL / min, 540 mL / min, 550 mL / min, 570 mL / min, 590 mL / min, 600 mL / min or a point value between any two of them.

[0088] In this embodiment, by setting the flow rate of the liquid in the second connecting pipe 24 to be within the range of 400 mL / min to 600 mL / min, it is confirmed that the solution to be measured can stably flow into the sample container 21, thereby improving the liquid flow stability and the accuracy of the detection result.

[0089] In some embodiments, please continue to refer to Figures 1 to 4 , the detection system further includes an emptying pipe 40. One end of the emptying pipe 40 is communicated with the bottom of the sample container 21, and the other end of the emptying pipe 40 is communicated with the reflux pipe 30.

[0090] When the detection is stopped, the remaining solution to be measured at the bottom of the sample container 21 can be discharged into the reflux pipe 30 by opening the emptying pipe 40.

[0091] In addition, by discharging the remaining solution to be measured at the bottom of the sample container 21 into the reflux pipe 30, it is also beneficial to clean the detection system.

[0092] Exemplarily, the detection system includes a glove box. The buffer device 10 and the detection device 20 are arranged inside the glove box, and the glove box is used to protect the buffer device 10 and the detection device 20.

[0093] The liquid inlet of the cleaning pipe 50 is outside the glove box, and the valve 60 is used to control the switch and seal. The part placed inside the glove box is designed as a U-shaped pipe, and the water seal is used for secondary sealing.

[0094] The inlet pipe 12, the reflux pipe 30, the buffer exhaust pipe 13 and the monitoring exhaust pipe 23 are respectively welded to the corresponding process pipes introduced from the process equipment room inside the glove box.

[0095] The solution to be measured transported by the process pipeline in the nuclear fuel reprocessing process first enters the buffer container 11 through the liquid inlet pipe 12. Bubbles are removed in the buffer container 11. The buffered solution to be measured flows from the lower part of the buffer container 11 to the sample container 21 and enters the sample container 21 through the first connecting pipe 22, and then flows from the upper part of the sample container 21 through the second connecting pipe 24 to the reflux pipe 30. A monitoring exhaust pipe 23 is left at the top of the sample container 21, and it merges with the buffer exhaust pipe 13 at the top of the buffer container 11 into the exhaust pipeline. When the flow rate of the solution to be measured transported by the process pipeline is large, the solution to be measured in the buffer container 11 rises to the overflow port and is discharged through the overflow pipe 14, directly entering the reflux pipe 30, preventing the solution to be measured from overflowing into the buffer exhaust pipe 13 and the cleaning pipe 50. When the detection system needs to be cleaned, the valve 60 is opened to drain the remaining solution at the lower part of the buffer container 11, and then the valve 60 is closed. The cleaning liquid is pumped into the detection system from the cleaning pipe 50 outside the glove box by a pump to clean the sample container 21, the buffer container 11 and the connecting pipelines multiple times. Then the valve 60 is opened to drain the cleaning liquid accumulated at the lower part of the buffer container 11, and the drain pipe 40 is cleaned with the cleaning liquid to complete the cleaning of the entire detection system.

[0096] In a specific embodiment, the solution to be measured is transported into the γ absorption measurement sample container 21, and a flowmeter is used to detect the uranium concentration of the solution to be measured in the second connecting pipe 24 of the sample container 21. The flow rate of the solution to be measured is 400 mL / min, meeting the flow rate requirement, so as to confirm whether the solution to be measured can stably flow into the sample container 21. For the on-line determination of the uranium concentration in the nuclear fuel reprocessing process, the results are shown in the following table:

[0097]

[0098] The above results show that by using the detection system for uranium concentration in the nuclear fuel reprocessing process according to the embodiments of the present application, through the setting of the buffer device, the solution to be measured can be stably transported to the sample container, accurate and stable detection results can be obtained, and the error of the detection results is within the required range.

[0099] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A detection system for uranium concentration in a nuclear fuel reprocessing process, characterized in that, Comprising: A buffer device, the buffer device including a buffer container and a liquid inlet pipe, the buffer container being connected to a process pipeline through the liquid inlet pipe, and the buffer container being used for buffering a solution to be measured in the process pipeline; A detection device, the detection device including a sample container, a first connecting pipe, and a detector, the sample container being connected to the buffer container through the first connecting pipe, the sample container being used for containing the solution to be measured in the buffer container, and the detector being used for detecting the uranium concentration in the solution to be measured in the sample container.

2. The detection system according to claim 1, wherein The buffer device further includes a buffer exhaust pipe, the buffer exhaust pipe being connected to the top of the buffer container, and the buffer exhaust pipe being used for exhausting the gas in the buffer container.

3. The detection system according to claim 2, wherein, The buffer device further includes an overflow pipe, the overflow pipe being connected to the top of the buffer container and being lower than the connection of the buffer exhaust pipe to the buffer container.

4. The detection system according to claim 3, wherein The detection system further includes a return pipe, and one end of the overflow pipe away from the buffer container is connected to the process pipeline through the return pipe.

5. The detection system according to claim 4, wherein The detection system further includes a drain pipe, one end of the drain pipe being connected to the bottom of the buffer container, and the other end of the drain pipe being connected to the return pipe.

6. The detection system according to any one of claims 1 to 5, characterized in that, The detection device further includes a monitoring exhaust pipe, the monitoring exhaust pipe being connected to the top of the sample container, and the monitoring exhaust pipe being used for exhausting the gas in the sample container.

7. The detection system according to any one of claims 1 to 5, characterized in that, The detection device further includes a return pipe, and the detection device further includes a second connecting pipe connected to the sample container, and one end of the second connecting pipe away from the sample container is connected to the process pipeline through the return pipe.

8. The detection system according to claim 7, characterized in that The detection system further includes a drain pipe, one end of the drain pipe being connected to the bottom of the sample container, and the other end of the drain pipe being connected to the return pipe.

9. The detection system according to claim 7, characterized in that, The detection device further includes a flow meter, and the flow meter is used for detecting the flow rate of the liquid in the second connecting pipe.

10. The detection system according to any one of claims 1 to 5, characterized in that, The detection system further includes a cleaning pipe, the cleaning pipe being connected to the top of the sample container and / or the buffer container, and the cleaning pipe being used for cleaning the detection system.

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