Probe module based on PIPS low-background alpha and beta counter and low-background alpha and beta counter

Abstract

The utility model relates to the technical field of nuclear radiation monitoring, and provides a probe module based on PIPS low background alpha and beta counters, which comprises a probe shell, a probe shell cover, a probe ring, a PIPS detector, a preamplifier and the like. The probe shell and the cover form a copper box shielding body, the probe ring is arranged at the bottom of the shell, the PIPS detector is fixed on the probe ring through the probe pressing plate and the combined screw, and the preamplifier and the PIPS detector are integrated in the copper box shielding body so as to shorten the transmission distance. The probe ring is designed in a detachable mode and is suitable for different types of PIPS detectors. One end of the probe shell is provided with a captive screw, an aviation circular connector and a BNC coaxial connector which are respectively used for supplying power to the preamplifier and outputting signals. The module also includes a signal acquisition and processing system for receiving, processing the signal and determining a total count or activity of alpha and beta particles in the sample. The utility model also provides a low background alpha and beta counter using the probe module.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of nuclear radiation monitoring, in particular to a kind of probe module based on PIPS low background alpha, beta counter, and simultaneously relates to a kind of low background alpha, beta counter of the probe module of the application of this PIPS low background alpha, beta counter. BACKGROUND

[0002] In the field of nuclear energy utilization, especially in the operation process of pressurized water reactor nuclear power plant, the damage of reactor coolant pipe is a security risk that cannot be ignored. When such accidents occur, nuclear fission products will discharge radioactive gaseous substances through facilities such as steam generators, which include but are not limited to aerosols, iodine and inert gases. These radioactive gases are discharged into the atmosphere through the plant ventilation system, not only causing radioactive pollution to the environment, but also in the event of an accident, the leaked radioactive gaseous substances will be suspended in the surrounding air environment, entering the human body with breathing, forming serious internal irradiation, posing a great threat to the health of operators.

[0003] In addition, during the processing of nuclear fuel and nuclear waste, various gases and liquids with radioactive hazards will also be generated. In order to effectively evaluate the impact of these radioactive substances on the surrounding environment and operators, strict radioactive monitoring must be carried out. Among them, alpha particles and beta particles as the main types of radiation particles are the focus of radioactive monitoring.

[0004] However, the existing radioactive monitoring technology has some deficiencies in the design of probe module. For example, the assembly method of the probe module may not be flexible enough to meet the needs of different customers for multi-group installation expansion; moreover, the connection between the preamplifier and the detector may increase electromagnetic interference due to the excessive length of the cable, affecting the measurement efficiency and accuracy.

[0005] Therefore, it is particularly important to develop a new type of radioactive monitoring probe module that can meet the efficient and accurate measurement requirements. Utility model content

[0006] The utility model aims at providing a kind of probe module based on PIPS low background alpha, beta counter, it is designed to improve measurement efficiency, reduce electromagnetic interference by modular design, quick connection of loose screw and integrated packaging of preamplifier and detector, to realize the efficient and accurate monitoring of radioactive substances.

[0007] To solve the above technical problems, the utility model discloses a kind of probe module based on PIPS low background alpha, beta counter, comprising:

[0008] The probe shell and the probe shell cover are connected by means of a countersunk screw, and together form a copper box shielding body.

[0009] The probe ring is arranged in the copper box and is installed at the mounting hole arranged at the bottom of the probe shell.

[0010] The PIPS detector is installed on the probe ring and is fixed by means of a probe pressing plate and a combination screw.

[0011] The preamplifier is connected to the PIPS detector through a connecting line, and the preamplifier and the PIPS detector are integrated in a copper box shielding body, so as to shorten the transmission distance between the PIPS detector and the preamplifier.

[0012] In addition to the above technical features, the utility model further improves in the following aspects:

[0013] In some embodiments, the probe ring is a detachable probe ring and is arranged in multiple specifications and is suitable for PIPS detectors of different models.

[0014] In some embodiments, one end of the probe shell is provided with a detachable screw which is distributed on both sides of the one end of the probe shell and is used for fixing the probe shell and / or installing an expansion.

[0015] In some embodiments, one end of the probe shell is further provided with an aviation circular connector which is correspondingly connected to an OT socket, the aviation circular connector is connected to the preamplifier through the OT socket and is used for supplying power to the preamplifier.

[0016] In some embodiments, one end of the probe shell is provided with a BNC coaxial connector which is arranged close to the position of the aviation circular connector and is correspondingly connected to a right-angle female socket, the right-angle female socket is installed on the probe shell, the BNC coaxial connector is connected to the right-angle female socket and is used for signal output of the preamplifier.

[0017] In some embodiments, the two side edges of the probe shell are respectively extended outward to form guide sliding rails, so as to facilitate the sliding of the probe module during installation.

[0018] In some embodiments, the probe module based on the PIPS low-background alpha and beta counter further comprises a signal acquisition and processing system, the signal acquisition and processing system comprises: a signal acquisition board which is used for receiving signals processed by the preamplifier and matched in impedance; an analog-to-digital conversion module which is used for converting analog signals into digital signals; a field programmable gate array module which is used for processing the digital signals to obtain a statistical spectrum; and a computer which is used for receiving and processing spectrum data transmitted by the field programmable gate array module to determine the total count or activity of alpha and beta particles in a sample.

[0019] The utility model discloses another purpose provides a kind of low background alpha, beta counter, the probe module of low background alpha, beta counter based on PIPS described above is applied.

[0020] The probe module of low background alpha, beta counter based on PIPS provided by the utility model, compared with traditional radioactivity monitoring probe module, it brings significant technical improvement and practical application effect, it is specific in the following several aspects:

[0021] 1. improve the accuracy and sensitivity of radioactivity monitoring:

[0022] High-performance PIPS detector is adopted, and the detector has excellent energy resolution and low background characteristics, and can more accurately measure the radioactivity concentration of alpha particles and beta particles.

[0023] By integrating the preamplifier and the PIPS detector in the same copper box shielding body, electromagnetic interference is effectively reduced, the signal interference rejection capability and signal-to-noise ratio are improved, and the measurement accuracy is further improved.

[0024] 2. enhance the modular design and expansion capability:

[0025] The probe module adopts modular design, which is convenient for multi-group installation and expansion according to the needs of different customers.

[0026] Loose screw and aviation round connector and other quick connection components are used in the design, so that the connection between modules is more stable and reliable, and it is also convenient for installation and maintenance.

[0027] 3. optimize the convenience of installation and maintenance:

[0028] Guiding slide rails are designed at the edges of the probe shell, so that the installation process can be easily pushed and slid, and the installation efficiency is improved.

[0029] The probe ring is designed to be detachable, and various specifications are provided to adapt to different types of PIPS detectors, so that users can select and replace according to actual conditions.

[0030] 4. improve the efficiency and reliability of signal processing:

[0031] The short distance connection between the preamplifier and the PIPS detector reduces the loss and interference in the signal transmission process.

[0032] The signal acquisition and processing system adopts advanced analog-to-digital conversion module and field programmable gate array module, which can efficiently process digital signals and quickly obtain statistical spectrum for further analysis by computer.

[0033] In summary, the probe module based on the PIPS low background alpha, beta counter has remarkable technical advantages and practical value in the field of radioactive monitoring, and can be widely applied to nuclear power plants, nuclear fuel processing plants and other places requiring high-precision radioactive monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application.

[0035] Figure 1 It is a partial exploded view of the probe module based on the PIPS low background alpha, beta counter of the present application;

[0036] Figure 2 It is a top view of the probe module based on the PIPS low background alpha, beta counter of the present application without the probe shell cover;

[0037] Figure 3 It is a bottom view of the probe module based on the PIPS low background alpha, beta counter of the present application;

[0038] Figure 4 It is a right view of the probe module based on the PIPS low background alpha, beta counter of the present application;

[0039] Figure 5 It is a sectional view along A-A direction of the figure.

[0040] Reference signs in the drawings are as follows:

[0041] 1, probe shell; 2, probe shell cover; 3, probe pressing plate; 4, probe ring; 5, preamplifier; 6, PIPS detector; 7, connecting wire; 8, OT socket; 9, nut; 10, coaxial connector; 11, aviation round connector; 12, countersunk screw; 13, combined screw; 14, right-angle female seat. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way limiting, either explicitly or implicitly, to the present application and its applications or uses. The present application can be implemented in other different forms without departing from the spirit or essential characteristics thereof.

[0043] I. Explanation of Descriptive Language in the Present Application

[0044] The embodiments given in combination with the technical solutions of the present application are to make the present application more thorough and complete, and fully express the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified in the present application, the relative arrangement of the components set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation on the technical solutions of the present application.

[0045] In the present application, if the terms such as "up", "down", "left", "right", "bottom", "top" and the like are used, they are defined with respect to the direction in the drawings, and are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be interpreted as limiting terms.

[0046] In the present application, the terms "one", "a", "an", "the" and the like do not represent a quantity limitation, and can represent a singular or plural number. The terms "include", "contain", "have" and any variations thereof in the present application are intended to cover non-exclusive inclusion; if the present application involves the terms "first", "second", "third" and the like, they are only to distinguish similar objects, and do not represent a specific order of the objects.

[0047] In the present application, when a specific device is described to be located between a first device and a second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device. When a specific device is described to be connected to other devices, the specific device can be directly connected to the other devices without an intermediate device, or can not be directly connected to the other devices with an intermediate device.

[0048] In addition, the present application does not discuss the technology and equipment known to those skilled in the related art in detail, but under appropriate circumstances, the technology and equipment should be considered as part of the specification.

[0049] Second, the core technical problem to be solved by the technical solution of the present application

[0050] In the field of nuclear energy utilization, especially in the operation of pressurized water reactor nuclear power plants and the process of nuclear fuel and nuclear waste treatment, the monitoring of radioactive substances is crucial. However, the existing radioactive monitoring technology has obvious deficiencies in the design of the probe module.

[0051] Firstly, the assembly method of the probe module lacks flexibility, which is difficult to meet the customer demand of multiple installation expansion, and limits the application scene and range. Secondly, the connection cable between the preamplifier and the detector is too long, which not only increases the risk of electromagnetic interference, but also affects the stability and accuracy of the measurement signal, thereby reducing the overall measurement efficiency.

[0052] These problems severely restrict the performance and application effectiveness of existing technologies in radioactive monitoring. Therefore, there is an urgent need to develop a new type of probe module to solve the above-mentioned technical problems, achieve more efficient and accurate radioactive monitoring, and ensure the safety of nuclear energy utilization and the effectiveness of environmental protection.

[0053] III. Based on the above problems, this utility model provides a technical solution to solve the above problems. The technical solution, working principle and technical effect of this utility model are described in detail below with reference to specific embodiments.

[0054] like Figures 1-5 As shown, this utility model relates to a probe module based on a PIPS (Passivated Implanted Planar Silicon) low-background α and β counter. This probe module adopts a modular design, aiming to improve the efficiency and accuracy of radioactive monitoring, and is particularly suitable for monitoring radioactive gaseous substances in pressurized water reactor nuclear power plants and similar applications. The following are specific embodiments of this utility model:

[0055] 1. Structural components of the probe module

[0056] The probe module of this utility model mainly consists of the following components:

[0057] Probe housing (1) and probe housing cover (2): The probe housing (1) and probe housing cover (2) are fastened together by countersunk screws (12) to form a sealed copper box shield, which is used to reduce electromagnetic interference and protect the internal detector and preamplifier. A mounting hole is provided at the bottom of the probe housing (1) for mounting the probe ring (4).

[0058] Probe ring (4): The probe ring (4) is set inside the copper box and installed at the mounting hole at the bottom of the probe housing (1).

[0059] The probe ring (4) is detachable and available in various sizes to accommodate the installation requirements of different models of PIPS detectors (6).

[0060] PIPS detector (6): The PIPS detector (6) is mounted on the probe ring (4) and is secured by the probe clamp (3) and combination screws (13). The PIPS detector (6) is used to detect α particles and β particles in the sample.

[0061] Preamplifier (5): The preamplifier (5) is connected to the PIPS detector (6) via a connecting line (7), and the preamplifier (5) and the PIPS detector (6) are integrated in the same copper housing shield. This design shortens the transmission distance between the detector and the preamplifier, reduces transmission loss, and improves the signal's anti-interference capability and signal-to-noise ratio.

[0062] 2. Additional functions and design of the probe module

[0063] Loose screw and capacity expansion design: One end of the probe shell (1) is provided with loose screws distributed on both sides. These screws are not only used to fix the entire probe module, but also facilitate multi-group installation and capacity expansion according to customer needs, thereby improving the flexibility and applicability of the probe module.

[0064] Power supply and signal output connection: One end of the probe shell (1) is also provided with an aviation round connector (11) corresponding to the connection of an OT socket (8). The aviation round connector (11) supplies power to the preamplifier (5) through the OT socket (8).

[0065] In addition, a BNC coaxial connector (10) is arranged near the aviation round connector (11) and is connected to a right-angle female socket (14) for signal output of the preamplifier (5). This design makes the power supply and signal output more convenient and reliable.

[0066] Guiding slide rail design: The edges of the probe shell (1) are respectively extended outward to form guiding slide rails. These guiding slide rails facilitate the sliding of the probe module during installation, thereby improving the efficiency and accuracy of installation.

[0067] 3. Signal acquisition and processing system

[0068] The probe module of the utility model further comprises a signal acquisition and processing system, which is composed of the following parts:

[0069] Signal acquisition board: used for receiving signals processed and impedance matched by the preamplifier (5).

[0070] Analog-to-digital conversion module (ADC): used for converting analog signals into digital signals for subsequent digital signal processing.

[0071] Field programmable gate array module (FPGA): used for processing digital signals, including baseline estimation, amplitude extraction, filtering shaping and other algorithm processing, to obtain statistical spectrograms.

[0072] Computer: used for receiving and processing spectrogram data transmitted by the field programmable gate array module, and calculating the total count or activity of alpha and beta particles in the sample according to sample information and measurement results.

[0073] 4. Application and embodiment

[0074] The probe module of the utility model can be widely applied to the monitoring of radioactive gaseous substances in pressurized water reactor nuclear power plants and the like. For example, when a reactor coolant pipe is damaged in a nuclear power plant, nuclear fission products will discharge radioactive gaseous substances through facilities such as a steam generator. At this time, the probe module of the utility model can accurately and quickly detect alpha particles and beta particles in these radioactive substances, thereby providing important data support for evaluating the influence on the surrounding environment and avoiding harm to the operating personnel.

[0075] In the implementation, appropriate PIPS detector (6) specifications can be selected according to actual needs, and the PIPS detector (6) is installed through the detachable probe ring (4). Then, the probe module is fixed at the specified position through the non-loose screw, and power supply and signal output connection are respectively performed through the aviation circular connector (11) and the BNC coaxial connector (10). Finally, the signal acquisition and processing system is started, and the radioactive monitoring work can be started.

[0076] In summary, the probe module based on the PIPS low-background alpha and beta counter has the advantages of compact structure, reasonable design, perfect function, wide application range and the like, and can meet the high requirements of radioactive monitoring in nuclear power plants and the like.

[0077] Four, specific working principle

[0078] In combination with the above description of the structure, in order to more clearly illustrate the present application, the working principle of the probe module based on the PIPS low-background alpha and beta counter of the present application is described in detail as follows:

[0079] The utility model relates to a kind of probe module based on PIPS (Passivated Implanted Planar Silicon) low-background alpha, beta counter, and its working principle mainly revolves around the detection of radioactive particles, signal amplification and processing and data analysis. The following is the working principle of the probe module in combination with the detailed description of the reference mark:

[0080] 1, radioactive particle detection

[0081] PIPS detector working principle:

[0082] PIPS detector (6): one of the core components of the utility model, for detecting alpha particles and beta particles in sample.

[0083] When alpha particles or beta particles enter PIPS detector (6), they will interact with silicon material in the detector, generating ionization effect.

[0084] The charge signal generated by ionization effect is collected by the detector and converted into an electric pulse signal.

[0085] Probe ring and probe shell:

[0086] Probe ring (4): used to fix the PIPS detector (6) and ensure the appropriate distance between it and the sample.

[0087] Probe shell (1) and probe shell cover (2): together constitute a sealed copper box shield connected by countersunk screws (12) to protect the internal detector from external electromagnetic interference.

[0088] 2. Signal amplification and processing

[0089] The role of the preamplifier:

[0090] Preamplifier (5): tightly connected to the PIPS detector (6) through the connecting line (7) to receive the weak electric pulse signal output by the detector.

[0091] The preamplifier amplifies the received signal to improve the signal-to-noise ratio and integrates with the PIPS detector in a copper box shield to shorten the transmission distance between the PIPS detector and the preamplifier.

[0092] Signal transmission and impedance matching:

[0093] The amplified signal is transmitted to the signal acquisition and processing system through the coaxial cable to ensure impedance matching to reduce signal loss.

[0094] 3. Digital signal processing and data analysis

[0095] Signal acquisition and processing system:

[0096] Signal acquisition board: receives the signal processed by the preamplifier (5).

[0097] Analog-to-digital conversion module: converts analog signals to digital signals for subsequent digital signal processing.

[0098] Field programmable gate array module (FPGA): further processes digital signals, including baseline estimation, amplitude extraction, filter shaping, etc. Finally, the statistical spectrum is obtained.

[0099] Computer data analysis:

[0100] The computer receives and processes the spectrum data transmitted by the field programmable gate array module.

[0101] According to the sample information and measurement results, the computer calculates the total count or activity of alpha and beta particles in the sample.

[0102] 4. Overall workflow

[0103] (1) Installation and connection:

[0104] According to the actual demand, select the appropriate PIPS detector (6) specification, and install through the detachable probe ring (4).

[0105] The probe module is fixed in the designated position by means of the loose screw.

[0106] The aviation round connector (11) is connected to the preamplifier (5) through the OT socket (8) for power supply, and the BNC coaxial connector (10) is connected to the right-angle female socket (14) for signal output.

[0107] The guide slide rails are respectively formed at the two side edges of the probe shell (1) and extend outward, so that the probe module is conveniently pushed and slid during installation.

[0108] (2) Start and monitor:

[0109] Start the signal acquisition and processing system.

[0110] The PIPS detector (6) starts to detect alpha particles and beta particles in the sample and outputs an electric pulse signal.

[0111] The preamplifier (5) amplifies the signal and transmits it to the signal acquisition and processing system through the coaxial cable.

[0112] The signal acquisition and processing system performs digital signal processing on the received signal and transmits it to the computer for analysis.

[0113] The computer calculates the total count or activity of alpha and beta particles in the sample according to the processing result and displays it to the user.

[0114] In addition, the application also discloses a low-background alpha and beta counter provided with the probe module based on the PIPS low-background alpha and beta counter.

[0115] In summary, the probe module based on the PIPS low-background alpha and beta counter detects radioactive particles through the PIPS detector, amplifies the signal through the preamplifier, and performs digital processing and data analysis on the signal through the signal acquisition and processing system, so as to realize accurate monitoring of radioactive substances. This design not only improves the accuracy and efficiency of measurement, but also enhances the anti-interference ability and applicability of the equipment, and is suitable for monitoring radioactive gaseous substances in pressurized water reactor nuclear power plants and the like.

[0116] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

[0117] In addition, the technical solutions among various embodiments can be combined with each other, but must be based on that a person skilled in the art can realize; when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope required by the utility model.

Claims

1. A probe module based on PIPS low background alpha, beta counter characterized in that, It comprises: a probe shell (1) and a probe shell cover (2), which are connected by a countersunk screw (12) and together form a copper box shielding body; and a mounting hole is formed in the bottom of the probe shell (1); a probe ring (4) is arranged in the copper box and is mounted in the mounting hole formed in the bottom of the probe shell (1); a PIPS detector (6) is mounted on the probe ring (4) and is fixed by a probe pressing plate (3) and a combination screw (13); a preamplifier (5) is connected to the PIPS detector (6) through a connecting line (7), and the preamplifier (5) and the PIPS detector (6) are integrated in a copper box shielding body, so as to shorten the transmission distance between the PIPS detector and the preamplifier.

2. The PIPS low background alpha, beta counter based probe module of claim 1, wherein, The probe ring (4) is a detachable probe ring and is provided in multiple specifications to adapt to PIPS detectors (6) of different models.

3. The PIPS low background alpha, beta counter based probe module of claim 1, wherein, A loose screw is arranged at one end of the probe shell (1) and is distributed on both sides of the one end of the probe shell, for fixing the probe shell and / or installing an expansion.

4. The PIPS low background alpha, beta counter based probe module of claim 3, wherein, An aviation round connector (11) is further arranged at one end of the probe shell (1), and an OT socket (8) is correspondingly connected, the aviation round connector (11) is connected to the preamplifier (5) through the OT socket (8) for power supply of the preamplifier (5).

5. The PIPS low background alpha, beta counter based probe module of claim 3 or 4, wherein, A BNC coaxial connector (10) is arranged at one end of the probe shell (1) and close to the position where the aviation round connector (11) is arranged, and a right-angle female socket (14) is correspondingly connected, the right-angle female socket is mounted on the probe shell through a nut, and the BNC coaxial connector (10) is connected to the right-angle female socket (14) for signal output of the preamplifier (5).

6. The PIPS low background alpha, beta counter based probe module of claim 5, wherein, Guide sliding rails are respectively formed at both side edges of the probe shell (1) and extend outward, for facilitating sliding of the probe module during installation.

7. The PIPS low background alpha, beta counter based probe module of claim 1, wherein, It further comprises a signal acquisition and processing system, which comprises: a signal acquisition board for receiving signals processed by the preamplifier (5) and matched in impedance; an analog-to-digital conversion module for converting analog signals into digital signals; a field programmable gate array module for processing the digital signals to obtain a statistical spectrum; a computer for receiving and processing spectrum data transmitted by the field programmable gate array module to determine the total count or activity of alpha and beta particles in a sample.

8. A low background alpha, beta counter characterized by, The probe module based on the PIPS low-background alpha and beta counter according to any one of claims 1-7 is applied.

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