CN211979212U - Neutron critical accident monitoring and alarming instrument - Google Patents
Neutron critical accident monitoring and alarming instrument Download PDFInfo
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- CN211979212U CN211979212U CN201921943446.2U CN201921943446U CN211979212U CN 211979212 U CN211979212 U CN 211979212U CN 201921943446 U CN201921943446 U CN 201921943446U CN 211979212 U CN211979212 U CN 211979212U
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Abstract
The utility model belongs to the technical field of neutron radiation monitoring, concretely relates to critical accident monitoring of neutron and alarm instrument. The to-be-solved technical problem of the utility model is to provide a critical accident monitoring of neutron and alarm instrument, including four critical accident detectors of neutron, detector input module 5, link module 6, alarm processing module 7, communication module 8, control display module 9, through redundant power module one 10, redundant power module two 11, audible-visual alarm module 12, external information collection module 13, outside AC power supply module 14. Thereby solving the detection technology of the millisecond critical accident; the anti-interference capability of signals is improved; false alarm is avoided to the maximum extent; the online maintenance of key parts is realized, and the maintainability of equipment is improved.
Description
Technical Field
The utility model belongs to the technical field of neutron radiation monitoring, concretely relates to critical accident monitoring of neutron and alarm instrument.
Background
In the processes of nuclear fuel element production and spent fuel treatment, when the volume or mass of fissile nuclides such as uranium, plutonium and the like unexpectedly reach the critical state, critical or supercritical reaction occurs due to neutron chain reaction. This reaction rapidly releases large amounts of energy and radioactive materials, which can lead to safety incidents such as casualties, also known as critical accidents. Measures must be taken in the processes of production, processing, treatment, storage, transportation and the like of the fissile material to avoid the occurrence of critical accidents.
In view of the great and rapid development of nuclear power, the production of domestic nuclear fuel and the storage, transportation and treatment tasks of spent fuel are heavier and heavier; the equipment is listed in a nuclear safety equipment catalog, the requirement on the equipment is higher and higher, the critical accident can be accurately and reliably monitored, false alarm needs to be avoided to the maximum extent, the equipment is expected to be maintained on line, the production is not influenced, and the related technology which is not disclosed at home and abroad is not provided at present.
In view of the above, it is necessary to develop a neutron critical accident monitoring and alarming device capable of meeting the corresponding requirements.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a neutron critical accident monitoring and alarming instrument, thereby solving the detection technology of millisecond critical accidents; the anti-interference capability of signals is improved; false alarm is avoided to the maximum extent; the online maintenance of key parts is realized, and the maintainability of equipment is improved.
In order to realize the purpose, the utility model adopts the technical scheme that:
a neutron critical accident monitoring and alarming instrument comprises four neutron critical accident detectors, a detector input module 5, a link module 6, an alarm processing module 7, a system communication module 8, a control display module 9, a redundant power supply module I10, a redundant power supply module II 11, an audible and visual alarm module 12, an external information acquisition module 13 and an external alternating current power supply module 14;
the four independent neutron critical accident monitoring detectors comprise a neutron critical accident monitoring detector I1, a neutron critical accident monitoring detector II 2, a neutron critical accident monitoring detector III 3 and a neutron critical accident monitoring detector IV 4, and the four neutron critical accident detectors are independent from one another;
the neutron critical accident monitoring detector I1, the neutron critical accident monitoring detector II 2, the neutron critical accident monitoring detector III 3 and the neutron critical accident monitoring detector IV 4 respectively output measurement data and an alarm state in real time;
the detector input module 5 comprises a power output module 501, a communication isolation module 502 and an alarm isolation module 503;
the power output module 501 provides power for the first neutron critical accident monitoring detector 1, the second neutron critical accident monitoring detector 2, the third neutron critical accident monitoring detector 3 and the fourth neutron critical accident monitoring detector 4;
the communication isolation module 502 performs anti-interference preprocessing on RS485 communication signals of the neutron critical accident monitoring detector I1, the neutron critical accident monitoring detector II 2, the neutron critical accident monitoring detector III 3 and the neutron critical accident monitoring detector IV 4;
the alarm isolation module 503 processes alarm signals output by the neutron critical accident monitoring detector I1, the neutron critical accident monitoring detector II 2, the neutron critical accident monitoring detector III 3 and the neutron critical accident monitoring detector IV 4;
the communication isolation module 502 transmits the communication signal after the anti-interference preprocessing to the control display module 9 through the link module 6;
the alarm isolation module 503 transmits the processed alarm signal to the alarm processing module 7 through the link module 6, and the alarm processing module 7 outputs the alarm signal to the sound and light alarm module 12;
the control display module 9 receives the communication data output by the link module 6 and the alarm state output by the alarm processing module 7 in real time;
the control display module 9 displays and stores the data and the state monitored by the equipment in real time;
parameter setting and inquiring are carried out on a neutron critical accident monitoring detector I1, a neutron critical accident monitoring detector II 2, a neutron critical accident monitoring detector III 3 and a neutron critical accident monitoring detector IV 4 through a control display module 9;
data in the neutron critical accident monitoring and alarming instrument are isolated by a system communication module 8 in an RS485 communication mode and then output to an external information acquisition module 13;
signals and power supplies of all modules of the neutron critical accident monitoring and alarming instrument are linked through a linking module 6;
the external alternating current power supply module 14 provides stable and reliable power supply for other modules in the neutron critical accident monitoring and alarming instrument through the redundant power supply module I10 and the redundant power supply module II 11.
Furthermore, each neutron critical accident monitoring detector comprises a fast response neutron detecting element 101, a dose monitoring neutron detecting element 102, a moderator 103, a high voltage module 104, a first amplification shaping module 105, a second amplification shaping module 106, a power management module 107, a logic processing module 108, a detector communication module 109, an alarm output module 110 and a storage module 111;
the fast response neutron detection element 101, the dose monitoring neutron detection element 102 is powered by adjustable high voltage generated by the high voltage module 104 controlled by the power management module 107;
the neutron pulse signals converted by the fast response neutron detection element 101 are amplified and shaped through the first amplification and shaping module 105, the amplification factor is adjustable from 200 to 1000 times, the neutron pulse signals are finally converted into pulse signals with the amplitude being more than or equal to 1V, and fast pulse counting and slow pulse counting are completed through logic processing 108;
the neutron pulse signals converted by the neutron detection component 102 in the dose monitoring are amplified and shaped by an amplification and shaping module II 106, the amplification factor is adjustable from 200 to 1000, the neutron pulse signals are finally converted into pulse signals with the amplitude not less than 1V, and the slow pulse counting is completed by logic processing 108;
the logic processing module 108 controls the detector communication module 109 to implement RS485 communication, obtain detector information set by the case control display unit, and upload monitoring data in real time;
the detector information comprises threshold information and high-voltage information;
the information in the logic processing module 108 is stored in the storage module 111;
the high-voltage state is monitored in real time through preset high voltage and a threshold value, alarm judgment is carried out by the logic processing module 108 according to pulses output by the first amplification shaping module 105 and the second amplification shaping module 106, an alarm state is sent out when the pulse exceeds the threshold value and is output to the alarm output module 110, and the alarm state is directly output in an analog signal mode;
the pulse count of the fast response neutron detection element 101 is used as a data source for processing the low-dose neutron dose rate lower than 500 uSv/h;
the pulse count of the fast response neutron detection element 101 is combined with the pulse count of the slow response detector element 102 to serve as a data source for medium and high dose rate data processing of 500uSv/h-1 Sv/h.
Further, according to the neutron critical accident monitoring and alarming device, the fast-response neutron detection element 101 performs fast pulse detection; the dose monitoring neutron detection element 102 performs slow pulse detection.
Further, as described above, the fast response neutron detection element 101 and the dose monitoring neutron detection element 102 are neutron counter tubes, specifically, one of a boron trifluoride proportional counter tube and a helium counting tube.
Further, the neutron critical accident monitoring and alarming device comprises a fast response neutron detection element 101 and a dose monitoring neutron detection element 102 which are arranged inside a moderating body 103.
Further, according to the neutron critical accident monitoring and alarming device, the slowing-down body 103 is made of high-pressure polyethylene materials, and the thickness is determined by calculation according to an actual monitoring object.
Further, as described above, the logic processing module 108 is implemented by one of FPGA technology and 32-bit microprocessor technology.
Further, according to the neutron critical accident monitoring and alarming device, the alarm processing module 7 receives alarm signals output by the four independent neutron critical accident monitoring detectors, outputs the alarm signals when the alarm signals are larger than or equal to 2, and keeps the neutron critical accident monitoring and alarming device until the neutron critical accident monitoring and alarming device sends a reset instruction.
The technical scheme of the invention has the beneficial effects that:
the neutron critical accident monitoring and alarming instrument can monitor rapid critical accidents, accurately and rapidly sends out critical accident alarming signals, has high reliability and high accuracy, can realize the online maintenance of key equipment, and is convenient to popularize and use.
Drawings
Fig. 1 is a schematic block diagram of the detector of the present invention.
Figure 2 is the utility model discloses the critical accident monitoring of neutron and alarm instrument functional block diagram.
In the figure: a neutron critical accident monitoring detector I1, a neutron critical accident monitoring detector II 2, a neutron critical accident monitoring detector III 3, a neutron critical accident monitoring detector IV 4, a detector input module 5, a link module 6, an alarm processing module 7, a system communication module 8, a control display module 9, a redundant power supply module I10, a redundant power supply module II 11, an audible and visual alarm module 12, an external information acquisition module 13 and an external alternating current power supply module 14, the fast response neutron detection device comprises a fast response neutron detection element 101, a dose monitoring neutron detection element 102, a moderator 103, a high-voltage module 104, a first amplification shaping module 105, a second amplification shaping module 106, a power management module 107, a logic processing module 108, a detector communication module 109, an alarm output module 110, a storage module 111, a power output module 501, a communication isolation module 502 and an alarm isolation module 503.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the utility model relates to a neutron critical accident monitoring and alarming instrument, which comprises four neutron critical accident detectors, a detector input module 5, a link module 6, an alarm processing module 7, a system communication module 8, a control display module 9, a redundant power supply module I10, a redundant power supply module II 11, an audible and visual alarm module 12, an external information acquisition module 13 and an external alternating current power supply module 14;
the four independent neutron critical accident monitoring detectors comprise a neutron critical accident monitoring detector I1, a neutron critical accident monitoring detector II 2, a neutron critical accident monitoring detector III 3 and a neutron critical accident monitoring detector IV 4, and the four neutron critical accident detectors are independent from one another;
the neutron critical accident monitoring detector I1, the neutron critical accident monitoring detector II 2, the neutron critical accident monitoring detector III 3 and the neutron critical accident monitoring detector IV 4 respectively output measurement data and an alarm state in real time;
the detector input module 5 comprises a power output module 501, a communication isolation module 502 and an alarm isolation module 503;
the power output module 501 provides power for the first neutron critical accident monitoring detector 1, the second neutron critical accident monitoring detector 2, the third neutron critical accident monitoring detector 3 and the fourth neutron critical accident monitoring detector 4;
the communication isolation module 502 performs anti-interference preprocessing on RS485 communication signals of the neutron critical accident monitoring detector I1, the neutron critical accident monitoring detector II 2, the neutron critical accident monitoring detector III 3 and the neutron critical accident monitoring detector IV 4;
the alarm isolation module 503 processes alarm signals output by the neutron critical accident monitoring detector I1, the neutron critical accident monitoring detector II 2, the neutron critical accident monitoring detector III 3 and the neutron critical accident monitoring detector IV 4;
the communication isolation module 502 transmits the communication signal after the anti-interference preprocessing to the control display module 9 through the link module 6;
the alarm isolation module 503 transmits the processed alarm signal to the alarm processing module 7 through the link module 6, and the alarm processing module 7 outputs the alarm signal to the sound and light alarm module 12;
the control display module 9 receives the communication data output by the link module 6 and the alarm state output by the alarm processing module 7 in real time;
the control display module 9 displays and stores the data and the state monitored by the equipment in real time;
parameter setting and inquiring are carried out on a neutron critical accident monitoring detector I1, a neutron critical accident monitoring detector II 2, a neutron critical accident monitoring detector III 3 and a neutron critical accident monitoring detector IV 4 through a control display module 9;
data in the neutron critical accident monitoring and alarming instrument are isolated by a system communication module 8 in an RS485 communication mode and then output to an external information acquisition module 13;
signals and power supplies of all modules of the neutron critical accident monitoring and alarming instrument are linked through a linking module 6;
the external alternating current power supply module 14 provides stable and reliable power supply for other modules in the neutron critical accident monitoring and alarming instrument through the redundant power supply module I10 and the redundant power supply module II 11.
Each neutron critical accident monitoring detector comprises a fast response neutron detection element 101, a dose monitoring neutron detection element 102, a moderating body 103, a high-voltage module 104, a first amplification and shaping module 105, a second amplification and shaping module 106, a power management module 107, a logic processing module 108, a detector communication module 109, an alarm output module 110 and a storage module 111;
the fast response neutron detection element 101, the dose monitoring neutron detection element 102 is powered by adjustable high voltage generated by the high voltage module 104 controlled by the power management module 107;
the neutron pulse signals converted by the fast response neutron detection element 101 are amplified and shaped through the first amplification and shaping module 105, the amplification factor is adjustable from 200 to 1000 times, the neutron pulse signals are finally converted into pulse signals with the amplitude being more than or equal to 1V, and fast pulse counting and slow pulse counting are completed through logic processing 108;
the neutron pulse signals converted by the neutron detection component 102 in the dose monitoring are amplified and shaped by an amplification and shaping module II 106, the amplification factor is adjustable from 200 to 1000, the neutron pulse signals are finally converted into pulse signals with the amplitude not less than 1V, and the slow pulse counting is completed by logic processing 108;
the logic processing module 108 controls the detector communication module 109 to implement RS485 communication, obtain detector information set by the case control display unit, and upload monitoring data in real time;
the detector information comprises threshold information and high-voltage information;
the information in the logic processing module 108 is stored in the storage module 111;
the high-voltage state is monitored in real time through preset high voltage and a threshold value, alarm judgment is carried out by the logic processing module 108 according to pulses output by the first amplification shaping module 105 and the second amplification shaping module 106, an alarm state is sent out when the pulse exceeds the threshold value and is output to the alarm output module 110, and the alarm state is directly output in an analog signal mode;
the pulse count of the fast response neutron detection element 101 is used as a data source for processing the low-dose neutron dose rate lower than 500 uSv/h;
the pulse count of the fast response neutron detection element 101 is combined with the pulse count of the slow response detector element 102 to serve as a data source for medium and high dose rate data processing of 500uSv/h-1 Sv/h;
the fast response neutron detection element 101 performs fast pulse detection;
the dose monitoring neutron detection element 102 performs slow pulse detection;
the fast response neutron detection element 101 and the dose monitoring neutron detection element 102 are neutron counting tubes, and are specifically one of boron trifluoride proportional counting tubes and helium triple counting tubes;
a fast response neutron detection element 101, a dose monitoring neutron detection element 102 is arranged inside the moderating body 103;
the slowing-down body 103 is made of high-pressure polyethylene material, and the thickness is calculated and determined according to an actual monitoring object;
the logic processing module 108 is implemented by one of FPGA technology and 32-bit microprocessor technology;
and the alarm processing module 7 is used for receiving the alarm signals output by the four independent neutron critical accident monitoring detectors, outputting the alarm signals when the alarm signals are more than or equal to 2, and keeping the alarm signals until the neutron critical accident monitoring and alarm instrument sends a reset instruction.
Claims (10)
1. The utility model provides a critical accident monitoring of neutron and alarm instrument which characterized in that:
the system comprises four neutron critical accident detectors, a detector input module (5), a link module (6), an alarm processing module (7), a system communication module (8), a control display module (9), a redundancy power supply module I (10), a redundancy power supply module II (11), an audible and visual alarm module (12), an external information acquisition module (13) and an external alternating current power supply module (14);
the four independent neutron critical accident monitoring detectors comprise a neutron critical accident monitoring detector I (1), a neutron critical accident monitoring detector II (2), a neutron critical accident monitoring detector III (3) and a neutron critical accident monitoring detector IV (4), and the four neutron critical accident detectors are independent from one another;
the method comprises the following steps that a first neutron critical accident monitoring detector (1), a second neutron critical accident monitoring detector (2), a third neutron critical accident monitoring detector (3) and a fourth neutron critical accident monitoring detector (4) respectively output measurement data and an alarm state in real time;
the detector input module (5) comprises a power output module (501), a communication isolation module (502) and an alarm isolation module (503);
the power output module (501) provides power for the neutron critical accident monitoring detector I (1), the neutron critical accident monitoring detector II (2), the neutron critical accident monitoring detector III (3) and the neutron critical accident monitoring detector IV (4);
the communication isolation module (502) performs anti-interference preprocessing on RS485 communication signals of the neutron critical accident monitoring detector I (1), the neutron critical accident monitoring detector II (2), the neutron critical accident monitoring detector III (3) and the neutron critical accident monitoring detector IV (4);
the alarm isolation module (503) processes alarm signals output by the neutron critical accident monitoring detector I (1), the neutron critical accident monitoring detector II (2), the neutron critical accident monitoring detector III (3) and the neutron critical accident monitoring detector IV (4);
the communication isolation module (502) transmits the communication signals subjected to the anti-interference preprocessing to the control display module (9) through the link module (6);
the alarm isolation module (503) transmits the processed alarm signal to the alarm processing module (7) through the link module (6), and the alarm processing module (7) outputs the alarm signal to the sound-light alarm module (12);
the control display module (9) receives the communication data output by the link module (6) and the alarm state output by the alarm processing module (7) in real time;
the control display module (9) displays and stores the data and the state monitored by the equipment in real time;
parameter setting and inquiring are carried out on a neutron critical accident monitoring detector I (1), a neutron critical accident monitoring detector II (2), a neutron critical accident monitoring detector III (3) and a neutron critical accident monitoring detector IV (4) through a control display module (9);
data in the neutron critical accident monitoring and alarming instrument are isolated by a system communication module (8) in an RS485 communication mode and then output to an external information acquisition module (13);
signals and power supply of each module of the neutron critical accident monitoring and alarming instrument are linked through a linking module (6);
the external alternating current power supply module (14) provides a stable and reliable power supply for other modules in the neutron critical accident monitoring and alarming instrument through the redundant power supply module I (10) and the redundant power supply module II (11).
2. The neutron threshold accident monitoring and warning device of claim 1, wherein: each neutron critical accident monitoring detector comprises a fast response neutron detection element (101), a dose monitoring neutron detection element (102), a moderating body (103), a high voltage module (104), a first amplification and shaping module (105), a second amplification and shaping module (106), a power supply management module (107), a logic processing module (108), a detector communication module (109), an alarm output module (110) and a storage module (111);
the fast response neutron detection element (101), the dose monitoring neutron detection element (102) is controlled by the power management module (107) to generate adjustable high-voltage power supply by the high-voltage module (104);
the neutron pulse signals converted by the fast response neutron detection element (101) are amplified and shaped by an amplification and shaping module I (105), the amplification factor is adjustable from 200 to 1000 times, the neutron pulse signals are finally converted into pulse signals with the amplitude being more than or equal to 1V, and fast pulse counting and slow pulse counting are completed by logic processing 108;
the neutron pulse signals converted by the dose monitoring neutron detection element (102) are amplified and shaped by an amplification and shaping module II (106), the amplification factor is adjustable from 200 to 1000, the neutron pulse signals are finally converted into pulse signals with the amplitude not less than 1V, and the slow pulse counting is completed by logic processing 108;
the logic processing module (108) controls the detector communication module (109) to implement RS485 communication, so that detector information set by the case control display unit is obtained, and monitoring data are uploaded in real time;
the detector information comprises threshold information and high-voltage information;
the information in the logic processing module (108) is stored in the storage module (111) partially;
the high-voltage state is monitored in real time through preset high voltage and a threshold value, the logic processing module (108) performs alarm judgment according to pulses output by the first amplification shaping module (105) and the second amplification shaping module (106), an alarm state is sent when the pulse exceeds the threshold value, the alarm state is output to the alarm output module (110), and the alarm state is directly output in an analog signal mode;
counting the pulses of the fast response neutron detection element (101) as a data source for processing at a low dose neutron dose rate lower than 500 uSv/h;
the pulse count of the fast response neutron detection element (101) is combined with the pulse count of the slow response detector element 102 to serve as a data source for the medium and high dose rate data processing of 500uSv/h-1 Sv/h.
3. The neutron threshold accident monitoring and warning device of claim 2, wherein:
the fast response neutron detection element (101) performs fast pulse detection;
the dose monitoring neutron detection element (102) performs slow pulse detection.
4. The neutron threshold accident monitoring and warning device of claim 3, wherein:
the fast response neutron detection element (101) and the dose monitoring neutron detection element (102) are neutron counting tubes, and are specifically one of boron trifluoride proportional counting tubes and helium triple counting tubes.
5. The neutron threshold accident monitoring and warning device of claim 3, wherein: the fast response neutron detection element (101) and the dose monitoring neutron detection element (102) are arranged inside the moderating body (103).
6. The neutron threshold accident monitoring and warning device of claim 3, wherein:
the slowing-down body (103) is made of high-pressure polyethylene material, and the thickness is determined by calculation according to an actual monitoring object.
7. The neutron threshold accident monitoring and warning device of claim 3, wherein: the logic processing module (108) is implemented by one of FPGA technology, 32-bit microprocessor technology.
8. The neutron threshold accident monitoring and warning device of claim 2, wherein:
the fast response neutron detection element (101) performs fast pulse detection;
the dose monitoring neutron detection element (102) performs slow pulse detection;
the fast response neutron detection element (101) and the dose monitoring neutron detection element (102) are neutron counting tubes, and specifically are one of boron trifluoride proportional counting tubes and helium triple counting tubes;
the fast response neutron detection element (101), the dose monitoring neutron detection element (102) is placed in the moderating body (103);
the slowing-down body (103) is made of high-pressure polyethylene material, and the thickness is calculated and determined according to an actual monitoring object;
the logic processing module (108) is implemented by one of FPGA technology, 32-bit microprocessor technology.
9. The neutron threshold accident monitoring and warning device of claim 1, wherein: and the alarm processing module (7) receives the alarm signals output by the four independent neutron critical accident monitoring detectors, outputs the alarm signals when the alarm signals are more than or equal to 2, and keeps the alarm signals until the neutron critical accident monitoring and alarming instrument sends a reset instruction.
10. The neutron threshold accident monitoring and warning device of claim 1, wherein:
each neutron critical accident monitoring detector comprises a fast response neutron detection element (101), a dose monitoring neutron detection element (102), a moderating body (103), a high voltage module (104), a first amplification and shaping module (105), a second amplification and shaping module (106), a power supply management module (107), a logic processing module (108), a detector communication module (109), an alarm output module (110) and a storage module (111);
the fast response neutron detection element (101), the dose monitoring neutron detection element (102) is controlled by the power management module (107) to generate adjustable high-voltage power supply by the high-voltage module (104);
the neutron pulse signals converted by the fast response neutron detection element (101) are amplified and shaped by an amplification and shaping module I (105), the amplification factor is adjustable from 200 to 1000 times, the neutron pulse signals are finally converted into pulse signals with the amplitude being more than or equal to 1V, and fast pulse counting and slow pulse counting are completed by logic processing 108;
the neutron pulse signals converted by the dose monitoring neutron detection element (102) are amplified and shaped by an amplification and shaping module II (106), the amplification factor is adjustable from 200 to 1000, the neutron pulse signals are finally converted into pulse signals with the amplitude not less than 1V, and the slow pulse counting is completed by logic processing 108;
the logic processing module (108) controls the detector communication module (109) to implement RS485 communication, so that detector information set by the case control display unit is obtained, and monitoring data are uploaded in real time;
the detector information comprises threshold information and high-voltage information;
the information in the logic processing module (108) is stored in the storage module (111) partially;
the high-voltage state is monitored in real time through preset high voltage and a threshold value, the logic processing module (108) performs alarm judgment according to pulses output by the first amplification shaping module (105) and the second amplification shaping module (106), an alarm state is sent when the pulse exceeds the threshold value, the alarm state is output to the alarm output module (110), and the alarm state is directly output in an analog signal mode;
counting the pulses of the fast response neutron detection element (101) as a data source for processing at a low dose neutron dose rate lower than 500 uSv/h;
the pulse count of the fast response neutron detection element (101) is combined with the pulse count of the slow response detector element 102 to serve as a data source for the medium and high dose rate data processing of 500uSv/h-1 Sv/h;
the fast response neutron detection element (101) performs fast pulse detection;
the dose monitoring neutron detection element (102) performs slow pulse detection;
the fast response neutron detection element (101) and the dose monitoring neutron detection element (102) are neutron counting tubes, and specifically are one of boron trifluoride proportional counting tubes and helium triple counting tubes;
the fast response neutron detection element (101), the dose monitoring neutron detection element (102) is placed in the moderating body (103);
the slowing-down body (103) is made of high-pressure polyethylene material, and the thickness is calculated and determined according to an actual monitoring object;
the logic processing module (108) is implemented by one of FPGA technology and 32-bit microprocessor technology;
and the alarm processing module (7) receives the alarm signals output by the four independent neutron critical accident monitoring detectors, outputs the alarm signals when the alarm signals are more than or equal to 2, and keeps the alarm signals until the neutron critical accident monitoring and alarming instrument sends a reset instruction.
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| CN112907914A (en) * | 2021-02-09 | 2021-06-04 | 陕西卫峰核电子有限公司 | Nuclear criticality alarm system and alarm method thereof |
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| CN112907914A (en) * | 2021-02-09 | 2021-06-04 | 陕西卫峰核电子有限公司 | Nuclear criticality alarm system and alarm method thereof |
| CN112907914B (en) * | 2021-02-09 | 2022-01-25 | 陕西卫峰核电子有限公司 | Nuclear criticality alarm system and alarm method thereof |
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