CN107884810A - A kind of personal dose alarm of neutron detection device and the application device - Google Patents
A kind of personal dose alarm of neutron detection device and the application device Download PDFInfo
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- CN107884810A CN107884810A CN201711205365.8A CN201711205365A CN107884810A CN 107884810 A CN107884810 A CN 107884810A CN 201711205365 A CN201711205365 A CN 201711205365A CN 107884810 A CN107884810 A CN 107884810A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
- G01T3/06—Measuring neutron radiation with scintillation detectors
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Abstract
The present invention relates to a kind of neutron personal dose alarm, neutron dose value is calculated using the method for detection scattered neutron and incident neutron ratio, including neutron detection device as described in the present invention, the processor being connected with the detection device, and power supply, display screen, LED light, buzzer, memory, Infrared Transmission and the function keyboard being connected respectively with processor.Described neutron detection device, including detection system A, detection system B and thermal neutron shield；Wherein detection system A is identical with detection system B；Thermal neutron shield is used for the thermal neutron for absorbing incidence, is designed to hat-shaped；Detection system A is placed on the outside of thermal neutron shield, and for detecting the slow neutron of incidence, detection system B is placed on the inside of thermal neutron shield, for detecting the neutron of human body reflection.Using neutron personal dose's alarm small volume of this method, operating voltage is low, and anti-electromagnetic interference capability is strong, can be in high humidity environment long-term work.
Description
Technical field
The present invention relates to technical field of nuclear radiation measurement, and in particular to of a kind of neutron detection device and the application device
People's dosage alarm.
Background technology
Neutron personal dose's alarm is mainly used in being engaged in personal dose prison of the Radial-stricken Workers in Nuclear Industry as neutron ray
Survey and use, remind person works' environmental neutron dosage whether exceeded, if safeguard procedures should be taken.Neutron personal dose's alarm
With superthreshold alarm, reading is directly perceived, miniaturization, it is easy to carry the characteristics of.
Neutron dose measurement is a rareer problem, and the neutron fluence of thermal neutron to 15MeV energy sections turns to dosage
Change more complicated, different energy response adjusting meanss is used in portable instrument.By adjusting means, the numerical value of measurement is set to exist
Section and dose proportional all can be measured.But personal dose's alarm requires higher, relatively large energy to volume, weight, Realtime Alerts
Ringing adjusting means can not be applicable herein.At present6LiF、7LiF Thermoluminescence datings are in respect of preferable energy response, but thermoluminescence is nothing
Source element, data can not be directly read, and not possess warning function.
At present, both at home and abroad for neutron personal dose's alarm detector have silicon semiconductor detector and6LiI (Eu) dodges
Bright body etc..Silicon semiconductor detector uses nuclear reaction layer of the covering containing lithium or containing B on semi-conducting material,6LiI (Eu) contains and heat
Neutron reaction6Li nucleic.Two kinds of detectors use nuclear reaction method, are thermal-neutron detector.Due to being subject to many limitations, mesh
Preceding neutron personal dose alarm is only preferable to thermal neutron or a certain section of neutron response, and it is poor all can to measure section neutron response.
The content of the invention
It is an object of the invention to：The problem of for neutron personal dose alarm energy response difference at this stage, propose one
Kind of energy response is good, error is small, gamma rejection is high, can Realtime Alerts neutron personal dose's alarm.
Technical scheme is as follows：
A kind of neutron detection device, including detection system A, detection system B and thermal neutron shield；Wherein detection system A
It is identical with detection system B；Thermal neutron shield is used for the thermal neutron for absorbing incidence, is designed to hat-shaped；Detection system A
It is placed on the outside of thermal neutron shield, for detecting the slow neutron of incidence, detection system B is placed on the inside of thermal neutron shield, is used for
Detect the neutron of human body reflection.
The material of described thermal neutron shield selects the big material in neutron absorption cross-section.
The detection system A includes two parts, and a part is by opacus outer after slow neutron detector is connected with photoelectric device
Shell wraps up, and another part is to be wrapped up after gamma detector is connected with photoelectric device by opacus shell；Two-part photoelectric device difference
It is connected by output line with the external world.
Described slow neutron detector, for detecting slow neutron, the detector is to neutron-sensitive, while also to gamma ray
It is sensitive；Described gamma detector is only sensitive to gamma ray.
The profile of described opacus shell and slow neutron detector and gamma detector is adapted, for prevent external interference and
Lucifuge.
Described photoelectric device converts optical signals into electric signal and signal is handled；Slow neutron detector or γ are visited
Survey the light gasing surface of device and the sensitive volume of photoelectric device and pass through optical coupled dose of connection.
The slow neutron detector is6LiI (Eu) scintillator, gamma detector are7LiI (Eu) scintillator.
The slow neutron detector is6Li glass scintillators, gamma detector are7Li glass scintillators.
A kind of neutron personal dose alarm, neutron agent is calculated using the method for detection scattered neutron and incident neutron ratio
Value, including neutron detection device as described in the present invention, the processor being connected with the detection device, and respectively with place
Power supply, display screen, LED light, buzzer, memory, Infrared Transmission and the function keyboard that reason device is connected.
The remarkable result of the present invention is：
1) energy response performance is improved, reduces measurement error.Neutron dose is calculated using albedo is detected, makes neutron personal
Dosage alarm has good energy response, and substantially reduces its measurement error.
2) gamma rejection is improved.Using gamma compensated type combinations of detectors, one of scintillator is to neutron and gal
Horse is sensitive, and another scintillator is only sensitive to gamma, and Gama Count is fallen in compensation, can draw the actual count of neutron, arrange well
Except interference of the gamma to measurement result.
3) neutron personal dose's alarm small volume of this method is utilized, operating voltage is low, and anti-electromagnetic interference capability is strong, energy
In high humidity environment long-term work.
Brief description of the drawings
Fig. 1 is panel detector structure schematic diagram；
Fig. 2 is detection system schematic diagram；
Fig. 3 is neutron personal dose's alarm system schematic；
In figure：1. detection system A, 2. detection system B, 3. thermal neutron shields, 4. slow neutron detectors, 5. γ are detected
Device, 6. opacus shells, 7. photoelectric devices, 8. processors, 9. power supplys, 10. display screens, 11.LED indicator lamps, 12. buzzers, 13.
Memory, 14. Infrared Transmissions, 15. function keyboards.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is to a kind of neutron detection device of the present invention and using the device
Personal dose's alarm is described in further detail.
Fig. 1 is a kind of neutron detection device of the present invention, including detection system A1, detection system B2 and thermal neutron screen
Cover body 3；Wherein detection system A1 is identical with detection system B2；Thermal neutron shield 3 is used for the thermal neutron for absorbing incidence, is
Hat-shaped；Detection system A1 is placed in the outside of thermal neutron shield 3, and for detecting the slow neutron of incidence, detection system B2 is placed in
The inner side of thermal neutron shield 3, for detecting the neutron of human body reflection.
The material of described thermal neutron shield 3 selects the big material in neutron absorption cross-section, and preferably boron or cadmium, thickness is
4-15mm。
As shown in Fig. 2 the detection system A1 includes two parts, a part is slow neutron detector 4 and the phase of photoelectric device 7
Wrapped up after even by opacus shell 6, another part is to be wrapped up after gamma detector 5 is connected with photoelectric device 7 by opacus shell 6；Two
The photoelectric device 7 divided is connected by output line with the external world respectively.
Described slow neutron detector 4, for detecting slow neutron, the detector is also penetrated to neutron-sensitive to gamma
Line is sensitive；Described gamma detector 5 is only sensitive to gamma ray, and described slow neutron detector 4 is that structure is complete with gamma detector 5
Exactly the same square, length of side 2mm-20mm.
The profile of described opacus shell 6 and slow neutron detector 4 and gamma detector 5 is adapted, extraneous dry for preventing
Disturb and lucifuge；The opacus shell 6 is preferably aluminum hull.
Described photoelectric device 7 converts optical signals into electric signal and signal is handled；Slow neutron detector 4 or γ
The light gasing surface of detector 5 is connected with the sensitive volume of photoelectric device 7 by optical coupled dose；Photoelectric device 7 is preferably silicon photoelectricity
Diode；The sensitive volume of silicon photoelectric diode is consistent with the light gasing surface size of detector.
The slow neutron detector 4 is6LiI (Eu) scintillator, gamma detector 5 are7LiI (Eu) scintillator.
The slow neutron detector 4 is6Li glass scintillators, gamma detector 5 are7Li glass scintillators.
As shown in figure 3, a kind of neutron personal dose alarm, using the method for detection scattered neutron and incident neutron ratio
Calculating neutron dose value, including neutron detection device of the present invention, the processor 8 being connected with the detection device, with
And be connected respectively with processor 8 power supply 9, display screen 10, LED light 11, buzzer 12, memory 13, Infrared Transmission
14 and function keyboard 15.
The operation principle of neutron detection device of the present invention：Detection system A1 is used for the slow thermal neutron for detecting direct incidence
That is incident neutron, thermal neutron screen layer can be used to sponge the slow thermal neutron of incidence；Detection system B2 is used to detect the fast of incidence
Neutron is with after tissue interaction, leaving the neutron i.e. scattered neutron that human body scatters out.Scattered neutron and incident neutron
Ratio it is related to neutron energy, neutron energy again it is related to neutron dose value；, can be by scattered neutron and incidence by demarcation
The ratio of neutron and counting, calculate neutron dose；The dose value has preferable sound for the incident neutron of whole energy sections
Should.
Detection system A1 and detection system B2 realizes detection neutron using γ penalty methods.Neutron Radiation Field is typically all neutron
With the mixing field of gamma ray, and neutron detector has certain sensitivity to gamma ray.Compensation is taken to arrange in the present invention
The interference for eliminating gamma ray is applied, specially using two detectors, one of them is that neutron, the sensitive slow neutron of gamma are visited
Device 4 is surveyed, another is that only, by the count difference value of two detectors, can draw neutron gauges to the sensitive gamma detector of gamma 5
Number.
Claims (9)
- A kind of 1. neutron detection device, it is characterised in that：Including detection system A (1), detection system B (2) and thermal neutron shield (3)；Wherein detection system A (1) is identical with detection system B (2)；Thermal neutron shield (3) is used to absorb hankering for incidence Son, it is designed to hat-shaped；Detection system A (1) is placed on the outside of thermal neutron shield (3), for detecting the slow neutron of incidence, is visited Examining system B (2) is placed on the inside of thermal neutron shield (3), for detecting the neutron of human body reflection.
- A kind of 2. neutron detection device as claimed in claim 1, it is characterised in that：The material of described thermal neutron shield (3) The big material in material selection neutron absorption cross-section.
- A kind of 3. neutron detection device as claimed in claim 1, it is characterised in that：The detection system A (1) includes two Point, a part is wrapped up after being connected for slow neutron detector (4) with photoelectric device (7) by opacus shell (6), and another part is visited for γ Survey after device (5) is connected with photoelectric device (7) and wrapped up by opacus shell (6)；Two-part photoelectric device (7) passes through output line respectively It is connected with the external world；Described slow neutron detector (4) and gamma detector (5) are completely identical in structure square, and the length of side is 2mm-20mm 。
- A kind of 4. neutron detection device as claimed in claim 3, it is characterised in that：Described slow neutron detector (4), is used for Slow neutron is detected, the detector is sensitive to gamma ray to neutron-sensitive, while also；Described gamma detector (5) is only to gamma Ray is sensitive.
- A kind of 5. neutron detection device as claimed in claim 3, it is characterised in that：Described opacus shell (6) and slow neutron The profile of detector (4) and gamma detector (5) is adapted, for preventing external interference and improving the light collection efficiency of scintillator.
- A kind of 6. neutron detection device as claimed in claim 3, it is characterised in that：Described photoelectric device (7) is by optical signal It is converted into electric signal and signal is handled；The light gasing surface and photoelectric device of slow neutron detector (4) or gamma detector (5) (7) sensitive volume passes through optical coupled dose of connection.
- A kind of 7. neutron detection device as claimed in claim 3, it is characterised in that：The slow neutron detector (4) is6LiI (Eu) scintillator, gamma detector (5) are7LiI (Eu) scintillator.
- A kind of 8. neutron detection device as claimed in claim 3, it is characterised in that：The slow neutron detector (4) is6Li glass Glass scintillator, gamma detector (5) are7Li glass scintillators.
- A kind of 9. neutron personal dose alarm, it is characterised in that：Using the method for detection scattered neutron and incident neutron ratio Calculate neutron dose value, including neutron detection device as claimed in claim 1, the processor being connected with the detection device (8) power supply (9) that, and is respectively connected with processor (8), display screen (10), LED light (11), buzzer (12), deposit Reservoir (13), Infrared Transmission (14) and function keyboard (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711205365.8A CN107884810A (en) | 2017-11-27 | 2017-11-27 | A kind of personal dose alarm of neutron detection device and the application device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711205365.8A CN107884810A (en) | 2017-11-27 | 2017-11-27 | A kind of personal dose alarm of neutron detection device and the application device |
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| CN107884810A true CN107884810A (en) | 2018-04-06 |
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| CN201711205365.8A Pending CN107884810A (en) | 2017-11-27 | 2017-11-27 | A kind of personal dose alarm of neutron detection device and the application device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113096836A (en) * | 2021-03-30 | 2021-07-09 | 陕西卫峰核电子有限公司 | Neutron detection system and installation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206967U (en) * | 1987-05-04 | 1988-03-30 | 首都钢铁公司 | Probe for neutron water measuting instrument |
| CN106328218A (en) * | 2016-11-10 | 2017-01-11 | 北京凯佰特科技股份有限公司 | Reactor control system for hospital neutron irradiator |
-
2017
- 2017-11-27 CN CN201711205365.8A patent/CN107884810A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206967U (en) * | 1987-05-04 | 1988-03-30 | 首都钢铁公司 | Probe for neutron water measuting instrument |
| CN106328218A (en) * | 2016-11-10 | 2017-01-11 | 北京凯佰特科技股份有限公司 | Reactor control system for hospital neutron irradiator |
Non-Patent Citations (2)
| Title |
|---|
| 汲长松: "《中子探测》", 31 May 2014 * |
| 汲长松等: "JR-1104型6LiF、7LiF热释光反照中子剂量计标定实验", 《核电子学与探测技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113096836A (en) * | 2021-03-30 | 2021-07-09 | 陕西卫峰核电子有限公司 | Neutron detection system and installation method thereof |
| CN113096836B (en) * | 2021-03-30 | 2022-03-01 | 陕西卫峰核电子有限公司 | Neutron detection system and installation method thereof |
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Application publication date: 20180406 |