CN203616482U - Measuring system for detection efficiency of airbone radioactive iodine measuring instrument - Google Patents
Measuring system for detection efficiency of airbone radioactive iodine measuring instrument Download PDFInfo
- Publication number
- CN203616482U CN203616482U CN201320811494.2U CN201320811494U CN203616482U CN 203616482 U CN203616482 U CN 203616482U CN 201320811494 U CN201320811494 U CN 201320811494U CN 203616482 U CN203616482 U CN 203616482U
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- CN
- China
- Prior art keywords
- iodine
- detection efficiency
- measuring system
- collector
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 60
- 239000011630 iodine Substances 0.000 title claims abstract description 60
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 230000002285 radioactive effect Effects 0.000 title abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 15
- XMBWDFGMSWQBCA-RNFDNDRNSA-M iodine-131(1-) Chemical compound [131I-] XMBWDFGMSWQBCA-RNFDNDRNSA-M 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 230000005251 gamma ray Effects 0.000 claims description 9
- 229910052732 germanium Inorganic materials 0.000 claims description 9
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000004611 spectroscopical analysis Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005070 sampling Methods 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 description 7
- 230000004992 fission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PNDPGZBMCMUPRI-HVTJNCQCSA-N 10043-66-0 Chemical compound [131I][131I] PNDPGZBMCMUPRI-HVTJNCQCSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a measuring system for detection efficiency of an airbone radioactive iodine measuring instrument. The measuring system can scales and detects detection efficiency of an airbone radioactive iodine measuring instrument accurately. The technical scheme is that, scale and detection are carried out by utilization of radioactive iodine volume activity reference standards to measure detection efficiency of an airbone radioactive iodine measuring instrument. Through determination of generation, storage and sampling of gaseous iodine and measuring standards, quantitative measurement of the detection efficiency of the airbone radioactive iodine measuring instrument can be achieved.
Description
Technical field
The utility model relates to a kind of instrument measure of effectiveness system, relates in particular to the measuring system of the detection efficiency to Airborne Radioiodine surveying instrument.
Background technology
Nuclear safety is the prerequisite that nuclear industry develops in a healthy way, the safe operation of nuclear reactor is the most important thing of guaranteeing nuclear safety, nuclear power station heat island inside and the monitoring of surrounding enviroment fission products, and radioactivity monitoring to recirculated water, be ruuning situation on nuclear reactor, surrounding enviroment and the public's impact made to one of important evidence of assessing.
Iodine-131 nucleic is one of main fission products.The radioactive isotope of iodine has
125i,
129i,
131i, the Airborne Radioiodine in nuclear power station gaseous effluent stream or ambient atmosphere is mainly
131i, comprises iodine and the organic iodine of gaseous state, particulate.
The monitoring of Airborne Radioiodine is that nuclear facilities and surrounding enviroment fission products thereof are monitored one of indispensable means, is also an important content of radiation environmental monitoring.
In atmosphere, the monitoring of radioiodine has two kinds of methods, and the one, adopt Airborne Radioiodine surveying instrument to carry out real time on-line monitoring, the 2nd, with after air sampler sampling, sampling filter paper being done to spectral measurement.
The collector of Airborne Radioiodine filter screen, active carbon filter paper and iodine box (activated-carbon filter box) composition for surveying instrument carries out continuous acquisition, and semiconductor detector is measured in real time to collector.
Counting rate after instrument deduction background obtains activity measurement value divided by detection efficiency, is obtained the cumulative volume of sampled air by the product of sampling flow and time, and activity measurement value and the ratio of sampled air volume are sampled air
131i nucleic volume activity.
Visible, accurate calibration Airborne Radioiodine surveying instrument detection efficiency is to ensure monitoring result gordian technique accurately.
Utility model content
The purpose of this utility model is to address the above problem, and a kind of measuring system of detection efficiency of Airborne Radioiodine surveying instrument is provided, can accurate calibration and the detection efficiency that detects Airborne Radioiodine surveying instrument.
The technical solution of the utility model is:
The utility model has disclosed a kind of measuring system of detection efficiency of Airborne Radioiodine surveying instrument, comprise iodine generation and acquisition subsystem and detection efficiency measurement subsystem, wherein iodine generation and acquisition subsystem further comprise reaction vessel, iodine chamber and iodine collector, reaction vessel is all connected with iodine chamber with iodine collector, detection efficiency measurement subsystem further comprises connected successively high purity germanium detector, prime amplifier, Spectroscopy amplifier, digitizing gamma ray spectrometer, multiple tracks buffer memory and interface and computing machine, wherein the input end of high purity germanium detector connects the output terminal of iodine collector, high purity germanium detector is connected with high-voltage power supply with prime amplifier.
According to an embodiment of the measuring system of the detection efficiency of Airborne Radioiodine surveying instrument of the present utility model, iodine collector is combined by filter screen, active carbon filter paper and filter box.
According to an embodiment of the measuring system of the detection efficiency of Airborne Radioiodine surveying instrument of the present utility model, iodine chamber is that an inner chamber is horizontal closed container cylindraceous, electric heating temperature control device is installed in cavity, and the both sides that are plane are provided with view window and thief hatch.
The utility model contrast prior art has following beneficial effect: scheme of the present utility model is to adopt radioiodine volume activity to carry out scale and the detection efficiency detecting to measure Airborne Radioiodine surveying instrument with reference to mark.By the generation to gaseous iodine, storage and sampling and to the determining of measurement standard, make the detection efficiency of Airborne Radioiodine surveying instrument be quantized measurement.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the preferred embodiment of the measuring system of the detection efficiency of Airborne Radioiodine surveying instrument of the present utility model.
Fig. 2 shows the structural drawing of iodine generation of the present utility model and acquisition subsystem.
Fig. 3 shows the schematic diagram of iodine collector of the present utility model.
Fig. 4 shows the structural representation of iodine of the present utility model chamber.
Fig. 5 shows the structural drawing of detection efficiency measurement subsystem of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 shows the principle of the preferred embodiment of the measuring system of the detection efficiency of Airborne Radioiodine surveying instrument of the present utility model.Refer to Fig. 1, the measuring system of the present embodiment comprises that iodine produces and acquisition subsystem 1 and detection efficiency measurement subsystem 2.
The principle of the measuring system of the present embodiment is: with Na
131i solution and and Fe
2(SO
4)
3reaction produces
131i
2, with Fe
2(SO
4)
3reaction produces I
2, distilling as inputting reservoir vessel " iodine chamber " after gaseous state, the mode with iodine collector with simulated atmosphere sampling gathers gaseous state and aerosolized from iodine chamber
131i nucleic, in HpGe gamma ray spectrometer Accurate Determining iodine collector
131i nucleic radioactivity.
In iodine collector
131i nucleic radioactivity is through accurate definite value, as the measurement standard of scale, detection Airborne Radioiodine surveying instrument detection efficiency.
As shown in Figure 2, iodine generation and acquisition subsystem 1 further comprise reaction vessel 10, iodine chamber 11 and iodine collector 12.Reaction vessel 10 is all connected with iodine chamber 11 with iodine collector 12.Iodine collector 12 specifically refers to Fig. 3, is combined by filter screen, active carbon filter paper 120 and filter box 121.
The structure of iodine chamber 11 as shown in Figure 4, is that to be laterally cylindric, volume be (0.5～1.0) m to an inner chamber
3closed container, electric heating temperature control device (temperature control system 114 being arranged on outside temperature sensor 110, LED lamp 111, electrical heating wire 112, heat-insulation layer 113 and the cavity in cavity as shown in the figure forms) is installed in cavity, ℃ adjustable in (room temperature～80), the both sides that cavity is plane are provided with view window 115 and thief hatch 116.
Iodine chamber 11 is connected with inner loop mode with reaction vessel 10, and air pump produces the air-flow of 2l/min flow velocity, and chemical reaction is produced
131i
2send into iodine chamber 11.The temperature of controlling in iodine chamber 11 is about (60～70) ℃, to reduce gaseous state
131i
2sublimate.
Sampling pump is with the sampling flow of (20～30) l/min, and iodine collector 12 adopts recycle design to gather from iodine chamber 11
131i, makes the distribution of iodine collector 12 interior radioiodines similar to atmospheric environment sampled result.
As shown in Figure 5, detection efficiency measurement subsystem 2 further comprises connected successively high purity germanium detector 20, prime amplifier 21, Spectroscopy amplifier 22, digitizing gamma ray spectrometer 23, multiple tracks buffer memory and interface 24 and computing machine 25.The input end of high purity germanium detector 20 connects the output terminal of iodine collector 12, and high purity germanium detector 20 is connected with high-voltage power supply 26 with prime amplifier 21.
Active carbon filter paper is cut into the circle identical with iodine collector 12 internal diameters, by known specific activity
131i solution quantitative and even drops on filter paper and dries, and can be obtained the radioactivity in filter paper source by the specific activity that drops in amount of solution on filter paper and solution.
Measure the activity in filter paper source with HpGe gamma ray spectrometer.In the altitude range of iodine box inner chamber, successively set filter paper source height take 5mm as interval, filter paper is filled with activated charcoal down to detector surface.The detection efficiency of gamma ray spectrometer while obtaining filter paper spacing detector surface differing heights by measurement result.
By activity value, the detection efficiency of gamma ray spectrometer to differing heights filter paper source in filter paper source, intend calculative determination HpGe gamma ray spectrometer in iodine collector by covering snap gauge
131the detection efficiency of I radioactivity.Measure in iodine collector with the HpGe gamma ray spectrometer of determining detection efficiency
131i radioactivity.
Will
131the I radioactivity iodine collector of definite value is arranged on the corresponding position of Airborne Radioiodine surveying instrument and measures, and the instrument counting rate after deduction background and the ratio of radioactivity are detection efficiency.
Some technical parameters that are applied in the utility model are as follows:
Fe
2(SO
4)
3xH
2o solution: 0.1mol/l, 100ml; NaI solution 0.1mol/l, 10ml
Temperature of reaction :～80 ℃; Stir or oscillation frequency: 1Hz; Reaction time: Ih; Circulating current :～21/min between reaction vessel and iodine chamber.
Under these conditions, I
2generation rate: (70～85) %.
Iodine chamber is laterally cylindric, sealing, inner wall smooth, the illumination of LED lamp, electrical heating, temperature control: room temperature～80C; There are view window, thief hatch in the both sides that are plane.
Flow velocity (20～30) the 1/min when sampling of iodine collector.
Above-described embodiment is available to those of ordinary skills and realizes and use of the present utility model; those of ordinary skills can be in the situation that not departing from invention thought of the present utility model; above-described embodiment is made to various modifications or variation; thereby protection domain of the present utility model do not limit by above-described embodiment, and it should be the maximum magnitude that meets the inventive features that claims mention.
Claims (3)
1. the measuring system of the detection efficiency of an Airborne Radioiodine surveying instrument, it is characterized in that, comprise iodine generation and acquisition subsystem and detection efficiency measurement subsystem, wherein iodine generation and acquisition subsystem further comprise reaction vessel, iodine chamber and iodine collector, reaction vessel is all connected with iodine chamber with iodine collector, detection efficiency measurement subsystem further comprises connected successively high purity germanium detector, prime amplifier, Spectroscopy amplifier, digitizing gamma ray spectrometer, multiple tracks buffer memory and interface and computing machine, wherein the input end of high purity germanium detector connects the output terminal of iodine collector, high purity germanium detector is connected with high-voltage power supply with prime amplifier.
2. the measuring system of the detection efficiency of Airborne Radioiodine surveying instrument according to claim 1, is characterized in that, iodine collector is combined by filter screen, active carbon filter paper and filter box.
3. the measuring system of the detection efficiency of Airborne Radioiodine surveying instrument according to claim 1, it is characterized in that, iodine chamber is that an inner chamber is horizontal closed container cylindraceous, and electric heating temperature control device is installed in cavity, and the both sides that are plane are provided with view window and thief hatch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811494.2U CN203616482U (en) | 2013-12-10 | 2013-12-10 | Measuring system for detection efficiency of airbone radioactive iodine measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811494.2U CN203616482U (en) | 2013-12-10 | 2013-12-10 | Measuring system for detection efficiency of airbone radioactive iodine measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203616482U true CN203616482U (en) | 2014-05-28 |
Family
ID=50769113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320811494.2U Expired - Lifetime CN203616482U (en) | 2013-12-10 | 2013-12-10 | Measuring system for detection efficiency of airbone radioactive iodine measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203616482U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616712A (en) * | 2013-12-10 | 2014-03-05 | 上海市计量测试技术研究院 | Measuring method and system for detection efficiency of airborne radioactive iodine measuring apparatus |
| CN107300714A (en) * | 2016-04-14 | 2017-10-27 | 中国辐射防护研究院 | A kind of detection efficient calibration method of radioiodine activated carbon sampling filter box |
| CN109814150A (en) * | 2019-01-31 | 2019-05-28 | 上海市计量测试技术研究院 | A kind of measuring system and measurement method of the airborne iodine -131 output capacity function of time |
| CN109991646A (en) * | 2017-12-31 | 2019-07-09 | 中国人民解放军63653部队 | Si-PINX ray detector measures radgas measuring chamber |
| CN110632642A (en) * | 2019-10-29 | 2019-12-31 | 绵阳市维博电子有限责任公司 | Rotary radioactive iodine monitoring system and method |
-
2013
- 2013-12-10 CN CN201320811494.2U patent/CN203616482U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616712A (en) * | 2013-12-10 | 2014-03-05 | 上海市计量测试技术研究院 | Measuring method and system for detection efficiency of airborne radioactive iodine measuring apparatus |
| CN103616712B (en) * | 2013-12-10 | 2016-04-13 | 上海市计量测试技术研究院 | The measuring method of the detection efficiency of Airborne Radioiodine surveying instrument |
| CN107300714A (en) * | 2016-04-14 | 2017-10-27 | 中国辐射防护研究院 | A kind of detection efficient calibration method of radioiodine activated carbon sampling filter box |
| CN109991646A (en) * | 2017-12-31 | 2019-07-09 | 中国人民解放军63653部队 | Si-PINX ray detector measures radgas measuring chamber |
| CN109991646B (en) * | 2017-12-31 | 2021-05-28 | 中国人民解放军63653部队 | Measuring chamber for measuring radioactive gas by Si-PINX ray detector |
| CN109814150A (en) * | 2019-01-31 | 2019-05-28 | 上海市计量测试技术研究院 | A kind of measuring system and measurement method of the airborne iodine -131 output capacity function of time |
| CN110632642A (en) * | 2019-10-29 | 2019-12-31 | 绵阳市维博电子有限责任公司 | Rotary radioactive iodine monitoring system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |