CN109814150A - A kind of measuring system and measurement method of the airborne iodine -131 output capacity function of time - Google Patents
A kind of measuring system and measurement method of the airborne iodine -131 output capacity function of time Download PDFInfo
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- CN109814150A CN109814150A CN201910099818.6A CN201910099818A CN109814150A CN 109814150 A CN109814150 A CN 109814150A CN 201910099818 A CN201910099818 A CN 201910099818A CN 109814150 A CN109814150 A CN 109814150A
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Abstract
The present invention discloses the measuring system and method for the airborne iodine -131 output capacity function of time, disposably measures the output capacity variation function of the airborne entire manufacturing cycle of iodine -131 preparation facilities, assesses device superiority and inferiority, guiding device optimization.Its technical solution are as follows: system includes gamma energy spectrometer, spectrometer sub computers system, airborne iodine -131 absorption bottle and the ancillary equipment including gas conduit and connector；The airborne iodine -131 of airborne iodine -131 preparation facilities output is collected and is fixed by airborne iodine -131 absorption bottle；Gas conduit connect measured airborne iodine -131 preparation facilities and airborne iodine -131 absorption bottle with connector；Gamma energy spectrometer is for monitoring in airborne iodine -131 absorption bottle131The gamma-rays of I release, output measurement spectrum to spectrometer sub computers system；Spectrometer sub computers system grabs the measurement spectrum of gamma energy spectrometer in real time, is composed according to measurement and calculates correspondence131I activity obtains in airborne iodine -131 absorption bottle131The data sequence that I activity changes over time.
Description
Technical field
The present invention relates to radiation safeties to monitor field.It can measure airborne iodine -131 preparation more specifically to one kind
The system and method that device output capacity changes over time relationship.
Background technique
As a kind of radionuclide,131The gamma-rays of I (i.e. iodine -131) decay release can cause dose of radiation, threaten human body
Health.And131I is easy to be enriched in human thyroglobulin, this characteristic can amplify131Health risk caused by I.131I is that nuclear reactor is split
Become one of the product of reaction, in Chernobyl nuclear accident, Fukushima nuclear accident, public's dose of radiation is mostly come from131I
With137The big radionuclide of Cs two.131I is equally a kind of nuclear medicine commonly diagnosis and treatment radionuclide, in the case of accident, is waved
Hair131I also can not be ignored the pollution of medical space.It is airborne131I monitoring method, safeguard procedures and deposition such as migrate at the behaviors
Research is of great significance for public's radiation safety.
With airborne131I preparation facilities is the airborne of core131I test platform is that development is airborne131I monitoring method is arranged with protection
Apply the basis of R&D work.It is airborne131It is the key parameter of test platform the time required to the output capacity and preparation of I preparation facilities.
Existing method is within a certain period of time will be airborne131I preparation facilities output it is airborne131After I is absorbed with solution, it is transferred to horse
Woods cup, after being settled to normal volume, in high-purity oleic acid measurement absorbing liquid131I activity, to calculate the output period
It is interior131The output capacity of I.This method is not only complicated for operation, spends the time long, and it is corresponding to obtain output special time period
's131I output capacity, the information that single experiment obtains are very limited.
Therefore, the measuring system for researching and developing a kind of airborne iodine -131 output capacity function of time, disposably measures airborne iodine -131
The output capacity of the entire manufacturing cycle of preparation facilities changes function, is greatly improved airborne131The assessment efficiency of I preparation facilities.For
Ensure the sound development of nuclear industry, maintenance nuclear safety has certain social effect and practical value.
Summary of the invention
A brief summary of one or more aspects is given below to provide to the basic comprehension in terms of these.This general introduction is not
The extensive overview of all aspects contemplated, and be both not intended to identify critical or decisive element in all aspects also non-
Attempt to define the range in terms of any or all.Its unique purpose is to provide the one of one or more aspects in simplified form
A little concepts are with the sequence for more detailed description given later.
The purpose of the present invention is to solve the above problem, provides a kind of measurement of airborne iodine -131 output capacity function of time
System and method, can disposably measure the specific airborne entire manufacturing cycle of iodine -131 preparation facilities output capacity variation letter
Number, to assess the superiority and inferiority of the device, instructs the optimization of the device.
The technical solution of the present invention is as follows: present invention discloses a kind of measurement systems of airborne iodine -131 output capacity function of time
System, system include that a gamma energy spectrometer, spectrometer sub computers system, at least one airborne iodine -131 absorption bottle and gas are led
Pipe and connector；
Wherein:
Airborne iodine -131 absorption bottle is used to collect the airborne iodine -131 of airborne iodine -131 preparation facilities output and fix；
Gas conduit and connector are used to connect measured airborne iodine -131 preparation facilities and airborne iodine -131 absorption bottle；
Gamma energy spectrometer is for monitoring in airborne iodine -131 absorption bottle131The gamma-rays of I release, output measurement spectrum to spectrometer
Sub computers system；
Spectrometer sub computers system and gamma energy spectrometer establish data connection, and the measurement for grabbing gamma energy spectrometer is composed, root
It composes to calculate according to measurement and correspond to131I activity, to obtain in airborne iodine -131 absorption bottle131The data sequence that I activity changes over time
Column.
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, measuring system are also wrapped
Include the fixation bracket for the spatial position of all parts in fixed system.
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, measuring system are also wrapped
Another gamma energy spectrometer is included, in the reaction vessel for monitoring measured airborne iodine -131 preparation facilities131The γ of I release is penetrated
Line, another gamma energy spectrometer output measurement spectrum is to spectrometer sub computers system to obtain in reaction vessel131I activity is at any time
Between the data sequence that changes.
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, reaction vessel for
The gamma energy spectrometer for monitoring airborne iodine -131 absorption bottle is interference region, and the installation of spectrometer sub computers system is for deducting interference shadow
Loud computer program, the computer program are configured that
Following system of linear equations is established to each regionally detecting efficiency according to every gamma energy spectrometer, it is anti-to solve system of linear equations button
Except interregional interference:
Wherein SiIt is i-th gamma energy spectrometer received signal intensity, εijI-th gamma energy spectrometer is to j-th of region131The spy of I
Survey efficiency, AjIt is j-th of region131I activity；
To above-mentioned Solving Linear, each region can be obtained131I activity value A1~An。
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, measuring system are also wrapped
Emission shield is included, for shielding in reaction vessel131The influence of the gamma energy spectrometer of I iodine -131 absorption bottle airborne for monitoring.
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, the mating calculating of spectrometer
Machine system also configures data visualization display module and data analysis and processing module.
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, airborne iodine -131 are inhaled
Bottle is received according to the difference of the airborne iodine -131 form of airborne iodine -131 preparation facilities output, has different selections, including but unlimited
In: for elementary iodine vapor, select the bubbling bottle that hypo solution is housed；For iodomethane, selection is placed in ice-water bath
In the bubbling bottle equipped with acetone.
One embodiment of the measuring system of the airborne iodine -131 output capacity function of time according to the present invention, it is multiple airborne iodo-
It is serially connected between 131 absorption bottles.
Present invention further teaches a kind of measurement methods of airborne iodine -131 output capacity function of time, are measuring as described above
Implement in system, which comprises
Airborne iodine -131 preparation facilities and airborne iodine -131 absorption bottle gas conduit and connector are connected into gas circuit, gas circuit
Start airborne iodine -131 preparation facilities after the completion of connection, the airborne iodine -131 of preparation is with the gas for forming airborne iodine -131 preparation facilities
The air-flow for pumping driving enters airborne iodine -131 absorption bottle along gas conduit, is absorbed by airborne iodine -131 absorption bottle；
Gamma energy spectrometer monitors in airborne iodine -131 absorption bottle131The gamma-rays of I release, output measurement spectrum are mating to spectrometer
Computer system；
Spectrometer sub computers system is based on measurement spectrum and calculates correspondence131I activity, to obtain airborne iodine -131 absorption bottle
Interior131The data sequence that I activity changes over time.
One embodiment of the measurement method of the airborne iodine -131 output capacity function of time according to the present invention, before starting measurement
Interference of the non-interesting region to region-of-interest is reduced, wherein the processing for reducing interference includes but is not limited to shield interference, far from dry
It disturbs source or algorithm deducts interference, region-of-interest is the absorbing liquid in airborne iodine -131 absorption bottle, and non-interesting region is composition gas
Carry the reaction vessel of iodine -131 preparation facilities；
Wherein algorithm deduct interference processing include:
Firstly, more gamma energy spectrometers of measurement are respectively to the detection efficient in respective monitoring region, these monitoring regions are divided into pass
Infuse region and non-interesting region；
Then, following system of linear equations is established to each regionally detecting efficiency according to every gamma energy spectrometer, the anti-linear side of solution
Journey group deducts interregional interference:
Wherein SiIt is i-th gamma energy spectrometer received signal intensity, εijI-th gamma energy spectrometer is to j-th of region131The spy of I
Survey efficiency, AjIt is j-th of region131I activity；
To above-mentioned Solving Linear, each region can be obtained131I activity value A1~An。
The present invention, which compares the prior art, to be had following the utility model has the advantages that the present invention is based on gamma energy spectrometer Detection Techniques, is devised
The measuring system of a set of airborne iodine -131 output capacity function of time, it is corresponding that the existing method of breakthrough can only measure special time period131I output capacity is unable to measure the situation that airborne iodine -131 output capacity changes over time process.In real time will in addition, the present invention is directed to
Measurement spectrum is converted into131The demand of I activity develops corresponding computer software.The invention also provides measurement implementation process in,
The solution that region-of-interest is interfered in non-interesting region.
Detailed description of the invention
After the detailed description for reading embodiment of the disclosure in conjunction with the following drawings, it better understood when of the invention
Features described above and advantage.In the accompanying drawings, each component is not necessarily drawn to scale, and has similar correlation properties or feature
Component may have same or similar appended drawing reference.
Fig. 1 shows the principle of an embodiment of the measuring system of the airborne iodine -131 output capacity function of time of the invention
Figure.
Fig. 2 shows the processes of an embodiment of the measurement method of the airborne iodine -131 output capacity function of time of the invention
Figure.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Note that below in conjunction with attached drawing and specifically real
The aspects for applying example description is merely exemplary, and is understood not to carry out any restrictions to protection scope of the present invention.
Fig. 1 shows the principle of an embodiment of the measuring system of the airborne iodine -131 output capacity function of time of the invention.
Referring to Figure 1, the measuring system of the present embodiment is inhaled by a gamma energy spectrometer 11, spectrometer sub computers system 2, airborne iodine -131
It receives bottle 3 and other ancillary equipments (including fixed bracket, gas conduit and connector 5 etc.) is constituted, it is airborne iodo- for real-time measurement
The airborne iodine -131 output capacity of 131 preparation facilities 6 (preparation facilities 6 is usually made of reaction vessel 61 and air pump 62).
Gas conduit connect measured airborne iodine -131 preparation facilities 6 and airborne iodine -131 absorption bottle 3 with connector 5.Gas
It carries iodine -131 absorption bottle 3 and the airborne iodine -131 of airborne iodine -131 preparation facilities output is collected into fixation, so as to gamma energy spectrometer measurement.
According to the difference of the airborne iodine -131 form of output, airborne iodine -131 absorption bottle 3 can have different selections, such as iodine
The bubbling bottle equipped with hypo solution can be selected in steam；For iodomethane, optional be placed in ice-water bath is equipped with third
The bubbling bottle of ketone.Require the absorption efficiency of airborne iodine -131 absorption bottle 99% or more, generally to guarantee the accurate of measurement result
Property, and the airborne iodine -131 of output is avoided to leak into environment, cause radioactive pollution.The airborne iodine -131 absorption bottle 3 of single bottle is difficult
To reach the requirement, the purpose of accurate measurement and environmental protection can be met by connecting multiple absorption bottles.It is real shown in Fig. 1
Example uses two airborne iodine -131 absorption bottles 3 being connected in series to guarantee overall absorption efficiency.
Ancillary equipment is selected according to the actual situation.Fixation component each in system can be fixed with bracket so that component it
Between spatial position it is relatively fixed, and then ensure gamma energy spectrometer pair131The consistency of I detection efficient also avoids absorption bottle and inclines
, the risk accidents such as glass component collision.
Gamma energy spectrometer 11 is the core of whole system, in the airborne iodine -131 absorption bottle 3 of real-time monitoring131I release
Gamma-rays obtains in instruction absorption bottle131The measurement of I activity is composed.
Spectrometer sub computers system 2 is calculated for grabbing the measurement spectrum that gamma energy spectrometer 11 exports in real time according to measurement spectrum
It is corresponding131I activity, to obtain specific region131The data sequence that I activity changes over time.On this basis, the mating meter of spectrometer
Calculation machine system 2 be additionally configured to data visualization show, the modules such as Data Analysis Services.
It is to realize the first embodiment of the present invention above.
It, can be with since the reaction vessel 61 of composition preparation facilities 6 can impact the measurement of airborne iodine -131 absorption bottle 3
Using increase the distance between reaction vessel 61 and gamma energy spectrometer 11.Emission shield 4 can also be designed, for shielding non-interesting
Region131Influence of the I to gamma energy spectrometer, can also reduce the dose of radiation of operator.Preferably, can also be as shown in Figure 1, system
Increase another gamma energy spectrometer 12 while monitoring in reaction vessel 61131The gamma-rays of I release, to be indicated131I activity
Measurement spectrum.Spectrometer sub computers system 2 installs the computer program for deducting interference effect, and computer program is configured that
Following system of linear equations is established to each regionally detecting efficiency according to the every gamma energy spectrometer measured in advance, it is counter to solve line
Property equation group deduct interregional interference:
Wherein SiIt is i-th gamma energy spectrometer received signal intensity, εijI-th gamma energy spectrometer is to j-th of region131The spy of I
Survey efficiency, AjIt is j-th of region131I activity；
To above-mentioned Solving Linear, each region can be obtained131I activity value A1~An。
The measurement process of system as shown in Fig. 2, and the airborne iodine -131 output capacity function of time of the invention measurement side
The implementation process of one embodiment of method.
Firstly, airborne iodine -131 preparation facilities 6 is connected with the airborne gas conduit of iodine -131 absorption bottle 3 and connector 5,
And guarantee junction air-tightness.Entire gas circuit is linked to be circuit, but is not required by general recommendations example as shown in Figure 1.Gas circuit connects
After the completion of connecing, start airborne iodine -131 preparation facilities 6, the air-flow that the airborne iodine -131 of preparation drives with air pump 62 is along gas conduit
Into airborne iodine -131 absorption bottle 3, it is absorbed the absorption of bottle 3.In measurement process, in reaction vessel 61131I activity is at any time
Decline, in airborne iodine -131 absorption bottle 3131I activity is increase with time.
Gamma energy spectrometer monitors in airborne iodine -131 absorption bottle131The gamma-rays of I release, output measurement spectrum are mating to spectrometer
Computer system.
Sub computers system 2 is based on measurement spectrum and calculates correspondence131I activity, to obtain in airborne iodine -131 absorption bottle
's131The data sequence that I activity changes over time.Detailed process is through the conversion of background rejection, power spectrum and activity, interference deduction etc.
It is obtained in absorption bottle after step131I activity changes over time, and airborne iodine -131 preparation facilities is added divided by initial time131I is living
Degree, that is, obtain airborne iodine -131 preparation facilities output capacity and change over time relationship namely the airborne iodine -131 output capacity function of time.
Preferably, before measuring, needing to reduce interference of the non-interesting region to region-of-interest, wherein reducing the processing of interference
Including but not limited to shielding interference, separate interference source or algorithm deduct interference, and wherein region-of-interest is the absorption of airborne iodine -131
Absorbing liquid in bottle, non-interesting region is the reaction vessel for forming airborne iodine -131 preparation facilities.Reduce the interference of non-interesting region
Processing be mainly to have three classes method:
1) shielding interference: increase radiation shielding material (such as lead brick, lead glass between non-interesting region and gamma energy spectrometer 11
Block, tungsten plate etc.), prevent non-interesting region131The gamma-rays of I transmitting reaches the probe of gamma energy spectrometer 11, and this method is the simplest straight
It connects, but can not implement in the case where lacking shielding material；
2) far from interference source: zooming out the distance between non-interesting region and gamma energy spectrometer 11 as far as possible and (while guaranteeing concern area
The distance between domain and gamma energy spectrometer 11), interference is reduced, this method does not need additional material, but is constrained to gas circuit length,
If gas circuit is too long, airborne iodine may deposit in gas circuit, lead to underestimating for output capacity.
3) algorithm deducts interference.Firstly the need of measurement gamma energy spectrometer, to region-of-interest, (usually airborne iodine -131 is inhaled respectively
Receive bottle 3 in absorbing liquid) and non-interesting region (usually reaction vessel 61) detection efficient.The former is by a gamma energy spectrometer 11
Direct measurement result calculates region-of-interest131The key parameter of I activity, the latter are made by the measurement result of another gamma energy spectrometer 12
To be disturbed degree, should reduce as far as possible.
It is as follows for the treatment process of this scheme.
Firstly, more gamma energy spectrometers of measurement are respectively to the detection efficient in respective monitoring region, these monitoring regions are divided into pass
Infuse region and non-interesting region；
Then, each regionally detecting efficiency is established with lower linear according to every gamma energy spectrometer in sub computers system 2
Equation group, the anti-system of linear equations that solves deduct interregional interference:
Wherein SiIt is i-th gamma energy spectrometer received signal intensity, εijI-th gamma energy spectrometer is to j-th of region131The spy of I
Survey efficiency, AjIt is j-th of region131I activity；
To above-mentioned Solving Linear, each region can be obtained131I activity value A1~An。
Algorithm can deduct non-interesting region131I introduce systematic error, but the interference in non-interesting region can still bring with
Chance error is poor, can not be reduced with algorithm, therefore first two method must be combined to use.
Three kinds of methods respectively have its superiority and inferiority and restrictive condition, and can arrange in pairs or groups use according to the actual situation.
Although for simplify explain the above method is illustrated to and is described as a series of actions, it should be understood that and understand,
The order that these methods are not acted is limited, because according to one or more embodiments, some movements can occur in different order
And/or with from it is depicted and described herein or herein it is not shown and describe but it will be appreciated by those skilled in the art that other
Movement concomitantly occurs.
Those skilled in the art will further appreciate that, the various illustratives described in conjunction with the embodiments described herein
Logic plate, module, circuit and algorithm steps can be realized as electronic hardware, computer software or combination of the two.It is clear
Explain to Chu this interchangeability of hardware and software, various illustrative components, frame, module, circuit and step be above with
Its functional form makees generalization description.Such functionality be implemented as hardware or software depend on concrete application and
It is applied to the design constraint of total system.Technical staff can realize every kind of specific application described with different modes
Functionality, but such realization decision should not be interpreted to cause departing from the scope of the present invention.
General place can be used in conjunction with various illustrative logic plates, module and the circuit that presently disclosed embodiment describes
Reason device, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) other are compiled
Journey logical device, discrete door or transistor logic, discrete hardware component or its be designed to carry out function described herein
Any combination is realized or is executed.General processor can be microprocessor, but in alternative, which, which can be, appoints
What conventional processor, controller, microcontroller or state machine.Processor is also implemented as calculating the combination of equipment, example
As DSP and the combination of microprocessor, multi-microprocessor, the one or more microprocessors to cooperate with DSP core or it is any its
His such configuration.
The step of method or algorithm for describing in conjunction with embodiment disclosed herein, can be embodied directly in hardware, in by processor
It is embodied in the software module of execution or in combination of the two.Software module can reside in RAM memory, flash memory, ROM and deposit
Reservoir, eprom memory, eeprom memory, register, hard disk, removable disk, CD-ROM or known in the art appoint
In the storage medium of what other forms.Exemplary storage medium is coupled to processor so that the processor can be from/to the storage
Medium reads and writees information.In alternative, storage medium can be integrated into processor.Pocessor and storage media can
It resides in ASIC.ASIC can reside in user terminal.In alternative, pocessor and storage media can be used as discrete sets
Part is resident in the user terminal.
In one or more exemplary embodiments, described function can be in hardware, software, firmware, or any combination thereof
Middle realization.If being embodied as computer program product in software, each function can be used as one or more item instructions or generation
Code may be stored on the computer-readable medium or be transmitted by it.Computer-readable medium includes computer storage medium and communication
Both media comprising any medium for facilitating computer program to shift from one place to another.Storage medium can be can quilt
Any usable medium of computer access.It is non-limiting as example, such computer-readable medium may include RAM, ROM,
EEPROM, CD-ROM or other optical disc storages, disk storage or other magnetic storage apparatus can be used to carrying or store instruction
Or data structure form desirable program code and any other medium that can be accessed by a computer.Any connection is also by by rights
Referred to as computer-readable medium.For example, if software is using coaxial cable, fiber optic cables, twisted pair, digital subscriber line
(DSL) or the wireless technology of such as infrared, radio and microwave etc is passed from web site, server or other remote sources
It send, then the coaxial cable, fiber optic cables, twisted pair, DSL or such as infrared, radio and microwave etc is wireless
Technology is just included among the definition of medium.Disk (disk) and dish (disc) as used herein include compression dish
(CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc, which disk (disk) are often reproduced in a manner of magnetic
Data, and dish (disc) with laser reproduce data optically.Combinations of the above should also be included in computer-readable medium
In the range of.
Offer is to make any person skilled in the art all and can make or use this public affairs to the previous description of the disclosure
It opens.The various modifications of the disclosure all will be apparent for a person skilled in the art, and as defined herein general
Suitable principle can be applied to other variants without departing from the spirit or scope of the disclosure.The disclosure is not intended to be limited as a result,
Due to example described herein and design, but should be awarded and principle disclosed herein and novel features phase one
The widest scope of cause.
Claims (10)
1. a kind of measuring system of the airborne iodine -131 output capacity function of time, which is characterized in that system include a gamma energy spectrometer,
Spectrometer sub computers system, at least one airborne iodine -131 absorption bottle and gas conduit and connector；
Wherein:
Airborne iodine -131 absorption bottle is used to collect the airborne iodine -131 of airborne iodine -131 preparation facilities output and fix；
Gas conduit and connector are used to connect measured airborne iodine -131 preparation facilities and airborne iodine -131 absorption bottle；
Gamma energy spectrometer is for monitoring in airborne iodine -131 absorption bottle131The gamma-rays of I release, output measurement spectrum are mating to spectrometer
Computer system；
Spectrometer sub computers system and gamma energy spectrometer establish data connection, and the measurement for grabbing gamma energy spectrometer is composed, according to survey
Amount spectrum, which calculates, to be corresponded to131I activity, to obtain in airborne iodine -131 absorption bottle131The data sequence that I activity changes over time.
2. the measuring system of the airborne iodine -131 output capacity function of time according to claim 1, which is characterized in that measurement system
System further includes the fixation bracket for the spatial position of all parts in fixed system.
3. the measuring system of the airborne iodine -131 output capacity function of time according to claim 1, which is characterized in that measurement system
System further includes another gamma energy spectrometer, in the reaction vessel for monitoring measured airborne iodine -131 preparation facilities131I release
Gamma-rays, another gamma energy spectrometer output measurement spectrum is to spectrometer sub computers system to obtain in reaction vessel131I is living
Spend the data sequence changed over time.
4. the measuring system of the airborne iodine -131 output capacity function of time according to claim 3, which is characterized in that reaction is held
Device is interference region for the gamma energy spectrometer for monitoring airborne iodine -131 absorption bottle, and spectrometer sub computers system is installed for deducting
The computer program of interference effect, the computer program are configured that
Following system of linear equations is established to each regionally detecting efficiency according to every gamma energy spectrometer, the anti-system of linear equations that solves deducts area
It is interfered between domain:
Wherein SiIt is i-th gamma energy spectrometer received signal intensity, εijI-th gamma energy spectrometer is to j-th of region131The detection of I is imitated
Rate, AjIt is j-th of region131I activity；
To above-mentioned Solving Linear, each region can be obtained131I activity value A1~An。
5. the measuring system of the airborne iodine -131 output capacity function of time according to claim 1, which is characterized in that measurement system
System further includes emission shield, for shielding in reaction vessel131The gamma energy spectrometer of I iodine -131 absorption bottle airborne for monitoring
Influence.
6. the measuring system of the airborne iodine -131 output capacity function of time according to claim 1, which is characterized in that spectrometer is matched
Set computer system also configures data visualization display module and data analysis and processing module.
7. the measuring system of the airborne iodine -131 output capacity function of time according to claim 1, which is characterized in that airborne
Iodine -131 absorption bottle has different selections according to the difference of the airborne iodine -131 form of airborne iodine -131 preparation facilities output, packet
It includes but is not limited to: for elementary iodine vapor, selecting the bubbling bottle that hypo solution is housed；For iodomethane, selection is set
The bubbling bottle equipped with acetone in ice-water bath.
8. the measuring system of the airborne iodine -131 output capacity function of time according to claim 1, which is characterized in that Duo Geqi
It carries and is serially connected between iodine -131 absorption bottle.
9. a kind of measurement method of the airborne iodine -131 output capacity function of time, which is characterized in that surveying as described in claim 1
Implement in amount system, which comprises
Airborne iodine -131 preparation facilities and airborne iodine -131 absorption bottle gas conduit and connector are connected into gas circuit, air circuit connection
Start airborne iodine -131 preparation facilities after the completion, the airborne iodine -131 of preparation drives with the air pump for forming airborne iodine -131 preparation facilities
Dynamic air-flow enters airborne iodine -131 absorption bottle along gas conduit, is absorbed by airborne iodine -131 absorption bottle；
Gamma energy spectrometer monitors in airborne iodine -131 absorption bottle131The gamma-rays of I release, output measurement spectrum to the mating calculating of spectrometer
Machine system；
Spectrometer sub computers system is based on measurement spectrum and calculates correspondence131I activity, to obtain in airborne iodine -131 absorption bottle
's131The data sequence that I activity changes over time.
10. the measurement method of the airborne iodine -131 output capacity function of time according to claim 9, which is characterized in that opening
Begin to reduce interference of the non-interesting region to region-of-interest before measuring, wherein the processing for reducing interference includes but is not limited to shield to do
It disturbs, deduct interference far from interference source or algorithm, region-of-interest is the absorbing liquid in airborne iodine -131 absorption bottle, non-interesting region
For the reaction vessel for forming airborne iodine -131 preparation facilities；
Wherein algorithm deduct interference processing include:
Firstly, more gamma energy spectrometers of measurement are respectively to the detection efficient in respective monitoring region, these monitoring regions are divided into concern area
Domain and non-interesting region；
Then, following system of linear equations is established to each regionally detecting efficiency according to every gamma energy spectrometer, it is counter to solve system of linear equations
Deduct interregional interference:
Wherein SiIt is i-th gamma energy spectrometer received signal intensity, εijI-th gamma energy spectrometer is to j-th of region131The detection of I is imitated
Rate, AjIt is j-th of region131I activity；
To above-mentioned Solving Linear, each region can be obtained131I activity value A1~An。
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| WO2014136990A1 (en) * | 2013-03-08 | 2014-09-12 | 国立大学法人九州大学 | High-sensitivity neutron detection method using self-radioactivation of scintillator |
| 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 |
| CN203616482U (en) * | 2013-12-10 | 2014-05-28 | 上海市计量测试技术研究院 | Measuring system for detection efficiency of airbone radioactive iodine measuring instrument |
| CN105457493A (en) * | 2014-09-10 | 2016-04-06 | 中国辐射防护研究院 | Method and system for preparing radioactive elemental iodine through isotope exchange method |
| 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 |
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