CN203365689U - Standard source for scale of segmental gamma scanning device of radioactive waste barrel - Google Patents
Standard source for scale of segmental gamma scanning device of radioactive waste barrel Download PDFInfo
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- CN203365689U CN203365689U CN 201320445784 CN201320445784U CN203365689U CN 203365689 U CN203365689 U CN 203365689U CN 201320445784 CN201320445784 CN 201320445784 CN 201320445784 U CN201320445784 U CN 201320445784U CN 203365689 U CN203365689 U CN 203365689U
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- source
- sleeve pipe
- carrier unit
- pail
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Abstract
The utility model belongs to the technical field of radioactive source for dosage magnitude transmission, and discloses a standard source for the scale of a segmental gamma scanning device of a radioactive waste barrel. The standard source comprises a wastebin, a sleeve in the wastebin, a source support and a radioactive source with a gamma radioactive source, wherein the source support is arranged in the sleeve which is in the wastebin, the source support is formed by source support units sequentially connected from the upper to the lower, and radioactive source with a gamma radioactive source is situated in source support units. The standard source is agile in structure, convenient for storage and conveying, and is suitable for scale of segmental gamma scanning devices of different stromatic radioactive waste barrels.
Description
Technical field
The utility model belongs to the radioactive source technical field for the dosage transmission of quantity value, is specifically related to a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale.
Background technology
Nuclear facilities has produced a large amount of radioactive solid wastes in production, operation and retired process, and refuse produces after unit is reorganized and outfit these refuses usually the standard pail for used dressings of packing into.Before disposing these nuclear wastes, must accurately differentiate and measure it, with the amount of contained nuclear material type and the contained nuclear material of Measurement accuracy in the differentiation refuse, in order to nuclear waste is processed to disposal.At present, the segmentation γ scanning method SGS that adopt carry out whole Fast Measurement to pail for used dressings more in the world.Its measuring principle is: according to the principle of gamma-rays and matter interaction, measured object (bucket) is set as to some sections, at the uniform velocity rotate measured object, record the gamma-rays power spectrum of radioactive nuclide in measured object with gamma ray detector, utilize the efficiency of known probes and the funtcional relationship of energy of γ ray, obtain the amount of radioactive nuclide in this section measured object.By vertically moving measured object, each section measured respectively, sued for peace, can obtain the total amount of the interior radioactive nuclide of measured object (bucket).
The Measuring Time of SGS device is shorter and cost is lower, therefore be widely used, but also there are many difficult problems in its scale and calibration always.First, because the matrix of the in-built residue of pail for used dressings and refuse sample has all kinds of different potpourris such as graphite, calcium fluoride, cotton yarn, rag, rubber, and the density variation of sample substrate is large, be difficult to the right gamma-ray self-absorption of accurate correcting sample itself, especially energy of γ ray is lower, the more difficult correction of sample self-absorption that matrix density is higher; Second, radioactive nuclide and matrix material complicated component due to analyzed sample, while for instrument, carrying out scale, must at first adopt calibration standards a series of and that testing sample is approximate to carry out scale to gamma spectrum nondestructive analysis measurement mechanism, and prepare different types of calibration standards, will expend huge energy and fund; The 3rd, the measurement of SGS device is to be based upon on the basis that each piecewise uniform distributes, and the distribution that must be known activity and radiomaterial for the standard specimen of scale must evenly, for solid-state filling substrate, be difficult to radioactive nuclide is dispersed in to its inside; The 4th, because SGS device itself is heavier, when calibrating or calibrated scale, the pail for used dressings standard specimen can only be transmitted.Pail for used dressings is from 50L to the 400L different size, and the series of radioactive standard specimen standby with the uniform filling legal system exists difficulty when storing and transport.Therefore, be badly in need of a kind of transmit simple, for the standard source of radioactive waste bucket segmentation gamma scanner device scale.
The utility model content
(1) utility model purpose
According to the existing problem of prior art, the utility model provides a kind of flexible structure, has been convenient to store and transport and be suitable for the standard source of the radioactive waste bucket segmentation gamma scanner device scale of different substrates.
(2) technical scheme
The utility model provides a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale, this standard source comprises pail for used dressings, be positioned at sleeve pipe, the source support of bucket and the radiation source container of gamma ray radiator is housed, wherein the top of pail for used dressings and bottom are respectively equipped with upper mounted plate and bottom plate, upper mounted plate and bottom plate are equipped with spacing hole, the upper/lower terminal of sleeve pipe inserts respectively in the spacing hole of upper mounted plate and bottom plate, make the axis of sleeve pipe parallel with the axis of pail for used dressings, be filled with matrix in pail for used dressings;
The quantity of described sleeve pipe is more than 7 or 7, and every sleeve pipe is different from the distance of pail for used dressings axis; The axis of every sleeve pipe and pail for used dressings axis form a plane, and the angle between adjacent plane is identical;
Described source support is positioned at sleeve pipe, the source support is connected to form from top to bottom successively by a plurality of sources carrier unit, wherein the top of source carrier unit and bottom are respectively equipped with screw bolt and nut, and the source carrier unit is connected with the nut of the carrier unit bottom, source of its top by the bolt on top; The source carrier unit is the circular cylinder body of side with opening, and the source carrier unit can be put into and shift out to radiation source container by this opening, and the source carrier unit can just hold the radioactivity container;
Described radiation source container is placed in the carrier unit of source, and radiation source container is the circular cylinder body with gland bonnet, and the material of circular cylinder body is material acidproof, low atomic number; The gamma ray radiator that activity equates, volume is identical is equipped with in the inside of radioactivity container.
Preferably, the material of described source carrier unit is organic glass.
Preferably, the material of described radiation source container is glass.
Preferably, the material that the material of described sleeve pipe is low-density, low atomic number.
Preferably, the material of described sleeve pipe is organic glass.
Preferably, described gamma ray radiator is
152eu.
(3) beneficial effect
A kind of standard source for radioactive waste bucket segmentation gamma scanner device scale that adopts the utility model to provide has following beneficial effect:
(1) flexible structure, applicable to the needs of different volumes pail for used dressings segmentation gamma scanner device scale
In the radioactive-waste disposal process, refuse may be loaded in the pail for used dressings of different volumes, and the standard source that adopts the utility model to provide, can be by the source holder combination of varying number to meet the needs of different volumes pail for used dressings.
(2) quantity of sleeve pipe and position are reasonable
Just select 7 or 7 above sleeve pipes according to the density of matrix in pail for used dressings, the density of matrix is larger, and sleeve pipe quantity is more, the impact of the error of introducing while measuring to reduce on each position on total calibration result.
The axis of every sleeve pipe and pail for used dressings axis form a plane, due to sleeve pipe and the linear source material of inserting different from filled media, in the technical solution of the utility model, require the angle between adjacent plane identical, while avoiding standard source to rotate to different angles, because variable density makes the Gamma ray self-absorption attenuation change larger greatly, cause analog result larger with actual even pail for used dressings difference.
(3) filling substrate in pail for used dressings can change according to pail for used dressings sample to be measured, reduces the time and efforts that the preparation standard sample spends.
(4) radiation source container that fills gamma ray radiator can store separately or transport, thereby reduces the risk that the radiomaterial in the value transmittance process leaks, and guarantees safety.In addition, radiation source container is the circular cylinder body with gland bonnet, abandoned traditional mode of utilizing ampoule bottle encapsulation radioactive solution, thereby avoided that ampoule bottle is frangible to be caused radioactive contamination and encapsulate difficult shortcoming, sealing and security all are significantly increased.
The accompanying drawing explanation
Fig. 1 is the inner structure sectional view of standard source;
1. pails for used dressings wherein; 2. upper mounted plate; 3. sleeve pipe; 4. source support; 5. bottom plate;
Fig. 2 is source carrier unit schematic diagram;
Fig. 3 is the schematic diagram of source carrier unit while putting into the radioactivity container;
Fig. 4 is radioactivity container schematic diagram.
Embodiment
Below in conjunction with specification drawings and specific embodiments, the utility model is further elaborated.
A kind of standard source for radioactive waste bucket segmentation gamma scanner device scale, this standard source comprises pail for used dressings 1, be positioned at sleeve pipe 3, the source support 4 of bucket and the radiation source container of gamma ray radiator is housed, as shown in Figure 1, wherein the top of pail for used dressings and bottom are respectively equipped with upper mounted plate 2 and bottom plate 5, upper mounted plate 2 and bottom plate 5 are equipped with spacing hole, the upper/lower terminal of sleeve pipe 3 inserts respectively in the spacing hole of upper mounted plate 2 and bottom plate 5, make the axis of sleeve pipe 3 parallel with the axis of pail for used dressings 1, in pail for used dressings 1, be filled with matrix;
The quantity of described sleeve pipe 3 is 9, and the material of sleeve pipe 3 is organic glass, and every sleeve pipe 3 is different from the distance of pail for used dressings 1 axis; The axis of the axis of every sleeve pipe 3 and pail for used dressings 1 forms a plane, and the angle between adjacent plane is identical.
Described source support 4 is positioned at sleeve pipe, and source support 4 is connected to form from top to bottom successively by a plurality of sources carrier unit, and the material of source carrier unit is organic glass.Wherein the top of source carrier unit and bottom are respectively equipped with screw bolt and nut, and the source carrier unit is connected with the screw of the carrier unit bottom, source of its top by the bolt on top; The source carrier unit is the circular cylinder body of side with opening, and the source carrier unit can be put into and shift out to radiation source container by this opening, and the source carrier unit can just hold the radioactivity container, and the schematic diagram of source carrier unit as shown in Figure 2.
Described radiation source container is placed in the carrier unit of source, and as shown in Figure 3,4, radiation source container is the circular cylinder body with gland bonnet, and the material of circular cylinder body is glass; The inside of radioactivity container is equipped with that activity equates, volume is identical
152the Eu source.
Method of operating and principle while adopting this standard source to pail for used dressings segmentation gamma scanner device detection efficiency calibration are: (1), according to the matrix of pail for used dressings to be measured, is distributed in the sleeve pipe of suitable quantity in the pail for used dressings of standard source.(2) the source support that gamma ray radiator will be housed is put into some sleeve pipes, and all the other sleeve pipes are filled the material identical with pail for used dressings matrix.(3) the rotation pail for used dressings carries out the segmentation γ scanning, obtains the gamma-rays power spectrum of radioactive nuclide; Then putting into successively each sleeve pipe measures in an identical manner.(4) measurement result that on each energy point, diverse location obtains be take to radius as variable carries out matching, calculate the counting that the segmentation gamma scanner device records gamma ray radiator in each segmentation, with known activity, compare the detection efficiency that is this device.
The pail for used dressings equivalence that this patent described pail for used dressings standard source measurement result and uniformity are filled, its ultimate principle is:
For the pail for used dressings of uniform filling matrix and desirable linear source, the gamma-rays full energy peak net counting rate A that energy is E
e(R) be the function of linear source present position, suc as formula (1).
A
E(R)＝exp(a
0E+a
1ER+a
2ER
2) (I)
Wherein R is the distance of present position to the center of circle, a
iEfor the fitting coefficient with energy correlation.
If the N etc. activity
sthe peak area A that individual linear source records
t,Efor:
The maximum radius of supposing bucket is Rmax, if along N linear source of radius 0～Rmax distribution, N is enough large, total peak area mistake! Do not find Reference source.For:
According to integral principle, different linear sources are inserted to diverse locations after the measurement result sum divided by N, i.e. mistake! Do not find Reference source./ N equal in uniform dielectric the to be evenly distributed activity of radioactive nuclide, N levels off to infinite, more with real result of detection, approaches.
Claims (6)
1. the standard source for radioactive waste bucket segmentation gamma scanner device scale, it is characterized in that, this standard source comprises pail for used dressings, be positioned at sleeve pipe, the source support of bucket and the radiation source container of gamma ray radiator is housed, wherein the top of pail for used dressings and bottom are respectively equipped with upper mounted plate and bottom plate, upper mounted plate and bottom plate are equipped with spacing hole, the upper/lower terminal of sleeve pipe inserts respectively in the spacing hole of upper mounted plate and bottom plate, make the axis of sleeve pipe parallel with the axis of pail for used dressings, be filled with matrix in pail for used dressings;
The quantity of described sleeve pipe is more than 7 or 7, and every sleeve pipe is different from the distance of pail for used dressings axis; The axis of every sleeve pipe and pail for used dressings axis form a plane, and the angle between adjacent plane is identical;
Described source support is positioned at sleeve pipe, the source support is connected to form from top to bottom successively by a plurality of sources carrier unit, wherein the top of source carrier unit and bottom are respectively equipped with screw bolt and nut, and the source carrier unit is connected with the nut of the carrier unit bottom, source of its top by the bolt on top; The source carrier unit is the circular cylinder body of side with opening, and the source carrier unit can be put into and shift out to radiation source container by this opening, and the source carrier unit can just hold the radioactivity container;
Described radiation source container is placed in the carrier unit of source, and radiation source container is the circular cylinder body with gland bonnet, and the material of circular cylinder body is material acidproof, low atomic number; The gamma ray radiator that activity equates, volume is identical is equipped with in the inside of radioactivity container.
2. a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale according to claim 1, is characterized in that, the material of described source carrier unit is organic glass.
3. a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale according to claim 1, is characterized in that, the material of described radiation source container is glass.
4. a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale according to claim 1, is characterized in that the material that the material of described sleeve pipe is low-density, low atomic number.
5. a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale according to claim 1, is characterized in that, the material of described sleeve pipe is organic glass.
6. a kind of standard source for radioactive waste bucket segmentation gamma scanner device scale according to claim 1, is characterized in that, described gamma ray radiator is
152eu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320445784 CN203365689U (en) | 2013-07-25 | 2013-07-25 | Standard source for scale of segmental gamma scanning device of radioactive waste barrel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320445784 CN203365689U (en) | 2013-07-25 | 2013-07-25 | Standard source for scale of segmental gamma scanning device of radioactive waste barrel |
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|---|---|
| CN203365689U true CN203365689U (en) | 2013-12-25 |
Family
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| CN 201320445784 Withdrawn - After Issue CN203365689U (en) | 2013-07-25 | 2013-07-25 | Standard source for scale of segmental gamma scanning device of radioactive waste barrel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424762A (en) * | 2013-07-25 | 2013-12-04 | 中国原子能科学研究院 | Standard source for radioactive waste barrel segmenting gamma scanning device scales |
| CN106875996A (en) * | 2017-01-04 | 2017-06-20 | 中国原子能科学研究院 | It is a kind of238PuO2Head tank surface contamination method of disposal |
| CN109269538A (en) * | 2018-10-16 | 2019-01-25 | 中国海洋石油集团有限公司 | One kind is with brill neutron He3 pipe scale test device |
-
2013
- 2013-07-25 CN CN 201320445784 patent/CN203365689U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424762A (en) * | 2013-07-25 | 2013-12-04 | 中国原子能科学研究院 | Standard source for radioactive waste barrel segmenting gamma scanning device scales |
| CN103424762B (en) * | 2013-07-25 | 2015-04-29 | 中国原子能科学研究院 | Standard source for radioactive waste barrel segmenting gamma scanning device scales |
| CN106875996A (en) * | 2017-01-04 | 2017-06-20 | 中国原子能科学研究院 | It is a kind of238PuO2Head tank surface contamination method of disposal |
| CN106875996B (en) * | 2017-01-04 | 2018-08-24 | 中国原子能科学研究院 | It is a kind of238PuO2Head tank surface contamination method of disposal |
| CN109269538A (en) * | 2018-10-16 | 2019-01-25 | 中国海洋石油集团有限公司 | One kind is with brill neutron He3 pipe scale test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20150429 |