CN109061709B - Radioactive source bracket for detecting alpha and beta probes - Google Patents
Radioactive source bracket for detecting alpha and beta probes Download PDFInfo
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- CN109061709B CN109061709B CN201810613982.XA CN201810613982A CN109061709B CN 109061709 B CN109061709 B CN 109061709B CN 201810613982 A CN201810613982 A CN 201810613982A CN 109061709 B CN109061709 B CN 109061709B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention relates to the field of pollution monitoring and verification, and particularly discloses an alpha and beta probe verification radioactive source bracket which comprises a base, a sliding block arranged on the base, a bolt with one end fixedly connected with the sliding block through a screw, and a handle connected with the other end of the bolt. The invention is convenient for calibrating the loading and unloading detector of the radioactive source bracket, can realize the calibration of circular and square detectors with different sizes, realizes the accurate adjustment of the distance between the detector and a plane source, meets the requirement of calibration regulations and has accurate calibration data.
Description
Technical Field
The invention belongs to the field of pollution monitoring and verification, and particularly relates to a radioactive source bracket for alpha and beta probe verification.
Background
The alpha and beta surface pollution meters used in the nuclear power plant belong to strong detection meters, the detection must be arranged according to a detection period, detectors of the alpha and beta surface pollution meters are arranged at positions 5mm or 10mm above a plane source active area during detection, wherein alpha is 5mm, beta is 10mm, the positioning must be accurate and stable, if the distance has a slight deviation, the deviation can be generated on a measurement index, the judgment of a detection conclusion is further influenced, and the wrong judgment can be generated.
Therefore, it is necessary to design an α and β probe for calibrating a radiation source holder to reduce measurement deviation.
Disclosure of Invention
The invention aims to provide a radioactive source bracket for alpha and beta probe verification, which can be used for placing a planar source and a detector during verification operation.
The technical scheme of the invention is as follows:
a radioactive source bracket for detecting alpha and beta probes is characterized in that alpha and beta surface pollution detector detectors are arranged at positions 5mm or 10mm above a plane source active area during detection, wherein alpha is 5mm, and beta is 10mm; the bracket comprises a handle, a sliding block, a base, a bolt and a screw;
the base is a cuboid flat plate, the left side and the right side of the base are respectively provided with two baffle plates, and the two baffle plates are parallel to each other and are both vertical to the upper surface of the base; a left side stop block is arranged in front of the baffle on the left side of the base;
a hole is formed in the center of the baffle on the right side of the base, and threads are machined on the inner wall of the hole and matched with the bolt; a sliding block is arranged between the left side stop block and the right side baffle of the base, the upper surface of a section of the base between the left side stop block and the sliding block is used as a plane source bearing surface, and a plane source is arranged on the plane source bearing surface;
one end of the bolt is fixed on the sliding block through a screw, and the other end of the bolt penetrates through the hole to be connected with the handle; the handle can rotate to drive the bolt to screw in or screw out along the hole;
setting the position between the left side stop block and the slide block as a detector placing position for placing a detector;
the bolt moves by rotating the handle, and the sliding block is further pushed to be fastened with the detector;
and adjusting the distance between the detector window and the plane source on the plane source bearing surface according to the verification requirement.
The device is characterized by also comprising a supporting plate, wherein the supporting plate is a rectangular flat plate, and a circular groove is formed in the center of the upper surface of the supporting plate and used for placing a circular detector to be detected;
when the detector is a circular detector, the supporting plate is arranged at a detector placing position above the base and between the left side stop block and the sliding block, and the circular detector is placed in the groove;
when the detector is a square detector, the supporting plate is taken out, and the square detector is placed at a detector placing position between the left side stop block and the sliding block.
The PE plate is placed on the plane source bearing surface, and the plane source is placed on the PE plate; the PE plate is used for adjusting the distance between the plane source and the detector window.
After the detector is fixed, the distance between the detector window and the plane source on the plane source bearing surface is 10mm;
when the alpha plane source is used, the PE plate is placed on the plane source bearing surface, and then the alpha plane source is placed on the PE plate, so that the distance between the alpha plane source and the detector is shortened to 5mm;
when a beta planar source is used, the beta planar source is placed directly on the planar source support surface such that the distance between the beta planar source and the detector is 10mm.
And a clamping groove is arranged at the lower part of the left side stop block, and one end of the plane source is clamped in the clamping groove of the left side stop block.
The alpha plane source and the beta plane source have the same thickness.
The front side and the rear side of the base are respectively provided with a cavity, and the cavities penetrate through the upper surface and the lower surface of the base.
The front side and the rear side of the base are respectively provided with two cavities, so that the whole support is convenient to carry.
The PE plate is made of nonpolar thermoplastic resin with high crystallinity, high toughness, tensile strength, corrosion resistance and wear resistance, and the problems of deformation and friction thinning can not occur after long-time use.
According to the requirements of circular detectors with different sizes, a plurality of supporting plates with grooves with different sizes can be designed.
The invention has the following remarkable effects:
(1) The invention is convenient for detecting the loading and unloading detectors of the radioactive source bracket and can realize the detection of circular and square detectors with different sizes.
(2) The invention realizes the accurate adjustment of the distance between the detector and the plane source by calibrating the radioactive source bracket, meets the requirement of the calibration regulation and has accurate calibration data.
Drawings
FIG. 1 is a front view of a bracket;
FIG. 2 is a right side view of the bracket;
fig. 3 is a top view of the bracket.
In the figure: 1. a groove; 2. a support plate; 3. a detector placement position; 4. a handle; 5. a slider; 6. a base; 7. a left side stop block; 8. a hole; 9. a void; 10. a bolt; 11. a screw; 12. a planar source bearing surface.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The radiation source bracket for alpha and beta probe verification as shown in figures 1-3 comprises a supporting plate 2, a handle 4, a sliding block 5, a base 6, a bolt 10 and a screw 11.
A hole 8 is formed in the center of the baffle on the right side of the base 6, and threads are machined on the inner wall of the hole 8 and matched with a bolt 10. A slide block 5 is arranged between the left side stop block 7 and the right side baffle plate of the base 6, and the upper surface of a section of the base 6 from the left side stop block 7 to the slide block 5 is used as a plane source bearing surface 12.
One end of the bolt 10 is fixed on the sliding block 5 through a screw 11, and the other end of the bolt passes through the hole 8 to be connected with the handle 4. The handle 4 can be rotated to drive the bolt 10 to be screwed in or out along the hole 8.
The front side and the rear side of the base 6 are respectively provided with two hollow holes 9 in a hollow way. The hollow holes 9 penetrate through the upper surface and the lower surface of the base 6, so that the whole support is convenient to carry.
The support plate 2 is a rectangular flat plate, and a circular groove 1 is formed in the center of the upper surface of the support plate 2 and used for placing a circular detector to be detected. And designing a plurality of pallets 2 with different sizes according to the requirements of circular detectors with different sizes.
Most of the detectors are round or square, and in order to enable the bracket to meet the requirement of placing the round or square detectors, the invention adopts a combined design method. When the detector is a circular detector, the supporting plate 2 is arranged at the detector placing position 3 above the base 6 and between the left side stop block 7 and the sliding block 5, and the circular detector is placed in the groove 1; when the detector is a square detector, the supporting plate 2 is taken out, and the square detector is placed at the detector placing position 3 between the left side stop block 7 and the sliding block 5. The bolt 10 is moved by rotating the handle 4, which in turn pushes the slider 5 to tighten it with the probe. When the detector is fixed, the distance between the detector window and the planar source on the planar source-bearing surface 12 is 10mm.
When radioactive source detection is carried out, the distance between a beta plane source and a detector window is required to be 10mm, and the distance between an alpha plane source and the detector window is required to be 5mm. In order to meet the above requirements, a PE board is provided when performing α -plane source inspection. The PE plate is 5mm thick and is placed on the plane source bearing surface 12, the PE plate is made of non-polar thermoplastic resin with high crystallinity, has the characteristics of high toughness, tensile strength, corrosion resistance and wear resistance, and cannot deform or be thinned due to friction after being used for a long time. If the alpha plane source is used, the PE plate is inserted firstly, then the alpha plane source is placed on the PE plate, one end of the alpha plane source is clamped in the clamping groove of the left stop block 7, and the distance between the alpha plane source and the detector is shortened to 5mm. When the beta plane source is used, the beta plane source is directly placed on the plane source bearing surface 12, and one end of the beta plane source is clamped in the clamping groove of the left side stop block 7. The alpha plane source and the beta plane source have the same thickness.
The alpha and beta probe verification radiation source bracket can realize the verification of circular and square detectors with different sizes, the distance between a plane source and the detector is accurately adjustable, the requirement of verification regulations is met, the verification data is accurate, and the verification result is convincing.
Claims (7)
1. A radioactive source bracket for detecting alpha and beta probes is characterized in that alpha and beta surface pollution detector detectors are arranged at positions 5mm or 10mm above a plane source active area during detection, wherein alpha is 5mm, and beta is 10mm;
the method is characterized in that: comprises a handle (4), a slide block (5), a base (6), a bolt (10) and a screw (11);
the base (6) is a cuboid flat plate, the left side and the right side of the base (6) are respectively provided with two baffles, and the two baffles are parallel to each other and are both vertical to the upper surface of the base (6); a left side stop block (7) is arranged in front of the baffle plate on the left side of the base (6);
a hole (8) is formed in the center of the baffle on the right side of the base (6), threads are machined on the inner wall of the hole (8), and the hole is matched with a bolt (10); a sliding block (5) is arranged between the left side stop block (7) and the right side baffle plate of the base (6), the upper surface of a section of the base (6) between the left side stop block (7) and the sliding block (5) is used as a plane source bearing surface (12), and the plane source is arranged on the plane source bearing surface (12);
one end of the bolt (10) is fixed on the sliding block (5) through a screw (11), and the other end of the bolt passes through the hole (8) and is connected with the handle (4); the handle (4) can rotate, so that the bolt (10) is driven to screw in or out along the hole (8);
setting the position between the left side stop block (7) and the slide block (5) as a detector placing position (3) for placing a detector;
the bolt (10) is moved by rotating the handle (4), and then the sliding block (5) is pushed to be fastened with the detector;
adjusting the distance between the detector window and the plane source on the plane source bearing surface (12) according to the verification requirement;
the detector is characterized by further comprising a supporting plate (2), wherein the supporting plate (2) is a rectangular flat plate, and a circular groove (1) is formed in the center of the upper surface of the supporting plate (2) and used for placing a circular detector to be detected;
when the detector is a circular detector, the supporting plate (2) is arranged at the detector placing position (3) above the base (6) and between the left side stop block (7) and the sliding block (5), and the circular detector is placed in the groove (1);
when the detector is a square detector, taking out the supporting plate (2), and placing the square detector at a detector placing position (3) between the left side stop block (7) and the sliding block (5);
the device also comprises a PE plate, wherein the PE plate is placed on a plane source bearing surface (12), and a plane source is placed on the PE plate; the PE plate is used for adjusting the distance between the plane source and the detector window;
after the detector is fixed, the distance between the detector window and the plane source on the plane source bearing surface (12) is 10mm;
when the alpha plane source is used, the PE plate is placed on the plane source bearing surface (12), and then the alpha plane source is placed on the PE plate, so that the distance between the alpha plane source and the detector is shortened to 5mm;
when a beta planar source is used, the beta planar source is placed directly on the planar source carrying surface (12) such that the distance between the beta planar source and the detector is 10mm.
2. The α, β probe verification radiation source cradle of claim 1, wherein: a clamping groove is arranged at the lower part of the left side stop block (7), and one end of the plane source is clamped in the clamping groove of the left side stop block (7).
3. The alpha, beta probe verification radiation source stand of claim 2, wherein: the alpha plane source and the beta plane source have the same thickness.
4. The α, β probe verification radiation source cradle of claim 3, wherein: the front side and the rear side of the base (6) are respectively provided with a hollow hole (9), and the hollow holes (9) penetrate through the upper surface and the lower surface of the base (6).
5. The alpha, beta probe verification radiation source holder of claim 4, wherein: the front side and the rear side of the base (6) are respectively provided with two cavities (9), so that the whole support is convenient to carry.
6. The α, β probe verification radiation source cradle of claim 5, wherein: the PE plate is made of nonpolar thermoplastic resin with high crystallinity, high toughness, tensile strength, corrosion resistance and wear resistance, and the problems of deformation and friction thinning can not occur after long-time use.
7. The α, β probe verification radiation source cradle of claim 6, wherein: according to the requirements of circular detectors with different sizes, a plurality of supporting plates (2) with grooves (1) with different sizes can be designed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613982.XA CN109061709B (en) | 2018-06-14 | 2018-06-14 | Radioactive source bracket for detecting alpha and beta probes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613982.XA CN109061709B (en) | 2018-06-14 | 2018-06-14 | Radioactive source bracket for detecting alpha and beta probes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109061709A CN109061709A (en) | 2018-12-21 |
| CN109061709B true CN109061709B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810613982.XA Active CN109061709B (en) | 2018-06-14 | 2018-06-14 | Radioactive source bracket for detecting alpha and beta probes |
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| CN (1) | CN109061709B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932745B (en) * | 2019-04-15 | 2020-08-21 | 中国原子能科学研究院 | Universal environment and place radiation monitoring instrument verification support |
| FR3115370B1 (en) | 2020-10-16 | 2022-10-07 | Commissariat Energie Atomique | Device for calibrating a ground surface contamination detector and contamination detection system comprising such a calibration device |
| CN114019556A (en) * | 2021-10-09 | 2022-02-08 | 中国辐射防护研究院 | Portable earth's surface pollution measurement auxiliary device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986593Y (en) * | 2006-09-08 | 2007-12-05 | 中国工程物理研究院核物理与化学研究所 | A examine and determine frame for alpha, beta surface contamination appearance |
| CN203773066U (en) * | 2014-03-27 | 2014-08-13 | 国营第七五九厂 | Plane source calibrating device of nuclear detecting instrument |
| CN104316951A (en) * | 2014-11-05 | 2015-01-28 | 中国工程物理研究院核物理与化学研究所 | Portable large-area alpha and beta surface contamination detecting source box |
| CN204287496U (en) * | 2014-12-31 | 2015-04-22 | 刘志宏 | α, β surface contamination detection instrument automatic Verification/calibration/pick-up unit |
| CN105759302A (en) * | 2016-03-01 | 2016-07-13 | 中国原子能科学研究院 | System and method for uniformity measurement of large-area radioactive source |
-
2018
- 2018-06-14 CN CN201810613982.XA patent/CN109061709B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986593Y (en) * | 2006-09-08 | 2007-12-05 | 中国工程物理研究院核物理与化学研究所 | A examine and determine frame for alpha, beta surface contamination appearance |
| CN203773066U (en) * | 2014-03-27 | 2014-08-13 | 国营第七五九厂 | Plane source calibrating device of nuclear detecting instrument |
| CN104316951A (en) * | 2014-11-05 | 2015-01-28 | 中国工程物理研究院核物理与化学研究所 | Portable large-area alpha and beta surface contamination detecting source box |
| CN204287496U (en) * | 2014-12-31 | 2015-04-22 | 刘志宏 | α, β surface contamination detection instrument automatic Verification/calibration/pick-up unit |
| CN105759302A (en) * | 2016-03-01 | 2016-07-13 | 中国原子能科学研究院 | System and method for uniformity measurement of large-area radioactive source |
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| CN109061709A (en) | 2018-12-21 |
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