Shielding device for high-reflective material and application of device

A shielding device and high-radiation technology, which is applied in the field of shielding devices for high-radiation materials and γ-ray shielding devices, can solve the problems of strong radiation hazards, surrounding environment and operator injury, etc., and achieve good shielding effect and good shielding protection effect, process continuous effect

Active Publication Date: 2018-06-19
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the RPV steel samples after nuclear reactor irradiation treatment have extremely strong radiation hazards. If there is no perfect shielding treatment method and device, it will inevitably cause great harm to the surrounding environment and operators. , providing a shielding device for highly radioactive materials and its application

Method used

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  • Shielding device for high-reflective material and application of device
  • Shielding device for high-reflective material and application of device
  • Shielding device for high-reflective material and application of device

Examples

Experimental program
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Effect test

Embodiment 1

[0069] The shielding sample is a steel ingot processed by a civil nuclear reactor, and its dimensions are 27.5mm×10mm×10mm (length×width×height).

[0070] The dose equivalent rate on the surface is as high as 2247.48mSv / h without shielding. Using the device and method of this embodiment, the RPV steel sample is fixed inside the shielding cavity, and the second stud is screwed to reach the designated position to realize the shielding cavity The radiation dose is detected near the second stud on the surface of the shielded cavity. The test results showed that the gamma-ray dose equivalent rate was 29.0μSv / h, and no beta-ray was detected.

[0071] Close the lid, and test the radiation dose in the axial direction of the second stud. The test results show that no β-rays are detected, and the dose equivalent rates of γ-rays are 17.2μSv / h and 19.5μSv / h, respectively. The result meets the limit value of the radiation level on the surface of packages and means of transport in GB11806-...

Embodiment 2

[0073] The highly radioactive RPV steel samples were machined, and the target size was 10mm×10mm×0.8mm (length×width×height).

[0074] Open the barrel cover, unscrew and withdraw the second stud, and perform radiation dose rate detection at a position 0 cm away from the surface of the shielding cavity in the normal direction of the second stud. The test results showed that the dose equivalent rate of gamma rays was 1.55mSv / h, and no beta rays were detected.

[0075] Screw the first stud until 1cm is exposed at the front end of the RPV steel sample, that is, the processing position is reached. like image 3 As shown, in direction 1, the radiation dose rate detection is carried out on the surface of the RPV steel sample, and the test results show that the β-ray dose equivalent rate is 4.6mSv / h, and the gamma-ray dose equivalent rate is 6.0mSv / h.

[0076] In direction 2, the radiation dose rate detection was carried out on the surface of the RPV steel sample, and the test resul...

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Abstract

The invention discloses a shielding device for a high-reflective material and application of the device. The problem that an RPV steel sample obtained after being irradiated with a nuclear reactor hasextremely high harm, and no perfect shielding method or device exists is solved. The high-reflective material is an RPV steel experimental sample obtained after being treated and irradiated with thenuclear reactor for a long time, in other words, the invention provides the shielding device aiming at RPV steel obtained after being irradiated with the nuclear reactor and a processing method and application of the device, and relates to a ray shielding technology and method for the high-reflective material in the long process transportation and processing processes. Accordingly, on the basis ofthe ray shielding theory and the material characteristics of depleted uranium, a novel portable shielding container is designed and made, harmful ray release of the PRV steel in the processes such aslong process turnover and machining can be effectively lowered, the safety in the transportation and machining processes is guaranteed, and the influence of the high-reflective material on the environment is lowered to the maximum extent.

Description

technical field [0001] The invention relates to the field of radiation shielding and protection, in particular to the field of radiation shielding of high-radiation materials, in particular to a shielding device for high-radiation materials and its application. More specifically, the present invention provides a gamma-ray shielding device and its application in the transportation and processing of high-radiation gamma-ray materials. The invention can meet the shielding requirements of high-radiation gamma ray materials in the process of processing and transportation, and has good application value. Background technique [0002] Based on the background of the localization of commonly used RPV steel (ie reactor pressure vessel material steel), an attempt was made to construct an RPV integrity evaluation system on a microscopic scale. China Guangdong Nuclear Power Engineering Design Co., Ltd., Nuclear Power Materials and Service Safety Joint Laboratory and other units cooperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F5/005G21F5/06G21F5/14G21F1/08
CPCG21F1/08G21F5/005G21F5/06G21F5/14
Inventor 李建军周勇郭亮杨苏刘刚景林
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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