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Nuclear fuel reprocessing plant plutonium product transfer device

A transfer device and nuclear fuel technology, applied in nuclear engineering, reactors, shielding, etc., can solve the problems of insufficient shielding effect, high dose of exposure to personnel, and low dose of exposure, so as to reduce the risk of gamma radiation and reduce the dose of occupational exposure , Improve the effect of shielding performance

Inactive Publication Date: 2018-08-17
CHINA NUCLEAR POWER ENG CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0011] The purpose of the present invention is to optimize the shielding design of the plutonium product transfer device in the nuclear fuel reprocessing plant, propose a shielding design scheme that can effectively reduce the exposure dose of workers, and solve the insufficient shielding effect existing in the current design when the plutonium product cup is operated and transported As a result of the problem of excessive exposure dose to personnel, ensure that the exposure dose to the staff is as low as possible when working in the surrounding area, and it is applied to the plutonium product transfer device of the nuclear fuel reprocessing plant

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  • Nuclear fuel reprocessing plant plutonium product transfer device

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Combined with the material selection in Table 1, it is necessary to select a combination of hydrogen-containing low Z + high Z to shield α particles, β rays, γ rays and neutrons, and considering the stability of the device structure, a three-layer structure is adopted .

[0029] After preliminary calculation and analysis of radiation shielding and referring to the current design of typical plutonium product cups, the three-layer shielding structure design adopted by this transfer device is as follows: figure 2 As shown, the shielding layer of a plutonium product transfer device in a nuclear fuel reprocessing plant provided by the present invention is composed of a first stainless steel shielding layer 1 on the innermost side, a second stainless steel shielding layer 3 on the outermost side, and a stainless steel shielding layer located on the fi...

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Abstract

The invention belongs to the technical field of nuclear fuel reprocessing plant radioactive material radiation shielding design, and particularly relates to a nuclear fuel reprocessing plant plutoniumproduct transfer device. The device is used for containing plutonium product cups containing plutonium products in a sealed mode. A shielding layer comprises a first stainless steel shielding layer,a neutron shielding layer and a second stainless steel shielding layer which are sequentially arranged from inside to outside. The first stainless steel shielding layer is used for shielding alpha particles and part of beta rays and gamma rays emitted by the plutonium product cups. The neutron shielding layer is used for shielding neutrons emitted by the plutonium products. The second stainless steel shielding layer is used for shielding the gamma rays and bremsstrahlung photons and secondary photons generated after passing of the neutron shielding layer. By means of the device, neutron rays and the gamma rays can be greatly reduced, the neutron and photon radiation risk generated in the transferring process of the plutonium product cups is greatly reduced, and meanwhile the alpha particles and the beta rays can be completely shielded and the stability of the device is considered.

Description

technical field [0001] The invention belongs to the technical field of radiation shielding design for radioactive materials in nuclear fuel reprocessing plants, and in particular relates to a transfer device for plutonium products in nuclear fuel reprocessing plants. Background technique [0002] After a period of storage, the spent fuel unloaded from the nuclear power plant will be transported to the nuclear fuel reprocessing plant for processing, and the fuel that can be reused for production will be extracted. Spent fuel reprocessing generally goes through processes such as chemical shearing, dissolution, purification, purification, and collection. Finally, the extracted and produced plutonium products will be placed in product cups and stored in product banks. Because plutonium products have certain radioactivity, it is necessary to use a shielding transfer device to transport them during the process of entering and exiting the warehouse. When the transfer device is in ...

Claims

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Application Information

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IPC IPC(8): G21F1/08G21F1/12
CPCG21F1/08G21F1/125
Inventor 李卓然陈宗欢田英男王炳衡王晓霞米爱军高桂玲毛亚蔚
Owner CHINA NUCLEAR POWER ENG CO LTD
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