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Radiation protection method for MOX pellet preparation process

A preparation process and radiation protection technology, applied in the field of radiation protection of MOX pellet preparation process, can solve the problems of high-tech radiation protection, operator hazards, inability to achieve the radiation protection capability of MOX fuel pellets, etc., and achieve the effect of ensuring safety.

Active Publication Date: 2018-03-30
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

At the same time, during the production of MOX fuel pellets, a large amount of flying powder is inevitably produced. If the aerosol containing radioactive dust leaks, it will cause great harm to the operators, and extremely high requirements for process radiation protection are required.
Traditional fuel pellet manufacturing radiation protection devices and methods simply cannot meet the radiation protection capability required by MOX fuel pellet manufacturing

Method used

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  • Radiation protection method for MOX pellet preparation process

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The radiation protection method of the MOX pellet preparation process of the present invention is as follows:

[0025] The key equipment of the production line is enclosed by a glove box, which is the most basic and main way of radiation protection. Such as figure 1 As shown, the glove box structure mainly includes an inner shell and an outer shielding material. The frame of the inner shell is integrally processed, 304 stainless steel material, the thickness is small, about 5-10mm, integrally formed or welded. The integrated structure avoids the need to add a sealing structure at the connection due to the block design, reducing the risk of leakage. The inner shell is only used as an α-radiation shield and provides the mechanical strength of the entire glove box. Its ability to shield other radiation is weak. At this time, a certain ...

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Abstract

The invention belongs to the technical field of nuclear chemical radiation protection and in particular relates to a radiation protection method for an MOX pellet preparation process. Key equipment ona production line is enclosed by using glove boxes; the whole production line is formed by sequentially connecting a plurality of glove boxes; radioactive aerosol is used as an atmosphere in each glove box; each glove box is matched with an independent mechanical pump; the front end of the mechanical pump is designed to be provided with a filter-cloth-type efficient dust filter; the mechanical pump has the effect of making the average pressure inside each glove box smaller than the normal atmosphere pressure 300kPa; the glove box with the highest radiation level is placed in the middle of theproduction line; the radiation level of the glove box closer to the outer side is lower; the pressure of the glove box with a higher radiation level is lower; the pressure difference of the adjacentglove boxes is 20kPa; a sealing door with a sealing ring is designed at a junction between every two glove boxes; and the sealing door is closed under the condition that materials are not transferred.A whole set of radiation protection, detection and dirt removal method is established, the safety production of MOX fuel pellets is realized, and the safety of production operating personnel is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of nuclear chemical industry radiation protection, and in particular relates to a radiation protection method for the preparation process of MOX pellets. Background technique [0002] The production of MOX fuel pellets uses mixed powder of plutonium dioxide and depleted uranium dioxide as raw materials, and undergoes powder metallurgy processes such as granulation, pressing, and sintering to produce fuel pellets that can be applied to fast reactor power generation. Traditional fuel pellets use natural uranium or slightly enriched uranium powder as raw materials to manufacture fuel pellets, and the radiation intensity is relatively small. The main protection is to prevent internal exposure to alpha rays, that is, to avoid inhalation of raw material powder into the human body. The semi-enclosed production method can be used in the production process, that is, the fuel pellets are exposed in the production work...

Claims

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Application Information

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IPC IPC(8): G21F3/035
CPCG21F3/035
Inventor 潘传龙陈永红周国梁杨廷贵艾利君张顺孝王帅
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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