Maintenance method of MOX equipment

A technology for equipment maintenance and equipment, applied in nuclear power generation, climate sustainability, shielding, etc., can solve problems such as equipment maintenance difficulty, and achieve the effect of reducing radiation levels, ensuring safety, and avoiding radioactive leakage.

Inactive Publication Date: 2018-01-23
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high radiation characteristics of MOX production, great requirements are placed on

Method used

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Example Embodiment

[0021] The present invention will be described in detail below in conjunction with specific embodiments.

[0022] MOX equipment maintenance method of the present invention comprises the following steps:

[0023] Step 1: Transfer the radioactive materials in the glove box to be overhauled to the adjacent glove box.

[0024] Radioactive articles include production materials, pellet products, radioactive solid waste, etc.

[0025] Step 2: After sealing the glove box, reduce the radioactive level in the glove box through air circulation and vacuuming.

[0026] The dry and dust-removed compressed air is introduced into the glove box by means of an external air pipeline, and at the same time, the fan outside the glove box is used to discharge the air in the glove box to form air circulation and reduce the aerosol level in the glove box. Intermittent throughout the entire maintenance process. After the air circulates for a period of time, the operator operates through the glove ho...

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Abstract

The invention belongs to the technical field of nuclear industry maintenance and particularly relates to a maintenance method of MOX equipment. The maintenance method includes: transferring radioactive objects in a to-be-maintained glove box into an adjacent glove box; sealing the to-be-maintained glove box, and using air circulation and dust collection to lower the radioactive level in the to-be-maintained glove box; performing chemical decontamination on workbench surfaces, wall faces and equipment surfaces in the to-be-maintained glove box; performing dose analysis on the radioactive levelin the to-be-maintained glove box; if the radioactive level in the to-be-maintained glove box meets radioactivity regulations, allowing operation staff to enter the to-be-maintained glove box; if theradioactive level in the to-be-maintained glove box does not meet the radioactivity regulations, continuing the third step until the radioactive level meets the radioactivity regulations; building a gas tent in a preparation area to prevent radioactive contamination from being brought to the outside; allowing the operation staff wearing special protective garments to enter the to-be-maintained glove box to perform maintenance. By the method, the radioactive level can be lowered evidently, the safety of maintenance workers can be guaranteed, radioactive leakage can be avoided, and operation safety under high-radiation work conditions is achieved.

Description

technical field [0001] The invention belongs to the technical field of repair and maintenance in the nuclear industry, and in particular relates to a method for repairing MOX equipment. Background technique [0002] The MOX fuel plant is the intermediate link between the reprocessing plant and the pressurized water reactor and fast reactor, and is the key link to realize the closed cycle of nuclear fuel in my country. Domestic MOX fuel pellet production adopts the glove box enclosure method. Compared with the hot chamber enclosure method, the operation is more convenient. Some equipment maintenance does not require operators to enter the glove box, and only operators need to operate through the glove hole. It is greatly reduced, decontamination becomes easier, and the risk of excessive radiation dose of maintenance personnel is greatly reduced. However, for some large equipment, even the glove box, operators still need to enter the glove box for maintenance. Due to the hig...

Claims

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Application Information

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IPC IPC(8): G21C17/06G21F9/00G21F3/02
CPCY02E30/30
Inventor 潘传龙艾利君周国梁杨廷贵张顺孝王斌孙江孙世亮丁辉孙明刚
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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