| 摘要 |
PROBLEM TO BE SOLVED: To provide a chemical decontamination method for shortening furthermore a decontamination time. SOLUTION: Chemical decontamination is performed for a recirculation system A (A-system) and a recirculation system B (B-system) of a boiling water reactor nuclear power plant. Water is filled into the A-system and circulated to raise a temperature of the A-system. Then, the water in the A-system is transferred into the B-system and circulated to raise a temperature of the B-system. After the temperature rise, while transferring the water in the B-system into the A-system, oxidization decontamination liquid containing an oxidization decontamination agent is injected into the water. Oxidization decontamination of the A-system and oxidization decontamination of the B-system are executed successively by circulating the oxidization decontamination liquid. Reduction decontamination liquid containing a reduction decontamination agent is injected to decompose the oxidization decontamination agent, and then reduction decontamination of the A-system and the B-system by the reduction decontamination liquid is executed alternately. After finish of the reduction decontamination, the reduction decontamination agent is decomposed, while transferring the reduction decontamination liquid reciprocally between the B-system and the A-system. After finish of decomposition of the reduction decontamination agent, a purification process is executed, while transferring the water between the A-system and the B-system. COPYRIGHT: (C)2009,JPO&INPIT
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