P23-16 解体後除染技術の開発

概要

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This paper describes a status of development of decontamination techniques by NUPEC for dismantled equipment generated in decommissioning of nuclear power plant. Steam Rising Units (SRU) in Tokai NPS which is now decommissioning was chosen as an object of the decontamination tests. Dismantling of SRU will produce large quantities of radioactive metal waste, and if they could be decontaminated until the clearance level, they could be released as non-active waste. Decontamination methods were selected based on the investigation of oxide film deposited on the metal surface, and the physical (blasting) and chemical decontamination tests, and chemical decontamination liquid waste treatment tests were conducted to verify the performance. The result shows that the combined with blasting and chemical decontamination process can remove easily radioactivity from SRU waste until the clearance level, and it can decrease the cost for disposal compared with direct disposal.
社団法人日本機械学会の論文
2002-06-14