Analysis and discussion of 58Co peak of PWR nuclear power plant oxidation operation
During the third cycle refueling overhaul of Unit 4 of a nuclear power plant,a large number of activated corrosion products(58 Co)was released in the primary coolant during the oxidation operation,which had a great impact on radiation protection and the duration of the overhaul.Taking into consideration with the operating conditions of the third fuel cycle of Unit 4,this paper carries out a systematic analysis from the aspects of corrosion,migration deposition,purification,activation and dissolution.This paper summarizes three reasons for the high peak value of 58 Co in oxidation operation during the third cycle refueling overhaul of Unit 4.At the same time,relevant suggestions are put forward to reduce the peak value of 58 Co in oxidation operation and reduce the overhaul period occupied by purification process.
国家科技期刊平台
NSTL
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