Abstract
In the Fugen Nuclear Power Plant, we are going to conduct appropriate classification of the waste according to the contamination level of the material of the plant, to reduce the amount of radioactive waste and to promote dismantling work rationally and efficiently. For this reason, we are going to apply the clearance system to the dismantled material generated from dismantling work of the turbine system, and to reduce the radioactive waste amount as much as possible. In order to operate the clearance system properly, the target nuclides need to be selected accurately, and the evaluation method of radioactive concentration should be established. The assessment was conducted as follows. (1)Selection of the target nuclides for evaluation Ten target nuclides for the clearance evaluation were selected such as H-3, Mn-54, Co-60, etc. based on the investigation on both activation contamination and secondary contamination with consideration for the plant characteristics. (2)Establishment of the evaluation method of radioactive concentration The evaluation method of the radioactive concentration of the target nuclides was verified properly based on the analysis data obtained by sampling from the contaminated components in Fugen NPP.
