Radioactivity analysis of metal samples taken from pipes of the Fugen, 5

Haraga, Tomoko   ; Tobita, Minoru*; Takahashi, Shigemi*; Seki, Kotaro*; Izumo, Sari ; Shimomura, Yusuke; Ishimori, Kenichiro ; Kameo, Yutaka 

Fugen Nuclear Power Station was shut down and now is under decommissioning. Many radioactivity concentration data of dismantled materials have to be accumulated to calculate the scaling factors of radioactive wastes and to verify that the cleared dismantled materials conform to the clearance levels. A simple and rapid radioactivity determination method for radioactive waste samples was developed by Department of Decommissioning and Waste Management. For its demonstration, the simple and rapid radioactivity determination method was applied to metal samples, which were taken from dismantled pipes in contact with heavy water or carbon dioxide gas of Fugen. This report summarizes the radioactivity data obtained from the analysis of those samples.