Investigation on estimation method for the characterization of highly radioactive waste using non-destructive measurement data

Bernard, P.*; Met, F.*; Gerard, D.*; 小嶋 健*; 駒 義和  

Bernard, P.*; Met, F.*; Gerard, D.*; Kojima, Ken*; Koma, Yoshikazu

An evaluation model to estimate the parameters of waste management from the non-destructive measurement of the radiation was proposed. Based on this, the implementation example of estimating from non-destructive analysis of key-nuclides (Cs, Co, Eu) in radioactive waste was proposed and issues to be solved for implementation was organized and investigated. The target are waste generated in the frame of the decommissioning of the Fukushima Daiichi NPP after the severe accident, with a very high dose rate (10 Sv/h on the surface of the container). Using Monte Carlo simulations, a measurement system was studied in order to verify the adequacy between these circumstances and the capacity of the system to respond to them, especially for the measurement range and the performances for detection limit. In addition, issues and solution policy for the system implementation was also examined.