[2D01-09] System Development and Evaluation

[2D01] Experimental Evaluation of Estimation method of Radioactive Concentration

*Yasushi Nagumo¹, Takahiro Tadokoro¹, Yuichiro Ueno¹, Toshihisa Tsukiyama², Hideki Yamai², Takashi Kitahara² (1. Hitachi, Ltd., Research & Development Group, Center for Technology Innovation-Energy, 2. Hitachi-GE Nuclear Energy, Ltd.)

Keywords:Decommissioning, Radioactive waste, Evaluation of radioacitivity concentration, Maximum a posteriori, Monte Carlo Simulation

We have been developing an estimation method of radioactivity concentration in a square-shaped container. In this method, the distribution of radioactivity concentration in the container is estimated by comparing simulated gamma ray spectra with measured ones. We confirmed the concentration can be estimated with an error of about 40% by experiment.