[2B10-15] Decommissioning of Fukushima Daiichi NPP 3

[2B15] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(6)Computational method validation and effectiveness evaluation of an estimation system of radiation sources and dose rates

*Yuto Aoki¹, Rintaro Ito¹, Akihiro Kitamura¹, Takazumi Omori¹, Tatsuro Taniguchi¹, Hiroshi Ide¹ (1. JAEA)

Keywords:radiation source distribution, air dose rate distribution, validation test, effectiveness evaluation

In this report, we present the validation results of the radiation source inverse estimation computation method and the effectiveness evaluation method of the "estimation system of radiation sources and dose rates" developed by JAEA. As for the validation test, the JMTR was used as the evaluation site, and the results of radiation source inverse estimation computations were compared with measured data. As a result, it was confirmed that the hot spot could be estimated approximately well. As for the effectiveness evaluation, the test field to be established at the NARREC and at the JMTR were used as the evaluation sites, and the effectiveness evaluation items such as the functions of each tool and the process of the system were summarized.