[3A01-08] Radiation Shielding Radiation Behaviors

[3A01] Technology Development to Evaluate Dose Rate Distribution and to Search for Fuel Debris Submerged in Water for Decommissioning of Fukushima Daiichi Nuclear Power Station

(8) Prediction of the three-dimensional dose rate distribution in primary containment vessel

*Keisuke Okumura¹, Eka Sapta Riyana¹, Wakaei Sato², Hirobumi Maeda², Jun-ichi Katakura³ (1. JAEA, 2. NESI, 3. Nagaoka University of Technology)

Keywords:Fukushima Daiichi nuclear power station, decommissioning, fuel debris retrieval, dose rate distribution, Monte Carlo calculation

The three-dimensional dose rate distribution at the end of 2021 in the primary containment vessel of the Fukushima Daiichi nuclear power station was predicted by combining various numerical calculations such as Monte Carlo calculation and measured data obtained in the internal investigations.