[3F05-08] Fukushima Daiichi Accident

[3F06] Estimation of plant condition of Fukushima Daiichi Nuclear Power Station

(3)Estimation of Core Damage Process

*Naotoshi Tominaga¹, Masashi Himi¹, Koichi Nakamura² (1. Advancesoft, 2. Central Research Institute of Electric Power Industry)

Keywords:Fukushima Accident, Unit 1 ~ 3, severe accident, core damage, Radionuclide, CAMS, lower head failure, characteristics of debris

Due to the Great East Japan Earthquake that occurred on March 11, 2011, Fukushima Daiichi Nuclear Power Station Units 1 to 3 had experienced a severe accident accompanying core melting. We surveyed analyzed Units 1 to 3 in order to understand the situation of the accident and we estimated the process of core damage from released fission product and from our estimation of damage in core at the accident to explain the process.