[1C14-18] Concrete 3

[1C17] Study on the Radionuclide Contamination Mechanisms of Concrete and the Estimation of Distribution of Radionuclides

(24)Estimate the amount of radioactive pollution in cracked concrete

*Hideyuki Hokora¹, Kazutoshi Shibuya¹, Kazuo Yamada², Ippei Maruyama^3,4 (1. Taiheiyo Consultant, 2. NIES, 3. UTokyo, 4. Nagoya Univ.)

Keywords:Fukushima Daiichi Nuclear Power Station, Concrete, Crack, Cesium, Strontium, Air radiation dose, Estimation of waste amount

Based on the cracking simulation and mass transport calculation, prediction calculations of the amount of radioactive waste at the Fukushima Daiichi Nuclear Power Plant were performed. Calculations were performed for the basement of the reactor turbine building of Fukushima Daiichi Nuclear Power Plant Unit 1, simulating the inflow of radioactive cesium and strontium and seawater since the accident, and the amount of contaminated concrete was predicted. Furthermore, we estimated the air dose using the effective dose calculation code "QAD-CGGP2R" and evaluated the validity of the predicted amount of contaminated concrete by comparing with the measured value in the basement of the turbine building.