2023 Fall Meeting

Presentation information

Oral presentation

IV. Nuclear Plant Technologies » 402-1 Nuclear Safety Engineering (Safety Design, Safety Assessment/Analysis, Management)

[2O19-22] Aging Management

Thu. Sep 7, 2023 4:55 PM - 6:00 PM Room O (School of Eng. Bildg. 2F 522)

Chair:KOSUKE NAMBA(CRIEPI)

5:40 PM - 5:55 PM

[2O22] Radiation Effects on Concrete Structure for Aging management

(4)Estimation of the Reference Values of Radiation Effects on Concrete Structure

*Masaki Kawai Kawai1, Junji Etoh1, Kiyoteru Suzuki1, Kenta Murakami2, Takahiro Ohkubo3, Shohei Sawada4, Ippei Maruyama2 (1. MRI, 2. UTokyo, 3. Chiba Univ., 4. KAJIMA)

Keywords:Material, Concrete, Radiation effect, Reference value

Among the aging managements for light water reactors, the effects of neutron irradiation on concrete structures which are difficult to replace were expected to vary depending on the type of aggregate used in the concrete.
Using the results of neutron irradiation experiments of the aggregates utilized on nuclear power plants in Japan and the evaluation results of a rigid-body spring model that can evaluate the radiation effects on concrete from the radiation effects of aggregates, a strength-degradation table was evaluated for each aggregate by neutron irradiation to concrete.
The reference values for radiation effects on concrete were estimated by the strength-degradation table.