TY - GEN
T1 - Evaluation of irradiation effects on concrete structure-background and preparation of neutron irradiation test
AU - Maruyama, Ippei
AU - Kontani, Osamu
AU - Sawada, Shohei
AU - Sato, Osamu
AU - Igarashi, Go
AU - Takizawa, Masayuki
PY - 2013
Y1 - 2013
N2 - Methods for assessing the soundness of concrete exposed to irradiation are being developed within the framework of a project of the Nuclear Regulation Authority (NRA) "Japan Ageing Management Program for System Safety". This paper presents the background of this project and recent research works. The major reason for deterioration of concrete under irradiation conditions is expansion of aggregate due to neutron and gamma-ray irradiation. Dislocation of atoms in covalent structures of aggregate minerals, and resultant lattice constant change and alteration to amorphous phase are produced by fast neutrons. In addition, through electronic exertion, some energy deposition is accumulated as permanent distortion/strain in atomic structures. Other effects are also summarized. We plan to conduct a neutron irradiation test from May 2013. In selecting mix proportions and concrete components for the irradiation test program, sample size as a function of capsule size and gamma-heating, cement type, and aggregate size and type are determined based on preliminary experiments.
AB - Methods for assessing the soundness of concrete exposed to irradiation are being developed within the framework of a project of the Nuclear Regulation Authority (NRA) "Japan Ageing Management Program for System Safety". This paper presents the background of this project and recent research works. The major reason for deterioration of concrete under irradiation conditions is expansion of aggregate due to neutron and gamma-ray irradiation. Dislocation of atoms in covalent structures of aggregate minerals, and resultant lattice constant change and alteration to amorphous phase are produced by fast neutrons. In addition, through electronic exertion, some energy deposition is accumulated as permanent distortion/strain in atomic structures. Other effects are also summarized. We plan to conduct a neutron irradiation test from May 2013. In selecting mix proportions and concrete components for the irradiation test program, sample size as a function of capsule size and gamma-heating, cement type, and aggregate size and type are determined based on preliminary experiments.
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U2 - 10.1115/POWER2013-98114
DO - 10.1115/POWER2013-98114
M3 - Conference contribution
AN - SCOPUS:84896267157
SN - 9780791856062
T3 - American Society of Mechanical Engineers, Power Division (Publication) POWER
BT - RAM; Plant Syst., Struct., Components and Mat. Issues; Simple and Combined Cycles; Adv. Energy Syst. and Renewables (Wind, Solar and Geothermal); Energy Water Nexus; Thermal Hydraulics and CFD;
PB - American Society of Mechanical Engineers
T2 - ASME 2013 Power Conference, POWER 2013
Y2 - 29 July 2013 through 1 August 2013
ER -