Affiliation: | a Japan Atomic Energy Agency, 4002 Narita, Oarai, Higashi-ibaraki-gun, Ibaraki 311-1393, Japan b Japan Atomic Power Company, 4002 Narita, Oarai, Higashi-ibaraki-gun, Ibaraki 311-1393, Japan c Hitachi-GE Nuclear Energy, Ltd., 3-1-1, Saiwai, Hitachi, Ibaraki 317-0073, Japan |