川崎製鉄技報 KAWASAKI STEEL GIHO
Vol.12 (1980) No.1
原子炉格納容器用鋼板の材質特性と溶接性
Material Property and Weldability of Primary Containment Vessel Steel Plate for Nuclear Plant
田 中 康 浩 (Michihiro Tanaka) 西山 昇 (Noboru Nishiyama) 広瀬 圭介 (Keisuke Hirose) 千貫 昌一 (Shoichi Sengan) 関根 稔弘 (Toshihiro Sekine) 楠原 祐司 (Yuji Kusuhara) 要旨 : 原子炉格納容器に使用される鋼材の現況を，とくに最近拡大適用されることになった板厚 45mm の厚肉 SGV49 鋼と板厚 38mm の高張力 SPV50 鋼の溶接性および靭性に関する諸特 性に主体をおいて紹介した。これらの材料は，従来から用いられ多くの実績をもつ板厚 38mm までの SGV49 鋼の特性と，ほとんど同等にあつかうことができ，格納容器鋼材とし ての溶接性，靭性にすぐれ，破壊に対する安全性を十分保証し得ることを破壊力学的にも 実証した。 Synopsis :
Steel plates for primary containment vessels of nuclear power plants are described. As the nuclear power plants are getting larger with severe safety design requirement,it is necessary to use a high strength steel having a higher tensile strength than ordinary SGV49 steel or to use a SGV49 steel plate thicker than 38mm. For these purposes, various properties have been investigated of high tensile, 38mm thick SPV50 and 45mm thick SGV49 steels. The mechanical properties, weldabilities and fracture toughness of these steel plates and their weld joints are proved safe enough to be used for containment vessel without stress relief heat treatment as well as the conventional SGV49 steel.
(c)JFE Steel Corporation, 2003
