2パラメータ法破壊評価線図を用いたB-SUS鋼の弾塑性破壊評価

抄録

The basket of transport and storage cask must have enough mechanical property to support fuel assembly and play a role of critical control at all assumption phenomena which are being used. One of the basket materials which can be used for the cask is B-SUS304P-1 and this material is registered in the “Rules on Transport / Storage Packagings for Spent Nuclear Fuel (JSME S FA1-2007)” by the Japanese Society of Mechanical Engineers. B-SUS304P-1 shows ductile fracture behavior though Boron addition causes reduction of the elongation and fracture toughness of the material. Elastic-plastic fracture of B-SUS304P-1 was evaluated by using two-parameter approach fracture assessment diagram.