METHOD TO PREVENT STRESS CORROSION CRACKING OF STORAGE CANISTER AND STORAGE CANISTER

摘要

A method to prevent stress corrosion cracking of a storage canister 1, wherein stress corrosion cracking is prevented by applying a compressive stress to a range where a tensile residual stress is generated on a metallic body 2 by welding a cover 4 to a top 2a of the body 2. A first compressive stress is applied beforehand to a range L of the body 2 where a tensile residual stress is expected to be generated by the welding of the cover 4, the tensile residual stress is canceled by welding the cover 4 with a compressive residual stress generated in the range L, and then a second compressive stress is applied so as to generate a compressive residual stress over the range L.

主权项

1. A method to prevent stress corrosion cracking of a storage canister by applying a compressive stress to a range where a tensile residual stress is generated on a metallic cylindrical body by welding a cover to a top of the cylindrical body,
the method comprising: applying a first compressive stress beforehand to the range of the cylindrical body where the tensile residual stress is expected to be generated by the welding of the cover; canceling the tensile residual stress generated by the welding of the cover, with a compressive residual stress generated in the range; and then applying a second compressive stress so as to generate a compressive residual stress over the range.