Method to prevent stress corrosion cracking of storage canister and storage canister
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United States of America Patent
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Nov 29, 2016
Grant Date -
Aug 18, 2016
app pub date -
Mar 7, 2014
filing date -
Mar 7, 2014
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Abstract
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.
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