NOZZLE REPAIRING METHOD AND NUCLEAR REACTOR VESSEL
摘要
It is possible to improve the workability and the stress corrosion resistance by easily performing a repairing operation in a nozzle repairing method and a nuclear reactor vessel. The repairing method includes: removing a first connection portion ((trepanned portion) 208) with respect to an in-core instrument tube (204) in a groove-welding portion (206); removing the in-core instrument tube (204) from a lower mirror (66); leaving and grooving a second connection portion ((existing welding portion) 211) with respect to the lower mirror (66) in the groove-welding portion (206); inserting a new in-core instrument tube (204A) into an attachment hole (203); and groove-welding (so as to form a new groove-welding portion (213)) the inner side of the lower mirror (66) so as to fix the new in-core instrument tube (204A).
申请公布号
US2014064431(A1)
申请公布日期
2014.03.06
申请号
US201313853610
申请日期
2013.03.29
申请人
MITSUBISHI HEAVY INDUSTRIES, LTD.;MITSUBISHI HEAVY INDUSTRIES, LTD.