发明名称 |
PIPE BASE REPAIR METHOD AND NUCLEAR REACTOR VESSEL |
摘要 |
A nozzle repair method and a nuclear reactor vessel include: removing a trepanning portion (208) as a connection portion with respect to an in-core instrumentation cylinder (204) in a groove-welding portion (206); removing the in-core instrumentation cylinder (204) from a semi-spherical portion (66) as a lower end plate; forming a surface buttered-welding portion (210) by buttered-welding the surface of the groove-welding portion (206); forming a welding groove (212) by grooving the surface buttered-welding portion (210); inserting a new in-core instrumentation cylinder (204A) provided with a circumferential groove portion (204f) outside an instrumentation equipment guide passage (204d) into an attachment hole (203); and fixing the new in-core instrumentation cylinder (204A) by groove-welding the welding groove (212). Accordingly, since the nozzle welding area is suppressed to a predetermined range, the workability of the repair is improved. |
申请公布号 |
EP2940694(A4) |
申请公布日期 |
2016.08.03 |
申请号 |
EP20130866884 |
申请日期 |
2013.12.24 |
申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD. |
发明人 |
NISHIMURA, TSUYOSHI;YAMAMOTO, TAKESHI;SAKASHITA, HIDESHI;TSUBOI, KENSUKE;SATO, TOMONOBU |
分类号 |
G21C19/02;G21C13/00;G21C13/036;G21C17/003;G21C17/017;G21C17/10;G21C19/20 |
主分类号 |
G21C19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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