Nuclear reactor nozzle repair method
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United States of America Patent
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Jul 17, 2018
Grant Date -
Dec 3, 2015
app pub date -
Dec 24, 2013
filing date -
Dec 28, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
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 lower end plate (66); forming a plug attachment opening (211) by removing the groove-welding portion (206); applying a pressing load to the lower end plate (66) by attaching a plug (212) to the plug attachment opening (211); and welding and fixing the plug (212) attached to the plug attachment opening (211). Accordingly, since a repair is easily performed, it is possible to improve the workability and to decrease a repair cost.
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