NOZZLE STUB REPAIRING METHOD AND NUCLEAR REACTOR VESSEL

NOZZLE STUB REPAIRING METHOD AND NUCLEAR REACTOR VESSEL

PROBLEM TO BE SOLVED: To improve workability by easily performing repair work and reduce repairing cost, in a nozzle stub repairing method and a nuclear reactor vessel.SOLUTION: A nozzle stub repairing method comprises the steps of: removing a connection part (trepanning process part 208) connecting...

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Bibliographische Detailangaben
Hauptverfasser: SAKASHITA EIJI, NISHIMURA TAKESHI, YAMAMOTO TAKESHI, HORI NOBUYUKI, HAMAMOTO CHIGEN
Format: Patent
Sprache:eng
Schlagworte:
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Zusammenfassung:PROBLEM TO BE SOLVED: To improve workability by easily performing repair work and reduce repairing cost, in a nozzle stub repairing method and a nuclear reactor vessel.SOLUTION: A nozzle stub repairing method comprises the steps of: removing a connection part (trepanning process part 208) connecting with an in-core instrumentation cylinder 204 in a groove weld part 206; removing the in-core instrumentation cylinder 204 from a lower hemispherical part 66; processing a plug mounting opening part 211 by removing the groove weld part 206; and welding and fixing a plug 212 to the plug mounting opening part 211.