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    • 9. 发明公开
    • Method of executing water jet peening
    • Verfahren zurWasserstrahlungsdurchführung
    • EP2612931A2
    • 2013-07-10
    • EP12199657.3
    • 2012-12-28
    • Hitachi-GE Nuclear Energy, Ltd.
    • Aoki, TakahiroYoshikubo, FujioKanno, Akihiro
    • C21D7/06C21D9/08C21D9/50B23P17/00G21D1/00
    • B24C1/10C21D1/00C21D7/06C21D9/08C21D9/50G21C19/207G21D1/00
    • A top head forming a top head of a reactor pressure vessel is provided with a plurality of control rod drive mechanism (CRDM) penetration pipes arranged in a square grid-like pattern. The CRDM penetration pipes are joined with one another by a tube support member disposed among them. The top head is placed on a tank and water is filled in an inner region of the tank and the top head. A travel apparatus moves a nozzle lifting/lowering apparatus to a predetermined location and a lifting/lowering mechanism is operated to lift a jet nozzle 1 above the tube support member in the neighboring four CRDM penetration pipes. An ejection outlet of the jet nozzle is directed to a weld between one of the CRDM penetration pipes and the top head 18, and a water jet is ejected to start WJP. A nozzle turning mechanism turns the jet nozzle, and WJP is executed sequentially to the four CRDM penetration pipes.
    • 形成反应堆压力容器的顶部顶部的头部设置有以方格栅格图案布置的多个控制棒驱动机构(CRDM)穿透管。 CRDM穿透管通过设置在其中的管支撑构件彼此连接。 顶部放置在罐体上,水被填充在罐体的内部区域和顶部的顶部。 旅行装置将喷嘴升降装置移动到预定位置,并且操作提升/降低机构以在相邻的四个CRDM穿透管中的管支撑构件上方提升喷嘴1。 喷射喷嘴的喷出口被引导到一个CRDM穿透管和顶部头18之间的焊缝,喷射水流以启动WJP。 喷嘴转动机构转动喷嘴,并且顺序地执行WJP到四个CRDM穿透管。