公开(公告)号：US5553106A

公开(公告)日：1996-09-03

申请号：US490245

申请日：1995-06-14

申请人： Kunio Enomoto ,  Masahiro Otaka ,  Kazuo Amano ,  Koichi Kurosawa ,  Eisaku Hayashi ,  Ren Morinaka ,  Shigeo Hattori ,  Kasunori Sato

发明人： Kunio Enomoto ,  Masahiro Otaka ,  Kazuo Amano ,  Koichi Kurosawa ,  Eisaku Hayashi ,  Ren Morinaka ,  Shigeo Hattori ,  Kasunori Sato

IPC分类号： C21D7/06 ,  G21C13/087 ,  G21C19/00

CPC分类号： C21D7/06 ,  G21C13/087 ,  G21Y2002/10 ,  G21Y2002/301 ,  G21Y2004/20 ,  G21Y2004/302 ,  G21Y2004/50 ,  Y02E30/40

摘要： Low temperature water in a low temperature water tank 12 installed outside a reactor pressure vessel 9 is pumped by a high pressure pump 15 and supplied through a conductor 17 under pressure. The supplied water is ejected, as a stream of cold water jet 8, from a nozzle 14 connected to the conductor 17 and introduced into the reactor pressure vessel 9 by a driving mechanism. The stream of cold water jet 8 ejected from the nozzle 14 is directed to impinge against a predetermined position of a core shroud 13 in reactor water 11 filled in the reactor pressure vessel 9 and being at temperature higher than the low temperature water. Then, while continuing to eject the cold water jet 8 from the nozzle 14, the nozzle 14 is moved away from the predetermined position, or the ejection of the cold water jet 8 from the nozzle 14 is stopped, allowing the predetermined position to be heated again with the temperature of the reactor water 11. A thermal shock is thereby applied to the predetermined position for improvement in residual stress of the core shroud 13.

摘要翻译： 安装在反应堆压力容器9外部的低温水箱12中的低温水被高压泵15泵送并通过导体17在压力下供给。 供给的水作为冷水喷射流8从连接到导体17的喷嘴14喷射，并通过驱动机构引入反应堆压力容器9。 从喷嘴14排出的冷水喷射流8被引向冲击填充在反应堆压力容器9中的反应器水11中的核心护罩13的预定位置，并且温度高于低温水。 然后，在从喷嘴14继续喷出冷水射流8的同时，使喷嘴14远离预定位置移动，或者停止从喷嘴14排出冷水喷射8，使预定位置被加热 再次用反应器水11的温度。因此，热冲击被施加到预定位置，以改善芯护罩13的残余应力。