公开(公告)号：US5897062A

公开(公告)日：1999-04-27

申请号：US733926

申请日：1996-10-18

申请人： Kunio Enomoto ,  Katsuhiko Hirano ,  Masahiro Otaka ,  Kazuo Amano ,  Eisaku Hayashi ,  Sadato Shimizu ,  Ren Morinaka ,  Kazunori Sato

发明人： Kunio Enomoto ,  Katsuhiko Hirano ,  Masahiro Otaka ,  Kazuo Amano ,  Eisaku Hayashi ,  Sadato Shimizu ,  Ren Morinaka ,  Kazunori Sato

IPC分类号： B23K31/00 ,  B05B1/00 ,  E21B7/18

CPC分类号： B05B1/02 ,  B05B1/34 ,  B05B1/08 ,  G21C17/0225

摘要： A fluid jet nozzle has a water chamber accommodating therein pressurized fluid, an orifice communicating with the water chamber and contracting the fluid from the water chamber, a throat communicating with the orifice and through which the fluid from the orifice passes, a multiplication chamber communicating with the throat and receiving the fluid from the throat for multiplying cavitation, and a diffusion chamber receiving the fluid from the multiplication chamber for diffusing the fluid.

摘要翻译： 流体喷嘴具有容纳加压流体的水室，与水室连通并且从水室收缩流体的孔口，与孔口连通的喉部，来自孔口的流体通过该喉管，与 喉部并且接收来自喉部的流体以使气蚀倍增，以及扩散室，其接收来自乘法室的流体，用于扩散流体。

公开(公告)号：US06341151B1

公开(公告)日：2002-01-22

申请号：US09649988

申请日：2000-08-29

申请人： Kunio Enomoto ,  Katsuhiko Hirano ,  Eisaku Hayashi ,  Ren Morinaka ,  Sadato Shimizu ,  Satoshi Kanno ,  Shigeru Tanaka ,  Tetsuya Ishikawa

发明人： Kunio Enomoto ,  Katsuhiko Hirano ,  Eisaku Hayashi ,  Ren Morinaka ,  Sadato Shimizu ,  Satoshi Kanno ,  Shigeru Tanaka ,  Tetsuya Ishikawa

IPC分类号： G21C1700

CPC分类号： C21D7/06 ,  G21C19/00 ,  G21C19/207 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2002/401 ,  G21Y2004/20 ,  G21Y2004/30 ,  G21Y2004/40 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.

摘要翻译： 根据本发明的用于反应堆压力容器中的结构构件的预防性维护方法和装置通过将来自喷嘴的水射流冲击到偏转器的平面上来降低结构构件的表面上的拉伸残余应力，从而改变 水射流的流动方向，以及在偏转到结构构件表面之后撞击水射流。 该方法和装置可应用于狭窄的空间部分，并且可以改善结构构件表面上的残余应力，并且还可以防止诸如应力腐蚀开裂的损伤。

公开(公告)号：US06639962B2

公开(公告)日：2003-10-28

申请号：US10045087

申请日：2002-01-15

申请人： Kunio Enomoto ,  Katsuhiko Hirano ,  Eisaku Hayashi ,  Ren Morinaka ,  Sadato Shimizu ,  Satoshi Kanno ,  Shigeru Tanaka ,  Tetsuya Ishikawa

发明人： Kunio Enomoto ,  Katsuhiko Hirano ,  Eisaku Hayashi ,  Ren Morinaka ,  Sadato Shimizu ,  Satoshi Kanno ,  Shigeru Tanaka ,  Tetsuya Ishikawa

IPC分类号： G21C1900

CPC分类号： G21C19/00 ,  C21D7/06 ,  G21C19/207 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2002/401 ,  G21Y2004/20 ,  G21Y2004/30 ,  G21Y2004/40 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.

公开(公告)号：US06345083B1

公开(公告)日：2002-02-05

申请号：US09373213

申请日：1999-08-12

申请人： Kunio Enomoto ,  Katsuhiko Hirano ,  Eisaku Hayashi ,  Ren Morinaka ,  Sadato Shimizu ,  Satoshi Kanno ,  Shigeru Tanaka ,  Tetsuya Ishikawa

发明人： Kunio Enomoto ,  Katsuhiko Hirano ,  Eisaku Hayashi ,  Ren Morinaka ,  Sadato Shimizu ,  Satoshi Kanno ,  Shigeru Tanaka ,  Tetsuya Ishikawa

IPC分类号： G21C1900

CPC分类号： C21D7/06 ,  G21C19/00 ,  G21C19/207 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2002/401 ,  G21Y2004/20 ,  G21Y2004/30 ,  G21Y2004/40 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural member by impinging a water jet from a nozzle onto a plane surface of a deflector to thereby change direction of flow of the water jet, and impinging the water jet after being deflected onto the surface of the structural member. This method and apparatus are applicable to a narrow space portion, and can improve a residual stress on the surface of the structural member and can also prevent damage such as stress corrosion cracking.

公开(公告)号：US06519991B2

公开(公告)日：2003-02-18

申请号：US10128252

申请日：2002-04-24

申请人： Katsuhiko Hirano ,  Kunio Enomoto ,  Eisaku Hayashi ,  Sadato Shimizu ,  Ren Morinaka ,  Tetsuya Ishikawa ,  Shigeru Tanaka ,  Noboru Chiba

发明人： Katsuhiko Hirano ,  Kunio Enomoto ,  Eisaku Hayashi ,  Sadato Shimizu ,  Ren Morinaka ,  Tetsuya Ishikawa ,  Shigeru Tanaka ,  Noboru Chiba

IPC分类号： B24C100

CPC分类号： B24C1/10 ,  B24C3/04 ,  G21C19/00 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2002/401 ,  G21Y2004/302 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.

公开(公告)号：US06425276B1

公开(公告)日：2002-07-30

申请号：US09489026

申请日：2000-01-21

申请人： Katsuhiko Hirano ,  Kunio Enomoto ,  Eisaku Hayashi ,  Sadato Shimizu ,  Ren Morinaka ,  Tetsuya Ishikawa ,  Shigeru Tanaka ,  Noboru Chiba

发明人： Katsuhiko Hirano ,  Kunio Enomoto ,  Eisaku Hayashi ,  Sadato Shimizu ,  Ren Morinaka ,  Tetsuya Ishikawa ,  Shigeru Tanaka ,  Noboru Chiba

IPC分类号： B24C100

CPC分类号： B24C1/10 ,  B24C3/04 ,  G21C19/00 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2002/401 ,  G21Y2004/302 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a low angle of incidence is provided. The apparatus is comprised of a nozzle which introduces a high pressure water and injects a water jet stream containing air bubbles caused by cavitation at the cylindrical structure disposed in water, wherein the angle of injection of the jet stream is smaller than 45 degrees relative to a tangent of the cylindrical structure.

摘要翻译： 提供了一种喷水喷丸处理装置，其能够通过以低入射角注入含有由气蚀引起的气泡的喷射流，对大径圆柱形结构进行高效喷丸处理。 该装置包括一个喷嘴，该喷嘴引入高压水，并且在设置在水中的圆柱形结构处注入含有由空化引起的气泡的水射流，其中喷射流的喷射角度相对于 圆柱形结构的切线。

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。

公开(公告)号：US06240155B1

公开(公告)日：2001-05-29

申请号：US09366720

申请日：1999-08-04

申请人： Koichi Kurosawa ,  Eisaku Hayashi ,  Sadato Shimizu ,  Minoru Ootaka ,  Fujio Yoshikubo ,  Ren Morinaka ,  Masayuki Nishino ,  Noboru Chiba ,  Kunio Enomoto ,  Kazunori Sato

发明人： Koichi Kurosawa ,  Eisaku Hayashi ,  Sadato Shimizu ,  Minoru Ootaka ,  Fujio Yoshikubo ,  Ren Morinaka ,  Masayuki Nishino ,  Noboru Chiba ,  Kunio Enomoto ,  Kazunori Sato

IPC分类号： G21C1700

CPC分类号： G21C19/00 ,  G21C19/207 ,  G21Y2002/203 ,  G21Y2002/40 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A method of performing maintenance on a structural member inside a reactor pressure vessel includes lowering an annular guide rail having a second lug until the guide rail rests on an upper flange of a core shroud provided inside the reactor pressure vessel, detachably mounting the second lug of the guide rail to a first lug mounted on the core shroud, positioning a discharging nozzle at a position at which compressive remaining stress is added to a surface of the core shroud by moving the discharging nozzle in a radial direction and an axial direction of the core shroud by a discharging nozzle moving apparatus mounted on a turnable revolving on the guide rail and discharging water to add compressive remaining stress to a surface of the core shroud from the discharging nozzle.

摘要翻译： 对反应堆压力容器内部的结构构件进行维护的方法包括降低具有第二凸耳的环形导轨，直到导轨靠在设置在反应堆压力容器内部的芯护罩的上凸缘上，可拆卸地安装第二凸耳 所述导轨连接到安装在所述芯护罩上的第一凸耳，通过沿所述芯的径向和轴向方向移动所述排出喷嘴，将排出喷嘴定位在所述芯护罩的表面处的压缩剩余应力的位置处 通过安装在导轨上可转动的排放喷嘴移动装置进行护罩，并排出水以从排出喷嘴向芯护罩的表面增加压缩剩余应力。

公开(公告)号：US6058153A

公开(公告)日：2000-05-02

申请号：US26726

申请日：1998-02-20

申请人： Koichi Kurosawa ,  Eisaku Hayashi ,  Sadato Shimizu ,  Minoru Ootaka ,  Fujio Yoshikubo ,  Ren Morinaka ,  Masayuki Nishino ,  Noboru Chiba ,  Kunio Enomoto ,  Kazunori Sato

发明人： Koichi Kurosawa ,  Eisaku Hayashi ,  Sadato Shimizu ,  Minoru Ootaka ,  Fujio Yoshikubo ,  Ren Morinaka ,  Masayuki Nishino ,  Noboru Chiba ,  Kunio Enomoto ,  Kazunori Sato

IPC分类号： G21C19/00 ,  G21C17/00 ,  G21C17/003

CPC分类号： G21C19/00 ,  G21C19/207 ,  G21Y2002/203 ,  G21Y2002/40 ,  G21Y2004/501 ,  G21Y2004/504

摘要： A preventive maintenance apparatus for structural members inside a nuclear reactor pressure vessel includes a ring-shaped guide rail having a plurality of lugs which is placed on an upper flange of a core shroud provided inside a reactor pressure vessel. At least some of lugs separately engage with a plurality of guide rods provided on an inner surface of the reactor pressure vessel. A turntable is rotated on the guide rail. A first discharging nozzle moving apparatus placed on the turntable moves a first discharging nozzle for adding compressive remaining stress to an outer surface of the core shroud in a radial direction of the core shroud and in an axial direction of the core shroud. A second discharging nozzle moving apparatus placed on the turntable moves a second discharging nozzle for adding compressive remaining stress to an inner surface of the core shroud in a radial direction of the core shroud and in an axial direction of the core shroud.

摘要翻译： 核反应堆压力容器内的结构构件的预防性维护装置包括具有多个凸耳的环形导轨，所述多个凸耳被放置在设置在反应堆压力容器内的芯护罩的上凸缘上。 至少一些凸耳与设置在反应堆压力容器的内表面上的多个导杆分开接合。 转盘在导轨上旋转。 放置在转台上的第一排放喷嘴移动装置移动第一排放喷嘴，用于在核心护罩的径向方向和芯套管的轴向方向上向芯护罩的外表面增加压缩剩余应力。 放置在转盘上的第二排放喷嘴移动装置移动第二排放喷嘴，用于在芯护罩的径向方向和芯套管的轴向方向上向芯护罩的内表面增加压缩剩余应力。

公开(公告)号：US5749384A

公开(公告)日：1998-05-12

申请号：US409689

申请日：1995-03-24

申请人： Eisaku Hayashi ,  Koichi Kurosawa ,  Fujio Yoshikubo ,  Hideyasu Furukawa ,  Ren Morinaka ,  Kunio Enomoto ,  Masahiro Otaka ,  Noboru Chiba ,  Kazunori Sato

发明人： Eisaku Hayashi ,  Koichi Kurosawa ,  Fujio Yoshikubo ,  Hideyasu Furukawa ,  Ren Morinaka ,  Kunio Enomoto ,  Masahiro Otaka ,  Noboru Chiba ,  Kazunori Sato

IPC分类号： G21D1/00 ,  B08B9/02 ,  B08B9/093 ,  C21D7/06 ,  G21C13/00 ,  G21C13/036 ,  G21C19/02

CPC分类号： B08B9/023 ,  B08B9/093 ,  C21D7/06 ,  G21C13/036 ,  G21Y2002/103 ,  G21Y2004/20 ,  Y02E30/40

摘要： An apparatus preventive maintenance having a driving mechanism capable of driving a jet nozzle 24 to cause it to travel upward-and-downward, to rotate and to swing is settled on the top of a housing in the bottom portion of a reactor pressure vessel and on a hole for a fuel support piece, water pumped by a high pressure pump is spouted from a jet nozzle, and cavitation bubbles generated during the spouting are supplied to the positions to be treated for preventive maintenance, such as housings in the bottom portion of the reactor pressure vessel. Therewith, the residual tensile stress in the position to be treated is improved in a releasing direction by the energy generated by the collapsing of the cavitation bubbles.

摘要翻译： 具有能够驱动喷嘴24以使其上下移动以旋转和摆动的驱动机构的装置预防性维护在反应堆压力容器的底部的壳体的顶部上沉降，并且在 用于燃料支撑件的孔，由高压泵泵送的水从喷嘴喷出，并且在喷射期间产生的空化气泡被供给到预防性维护的待处理位置，例如在底部的壳体 反应堆压力容器。 因此，通过由空化气泡塌缩产生的能量，在待处理位置的残余拉伸应力在释放方向上得到改善。