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1. 发明专利

JPH10314961A DIFFERENT KIND MATERIAL JOINT TRANSITION PIECE, AND ITS MANUFACTURE 失效
公开(公告)号：JPH10314961A
公开(公告)日：1998-12-02
申请号：JP12246097
申请日：1997-05-13
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YAMASHITA YOSHIHIRO , YOSHIDA SUMI , FUJITA KAZUHIRO
IPC分类号： B23K20/00 , B23K20/12 , B23K103/18 , C21D9/50
摘要： PROBLEM TO BE SOLVED: To provide a novel transition piece of a different kind material joint which is relatively inexpensive, capable of providing a clean and stable joined surface, and replaceable as a repair technology, and its manufacturing method. SOLUTION: A different kind material joint transition piece is provided with a first joined part which is annealed for stress relief after being joined by the friction welding method between a first material of chromium(Cr) steel 1 and a second material nickel (Ni) alloy 2 as the material of the joint, and provided with a second joined part which is joined by the friction welding method between the nickel(Ni) alloy 2 side of the joint and the other material of austenitic (γ) stainless steel 3.

2. 发明专利

JPS6428597A FAST BREEDER REACTOR REFUELING MACHINE 失效
公开(公告)号：JPS6428597A
公开(公告)日：1989-01-31
申请号：JP18217987
申请日：1987-07-23
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , MINE MASAO , IKEUCHI TOSHIAKI
IPC分类号： G21C19/19
摘要： PURPOSE:To intend simplification of reactor structure through enabling omission of a smaller rotating plug, by moving a traveling cart equipped with a telescopic tube with a gripper, along a mono-rail prepared for horizontal move of a refueling machine, which installed to a rotating plug which can freely rotate on a roof deck of a reactor. CONSTITUTION:A refueling machine 1 can be transferred to a required fuel position by rotating a simply rotating plug which can freely rotate on a roof deck of a rector and by transferring a traveling cart 5 along a mono-rail prepared for horizontal move of the refueling machine 1 which is fixed to the plug 2, driven by a driving motor 8 and a ball screw 7 and etc. At this position, a telescopic tube 12 equipped to the cart 5 and having a gripper 13 on its end, changes its length by operation of an electric driven worm 10 and a fuel is exchanged. By this constitution, the smaller rotating plug can be omitted thereby the nuclear reactor structure is much simplified.

3. 发明专利

JPS60133142A METAL FITTINFG FOR SUPPORTING HEAT INSULATING MATERIAL 失效
公开(公告)号：JPS60133142A
公开(公告)日：1985-07-16
申请号：JP24057783
申请日：1983-12-20
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , ITOU TADASHI
IPC分类号： B65D90/06 , E04B1/76 , G21C13/00

4. 发明专利

JPS60129353A LINING CONSTRUCTION METHOD 失效
公开(公告)号：JPS60129353A
公开(公告)日：1985-07-10
申请号：JP23630183
申请日：1983-12-16
申请人： HITACHI LTD
发明人： MASUDA JIYUNICHI , YAMASHITA YOSHIHIRO , ITOU TADASHI
IPC分类号： E04F13/08 , B65D90/04 , G21D1/00 , G21D1/02

5. 发明专利

JPS5871489A PRESSURE SUPPRESSION CHAMBER FOR REACTOR CONTAINER 失效
公开(公告)号：JPS5871489A
公开(公告)日：1983-04-28
申请号：JP17005481
申请日：1981-10-26
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , OYAMADA OSAMU , FURUKAWA HIDEYASU , UOZUMI HIROTO
IPC分类号： G21C9/004 , G21C9/00

6. 发明专利

JP2004101189A Apparatus and method for inspecting defect 有权
公开(公告)号：JP2004101189A
公开(公告)日：2004-04-02
申请号：JP2002259094
申请日：2002-09-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： BABA JUNJI , MATSUI TETSUYA , YAMASHITA YOSHIHIRO , NAKAMURA MOTOYUKI
IPC分类号： G01B11/30 , G01N21/88 , G01N29/00
摘要： PROBLEM TO BE SOLVED: To detect a surface defect by collectively measuring a surface to be inspected of a wide area without contact and to size the length and depth of the surface defect through the use of a flaw detecting image.
SOLUTION: A speckle patterning laser oscillator 6 is made to oscillate pulse laser light, so that reflected light 12 from the object to be inspected 1 is made to interfere over a CCD element with reference light branched by a beam splitter 10 for branching the reference light to photograph a first speckle pattern. Pulse laser light is oscillated by a pulse laser 5 for exciting elastic waves and condensed by a lens 7 to excite elastic waves from an elastic wave exciting part 4 and to photograph a second speckle pattern similarly to the first speckle pattern. Image processing is performed on the images of the two patterns by an image processing device 15 to determine a flaw detecting image. The length of the defect is measured based on the flaw detecting image. The difference between a surface deviation of a surface defect part and a surface deviation of a sound part is computed based on the flaw detecting image. By making reference to a database from the difference and the length of the defect, the depth of the defect is sized.
COPYRIGHT: (C)2004,JPO

7. 发明专利

JP2001138070A REPAIR METHOD BY FRICTION OVERLAYING 失效
公开(公告)号：JP2001138070A
公开(公告)日：2001-05-22
申请号：JP32376099
申请日：1999-11-15
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , KOSHIISHI MASATO , KATO TAKAHIKO
IPC分类号： B23K31/00 , B23K20/12 , B23K20/227
摘要： PROBLEM TO BE SOLVED: To repair a damaged part on the surface of an object to be repaired by a heat input maintaining the temperature of the object to its melting point or below. SOLUTION: A cut groove 34 is formed on the surface of a base material 32 by cutting the damaged part on the surface of the base material 32, a friction rod 18 is pressed into the cut groove 34 while rotating the friction rod 18, and part of the friction rod 18 is formed successively as a friction overlaying part 36 in the cut groove 34 by friction between the friction rod 18 and the cut groove 34.

8. 发明专利

JPH11311694A REPLACEMENT METHOD FOR NUCLEAR REACTOR INSIDE STRUCTURE 失效
公开(公告)号：JPH11311694A
公开(公告)日：1999-11-09
申请号：JP11817098
申请日：1998-04-28
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , KATO TAKAHIKO , HATTORI SHIGEO , KOSHIISHI MASATO
IPC分类号： G21C19/02
摘要： PROBLEM TO BE SOLVED: To enable the replacement of a jet pump in a nuclear reactor having extended operation result with high reliability, by jointing the clad material of a reactor pressure vessel inside and the support structure of a new jet pump by friction welding. SOLUTION: The inside structure of a nuclear reactor 3, including a shroud 15 and a jet pump, is removed in a state where reactor water is held in a reactor pressure vessel 18, a shield body 38 is provided in a range including the reactor core area of the reactor pressure vessel 18, the reactor water of the reactor pressure vessel 18 is extracted, and thereafter in the case of the replacement of the reactor inside structure performing the attaching of the new inside structure and the removal of the shield body 38, the clad material of the inside of the reactor pressure vessel 18 and the support structure of the new jet pump are jointed with friction welding, when the new jet pump is attached. As a result, the clad material which lowered in mechanical strength through aging caused by extended operation and the support material of the jet pump can be jointed surely by a small heat input amount with the use of friction welding.

9. 发明专利

JPH06331778A COOLING STRUCTURE FOR WALL OF FAST BREEDER REACTOR 失效
公开(公告)号：JPH06331778A
公开(公告)日：1994-12-02
申请号：JP12236893
申请日：1993-05-25
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , IKEUCHI TOSHIAKI , SEKINE KATSUHISA
IPC分类号： G21C15/02 , G21C15/12
摘要： PURPOSE:To keep high strength while avoiding a severe thermal stress condition and to prevent an oval shaking of a cylindrical shell by providing a top flange at the upper end part of the cylindrical shell while bending toward the wall of reactor. CONSTITUTION:In order to relax thermal stress in the reactor wall 1, low temperature sodium 3 is fed from below between the reactor wall 1 and a cylindrical shell 2 and flows over the upper end part of the cylindrical shell 2. A top flange 3 is provided at the upper end part of the cylindrical shell 2 while being bent toward the reactor wall 1 thus enhancing the rigidity of the cylindrical shell 2. The joint between the cylindrical shell 2 and the top flange 3 is arched so that the streamline of low temperature sodium 3 is not exfoliated. The thickness of the cylindrical shell 2 is set at 18mm whereas the thickness of the top flange 3 is set at 50mm. The cylindrical shell 2 is provided with high rigidity structure having natural frequency higher than the frequency of fluid coupled oscillation caused by oval oscillation.

10. 发明专利

JP2001343481A CRACK DIAGNOSTIC METHOD FOR REACTOR CORE INTERNAL STRUCTURE 失效
公开(公告)号：JP2001343481A
公开(公告)日：2001-12-14
申请号：JP2001097951
申请日：2001-03-30
申请人： HITACHI LTD
发明人： YAMASHITA YOSHIHIRO , FUSE MOTOMASA , MATSUI TETSUYA , SAKAI TAKAO
IPC分类号： G01B11/30 , G01B17/00 , G01M7/02 , G01N21/91 , G01N21/95 , G01N29/00 , G01N29/12 , G21C17/003
摘要： PROBLEM TO BE SOLVED: To provide a crack diagnostic method for reactor core internal structure, capable of totally diagnosing cracks on the core internal surface remotely and in non-contact manner and reducing the exposure dose of workers and drastically reducing work man-hours. SOLUTION: A surface wave is generated on the surface of reactor core internal structure, a laser light is cast on the surface and based on the speckle pattern of laser holography that reflection light from the surface forms, cracks existing on the surface of the core internals are surveyed.

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