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1. 发明专利

JPH09159796A BASKET FOR SPENT FUEL CONTAINER AND METHOD FOR MANUFACTURING IT 失效
公开(公告)号：JPH09159796A
公开(公告)日：1997-06-20
申请号：JP31617895
申请日：1995-12-05
申请人： HITACHI SHIPBUILDING ENG CO
发明人： MIKATA MASAKI , IWASA KAZUO
IPC分类号： G21F5/008 , G21F5/00 , G21F5/012
摘要： PROBLEM TO BE SOLVED: To make it possible to assemble a basket easily in a short time and manufacture it at low costs by fixing assemblies of square-tube materials with support members. SOLUTION: A basket consists of square-tube assemblies 14 made by stacking square-tube materials 12 for forming storing chambers 16A into which spent fuel rod assemblies can be inserted so that the faces of the materials can fit each other, support members 15A to 15C to fix the square-tube materials 12 by covering the outer circumferences of the square-tube assemblies 14, upper plates which are installed on the upper faces of the support members 15A to 15C and where each of the inserting holes is so formed as to communicate with the square-tube materials 12 and a bottom plate installed on the lower face of the support members 15A to 15C. Therefore, the basket can be easily assembled in a short time by fixing with the support members 15A to 15C the assemblies 14 of the square-tube materials whose inner spaces are used as storing chambers, and the highly precise molding of the square tubes is all required to enables the highly precise and low-cost manufacture of the basket.

2. 发明专利

JPH10206591A SPENT FUEL STORAGE VESSEL 失效
公开(公告)号：JPH10206591A
公开(公告)日：1998-08-07
申请号：JP1178097
申请日：1997-01-27
申请人： HITACHI SHIPBUILDING ENG CO
发明人： MIKATA MASAKI , IWASA KAZUO
IPC分类号： G21F5/008 , G21F9/36
摘要： PROBLEM TO BE SOLVED: To avoid welding of bottom plate and bottom flange of a spent fuel storage vessel. SOLUTION: A vessel is constituted of a vessel body 2 having an inner cylinder 3 and a middle cylinder 4 and a bottom plate 14 closing the lower end of the vessel body 2, a shield member storage space 7 is formed between the inner cylinder 3 and the middle cylinder 4. The bottom plate 14 is constituted of a bottom plate main body 14a welded to the lower end of the inner cylinder 3 and a flange 14b formed in one at the periphery of the bottom plate main body 14a and closing the lower end of the shield member storage space 7. The outer surface of the flange part 14b is welded to the lower end of the middle cylinder 4 and an opening connecting to the inside of the shield member storage space 7 is formed on the flange 14b from outside. After casting lead shield member 6 from the opening in the shield member storage space 7, a closing plug 20 is welded on the flange 14b to close the opening.

3. 发明专利

JP2000061638A CAP WELDING METHOD, TIG WELDING EQUIPMENT AND METHOD OF ATTACHING CASK BASKET STORING CYLINDER USING THIS CAP WELDING METHOD 失效
公开(公告)号：JP2000061638A
公开(公告)日：2000-02-29
申请号：JP23217998
申请日：1998-08-19
申请人： HITACHI SHIPBUILDING ENG CO
发明人： KITAGAWA SHOICHI , TAKEDA SHINNOSUKE , ONOSE KENJI , MIKATA MASAKI
IPC分类号： G21C19/32 , B23K9/00 , B23K9/02 , B23K9/12 , B23K9/167
摘要： PROBLEM TO BE SOLVED: To obtain a sufficient strength without the need of machining a lower hole, to dispense with the supply of a filler material, and to reduce welding cost. SOLUTION: A storing cylinder 5 is arranged on a beam member 4; a welding current is supplied to a tungsten electrode 13a, which is arranged with a prescribed space apart at a welding position, beam member 4, and the storing cylinder 5 while shielding gases are simultaneously supplied around the welding position; a penetration m is formed, without adding a filler material, from the surface of the lower plate of the storing cylinder 5 to the beam member 4; and the penetration area is increased by turnably moving the electrode 13a in the circumferential direction or the spiral direction.

4. 发明专利

JPH09171094A STORAGE CONTAINER FOR SPENT FUEL 失效
公开(公告)号：JPH09171094A
公开(公告)日：1997-06-30
申请号：JP33124995
申请日：1995-12-20
申请人： HITACHI SHIPBUILDING ENG CO
发明人： MIKATA MASAKI , IWASA KAZUO
IPC分类号： G21C19/06 , G21F5/00 , G21F5/008
摘要： PROBLEM TO BE SOLVED: To obtain a storage container in which a good weld is formed by improving the mounting part of an internal heat-conducting fin. SOLUTION: In a storage container for a spent fuel, an inner tube, a γ-ray shielding body 9, an intermediate tube 7, internal heat-conducting fins 10 and an outer tube 8 are externally fitted sequentially to a body 1, and a neutron shielding material 11 is filled between the internal heat-conducting fins 10 between the intermediate tube 7 and the outer tube 8. In the storage container, the intermediate tube 7 and the outer tube 8 are formed of a copper-stainless steel clad steel plate in which a copper plate is bonded to a stainless steel plate, the side of a copper part 7a and that of a copper part 8a are arranged so as to be faced with each other, and the internal heat-conducting fins 10 which are made of copper are bonded by welds 12A, 12B in such a way that they are welded to the copper parts 7a, 8a at the intermediate tube 7 and the outer tube 8.

5. 发明专利

JPH08257746A WELDING EQUIPMENT AND WELDING METHOD 失效
公开(公告)号：JPH08257746A
公开(公告)日：1996-10-08
申请号：JP6535295
申请日：1995-03-24
申请人： HITACHI SHIPBUILDING ENG CO
发明人： OTSUKA TAKAO , OSAWA MORIHIKO , NAKAJIMA HIROYUKI , MIKATA MASAKI , AMIHOSHI TAKESHI , FUJIWARA KATSUJI
IPC分类号： G21F5/008 , B23K9/00 , B23K9/127 , B23K37/02 , G21F5/00
摘要： PURPOSE: To precisely set a targeting position of a welding torch along weld line by guiding a welding torch along weld line while a guide roller supports a welding torch and is abutted/rolled on an object to be welded. CONSTITUTION: An object to be welded consisting of first/second cylinders 2, 3 and a heat transfer fin 10 is supported turnable by a turning roller 16. A mounting table 20, which is laid with a guide rail 22 parallel to weld line neighboring with the roller 16, is arranged. A running truck 23 is arranged on the guide rail free to run. A boom 26 of prescribed length is mounted at the side of object to be welded of running truck 23. The boom 26 is guided along the guide rail 22 by a guide roller 27. A welding torch 33 is arranged at the tip part of boom 26. Guide rollers 38, 39 arranged at the side of boom 26 supports the torch 33 and is abutted/rolled on objects 2, 3, 6, to be welded so as to guide the welding torch 33 along weld line. By this method, the weld line having deep depth at narrow part is easily welded.

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