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1. 发明专利

JPH10113841A CHIP DISPOSAL DEVICE 失效
公开(公告)号：JPH10113841A
公开(公告)日：1998-05-06
申请号：JP26882996
申请日：1996-10-09
申请人： MITSUBISHI NUCLEAR FUEL
发明人： TOMINAGA YOSHIAKI , OUCHI MASAKI
IPC分类号： B23Q11/00
摘要： PROBLEM TO BE SOLVED: To reduce occupying space and labor for throwaway by dividing into tiny chips for reducing its volume. SOLUTION: An external peripheral wall is provided around a cutting blade 5 in which a plurality of holes are made, and a mixing blade 10 is rotated above the cutting blade 5 by a motor 8. A cutting claw 12 is mounted in the lower side of the mixing blade 8. A part of a chip which dropped in a hole of the cutting blade 5 is divided into tiny chips by the cutting blade 5 and cutting claw 12, being discharged from the hole. The external peripheral wall 6 is provided with an opening from which the chips left on the cutting blade is discharged.

2. 发明专利

JPH0784089A JUG FOR INSERTING NON-NUCLEAR FUEL CORE STRUCTURE BODY AND INSERTING DEVICE HAVING THE JUG FOR INSERTING NON-NUCLEAR FUEL CORE STRUCTURE BODY 失效
公开(公告)号：JPH0784089A
公开(公告)日：1995-03-31
申请号：JP23391093
申请日：1993-09-20
申请人： MITSUBISHI NUCLEAR FUEL , MITSUBISHI HEAVY IND LTD
发明人： OUCHI MASAKI , MURAOKA SHOICHI
IPC分类号： G21C19/19 , G21C17/06 , G21C21/00
摘要： PURPOSE:To provide a jig for inserting non-nuclear fuel core structure body capable of smoothly and reliably inserting such non-nuclear fuel core structure bodies as control rod cluster, burnable poison assembly and the like in a nuclear fuel assembly and an inserting device provided with the jig for inserting non-nuclear fuel core structure body. CONSTITUTION:A control rod 103 is lowered in the state that a frame 21 of a guide jig 20 is placed at the upper part of a nuclear fuel assembly 6 and the lower part of the control rod 103 is coupled to an guide groove 301 of a guide part 30 to regulate the lower position of the control rod 103 so as to insert it in the space formed in a guide groove 220 in the guide part 22 of the guide jig 20. At the same time, by placing the guide part 30 at the upper part of the frame 21, the control rod 103 is positioned in the nuclear fuel assembly 6 to smoothly insert the control rod 103 into the nuclear fuel assembly 6.

3. 发明专利

JPH06138286A DEVICE FOR EXTRACTING SUPPORTING GRID KEY 失效
公开(公告)号：JPH06138286A
公开(公告)日：1994-05-20
申请号：JP28474692
申请日：1992-10-22
申请人： MITSUBISHI NUCLEAR FUEL
发明人： OUCHI MASAKI , MIWA NOBUO , INADA HITOSHI
IPC分类号： G21C3/334 , G21C21/00
摘要： PURPOSE:To provide a device for extracting a supporting grid key, which can smoothly and surely extract an inner key from a supporting grid and mechanize and automate the extracting operation for the inner key. CONSTITUTION:While an inner key inserted in the opening of a supporting grid is being sandwiched between a pair of supporting members 15 by bringing close to each other the supporting members 15 provided at the end of a robot arm, the inner key is rotated using a key rotating mechanism 16 by a predetermined angle to disengage the inner key from the supporting grid. Thereafter the inner key is moved along its axis using a key moving mechanism 17 so as to extract the inner key from the supporting grid.

4. 发明专利

JPH03282398A ASSEMBLY METHOD AND ASSEMBLY DEVICE FOR FUEL ASSEMBLY 失效
公开(公告)号：JPH03282398A
公开(公告)日：1991-12-12
申请号：JP8371690
申请日：1990-03-30
申请人： MITSUBISHI NUCLEAR FUEL
发明人： OUCHI MASAKI , KAMEDA MASAHIRO
IPC分类号： G21C21/00
摘要： PURPOSE:To prevent the generation of scratching in the outer peripheral part of fuel rods and to make improvement in assembling efficiency by withdrawing protective tubes covering the fuel rods into a grid space, then pulling the protective tubes from the grid space. CONSTITUTION:The outer peripheral parts of the respective fuel rods 6 are coated with the protective tubes 15. An upper moving base 14a of a fuel rod withdrawing machine 12 is advanced to an assembling base 11 side. A protective tube withdrawing tool 18 is inserted into the assembling base 11 and is engaged with an end plug 16 of the tube 15 set in a fuel rod magazine 10. The moving base 14a is then retreated to withdraw the fuel rod 6 together with the tube 15 into the space on the base 11. An expanded diameter part 18l expands the diameter of the grid space at this time and, therefore, the scratches are not generated in the outer peripheral part of the fuel rod 6. The end lug 6a of the fuel rod 6 is thereafter attracted to an attracting device 32 and the lower moving base 14 is advanced to engage a protective tube puller 19 with the end plug 16 of the tube. Only the tube 15 is pulled to the withdrawing machine 12 by retreating the moving base 14b. The fuel rods 6 are withdrawn into the respective grid spaces on the base 5 and the tubes 15 are stored by repeating such operations.

5. 发明专利

JPH01237498A METHOD OF ASSEMBLING FUEL ASSEMBLY AND ITS SUPPORT LATTICE 失效
公开(公告)号：JPH01237498A
公开(公告)日：1989-09-21
申请号：JP6435488
申请日：1988-03-17
申请人： MITSUBISHI NUCLEAR FUEL
发明人： OUCHI MASAKI
IPC分类号： G21C3/34 , G21C21/00
摘要： PURPOSE:To enable preventing the occurrence of scratches by a method wherein, after the springs on both the front and rear sides of the wall part which forms lattice spaces are warped so as to project at the inside of wall parts and to insert fuel rods, the springs are warped back to be brought into contact with the surface of fuel rods with pressure. CONSTITUTION:Springs 9 supporting a fuel rod 6 are formed like the approximate circular arc of their cross section and loose parts 22 are set at both ends thereof. Further, when the top part of a spring 21 is pushed with pressure from the rear side of a wall part 7 to the front side thereof to move, the spring 21 is warped at the reverse side to project the outside. After in lattice spaces 5 of a support lattice 20, the rods 6 is held by pull-in rods to pull so as not to be brought into contact with dimples 9 and mounted on the dimples 9, the pull-in rods are inserted in the upper spaces to warp the springs 21 and put into contact with the rods 6. Therefore, the production of scratches on the outer circumferential face of the rods can be prevented.

6. 发明专利

JPS63241496A FUEL AGGREGATE ASSEMBLING DEVICE 失效
公开(公告)号：JPS63241496A
公开(公告)日：1988-10-06
申请号：JP7680187
申请日：1987-03-30
申请人： MITSUBISHI NUCLEAR FUEL
发明人： MOCHIDA MASAKICHI , OUCHI MASAKI
IPC分类号： G21C21/00

7. 发明专利

JPS61116690A Assembling device for fuel aggregate 失效
标题翻译：装配燃料集装置
公开(公告)号：JPS61116690A
公开(公告)日：1986-06-04
申请号：JP23718884
申请日：1984-11-10
申请人： Mitsubishi Nuclear Fuel
发明人： OUCHI MASAKI
IPC分类号： G21C21/00

8. 发明专利

JPH09234570A WELDING ELECTRODE 失效
公开(公告)号：JPH09234570A
公开(公告)日：1997-09-09
申请号：JP4348096
申请日：1996-02-29
申请人： MITSUBISHI NUCLEAR FUEL
发明人： OUCHI MASAKI , OZAWA TERUO , MURAKAMI KAZUO , YONEDA HIDESHI , TOMINAGA YOSHIAKI
IPC分类号： G21C21/02 , B23K11/00 , B23K11/30
摘要： PROBLEM TO BE SOLVED: To prevent expulsion by bringing an electrode in contact with a tube more wide/uniform and reducing a fastening load. SOLUTION: A tubular electrode to supply electricity to a covered tube 2 is divided into an upper electrode part 11 and lower electrode part 12, roughly semi-cylindrical recessed parts 11a, 12a are respectively arranged therein. The recessed parts 11a, 12a roughly have an inner diameter of the minimum dimension in the tolerance range of the outer diameter of a covered tube 2, roughly semi circular slits 32 are formed on both sides thereof. Each elastic part 33 formed between the recessed parts 11a, 12a and each slit 32 absorbs the clearance due to a variance of the outer diameter of covered tube 2.

9. 发明专利

JPH05196787A ASSEMBLING DEVICE FOR FUEL ASSEMBLY 失效
公开(公告)号：JPH05196787A
公开(公告)日：1993-08-06
申请号：JP23059192
申请日：1992-08-28
申请人： MITSUBISHI NUCLEAR FUEL
发明人： KATO AKIHIRO , YOSHIDA MASAFUMI , OUCHI MASAKI
IPC分类号： G21C3/334 , G21C21/00
摘要： PURPOSE:To obtain an assembling device of a fuel assembly which has a simple mechanical construction and makes it possible to shorten the time required for insertion of fuel rods. CONSTITUTION:A pull-in rod 40 is projected and inserted through a lattice space of a support lattice 4 and fuel rods 6 in a fuel magazine 20 are held by the pull-in rod 40. By returning this pull-in rod 40 to an initial position thereafter, the fuel rods 6 in the number of 1/4 of the whole fuel rods 6 can be inserted simultaneously through the support lattice 4. Then, the pull-in rod 40 is rotated at an angle of 90 deg. coaxially with the axis of the support lattice 4 and projected and returned in the same way as the above, whereby the fuel rods 6 in the number of 1/4 can be inserted simultaneously through the support lattice 4. In the same way, all of the fuel rods 6 can be inserted through the support lattice 4.

10. 发明专利

JPH0228594A FITTING DEVICE FOR LOWER NOZZLE 失效
公开(公告)号：JPH0228594A
公开(公告)日：1990-01-30
申请号：JP14525688
申请日：1988-06-13
申请人： MITSUBISHI NUCLEAR FUEL
发明人： KOIWAI TAICHI , YAMAZAKI SHUJI , OUCHI MASAKI
IPC分类号： G21C21/00 , G21C3/334
摘要： PURPOSE:To make lower nozzle fitting operation unmanned and to reduce the possibility of exposure in the operation by providing a mechanism which clamps a screw in a screw holder. CONSTITUTION:A holding mechanism 47 for conveyance locks and holds one of the screw holder 51 where the screw 59 for lower nozzle fixation is put, a lower nozzle N, and a guide plate 7 selectively. Further, a carrying mechanism 40 moves the holding mechanism 42 for conveyance between a mount base 52 for the respective members and the lower end position of a control rod guide pipe. Further, a pressing and fixing mechanism 5 presses the guide plate 7 or screw holder 51 which is locked by the holding mechanism 47 for conveyance against the lower end to the control rod guide tube and fixes it. Then a screw clamping-in mechanism (automatic screw clamper 67) presses the screw 59 in the screw holder to the lower end of the control guide tube through a lower nozzle fixing mechanism which can press the lower nozzle N against the lower end of the control rod guide tube and fixes it and the lower nozzle N fixed by the lower nozzle fixing mechanism.

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