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1. 发明专利

SE9602963L 未知
公开(公告)号：SE9602963L
公开(公告)日：1997-02-23
申请号：SE9602963
申请日：1996-08-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUROSAKI HIDEKI , ITO KENICHI , SASAKI MASANA , TOKUNAGA KENSUKE
IPC分类号： G21C3/28 , G21C21/02 , G21C3/60

2. 发明专利

SE9602963D0 未知
公开(公告)号：SE9602963D0
公开(公告)日：1996-08-13
申请号：SE9602963
申请日：1996-08-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUROSAKI HIDEKI , ITO KENICHI , SASAKI MASANA , TOKUNAGA KENSUKE
IPC分类号： G21C3/28 , G21C21/02 , G21C

3. 发明专利

JPS59229475A FUEL CHANNEL BOX 失效
公开(公告)号：JPS59229475A
公开(公告)日：1984-12-22
申请号：JP10264983
申请日：1983-06-10
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： AIZAWA YASUHIRO , SASAKI MASANA , HIRAKAWA HIROMASA
IPC分类号： G21C3/324 , C22C16/00 , C22F1/18 , G21C3/30
摘要： PURPOSE:To reduce the bending deformation of a fuel channel box made of a Zr alloy plate under irradiated fast neutrons by specifying the f-value of the plate in the longitudinal direction calculated from the X-ray diffraction intensity of a crystal face of the Zr alloy. CONSTITUTION:A fuel channel box forming a fuel assembly for a boiling water reactor is made of a Zr alloy plate having 0.15-0.5, preferably 0.15-0.40 f-value in the longitudinal direction calculated from the X-ray diffraction intensity of the (0002) crystal face. The elongation of the Zr alloy due to growth under irradiated fast neutrons in the operation of the nuclear reactor is effectively inhibited.

4. 发明专利

JP2000230995A VISUAL INSPECTION DEVICE WITH UNDERWATER ILLUMINATOR 失效
公开(公告)号：JP2000230995A
公开(公告)日：2000-08-22
申请号：JP3401699
申请日：1999-02-12
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI ENG SERVICE , HITACHI ELECTRONICS
发明人： OKUDA SHINICHI , MACHIDA KOICHI , SASAKI MASANA , NAGAMATSU SHIGEO , KUGIMARU KOUICHI , KOMINE ISAO
IPC分类号： G21C17/06 , G21C17/08
摘要： PROBLEM TO BE SOLVED: To make formable optimum environment for visual inspection of an inspecting object underwater by suppressing a halation without using much time and labor in adjusting brightness, illumination position and direction. SOLUTION: The visual inspection device with an underwater illuminator has an underwater TV camera imaging an underwater inspecting object, an underwater floodlight hung down underwater and illuminating the inspection object underwater, an image display indicating an image of the inspecting object pictured with an underwater TV camera. For the visual inspection device with an underwater illuminator, the underwater illuminator 5 is provided with a lamp 10 long in the vertical and a reflection plate 11 where a reflection plane with parabolic surface having the focus in the center axis of the lamp 10.

5. 发明专利

JP2001141876A FUEL INSPECTION DEVICE 失效
公开(公告)号：JP2001141876A
公开(公告)日：2001-05-25
申请号：JP32210299
申请日：1999-11-12
申请人： HITACHI LTD , HITACHI ENG CO LTD , IBARAKI HITACHI JOHO SERVICE K
发明人： MACHIDA KOICHI , IIDA KOJI , MANIWA KAZUHIKO , IMAI MASABUMI , OKUDA SHINICHI , YASUDA TAKAYOSHI , SASAKI MASANA , EITO YOSHINORI
IPC分类号： G01N1/10 , G21C17/07
摘要： PROBLEM TO BE SOLVED: To provide a fuel inspection device that detects broken fuel assemblies and improves efficiency in their detection. SOLUTION: This device has a structure, where more sampling systems are provided in a sampling system than those in a shipper cap. Consequently, the device improves the efficiency of shipping work, because both the decontamination of the sampler and sampling are conducted at the same time, even if the sampling system is contaminated.

6. 发明专利

JPH08114692A FUEL SPACER AND FUEL ASSEMBLY 失效
公开(公告)号：JPH08114692A
公开(公告)日：1996-05-07
申请号：JP19944795
申请日：1995-08-04
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TOKUNAGA KENSUKE , AIZAWA YASUHIRO , NAKAJIMA JUNJIRO , SASAKI MASANA , YASUJIMA MASAKICHI , IMAI MASABUMI
IPC分类号： G21C3/33 , G21C3/344
摘要： PURPOSE: To reduce the coolant pressure loss and improve assembling capability of fuel assembly by constituting so that the axial distances between top ends of the first and the second opening regions and between top ends of the first and the second connecting parts are nearly equal and the axial distances between bottom ends of both opening regions and between bottom ends of both connecting parts are different. CONSTITUTION: As the axial distance L1 between top ends of the first and the second opening regions 13a and 13b of a round cell 6 and the axial distances between top ends of the first and the second connecting parts 30U and 30L are equal, even with an upward movement of a loop shape spring part 9 against the cell 6, the upper end of the part 30U is in contact with the top end of region 13a and so the part 9 is kept in the state where the center axis direction agrees with the coolant flow direction and coolant pressure loss is reduced. As the distance L2 between bottom ends of regions 13a and 13b is smaller than the distance S2 between bottom ends of parts 30U and 30L, the friction force in fuel element 2 insertion through near the part 9 is small and easy to insert and assembling capability is improved.

7. 发明专利

JPS58180983A Fuel channel box 失效
标题翻译：燃油通道箱
公开(公告)号：JPS58180983A
公开(公告)日：1983-10-22
申请号：JP6229582
申请日：1982-04-16
申请人： Hitachi Ltd , Hitachi Eng Co Ltd
发明人： AIZAWA YASUHIRO , KONNO MUTSUO , SASAKI MASANA , HIRAKAWA HIROMASA
IPC分类号： G21C3/30 , G21C3/32 , G21C3/324
CPC分类号： Y02E30/40

8. 发明专利

JPH09119994A FUEL ROD, PRODUCTION THEREOF AND FUEL ROD ASSEMBLY 失效
公开(公告)号：JPH09119994A
公开(公告)日：1997-05-06
申请号：JP16410996
申请日：1996-06-25
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUROSAKI HIDEKI , ITO KENICHI , SASAKI MASANA , TOKUNAGA KENSUKE
IPC分类号： G21C3/17 , G21C3/62 , G21C21/02
摘要： PROBLEM TO BE SOLVED: To reduce the production cost while maintaining the soundness of fuel and to achieve a high degree of burnup by encapsulating a nuclear fuel pellet having a mean grain size within a specified range and helium (He) gas having pressure within a specified range in a fuel rod. SOLUTION: A lower end plug 6 is welded to a fuel cladding tube 3 made of a zirconium alloy which is then filled with a plurality of uranium pellets 4 having a mean grain size of 30-60μm. In a welding chamber, He gas 1 is substituted for the gas, e.g. air, in the fuel cladding tube 3 and pressurized to 1-8atm. In the chamber filled with He gas of that pressure, an upper end plug 5 is welded to the fuel cladding tube made 3 while pressing the uranium pellet 4 by means of a plenum spring 7 thus sealing the inside of fuel rod 2 hermetically. The lower the encapsulation pressure of He at the time of producing fuel rod, the higher the pressure of gaseous fission product and the index of soundness of fuel rod, i.e., the inner pressure of fuel rod at the end of service life, is increased.

9. 发明专利

JPH03150496A FUEL ASSEMBLY 失效
公开(公告)号：JPH03150496A
公开(公告)日：1991-06-26
申请号：JP28890389
申请日：1989-11-08
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SUZUKI SHUJI , AIZAWA YASUHIRO , USUI NAOSHI , SASAKI MASANA
IPC分类号： G21C3/322 , G21C3/30
摘要： PURPOSE:To reduce the quantity of exposure at periodic inspection by installing a reducer between the lower tie plate of the fuel assembly and a lowermost spacer or blocking a cooling material flow passage with the lowermost spacer partially except at the periphery of a fuel rod and thus providing a spacer with a reducer function. CONSTITUTION:A baffle plate 7 is arranged in the space of a round cell 6 for the water rod of the reducer 1, a cell 5 for engagement projection support, and the fuel rod 9 to block the flow of a cooling material. Then the reducer 1 where the flow passage is blocked partially with a cap for the inner periphery, a cap 3 for the outermost periphery, and the baffle plate 7 is arranged between the lower tie plate 16 and spacer 15 to gather the cooling material at the periphery of the fuel rod 9 at the lower part of the fuel assembly, and the flow passage is small in area, so the effect to an increase in the flow velocity of the cooling material is obtained. Consequently, metallic impurities in reactor water is prevented from sticking on the fuel rod 9 or decreasing in sticking quantity.

10. 发明专利

JPS6269194A CORROSION INHIBITING METHOD OF FUEL CHANNEL BOX 失效
公开(公告)号：JPS6269194A
公开(公告)日：1987-03-30
申请号：JP20868985
申请日：1985-09-24
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SASAKI MASANA , NAKAI KEIICHI , HIROSE TSUTOMU , NOMURA TEIJI
IPC分类号： G21C3/324 , G21C3/30

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