专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JP2005049134A Fuel assembly for boiling water reactor 审中-公开
标题翻译：锅炉水反应堆燃料总成
公开(公告)号：JP2005049134A
公开(公告)日：2005-02-24
申请号：JP2003203956
申请日：2003-07-30
申请人： Toshiba Corp , 株式会社東芝
发明人： MITSUTAKE TORU , HIRAIWA KOJI , SAYANO AKIO
IPC分类号： G21C3/324 , G21C3/06 , G21C3/328 , G21C3/344
CPC分类号： Y02E30/31 , Y02E30/38
摘要： PROBLEM TO BE SOLVED: To restrain a fuel assembly from corroding and enhance its durability by improving the heat removal characteristics of it for a boiling water reactor.
SOLUTION: In the fuel assembly for the boiling water reactor which has fuel rods 2 filled with nuclear fuel, an upper tie plate and a lower tie plate that hold the upper and lower parts of the fuel rods respectively and a metal channel box 4 that surrounds the outer periphery of the lateral sides of the fuel rods 2, at least the upper part of either of the inner surface of the channel box 4, a fuel spacer and a cladding tube is covered with hydrophilic coating. For example, a metallic oxide film is used as the hydrophilic coating.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过改善沸水反应器的除热特性来限制燃料组件腐蚀并提高其耐久性。解决方案：在具有填充有核燃料的燃料棒2的沸水反应堆的燃料组件中，分别固定燃料棒的上部和下部的上部连接板和下部连接板，以及金属通道箱如图4所示，包围燃料棒2的侧面的外周，至少通道箱4的内表面的上部，燃料间隔件和包层管被亲水性涂层覆盖。例如，使用金属氧化物膜作为亲水性涂层。版权所有（C）2005，JPO＆NCIPI

42. 发明专利

JPH07270569A REACTOR CORE AND FUEL ASSEMBLY 失效
公开(公告)号：JPH07270569A
公开(公告)日：1995-10-20
申请号：JP6348594
申请日：1994-03-31
申请人： TOSHIBA CORP
发明人： HIRAIWA KOJI
IPC分类号： G21C5/00 , G21C3/328 , G21C3/62
摘要： PURPOSE:To decrease the reactivity coefficient effectively by making the ratio of the number of replaced fuel rods in a first fuel assembly to the total number of the first fuel rods thereof lower than the ratio of the number of replaced fuel rods in a second fuel assembly to the total number of the second fuel rods thereof. CONSTITUTION:A plurality of different fuel assemblies are arranged in the core 8 of a reactor wherein each numeral enclosed in a square represents the residence cycle in the reactor. A first fuel assembly (MOX fuel) containing plutonium from the time of new fuel is located at hatched position and a second fuel assembly (uranium fuel) is located at other position. The fuel assemblies 9, 10 are loaded substantially equally in their number and the replacement ratio of the assembly 9 to the assembly 10 is set at 20% to 25%. Consequently, the fuel assembly 9 resides for 5 cycles within the core whereas the fuel assembly 10 resides for 4 cycles. This constitution decreases the absolute value of reactivity coefficient of reactor, including the void coefficient, effectively without sacrifice of the average fuel take-out amount of the core.

43. 发明专利

JPH06138272A FUEL ASSEMBLY 失效
公开(公告)号：JPH06138272A
公开(公告)日：1994-05-20
申请号：JP29312692
申请日：1992-10-30
申请人： TOSHIBA CORP
发明人： HIRAIWA KOJI , HIDA KAZUTAKA , ANDO RYOHEI
IPC分类号： G21C3/30 , G21C3/326 , G21C3/328
摘要： PURPOSE:To allow the reduction characteristic of the poison reactivity of a moderator rod with a burnable poison therein to vary linearly. CONSTITUTION:In a fuel assembly 17, wherein nine columns and nine lines of fuel rods 1 9, a moderator rod 10 comprising a burnable poison packed in annular portions 13, 14, 15 formed between outer 11 and inner 12 tubes, and fuel rods 20 each with a burnable poison therein are arranged inside a channel box 18, the density or thickness of the burnable poison is varied in the radial or axial direction of the moderator rod 10. A plurality of moderator rods 10 are used while their thickness, density and outside diameter are varied. Thus an area having plural density and thicknesses is provided so that conventional plural stepwise reactivity can be averaged and approximated to linear variation.

44. 发明专利

JPH026785A FUEL ASSEMBLY 失效
公开(公告)号：JPH026785A
公开(公告)日：1990-01-10
申请号：JP15665888
申请日：1988-06-27
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： UEDA KIYOSHI , HIRAIWA KOJI , NAGANO MAMORU
IPC分类号： G21C3/328 , G21C3/30 , G21C3/32 , G21C3/326 , G21C3/334
摘要： PURPOSE:To allow nuclear reactor shut-down even if enrichment of fuel is increased by disposing an interposing member region of interposing member- contg. fuel to the part where the subcritical degree is shallow during the reactor shut-down so as to enclose a large-diameter water rod. CONSTITUTION:The extra-large diameter water rod 25 is disposed to the central part of the fuel assembly and the fuel rod of sub-bundles facing this water rod 25 is used as the interposing member-contg. fuel rod 22. The long-sized part-long fuel rods 23 are disposed to the center of the sub-bundles positioned in the respective corners and the short-sized part-long fuel rods 24 are disposed around the small-diameter part below the water rod 25. Further, the interposing member 26 of the fuel rod 22 is disposed to the part where the subcritical degree is shallowest during the reactor shut-down. The length of this member 26 is longer than the thermal neutron diffusion distance in the reactor cool state and is

45. 发明专利

JPS63247691A FUEL AGGREGATE 失效
公开(公告)号：JPS63247691A
公开(公告)日：1988-10-14
申请号：JP8212487
申请日：1987-04-02
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： SAKURADA KOICHI , HIRAIWA KOJI , ANDO RYOHEI
IPC分类号： G21C3/328 , G21C3/30 , G21C3/32 , G21C3/326 , G21C3/334

46. 发明专利

JPS63172990A NUCLEAR-REACTOR FUEL AGGREGATE 失效
公开(公告)号：JPS63172990A
公开(公告)日：1988-07-16
申请号：JP323487
申请日：1987-01-12
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： WATANABE SHOICHI , HIRAIWA KOJI
IPC分类号： G21C3/328 , G21C3/28 , G21C3/32 , G21C3/326 , G21C3/62 , G21C7/02 , G21C7/04

47. 发明专利

JPS6398589A FUEL AGGREGATE FOR BOILING WATER TYPE REACTOR 失效
公开(公告)号：JPS6398589A
公开(公告)日：1988-04-30
申请号：JP24422486
申请日：1986-10-16
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： IWAMOTO TATSUYA , HIRAIWA KOJI
IPC分类号： G21C3/328 , G21C3/30 , G21C3/334

48. 发明专利

JPS6264979A FUEL ROD FOR NUCLEAR REACTOR 失效
公开(公告)号：JPS6264979A
公开(公告)日：1987-03-24
申请号：JP20452685
申请日：1985-09-18
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： HIRAIWA KOJI
IPC分类号： G21C3/06 , G21C3/20

49. 发明专利

JPS6262288A CONTROL ROD FOR HIGH-CONVERSION TYPE LIGHT WATER REACTOR 失效
公开(公告)号：JPS6262288A
公开(公告)日：1987-03-18
申请号：JP20161485
申请日：1985-09-13
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： HIRAIWA KOJI
IPC分类号： G21C7/14 , G21C7/10

50. 发明专利

JPS61178693A FUEL AGGREGATE FOR BOILING WATER TYPE REACTOR 失效
公开(公告)号：JPS61178693A
公开(公告)日：1986-08-11
申请号：JP1925085
申请日：1985-02-05
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： HIRAIWA KOJI , NAGANO MAMORU
IPC分类号： G21C3/328 , G21C3/30

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式