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1. 发明专利

JP2004219225A Reactor core of boiling water reactor 审中-公开
标题翻译：锅炉水反应堆反应堆核心
公开(公告)号：JP2004219225A
公开(公告)日：2004-08-05
申请号：JP2003006214
申请日：2003-01-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HINO TETSUSHI , AOYAMA TADAO , MOCHIDA TAKAAKI , ISHII YOSHIHIKO
IPC分类号： G21C5/00 , G21C3/328 , G21C5/18
CPC分类号： Y02E30/31 , Y02E30/38
摘要： PROBLEM TO BE SOLVED: To ensure a core shutdown margin and thermal margin and maintain as good economy as a large reactor for a core of a boiling water reactor in a medium size with 600 or small number of loaded fuel assemblies.
SOLUTION: The core 103 of the boiling water reactor comprises 508 fuel assemblies 1 provided each with a plurality of fuel rods 6 arranged in 10×10 rectangular grid and a channel box 11 with an inner width of 13.4 cm surrounding the rods. The grid pitch of the fuel assembly 1 is L (inch) and superficial power density of the core calculated in the condition of L=6.1 is D (kW/1), then D fulfills 55≤D≤60 and 125L-716.25≤D≤125L-710.0.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：确保核心关闭裕度和热裕度，并保持与具有600个或少数负载燃料组件的中等大小的沸水反应堆的核心的大型反应器一样好的经济性。解决方案：沸水反应堆的核心103包括508个燃料组件1，每个燃料组件1设置有布置在10×10矩形网格中的多个燃料棒6和围绕杆的内部宽度为13.4cm的通道箱11。燃料组件1的电网间距为L（英寸），在L = 6.1的条件下计算的核心的表面功率密度为D（kW / 1），则D满足55≤D≤60和125L-716.25≤D ≤125L-710.0。版权所有（C）2004，JPO＆NCIPI

2. 发明专利

JP2004219133A Reactor core of boiling water reactor 审中-公开
标题翻译：锅炉水反应堆反应堆核心
公开(公告)号：JP2004219133A
公开(公告)日：2004-08-05
申请号：JP2003004051
申请日：2003-01-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HINO TETSUSHI , AOYAMA TADAO , MOCHIDA TAKAAKI
IPC分类号： G21C5/00 , G21C5/06 , G21C15/02
CPC分类号： Y02E30/31
摘要： PROBLEM TO BE SOLVED: To ensure thermal margin, increase power and maintain equal economy to a large reactor in a reactor core of a medium-sized boiling water reactor with less than 500 loaded fuel assemblies.
SOLUTION: The core of this boiling water reactor comprises 300 or more and 500 or less fuel assemblies 8 provided with a plurality of fuel rods 9 and surrounding channel boxes 15. When the distance from the channel box center 15 of core horizontal cross section to the core middle point is let L, the shortest L of the outermost layer fuel assemblies 8A arranged outer most core layer is let Lmin and the longest one is let Lmax, each fuel assembly 8 is made 0.8≤Lmin/Lmax≤0.85 and the fraction of the number of outer fuel assembly layer 8B of L≥Lmin in total fuel assembly number is made 25% or more and 40% or less.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：确保热裕度，增加功率，并维持与具有少于500个装载燃料组件的中型沸水反应堆的反应堆堆芯中的大型反应堆相当的经济性。解决方案：该沸水反应堆的核心包括设置有多个燃料棒9和周围通道箱15的300个或更多和500个或更少的燃料组件8.当从芯水平交叉的通道箱中心15的距离将核心中点的截面为L，将布置在最外层芯层的最外层燃料组件8A的最短L设为Lmin，最长的L为Lmax，将各燃料组件8设为0.8≤Lmin/Lmax≤0.85，在总燃料组件号中L≥Lmin的外部燃料组件层8B的数量的分数为25％以上且40％以下。版权所有（C）2004，JPO＆NCIPI

3. 发明专利

JPH11248872A REACTOR CORE AND METHOD FOR OPERATING IT 失效
公开(公告)号：JPH11248872A
公开(公告)日：1999-09-17
申请号：JP5470998
申请日：1998-03-06
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NARITA TAKEMI , MOCHIDA TAKAAKI , NAKAMURA MITSUYA , NAKAYAMA KATSUYUKI , ISHIHARA NAOYUKI
IPC分类号： G21C5/00 , G21C7/08
摘要： PROBLEM TO BE SOLVED: To provide a reactor core, a method for loading fuels and that for operating a reactor that can secure thermal allowance and are excellent in fuel economy without inserting control rods in early and last periods of an operation cycle to secure the thermal allowance. SOLUTION: Basic units 21 shaped like a square are configured by locating two new fuels (for the first cycle) 1 and 1a and two fuels for the third cycle 3 so that new fuels cannot adjoin each other and the fuels for the third cycle 3 cannot do so. One fifth or more of a core is constituted of the basic unit 21. Then, the core is composed so that four fuels 2 for the second cycle 2 can adjoin the new fuels 1 and la in the center zone that accounts for about 70% in the radial direction of the core.

4. 发明专利

JPH10253789A FUEL ASSEMBLY AND CORE 失效
公开(公告)号：JPH10253789A
公开(公告)日：1998-09-25
申请号：JP5511497
申请日：1997-03-10
申请人： HITACHI LTD
发明人： NARITA TAKEMI , HAIKAWA KATSUMASA , YAMANAKA AKIHIRO , KANDA AKIKO , MOCHIDA TAKAAKI , YAMASHITA JUNICHI
IPC分类号： G21C5/00 , G21C3/326 , G21C3/328 , G21C5/12 , G21C7/00
摘要： PROBLEM TO BE SOLVED: To suppress maximum linear power density in control rod side region below a limit value after the withdrawal of control rods even in the case aiming at high burnup. SOLUTION: A diagonal (m) separating the inside of a fuel assembly 1L into the control rod 11 side region and the opposite of control rod 11 side region is drawn to divide into the third region 8 including the 6 fuel rods 4 and 2 water rod on this diagonal (m), the first region 6 in control rod 11 side of the third region 8 and the second region 7 of the opposite side of the control rod 11. In the whole cross section plane positioning lower axial part (1/24 to 10/24), the average enrichment of whole 34 fuel rods 4 existing in the second region 7 is larger by 14% than the average enrichment of whole 34 fuel rods 4 existing in the first region 6. Also in the whole cross section plane positioning upper axial part (11/24 to 22/24), the average enrichment of whole fuel rods 4 existing in the second region 7 is made larger by 7% than the average enrichment of whole fuel rods 4 existing in the first region 6.

5. 发明专利

JP2563492B2 失效
公开(公告)号：JP2563492B2
公开(公告)日：1996-12-11
申请号：JP16040988
申请日：1988-06-28
申请人： HITACHI LTD
发明人： UTSUNO HIDEAKI , YAMASHITA JUNICHI , MOCHIDA TAKAAKI , YOKOMIZO OSAMU , SUGAWARA SATOSHI , OZAWA MICHIHIRO
IPC分类号： G21C3/326 , G21C3/32 , G21C7/27

6. 发明专利

JP2533499B2 失效
公开(公告)号：JP2533499B2
公开(公告)日：1996-09-11
申请号：JP21716586
申请日：1986-09-17
申请人： HITACHI LTD
发明人： YOKOMIZO OSAMU , YOSHIMOTO JUICHIRO , KATAOKA YOSHUKI , KASHIWAI SHINICHI , MASUHARA YASUHIRO , TOMYAMA AKIO , ORII AKIHITO , INOE KOTARO , MOCHIDA TAKAAKI , HAYASHI TATSUO
IPC分类号： G21C3/30 , G21C3/32 , G21C3/322 , G21C3/326 , G21C3/328 , G21C7/22 , G21C7/27 , G21C7/32

7. 发明专利

JPH06174874A FUEL ASSEMBLY AND REACTOR CORE 失效
公开(公告)号：JPH06174874A
公开(公告)日：1994-06-24
申请号：JP32439292
申请日：1992-12-03
申请人： HITACHI LTD
发明人： MASUMI RIYOUJI , AOYAMA TADAO , KOYAMA JUNICHI , ISHIBASHI YOKO , MOCHIDA TAKAAKI , SONEDA HIDEO
IPC分类号： G21C3/326 , G21C3/328 , G21C5/00
摘要： PURPOSE:To provide a fuel assembly which can be enlarged and a reactor core using it by securing thermal tolerance and reactor stop tolerance. CONSTITUTION:The center-to-center distance X between adjacent fuel assemblies 10, 10 is approximately equal to 23cm which is about 1.5 times as large as usual. The thickness of a gap water area is about 16mm, which is the same as usual, so the gap water area is thinned in relation to the distance X. The H/U ratio is about 5, which is the same as usual, and a decrease in unboiled water present in the gap water area is offset by water rods disposed inside a channel box. The ratio of the sectional area of the inside of each water rod to that of a fuel pellet is approximately equal to 0.6 and then the value of a local power range peaking factor can be reduced and thermal tolerance be increased. The sectional area of each water rod 4 is 15cm and then excess reactivity is reduced so that reactor stop tolerance can be secured.

8. 发明专利

JPH05172976A REACTOR CORE 失效
公开(公告)号：JPH05172976A
公开(公告)日：1993-07-13
申请号：JP32282491
申请日：1991-12-06
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MOCHIDA TAKAAKI , FUJITA SATOSHI , SEKINE NOBUO , NISHIMURA AKIRA
IPC分类号： G21C5/12 , G21C5/00 , G21C5/18
摘要： PURPOSE:To simplify the enrichment distribution of MOX fuel in an assembly in the case of loading fuel assemblies of MOX fuel and uranium fuel mixture. CONSTITUTION:A core is constituted of a multitude of uranium fuel assemblies 20 and a small number of MOX fuel assemblies 21. The uranium fuel assembly 20 includes a lot of gadolinia-containing fuel rods and has an enrichment distribution in the axial direction. The MOX fuel assembly 21 includes a small number of gadolinia-containing fuel rods and few kinds of MOX fuel rods and has a homogenious enrichment distribution in the axial direction. As the kinds of fuel rods and the kinds of enrichment of the MOX fuel rod assemblies are a few, the production of the fuel assemblies becomes simple.

9. 发明专利

JPH0452914B2 失效
公开(公告)号：JPH0452914B2
公开(公告)日：1992-08-25
申请号：JP9838784
申请日：1984-05-16
申请人： HITACHI LTD
发明人： MOCHIDA TAKAAKI , OZAWA MICHIHIRO
IPC分类号： G21C3/328 , G21C3/30 , G21C3/62

10. 发明专利

JPH0151795B2 失效
公开(公告)号：JPH0151795B2
公开(公告)日：1989-11-06
申请号：JP498982
申请日：1982-01-18
申请人： HITACHI LTD
发明人： IZUMI KYOSHI , MAKI HIDEO , HATSUTORI NORIAKI , YAMASHITA JUNICHI , MOCHIDA TAKAAKI
IPC分类号： B66C1/28 , B66C1/54 , B66C1/62 , B66C1/66 , G21C5/00 , G21C19/18 , G21C19/19

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