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1. 发明专利

JP2012122937A Fuel assembly for boiling water reactor 有权
标题翻译：锅炉水反应堆燃料总成
公开(公告)号：JP2012122937A
公开(公告)日：2012-06-28
申请号：JP2010275649
申请日：2010-12-10
申请人： Nuclear Fuel Ind Ltd , 原子燃料工業株式会社
发明人： TAKADA NAOYUKI
IPC分类号： G21C3/328 , G21C3/326
CPC分类号： Y02E30/31 , Y02E30/38
摘要： PROBLEM TO BE SOLVED: To provide a fuel assembly for a BWR, in which cold and hot reactivity of an upper region in the axial direction can be sufficiently reduced, and furthermore a sufficient reactor shutdown margin is assured without impairing the economical efficiency and thermal margin of the reactor even at an early stage of a cycle where the degree of the upper peak of cold and hot neutron flux distribution is relatively small.SOLUTION: In a fuel assembly for a boiling water reactor, a fuel rod containing a burnable poison contains the burnable poison almost throughout its length except in the upper and lower ends of the fuel effective length of a fuel assembly. The fuel assembly comprises: first poison-containing fuel rods each containing at least two burnable poison regions having different burnable poison concentrations when they are not burnt; and second poison-containing fuel rods containing the burnable poison only in a partial axial region from the lower side in the axial direction to the middle of the effective length. The upper end position of the partial axial region, where the second poison-containing fuel rods contain the burnable poison, includes two different kinds of poison-containing fuel rods at a relatively higher position and a relatively lower position.
摘要翻译：要解决的问题：提供一种BWR的燃料组件，其中上部区域在轴向上的冷热反应性可以充分降低，此外，在不损害经济效率的情况下确保足够的反应堆关闭余量和反应堆的热裕度，即使在冷热热中子流量分布的上限程度相对较小的循环的早期阶段。解决方案：在用于沸水反应器的燃料组件中，包含可燃毒物的燃料棒在燃料组件的燃料有效长度的上端和下端几乎包含可燃毒物。燃料组件包括：第一含毒燃料棒，当它们不被燃烧时，每个含有至少两个具有不同可燃毒物浓度的可燃毒物区域; 和第二含毒燃料棒，仅在从轴向的下侧到有效长度的中间的部分轴向区域中含有可燃毒物。第二含毒燃料棒包含可燃毒物的部分轴向区域的上端位置在相对较高的位置和相对较低的位置处包括两种不同种类的含毒燃料棒。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2014119287A Set of fuel assemblies for boiling-water reactor, and reactor core of boiling-water reactor 审中-公开
标题翻译：锅炉水反应堆燃料组件集合和锅炉水反应堆反应堆核心
公开(公告)号：JP2014119287A
公开(公告)日：2014-06-30
申请号：JP2012272777
申请日：2012-12-13
申请人： Nuclear Fuel Ind Ltd , 原子燃料工業株式会社
发明人： MIYAJI TAKAMASA , TAKADA NAOYUKI
IPC分类号： G21C5/00 , G21C3/326 , G21C3/328 , G21C3/62
CPC分类号： Y02E30/31 , Y02E30/38
摘要： PROBLEM TO BE SOLVED: To provide a set of fuel assemblies for BWR and the like, capable of reducing a local peaking factor of a fuel assembly in which a relatively large number of fuel rods containing burnable poison are arranged, thereby further improving safety of a nuclear reactor.SOLUTION: The set of fuel assemblies which are loaded on a reactor core of BWR at the same time and have the same average enrichment includes a first fuel assembly and a second fuel assembly arranged in square lattice arrangement of 10 or more lines and 10 or more rows. The second fuel assembly has an arrangement in which the number of fuel rods containing burnable poison is larger than the number of fuel rods containing the burnable poison in the first fuel assembly and the fuel rods containing the burnable poison are added only on a virtual diagonal line connecting two facing corner parts, out of four corner parts of the square lattice arrangement, and at positions which are not adjacent to a water rod in the matrix direction, relative to an arrangement of the fuel rods in the first fuel assembly.
摘要翻译：要解决的问题：为了提供一种用于BWR等的燃料组件，能够降低其中布置有相对大量含有可燃毒物的燃料棒的燃料组件的局部峰值因数，从而进一步提高了安全性核反应堆。解决方案：同时装载在BWR的反应堆堆芯上并且具有相同的平均浓度的燃料组件组包括第一燃料组件和布置成10个或更多个管线的正方形格子排列的第二燃料组件， 10行或更多行。第二燃料组件具有这样的配置，其中包含可燃毒物的燃料棒的数量大于在第一燃料组件中包含可燃毒物的燃料棒的数量，并且包含可燃毒物的燃料棒仅添加在虚拟对角线上相对于第一燃料组件中的燃料棒的布置，将正方形格栅布置的四个角部分中的两个相对的角部分以及在矩阵方向上不与水杆相邻的位置连接。

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