公开(公告)号：US5337337A

公开(公告)日：1994-08-09

申请号：US857263

申请日：1992-03-25

申请人： Motoo Aoyama ,  Ryoji Masumi ,  Yooko Ishibashi ,  Kunitoshi Kurihara

发明人： Motoo Aoyama ,  Ryoji Masumi ,  Yooko Ishibashi ,  Kunitoshi Kurihara

IPC分类号： G21C3/30 ,  G21C3/328 ,  G21C3/32

CPC分类号： G21C3/328 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/38

摘要： A fuel assembly comprising a plurality of fuel rods, where fuel rods containing a burnable poison element having a smaller neutron absorption cross-section such as boron are provided in a region of soft neutron energy spectrum and a large thermal neutron flux and fuel rods containing a burnable poison element having a larger neutron absorption cross-section such as gadolinium and fuel rods containing no such burnable poison element are provided in other region of average neutron energy spectrum, has a flat fuel rod power distribution throughout the fuel lifetime even against substantially uniform uranium enrichment distribution with reduced parasitic neutron absorption by gadolia, that is, with higher burnup and reduced fuel cycle cost.

摘要翻译： 一种燃料组件，其包括多个燃料棒，其中在软中子能谱范围内设置含有具有较小中子吸收截面的可燃毒元素的燃料棒，例如硼，并且包含大量热中子通量和含有 在其他平均中子能谱区域中提供了具有较大中子吸收截面的可燃毒物元素，例如钆和不含这种可燃毒物元素的燃料棒，在整个燃料使用寿命期间具有扁平的燃料棒功率分布，甚至基本上均匀的铀 浓缩分布减少钆的寄生中子吸收，即燃耗增加和燃料循环成本降低。