公开(公告)号：US06512805B1

公开(公告)日：2003-01-28

申请号：US09660356

申请日：2000-09-12

申请人： Renzo Takeda ,  Motoo Aoyama ,  Junichi Miwa ,  Motohiko Ikegawa

发明人： Renzo Takeda ,  Motoo Aoyama ,  Junichi Miwa ,  Motohiko Ikegawa

IPC分类号： G21C104

CPC分类号： G21C3/32 ,  G21C1/08 ,  G21C3/326 ,  G21C5/02 ,  G21C7/117 ,  Y02E30/31 ,  Y02E30/38

摘要： There are provided a light water reactor core which has the same levels in cost efficiency and degree of safety as those of an existing BWR under operation now, that is, which is oriented to plutonium multi-recycle having a breeding ratio near 1.0 or slightly larger and having a negative void coefficient with minimizing modification of the reactor core structure of the existing BWR under operation now, and to fuel assemblies used for the boiling water reactor. The light water reactor core having an effective water-to-fuel volume ratio of 0.1 to 0.6 is formed by combining closed compact lattice fuel assemblies each composed of fuel rods having fuel which is enriched by adding plutonium or plutonium and an actinide to a uranium containing at least one of a depleted uranium, natural uranium, a degraded uranium and a low enriched uranium; high void fraction coolant of 45% to 70%; and large-diameter control rods to be inserted into the fuel assemblies, the large-diameter control rod comprising at least one absorption rod having a transverse cross-sectional area larger than a cross-sectional area of a unit lattice cell of the fuel rod.

摘要翻译： 提供了一种轻水反应堆核心，其成本效益和安全程度与目前运行的现有BWR相同，即面向钚多循环的育种率接近1.0或稍大 并且具有负空隙系数，同时使现有的BWR的反应堆堆芯结构的现有修改最小化，以及用于沸水反应器的燃料组件。 具有有效的水与燃料体积比为0.1至0.6的轻水反应堆核心是通过组合封闭的紧凑格子燃料组合而形成的，每个燃料组合物由具有通过将钚或钚加入的铀和锕系元素富集的燃料的燃料棒组成， 铀，天然铀，退化铀和低浓铀中的至少一种; 45％至70％的高空隙率冷却液; 和大直径控制杆插入到燃料组件中，所述大直径控制杆包括至少一个吸收杆，所述至少一个吸收杆的横截面面积大于所述燃料棒的单元晶格单元的横截面面积。