Fuel assembly and nuclear reactor
    2.
    发明公开
    Fuel assembly and nuclear reactor 失效
    Brennstoffanordnung und Kernreaktor。

    公开(公告)号:EP0257337A1

    公开(公告)日:1988-03-02

    申请号:EP87111042.5

    申请日:1987-07-30

    申请人: HITACHI, LTD.

    IPC分类号: G21C3/00

    摘要: A fuel assembly (A1; A2; A3) is composed of first fuel rods (15B) containing nuclear fuel material and burnable poison material and second fuel rods (15A) containing nuclear fuel material but no burnable poison material. The fuel assembly (A1; A2; A3) is charged in a high conversion area (59) of a boiling water type nuclear reactor (50) having a reactor core (58) having the high conversion area (59) and a burner area (60) surrounding the high conversion area (59). A ratio V C /V F is not greater than 1.5 in the fuel assembly (A1; A2; A3) where V c is the volume occupied by coolant flow paths and V F is the volume occupied by the nuclear fuel material per unit length in an axial direction of the fuel assembly (A1; A2; A3). In addition, the burnable poison material is composed of neutron absorption nuclides having at least one resonant energy in a neutron energy region of one electron volt or less.

    摘要翻译: 燃料组件(A1; A2; A3)由包含核燃料材料和可燃毒物的第一燃料棒(15B)和包含核燃料材料但不含可燃毒物的第二燃料棒(15A)组成。 将燃料组件(A1; A2; A3)装入具有高转换区域(59)的反应堆堆芯(58)和燃烧器区域(59)的沸水型核反应堆(50)的高转化区域(59) 围绕高转换区域(59)。 燃料组件(A1; A2; A3)中的VC / VF的比率不大于1.5,其中VC是冷却剂流动路径占据的体积,VF是每单位长度在轴向上的核燃料材料占据的体积 燃料组件(A1; A2; A3)。 此外,可燃毒物由中子吸收核素组成,中子吸收核素在一个电子伏特以下的中子能区域具有至少一个共振能。