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    Core of light water reactor and fuel assembly
    3.
    发明授权
    Core of light water reactor and fuel assembly 有权
    轻水反应堆和燃料组件的核心

    公开(公告)号：EP2230668B1

    公开(公告)日：2018-03-28

    申请号：EP10005767.8

    申请日：2008-01-24

    申请人： Hitachi, Ltd.

    发明人： Takeda, Renzo ,  Miwa, Junichi ,  Moriya, Kumiaki

    IPC分类号： G21C1/08 ,  G21C3/42

    CPC分类号： G21C1/084 ,  G21C3/328 ,  G21C5/00 ,  G21C2003/3262 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2002/60 ,  G21Y2004/10 ,  G21Y2004/30 ,  G21Y2004/403 ,  Y02E30/31 ,  Y02E30/38

    摘要： The core flow rate of a boiling water reactor (BWR) (19) is adjusted so that it reaches a core flow rate setting that is determined from the characteristic according to the ratio of Pu-239 in transuranic nuclides (TRU) included in a new fuel assembly (1) to be loaded in a core (20). The core flow rate is maintained at the set core flow rate in all operation cycles of the BWR (19). Accordingly, the ratios of a plurality of TRU isotopes included in a fuel assembly (1) when the fuel assembly (1) is taken out of the BWR core (20) as a spent fuel is substantially the same as the ratios of the plurality of TRU isotopes included in a new fuel assembly (1) to be loaded in the BWR core (20). The ratio of Pu-239 in TRU included in the new fuel assembly (1) is 3% or more but 45% or less. As a result, a nuclear proliferation resistance can be increased while restrictive conditions for safety are met, a burnup can be further increased, and TRU multi-recycling becomes feasible.

    Boiling water reactor core and fuel assemblies therefor
    10.
    发明公开
    Boiling water reactor core and fuel assemblies therefor 有权
    Siedewasserreaktorkern

    公开(公告)号：EP2618333A2

    公开(公告)日：2013-07-24

    申请号：EP13164447.8

    申请日：2004-03-18

    申请人： Hitachi Ltd.

    发明人： Takeda, Renzou ,  Aoyama, Motoo ,  Miwa, Junichi ,  Ikegawa, Tomohiko ,  Moriya, Kumiaki

    IPC分类号： G21C1/08 ,  G21C3/32 ,  G21C3/326 ,  G21C5/18

    CPC分类号： G21C3/326 ,  G21C1/084 ,  G21C3/32 ,  G21C5/18 ,  Y02E30/31 ,  Y02E30/38

    摘要： A ratio of the number of fuel assemblies loaded on a core to the number of control rod drive mechanisms is 3 or more. The fuel assembly itself contains mixed oxides of a low enrichment concentration uranium oxide containing 3 to 8 wt % in the average enrichment concentration of the fuel assembly, or mixed oxide containing not less than 2 wt %, but less than 6 wt % in the average enrichment concentration of fissile plutonium. In the burner type BWR core on which the fuel assemblies are loaded, an average weight density of uranium, plutonium and minor actinides is 2.1 to 3.4 kg/L as a conversion at the value of unburned state.

    摘要翻译： 负载在芯上的燃料组件的数量与控制棒驱动机构的数量的比率为3以上。 燃料组件本身含有燃料组合物的平均富集浓度为3〜8重量％的低富集浓度铀氧化物的混合氧化物，或平均浓度为2重量％以上且小于6重量％的混合氧化物 易裂变钚浓缩浓度。 在装载有燃料组件的燃烧器型BWR铁心中，作为未燃烧状态下的转化率，铀，钚和次锕系元素的平均重量密度为2.1〜3.4kg / L。