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    EXTENDED OPERATING CYCLE FOR PRESSURIZED WATER REACTOR
    2.
    发明公开
    EXTENDED OPERATING CYCLE FOR PRESSURIZED WATER REACTOR 审中-公开
    加压水反应器的延长操作循环

    公开(公告)号：EP2839467A1

    公开(公告)日：2015-02-25

    申请号：EP13778967.3

    申请日：2013-04-17

    申请人： Babcock & Wilcox MPower Inc.

    发明人： BILOVSKY, Vince, J.

    IPC分类号： G21C3/326 ,  G21C7/04 ,  G21C7/117

    CPC分类号： G21C7/00 ,  G21C1/322 ,  G21C3/326 ,  G21C5/18 ,  G21C7/04 ,  G21C7/08 ,  G21C2003/3262 ,  G21D3/08 ,  Y02E30/32 ,  Y02E30/38 ,  Y02E30/39

    摘要： A pressurized water reactor (PWR) includes a pressure vessel containing a nuclear reactor core immersed in primary coolant water, control rod assemblies (CRA's), and control rod drive mechanisms (CRDM's) operating the CRA's. The reactor core has axially varying 235U enrichment and/or axially varying burnable poison concentration. A CRDM controller controls the CRA's over a burn-up cycle that does not include fuel assembly shuffling and is divided into a plurality of burn-up intervals. The CRDM controller is configured to, for each burn up interval: position the CRA's in accordance with a CRA pattern defining a set of fixed positions for the CRA's except for a sub-set of CRA's designated by the CRA pattern as floating CRA's, and control power level of the PWR by adjusting the floating CRA's without not adjusting the CRA's not designated as floating CRA's. The primary coolant water optionally does not contain soluble neutron poison.

    摘要翻译： 压水反应堆（PWR）包括容纳浸入一次冷却水中的核反应堆堆芯的压力容器，控制棒组件（CRA's）和操作CRA的控制棒驱动机构（CRDM's）。 反应堆堆芯具有轴向变化的235U浓缩和/或轴向变化的可燃中毒浓度。 CRDM控制器通过不包括燃料组件洗牌的燃尽循环来控制CRA，并且被分成多个燃尽间隔。 CRDM控制器被配置为针对每个燃尽间隔：根据CRA模式来定位CRA，CRA模式定义除CRA模式指定的CRA子集之外的CRA的一组固定位置作为浮动CRA，以及控制 通过调整浮动CRA而不调整未被指定为浮动CRA的CRA，PWR的功率水平。 一次冷却水可选地不含可溶性中子毒物。

    Core of light water reactor and fuel assembly
    6.
    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.

    NUCLEAR REACTOR
    8.
    发明公开
    NUCLEAR REACTOR 审中-公开
    KERNREAKTOR

    公开(公告)号：EP2662863A1

    公开(公告)日：2013-11-13

    申请号：EP12732268.3

    申请日：2012-01-05

    申请人： Tokyo Institute of Technology

    发明人： SEKIMOTO, Hiroshi

    IPC分类号： G21C7/30

    CPC分类号： G21C7/30 ,  G21C1/02 ,  G21C3/00 ,  G21C5/18 ,  G21C2003/3262 ,  Y02E30/34 ,  Y02E30/39

    摘要： A nuclear reactor is provided with a core which includes a new fuel part and a burning part at which neutrons are generated and fuel is burned. The burning part moves in a direction toward the new fuel part from the beginning to the end of the combustion cycle. The plurality of the fuel assemblies of the core include the fuel assemblies which are fastened to the core and the fuel assemblies which can move in the longitudinal direction of the fuel assemblies. By pulling out the fuel assemblies from the core, the nuclear reactor can be made to stop. Further, by inserting fuel assemblies into the core from the pulled out state, the nuclear reactor is started up.

    摘要翻译： 核反应堆具有芯，其包括新的燃料部分和产生中子并燃烧燃料的燃烧部分。 燃烧部分从燃烧循环的开始到结束朝向新燃料部分的方向移动。 芯的多个燃料组件包括紧固到芯体的燃料组件和可沿着燃料组件的纵向方向移动的燃料组件。 通过从核心拉出燃料组件，可以使核反应堆停止。 此外，通过从拉出状态将燃料组件插入铁芯，启动核反应堆。