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    BOTTOM NOZZLE FILTER DEVICE AND DEBRIS-RESISTANT BOTTOM NOZZLE USING THE DEVICE
    2.
    发明公开
    BOTTOM NOZZLE FILTER DEVICE AND DEBRIS-RESISTANT BOTTOM NOZZLE USING THE DEVICE 有权
    BOTTOM JETS过滤装置和存款耐磨地坪工具与此设备

    公开(公告)号：EP2642488A1

    公开(公告)日：2013-09-25

    申请号：EP11873994.5

    申请日：2011-10-14

    申请人： China Nuclear Power Technology Research Institute ,  China Guangdong Nuclear Power Holding

    发明人： YU, Wenchi ,  LI, Weicai ,  ZHOU, Yuemin ,  LV, Xianfeng ,  GUO, Yan ,  LIU, Yuli

    IPC分类号： G21C3/30 ,  B01D35/02

    CPC分类号： G21C3/3206 ,  B01D29/03 ,  B01D35/02 ,  G21C3/322 ,  G21C3/3305 ,  Y02E30/38

    摘要： The present invention relates to a bottom nozzle filtering device and a debris-preventive bottom nozzle that can be used for a light water reactor (LWR) nuclear fuel assembly. The bottom nozzle filtering device includes a plurality of successively spliced unit plates; a through flow channel is formed between the spliced adjacent unit plates; the flow channel includes a plurality of spaced straight-section flow inlets, and a plurality of spaced straight-section flow outlets, as well as a flow subchannel communicating with the straight-section flow inlets and the straight-section flow outlets; the outlet section of each straight-section flow inlet in the middle splits respectively into two flow subchannels, and the inlet section of each straight-section flow outlet in the middle communicates respectively with the two flow subchannels. The flow direction of the coolant is controlled by the straight-section flow inlet, the straight-section flow outlet, the flow subchannel, etc. to prevent unnecessary eddies forming, making the pressure loss effectively controlled; after a large size debris is stopped, the flow enters the flow subchannel to be filtered again, realizing staged filtering, thus improving the filtering effect.