公开(公告)号：US5963611A

公开(公告)日：1999-10-05

申请号：US986569

申请日：1997-12-05

申请人： Tadashi Narabayashi ,  Miyuki Akiba ,  Shinichi Morooka ,  Mikihide Nakamaru ,  Makoto Yasuoka

发明人： Tadashi Narabayashi ,  Miyuki Akiba ,  Shinichi Morooka ,  Mikihide Nakamaru ,  Makoto Yasuoka

IPC分类号： G21C7/26 ,  B01D45/00 ,  B01D45/16 ,  F22B7/08 ,  F22B37/26 ,  F22B37/32 ,  G21C3/00 ,  G21C3/34 ,  G21C15/16 ,  G21C15/24 ,  G21D3/00 ,  G21D5/12

CPC分类号： F22B37/268 ,  B01D53/24 ,  F22B37/286 ,  G21C15/16 ,  B01D2257/80 ,  Y02E30/37 ,  Y10S55/23

摘要： A separator/injector having an outlet pressure higher than an inlet pressure thereof is introduced instead of the dynamic equipment for a reactor recirculation system that is necessary in the prior art, to achieve both liquid-vapor separation and forced circulation. A jet pump and a recirculation flow-rate control valve are provided in a lower portion of a downcomer portion of a reactor pressure vessel. A shroud head has a double-walled structure, a two-phase liquid-vapor flow that is flowing from a lower portion of the lower shroud head is accelerated by an accelerator nozzle of the separator/injector, and a liquid component of the thus-separated flow is increased in pressure and guided into a jet pump through a space formed between the double shroud heads. Alternatively, a circular cylindrical separator/injector in which the steam nozzle and diffuser are disposed in a helical form in close proximity to the inner wall of a circular tube above the stand pipe could be provided instead of this separator/injector.

摘要翻译： 引入具有高于其入口压力的出口压力的分离器/喷射器，而不是现有技术中必需的用于实现液 - 气分离和强制循环的反应器再循环系统的动力设备。 喷射泵和再循环流量控制阀设置在反应堆压力容器的降液管部分的下部。 护罩头具有双壁结构，从下护罩头的下部流动的两相液相流通过分离器/喷射器的加速喷嘴加速， 分离的流动在压力上增加并且通过形成在双罩头之间的空间被引导到喷射泵中。 或者，可以提供圆柱形分离器/喷射器，其中蒸汽喷嘴和扩散器以螺旋形式设置在立管旁边的圆形管的内壁附近，而不是该分离器/喷射器。