公开(公告)号：EP2922066A4

公开(公告)日：2016-07-13

申请号：EP12888573

申请日：2012-11-16

申请人： HITACHI GE NUCLEAR ENERGY LTD

发明人： KUROITA SHO ,  SAWAHATA SADAKATSU ,  MABUCHI YASUHIRO ,  ASAKURA HIROAKI ,  HIROKAWA FUMIHITO

IPC分类号： G21C1/08 ,  G21C15/26

CPC分类号： G21C15/26 ,  G21C1/084 ,  Y02E30/31

摘要： The present invention provides a chimney for a natural-circulation boiling water reactor having structural soundness capable of standing a horizontal load generated by a flow-induced vibration, an earthquake and the like. The chimney for a natural-circulation boiling water reactor according to the present invention is characterized in that: the chimney is disposed in the inside of a reactor pressure vessel, and includes plural flow channels which guide a steam-water two-phase flow generated in a reactor core to the upper part of the reactor pressure vessel; each of the flow channels is formed partitioned by plural flow channel separation walls whose lower-most part is supported by a chimney lattice plate; and chimney spacers that support the horizontal load each other are arranged between the flow channel separation walls of the adjacent flow channels, and ring-like members that support the horizontal load are arranged at the outermost periphery of the plural flow channels that are supported by the chimney lattice plate.