公开(公告)号：US20140241484A1

公开(公告)日：2014-08-28

申请号：US13778565

申请日：2013-02-27

Applicant: WESTINGHOUSE ELECTRIC COMPANY LLC

Inventor： Jun Liao ,  Vefa N. Kucukboyaci

IPC: G21C9/004

CPC classification number: G21C9/004 ,  G21C1/086 ,  G21C1/322 ,  G21C15/18 ,  Y02E30/32

Abstract: A passive cooling system of a pressurized water reactor that relies on a depressurization system to reduce the pressure in the reactor vessel in the event of a loss of coolant accident and vent the steam generated by the decay heat of the reactor core in a post loss of coolant accident stage. The depressurization results in a low pressure difference between the reactor vessel and the containment and enables gravity driven cooling system injection into the reactor vessel. The depressurization system includes a flow restrictor within an orifice in the reactor vessel wall that connects to a vent pipe which forms a flow path between the interior of the reactor vessel and the containment atmosphere when a valve within the vent pipe is in an open position. Preferably, the flow restrictor is a venturi that has a gradual contraction and a gradual expansion in the flow path area.

Abstract translation: 压缩水反应堆的被动冷却系统，其依赖于减压系统以在冷却剂事故损失的情况下降低反应堆容器中的压力，并且在反应堆堆芯的后损失中排出由反应堆堆芯的衰变热产生的蒸汽 冷却液事故阶段。 减压导致反应堆容器和容器之间的低压差，并使重力驱动冷却系统注入反应器容器。 减压系统包括在反应器容器壁中的孔内的限流器，其连接到排气管，该排气管在通气管内的阀处于打开位置时形成反应容器内部和容纳气氛之间的流动路径。 优选地，限流器是文氏管，其在流动通道区域中具有逐渐收缩和逐渐膨胀。