Passive safety-grade decay-heat removal method and decay-heat removal system for LMR with pool direct heat cooling process

    公开(公告)号:US20050135544A1

    公开(公告)日:2005-06-23

    申请号:US10677941

    申请日:2003-10-01

    IPC分类号: G21C1/02 G21C9/00 G21C15/18

    摘要: Dis0closed herein is a direct pool cooling type passive safety grade decay heat removal method and system for removing core decay heat in a pool type liquid metal reactor when a normal heat removal system breaks down. In the liquid metal reactor comprising a reactor vessel, the interior of which is partitioned into a hot pool above a core and a cold pool around the core so that liquid level difference between the hot pool and the cold pool is maintained by a primary pumping head under normal steady-state conditions, is disposed at least one circular vertical tube in such a manner that the sodium in the circular vertical tube is maintained with the same liquid level as the liquid level of the sodium in the cold pool. In the circular vertical tube is disposed a sodium-sodium heat exchanger, which is connected to a sodium-air heat exchanger mounted above a reactor building via a heat removing sodium loop, in such a manner that it is placed at the position higher than a liquid level of the sodium in the cold pool under the normal steady-state conditions. Under transient conditions, for example, when the normal heat removal system breaks down, the primary pump is automatically tripped, and accordingly the liquid level of the cold pool rises with the result that the liquid level difference between the hot pool and the cold pool is eliminated. Consequently, the sodium-sodium heat exchanger makes direct contact with the hot sodium so that core decay heat is discharged into a final heat sink, for example, the atmosphere. In this way, the decay heat removal system of the present invention is operated on the basis of a completely passive concept with improved operational reliability. Heat loss incurred by the decay heat removal system is minimized under normal steady-state conditions, whereby economical efficiency is maximized. The decay heat removal system of the present invention can effectively remove core decay heat under transient conditions. Moreover, the decay heat removal system of the present invention provides an additional heat removal capacity obtained by the passive vessel cooling system, whereby the decay heat removal system of the present invention can be easily applied to a large thermal rated liquid metal reactor.

    Passive safety-grade decay-heat removal method and decay-heat removal system for LMR with pool direct heat cooling process
    7.
    发明授权
    Passive safety-grade decay-heat removal method and decay-heat removal system for LMR with pool direct heat cooling process 失效
    被动式安全级衰变热去除方法和具有池直接散热过程的LMR的衰减散热系统

    公开(公告)号:US07522693B2

    公开(公告)日:2009-04-21

    申请号:US10677941

    申请日:2003-10-01

    IPC分类号: G21C9/00

    摘要: A direct pool cooling type passive safety grade decay heat removal method and system for removing core decay heat in a pool type liquid metal reactor when a normal heat removal system breaks down. In the liquid metal reactor comprising a reactor vessel, the interior of which is partitioned into a hot pool above a core and a cold pool around the core so that liquid level difference between the hot pool and the cold pool is maintained by a primary pumping head under normal steady-state conditions, is disposed at least one circular vertical tube in such a manner that the sodium in the circular vertical tube is maintained with the same liquid level as the liquid level of the sodium in the cold pool. In the circular vertical tube is disposed a sodium-sodium heat exchanger, which is connected to a sodium-air heat exchanger mounted above a reactor building via a heat removing sodium loop, in such a manner that it is placed at the position higher than a liquid level of the sodium in the cold pool under the normal steady-state conditions.

    摘要翻译: 一种直接游泳池冷却型被动安全等级衰变除热方法和系统,用于在普通散热系统发生故障时,在池式液态金属反应器中去除核心衰变热。 在包括反应器容器的液态金属反应器中,其内部被分配在核心上方的热池和围绕核心的冷库,使得热池和冷库之间的液位差由主泵头保持 在正常稳态条件下,以这样的方式设置至少一个圆形垂直管,使得圆形垂直管中的钠保持与冷库中钠的液面相同的液面。 在圆形垂直管中设置钠钠热交换器,该钠钠热交换器通过除热钠环连接到安装在反应堆建筑物上方的钠空气热交换器,使得它被放置在高于 液态钠在冷库中处于正常稳态条件下。