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    • 3. 发明授权
    • Pressurized light water reactor having flow converting grooves for emergency core cooling water
    • 具有用于应急芯冷却水的流动转换槽的加压轻水反应器
    • US06928133B2
    • 2005-08-09
    • US10606411
    • 2003-06-25
    • Tae-Soon KwonChul-Hwa SongWon-Pil BaekJong-kyun Park
    • Tae-Soon KwonChul-Hwa SongWon-Pil BaekJong-kyun Park
    • G21C9/00G21C13/02G21C15/02G21C15/18
    • G21C9/00G21C13/02G21C15/18G21Y2002/207G21Y2002/50G21Y2004/302Y02E30/32
    • A direct vessel injection-type pressurized light water reactor (DVI-PLWR), in which an emergency core cooling water (ECC) is directly injected into a downcomer of a reactor vessel, is disclosed. In order to reduce the ratio of ECC bypass from the downcomer to a broken area of a cold leg in the case of a cold leg guillotine break (CLGB), such as a double-ended guillo4tine break (DEGB), a plurality of corrugations, having a V-shaped cross-section, are vertically arranged around each of the inner surface of a pressure vessel and the outer surface of a core barrel at regular intervals, with a vertical groove formed between two neighboring corrugations. The grooves phase-separate the ECC from a high-speed lateral flow of fluid running in the downcomer, and the separated ECC stagnates in the form of vortexes in the grooves, prior to flowing down to the lower section of the downcomer due to gravity. The DVI-PLWR thus reduces the ratio of ECC bypass, and a large amount of ECC reaches the reactor core in the case of a large break loss-of-cooling water accident (LBLOCA) caused by DEGB. It is thus possible to limit an increase in the maximum cladding temperature of fuel rods, and to prevent the reactor core from being reheated at the late reflood phase after the DEGB-caused LBLOCA, so that the desired thermal hydraulic safety of the DVI-PLWR is secured.
    • 公开了一种直接容器注入型加压轻水反应堆(DVI-PLWR),其中应急芯冷却水(ECC)被直接注入反应堆容器的降液管。 在冷腿断头(CLGB)的情况下,例如双端guillo4tine断裂(DEGB),为了减少ECC旁路从降液管到冷腿的断裂面的比例,多个波纹, 具有V形横截面,以规则的间隔垂直地布置在压力容器的内表面和芯筒的外表面周围,在两个相邻的波纹之间形成有垂直的沟槽。 凹槽将ECC与在降液管中运行的流体的高速横向流相互分离,并且分离的ECC在由于重力向下流到降液管的下部之前在凹槽中以漩涡的形式停滞。 DVI-PLWR因此降低了ECC旁路的比例,并且在由DEGB引起的大的断裂损失水冷却事故(LBLOCA)的情况下,大量的ECC到达反应堆堆芯。 因此,可以限制燃料棒的最大包层温度的增加,并且在DEGB引起的LBLOCA之后防止反应堆芯在后期再掺相中再加热,使得DVI-PLWR的期望的热液压安全性 是安全的。