US 12,406,775 B2
Reactor secondary side passive residual heat removal system
Zhan Liu, Shanghai (CN); Di Liu, Shanghai (CN); Haitao Wang, Shanghai (CN); Bo Yang, Shanghai (CN); Kemei Cao, Shanghai (CN); and Zhanfei Qi, Shanghai (CN)
Assigned to SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO., LTD., Shanghai (CN)
Appl. No. 17/996,528
Filed by SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO., LTD., Shanghai (CN)
PCT Filed Apr. 21, 2021, PCT No. PCT/CN2021/088570
§ 371(c)(1), (2) Date Oct. 19, 2022,
PCT Pub. No. WO2021/213415, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 202010332404.6 (CN), filed on Apr. 24, 2020.
Prior Publication US 2023/0223160 A1, Jul. 13, 2023
Int. Cl. G21C 15/18 (2006.01); G21C 15/12 (2006.01); G21C 15/243 (2006.01); G21C 17/032 (2006.01); G21D 3/04 (2006.01)
CPC G21C 15/12 (2013.01) [G21C 15/18 (2013.01); G21C 15/243 (2013.01); G21C 17/032 (2013.01); G21D 3/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A reactor secondary side passive residual heat removal system, wherein the system comprises:
a containment vessel;
a steam generator having a steam outlet and a feedwater inlet;
a water tank in which a heat exchanger is arranged, the heat exchanger having a heat exchanger inlet and a heat exchanger outlet; and
a steam driven pump having a steam port, a water inlet and a water outlet;
wherein the steam generator, the water tank and the steam driven pump are placed in the containment vessel, the heat exchanger inlet is communicated with the steam outlet of the steam generator through a first pipe, the heat exchanger outlet is communicated with the water inlet of the steam driven pump through a second pipe, the water outlet of the steam driven pump is communicated with the feedwater inlet of the steam generator through a third pipe, and the steam port of the steam driven pump is communicated with the first pipe through a fourth pipe,
wherein a first amount of steam generated from heat absorption by the steam generator enters the heat exchanger through the first pipe, and the first amount of steam is condensed into liquid water after heat exchange with water in the water tank,
the liquid water in the heat exchanger flows into the second pipe through the heat exchanger outlet, and flows into the water inlet of the steam driven pump through the second pipe,
the steam driven pump drives the liquid water to flow into the third pipe through the water outlet, and flows to the feedwater inlet of the steam generator,
a second amount of steam generated from heat absorption by the steam generator flows to the steam port of the steam driven pump through the fourth pipe to drive the steam driven pump,
wherein the steam outlet of the steam generator communicates directly with the steam port of the steam driven pump and the heat exchanger inlet.