CapitalEnergy

The emergency core cooling subsystem has been designed to provide long term residual heat removal in case of a primary leak accident concurrent with a station blackout. The hydroaccumulators with nitrogen under pressure will provide the coolant injection during the first stage of such an accident. The active subsystem is connected before the hydroaccumulators are emptied.

Among the design basis conditions, the main accidental transients (blackout, steam line rupture, steam generator tube rupture, and LOCA) were studied with the CATHARE code. All calculations were performed with 4 out of 16 available RRP loops. These four RRPs are automatically actuated with the shutdown signal. In case of failure of the actuation, a control system will actuate other […]

In AHWR, natural circulation is used to remove heat from the reactor core under normal as well as shutdown conditions. Fig. III-2 shows the main heat transport (MHT) system and the passive decay heat removal system of AHWR. The two-phase steam water mixture generated in the core flows through the tail pipes to the steam drum, where steam gets separated […]

Reactor System Reactor Type Power (MW*th) Passive Safety Systems

Integral Reactor System Reactor Power

The core make-up tanks effectively replace the high pressure safety injection systems in conventional PWRs. Each CMT consists of a large volume stainless steel tank with an inlet line that connects one of the cold legs to the top of the CMT and an outlet line that connects the bottom of the CMT to the direct vessel injection (DVI) line. […]

In the event of a core melt accident, pools of water located outside of the reactor pressure vessel will flood the lower part of the reactor cavity outside the pressure vessel. The pools are located above the pressure suppression chamber and are approximately two-thirds full of water. They are physically separated from each other by four equipment compartments containing mechanical […]

The passive cooling systems of the PSRD shown in Fig. XVIII-3 consist of four natural circulation loops: the first one is to transfer decay heat from the core to the SG; the second one from the SG to the EDRS heat exchanger (HEX); the third one from the EDRS-HEX and the CWCS-HEX inside the CV; and the fourth one from […]

The PCCS is a passive system which removes the decay heat released to the containment and maintains the containment within its pressure limits for design basis accidents such as a LOCA. The schematic of the PCCS is shown in Fig. VI-5. The PCC heat exchangers receive a steam-gas mixture from the DW, condense the steam and return the condensate to […]

To substantially limit the release of fission products beyond the containment; a permanent under pressure is maintained in the inter-containment gap of the V-392 design. This safety function, one of the most important, is fulfilled by two systems: (1) an exhaust ventilation system equipped with a filtering plant with suction from the inter-containment gap and outlet into the stack; (2) […]