Safety injection system and nuclear power system

Abstract

The embodiment of the invention provides a safety injection system and a nuclear power system. The safety injection system includes: a core makeup tank, an accumulator, a safety injection pump and a secondary circuit pressure relief device. A first interface of the core makeup tank, a first interface of the safety injection pump and a first interface of the accumulator are respectively communicated with a cold leg, and a second interface of the core makeup tank is communicated with a third interface of a steam generator; the secondary circuit pressure relief device is communicated with a fourth interface of the steam generator; when a safety signal is triggered, the core makeup tank injects a first coolant into a pressure container through the cold leg; when the pressure of a primary circuit is lower than that of the accumulator top, the accumulator injects a second coolant into the pressure container through the cold leg; and / or when the pressure of the primary circuit is lower than apreset value, the safety injection pump injects a third coolant into the pressure container. The safety injection system and nuclear power system provided by the invention reduce the release of radioactive substances, and are beneficial to the recovery of power plants after rupture accidents.

Description

technical field [0001] The invention relates to the field of nuclear power plant safety facility design, in particular to a safety injection system and a nuclear power system. Background technique [0002] There are many kinds of safety injection systems, and the existing safety injection systems include: AP1000 passive safety injection system (Passive Core Cooling System, PXS), CPR1000 safety injection system and EPR safety injection system, etc. [0003] Among them, the AP1000 passive safety injection system includes: core makeup water tank, accumulators (ACC), containment refueling water storage tank (In-containment Refueling Water Storage Tank, IRWST) and passive waste heat removal heat exchanger. At the same time, the valves and sprinklers of the automatic depressurization system as part of the primary circuit are also important functional components of PXS. In a small breach accident, the initial core make-up water tank supplies water to the core, but the primary circ...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a safety injection system and a nuclear power system, which can ensure that the safety injection can be injected in time after a small breach accident occurs, and at the same time avoid a large amount of radioactive coolant entering the primary circuit after a small breach accident occurs Difficulty in containment and accident recovery

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