Overpressure protection system for reactor cabin

Abstract

The invention discloses an overpressure protection system for a reactor cabin. The system comprises a pressure relief pipe, a multi-stage pressure relief assembly, a pressure suppression assembly anda sewage tank; the inlet end of the pressure relief pipe communicates with the interior of the reactor cabin; the multi-stage pressure relief assembly is arranged in the pressure relief pipe or on a bypass branch pipe of the pressure relief pipe; the pressure suppression assembly communicates with the pressure relief pipe; an inlet of the sewage tank communicates with the bottom of the reactor cabin through a safety drainage pipeline; an outlet of the sewage tank communicates with a radioactive wastewater treatment system; the pressure relief assembly comprises pressure relief valves and first-stage rupture discs, wherein the pressure relief valves are arranged on the bypass branch pipe, the first-stage rupture discs are arranged in the pressure relief pipe, and connection points of the bypass branch pipe and the pressure relief pipe are positioned at two ends of the first-stage rupture discs; and the pressure relief assembly further comprises second-stage rupture discs, wherein the second-stage rupture discs are arranged in the pressure relief pipe. The overpressure protection system disclosed by the invention has the beneficial effects that the multi-stage pressure relief assembly is used for carrying out grading pressure relief treatment and overpressure protection on a reactor cabin after a coolant leaks.

Description

technical field [0001] The invention relates to the field of nuclear safety engineering design, in particular to a reactor cabin overpressure protection system. Background technique [0002] As the heart of a nuclear powered ship, the safe operation of the reactor is of paramount importance. Reactor, steam generator, circulation pump, pressurizer and coolant pipeline constitute the nuclear steam supply system (primary circuit), which is arranged in the reactor cabin. When a coolant pipeline is damaged somewhere, a coolant leakage accident occurs, which is also a serious accident in nuclear safety design. The high-temperature and high-pressure coolant (water) immediately turns into water vapor after entering the reactor compartment, causing the reactor compartment Internal pressure rises rapidly. [0003] After the coolant leakage accident occurs, even if the reactor stops running, the leaking coolant will still cause the internal pressure of the reactor cabin to continue t...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a reactor compartment overpressure protection system to solve the problem of reactor compartment leakage caused by coolant leakage in the prior art. Excessive internal pressure will affect the safety of the reactor compartment and internal equipment

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