Passive residual heat removal system with heat exchanger located at exterior of water tank for secondary side of marine pressurized water reactor

Abstract

The invention discloses a passive residual heat removal system with a heat exchanger located at the exterior of a water tank for the secondary side of a marine pressurized water reactor, and relates to the field of nuclear reactor safety facilities. The passive residual heat removal system comprises a reactor pressure vessel, a containment and at least one heat removal subsystem, wherein the heatremoval subsystem comprises a steam generator, a condenser, a water tank, a main coolant pipeline, a steam pipeline, a condensate water pipeline and a cooling water circuit; and the steam generator comprises a steam generating part and a heat exchanging part. After an accident, residual heat in a reactor is discharged through the main coolant pipeline between the reactor pressure vessel and the heat exchanging part, the steam pipeline and the condensate water pipeline between the steam generating part and the condenser, and the cooling water circuit between the condenser and the water tank. According to the invention, by utilization of device position difference and medium density difference, a heat transfer medium in the system provided by the invention can passively flow, so the purposeof safe and passive residual heat removal is achieved.

Description

technical field [0001] The invention relates to the field of nuclear reactor safety facilities, in particular to a passive waste heat discharge system with a heat exchanger located outside the water tank on the secondary side of a marine pressurized water reactor. Background technique [0002] With the development of society, people are no longer satisfied with the development of resources on land, and began to exploit marine resources. However, the exploitation of offshore resources, the development of islands, the living of people, and the improvement of the environment all require a continuous supply of energy. [0003] As an emerging energy carrier on the ocean, ships equipped with small pressurized water reactors can provide energy supply for offshore oil exploitation and island development. In addition to fixed-point energy supply at sea, it can also be used for high-power ship energy supply and seawater desalination water supply, which is of great significance to the...

AI Technical Summary

Problems solved by technology

[0005] The marine environment is harsher than the land environment, and the heat removal system in the sea is isolated and unsupported, so that the backup energy is limited and the types are few. Therefore, once the power failure of the whole ship (including emergency energy exhaustion, failure, etc.) occurs, the main pump will stop. Therefore, the flow rate of the reactor pressure vessel coolant decreases, and the heat generated by the core accumulates in a large amount in the reactor pressure vessel coolant system, resulting in an increase in the temperature of the pressurized water reactor.

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