Steam generator secondary side passive residual heat removal system

Abstract

The invention discloses a steam generator secondary side passive residual heat removal system. The system comprises: a heat exchanger, which is placed in a cooling water tank, with one end of a condensation water pipe being connected to a lower seal head of the heat exchanger, and the other end being connected to a main water supply pipe of the steam generator; a steam pipeline, one end of which is connected to an upper seal head of the heat exchanger, and the other end of which is connected to a steam outlet of the steam generator; N water-replenishing tanks, the upper parts of which are communicated with the steam pipeline, and the lower parts of which are communicated with the condensation water pipe; M air coolers, the evaporation sections of which are arranged in the cooling water tank, and the condensation sections of which are arranged in the atmosphere outside the cooling water tank. The steam generator secondary side passive residual heat removal system provided by the invention reaches the technical effects of long-term export of core residual heat and maintenance of the reactor at a safe state.

Description

technical field [0001] The invention relates to the accident response field of a pressurized water reactor nuclear power plant, in particular to a secondary side passive waste heat discharge system of a steam generator. Background technique [0002] After the plant-wide power outage, the main pump was shut down, the flow rate of the reactor coolant decreased sharply, and the feed water on the secondary side of the steam generator was lost at the same time, resulting in a decrease in the heat transfer capacity of the steam generator, and the heat generated by the core was in the reactor coolant system. accumulation, causing the system temperature to rise. After a plant-wide blackout accident, whether the remaining heat release can be effectively discharged for a long time is related to the safety of the nuclear power plant (station). [0003] In the past, nuclear power plants (stations) could only provide feed water to the secondary side of the steam generator through the st...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a passive waste heat discharge system on the secondary side of a steam generator, which solves the problem of limited passive heat discharge time in the passive heat discharge system on the secondary side of the steam generator in the prior art and affects the core waste heat. The technical problem of long-term discharge has realized the technical effect of the passive waste heat discharge system on the secondary side of the steam generator to export the waste heat from the core for a long time and maintain the reactor in a safe state

Images