Residual heat removal system of nuclear reactor

Abstract

The invention aims to provide a residual heat removal system of a nuclear reactor, which is used for enhancing the reliability of residual heat removal of the nuclear reactor. The residual heat removal system of the nuclear reactor comprises a main reactor cooling agent, a residual heat exchanger, a passive water feeding tank and a spraying device; a work medium flows into an inlet of the residual heat exchanger from the passive water feeding tank, and is used for absorbing heat of the main reactor cooling agent, which is transmitted by the residual heat exchanger; then, the work medium flows to the spraying device from an outlet of the residual heat exchanger and then is sprayed into the passive water feeding tank from the spraying device; the passive water feeding tank is higher than the residual heat exchanger.

Description

technical field [0001] The invention relates to a safety protection system of a nuclear reactor, in particular to a waste heat discharge system of a nuclear reactor. Background technique [0002] The waste heat removal system is an important measure for reactor safety protection. In the event of an accident, since the reactor continues to generate decay heat after shutdown, the decay heat needs to be discharged to avoid heat accumulation in the reactor and damage to the core and pressure boundary due to excessive temperature and pressure. [0003] Chinese utility model patent 201020227239.X (document 1) discloses a safety system for ensuring the safety of nuclear power plants, which relates to a safety system for ensuring the safety of nuclear power plants. The equipment and space in the containment are sprayed and cooled, which can take away the heat in the containment, reduce the pressure in the containment, and prevent the overpressure of the containment. Furthermore, h...

AI Technical Summary

Problems solved by technology

The system takes away the decay heat from the secondary side of the steam generator of the nuclear power plant system, and the heat taken away is transferred to the steam condensate tank in the containment through the passive waste heat discharge heat exchanger on the secondary side, and the temperature and pressure reduction function of the containment It is realized by spraying inside the containment, that is to say, it is similar to the deficiency of Document 1, that is, it only brings the heat of the reactor core into the containment, and the design of the reactor requires that the heat must be transferred to the final heat sink , so another set of equipment is needed to bring the heat to the final heat sink outside the containment, the system is complex, there are many intermediate processes, and the probability of system failure will inevitably increase; The water tank device, so the water volume in the system is small, and it is difficult to ensure the reliable operation of the system only by relying on the initial water volume of the steam generator;

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