Small pressurized water reactor and containment long-term passive heat removal system

Abstract

The invention belongs to the technical field of reactor safety, and particularly relates to a small pressurized water reactor and a containment vessel long-term passive heat removal system. The systemcomprises a passive residual discharge heat exchanger, a low-pressure safety injection pipeline, a recirculation pipeline, a low-pressure safety injection water tank, a containment pit, a containmentand a condensate water collecting device, wherein the passive residual discharge heat exchanger is immersed in the low-pressure safety injection water tank, the low-pressure safety injection water tank is connected with a reactor descending section through a low-pressure safety injection pipeline, and the containment pit is connected with the reactor descending section through a recirculation pipeline. The safety of the small pressurized water reactor is improved to a brand-new height, long-term effectiveness of waste heat of the reactor can be guaranteed only by depending on air, inherent safety is achieved in design, off-site emergency can be canceled, and economy and plant site adaptability are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of reactor safety, in particular to a long-term passive heat discharge system for a small pressurized water reactor and a containment shell. Background technique [0002] The long-term effective export of reactor waste heat is one of the three major safety functions of the reactor. The waste heat removal system is a special safety facility to deal with nuclear reactor design basis accidents and severe accidents. The existing nuclear reactor safety system widely adopts passive emergency core cooling and passive The waste heat removal system improves the reliability of the system, but for large pressurized water reactors, due to the high level of reactor waste heat, it is difficult to directly use air cooling after the accident, and usually requires a large amount of water as the final heat sink, and Satisfy 72 hours of passive waste heat export to determine the final water source capacity of the hot sink. Fo...

AI Technical Summary

Problems solved by technology

At present, the design of small-scale reactors in the world mostly follows the method of using cooling water source as the final heat sink in large-scale PWRs, and does not cancel the design of the final heat-sink water source according to the characteristics of small-scale PWRs.

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