Cooling and purifying system of spent fuel pool

Abstract

The invention relates to a cooling and purifying system of a spent fuel pool. The cooling and purifying system is arranged in the spent fuel pool, and comprises a cooling structure (5) formed at the upper part of the spent fuel pool; and the cooling structure (5) is parallel to a vertical direction of a pool wall. According to the system provided by the invention, all main processes for storing spent fuel and maintenance operation can be completed in the spent fuel pool without moving and circulating a water body inside the spent fuel pool, so that risks of diffusion of radioactive matter and losing of cooling of the stored fuel are reduced, and the security and the economical benefits of fuel storage are greatly improved. Furthermore, the system can realize a foam bypass function of the surface of the spent fuel pool simultaneously.

Description

technical field [0001] The invention belongs to the technical field of spent fuel storage, and in particular relates to a spent fuel pool cooling and purification system. Background technique [0002] Spent fuel storage is an important stage of the nuclear fuel cycle. Nuclear power plants need to continuously replace new nuclear fuel and unload used spent fuel throughout their lifetime. Spent fuel has the characteristics of continuously emitting decay heat, radioactivity, and may return to criticality under certain circumstances. Therefore, for any form of nuclear power plant, the storage safety of spent fuel is an unavoidable problem. The main process of spent fuel storage includes: water cooling, filtration and desalination. In the past design of commercial nuclear power systems, these processes are usually completed outside the spent fuel pool, that is, the water in the spent fuel pool is pumped out through the pump, cooled, filtered and desalted before being discharged ...

AI Technical Summary

Problems solved by technology

The advantage of this working method is that the principle is simple and direct, the function realization requires less equipment and the system has a large functional margin; the disadvantage is that the system pipeline is complex, there are many equipment, and they are located in different rooms or even in different areas of the power plant. Internally, the coolant may be lost during the migration cycle, endangering the safety of fuel storage. In addition, radioactive impurities may also pollute the environment due to the migration cycle of the coolant, the replacement of filter elements and resins

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