Spent fuel storage module

Abstract

The invention relates to a spent fuel storage module which is characterized in comprising a middle container (8) arranged in a storage module boundary and a fuel container (9) arranged in the middle container (8). The storage module boundary is formed by connected components of a storage module concrete structure (7) and a common channel wall (6). Spent fuel storage modules positioned at two sides of the common channel (1) communicate with the common channel (1) through fuel access channels (5) arranged on the common channel wall (6). The spent fuel storage module is suitable for two storage manners which are a dry storage manner and a wet storage manner, such that spent fuel storage modularization and unitization are realized. Also, an integral anti-shock design is adopted, such that accident risk is reduced. Long-time cooling of the spent fuel utilizes passive natural air convection, such that a risk of the loss of cooling capacity is greatly reduced, and nuclear power plant overall safety and economical efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant spent fuel storage and cooling system design, and in particular relates to a spent fuel storage module. 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, being radioactive, and may return to criticality under certain circumstances. Therefore, for any form of nuclear power plant, the intermediate storage, cooling and shielding of spent fuel are unavoidable problems. At present, the intermediate storage of spent fuel mainly includes wet storage and dry storage. Wet storage realizes the storage and cooling of spent fuel by building independent spent fuel storage pools and related systems in or near nuclear power plants; dry storage relies on in a sepa...

AI Technical Summary

Problems solved by technology

The advantage of wet storage is that the system has strong cooling capacity, good tolerance of radioactive substances, and high inherent safety. The disadvantage is that the system is complex and needs to be operated throughout the life of the nuclear power plant; the advantage of dry storage is that it can use the natural circulation of the cooling medium to realize exhaust Fuel cooling, the system structure is simple, the disadvantages are the limited cooling capacity of the system, poor containment capacity of radioactive substances, low inherent safety of the system, etc.

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