Dry storage of spent fuel is an effective approach to address the issue of full capacity in the Qinshan Phase II pool, ensuring the normal operation of the units. Therefore, the work aims to design dry storage systems and equipment for spent fuel. By analyzing the regulatory requirements and user interface requirements for dry storage systems of spent fuel, specific equipment design requirements were proposed, and key components for dry storage systems of spent fuel were designed. The spent fuel dry storage system was equipped with independent dry storage canisters, transfer casks, and horizontal storage modules. In the dry storage canister, subcritical control and containment structures were designed for spent fuel. The transfer cask was set up with radiation protection and heat transfer structures during the transfer process. The horizontal storage module was provided with radiation protection and heat transfer structures during the storage period. Through equipment safety analysis and calculation under normal, abnormal, and accident conditions, it was demonstrated that all stages of the transfer operation and storage process of the dry storage system for spent fuel met the equipment design requirements. This design provides a practical and applicable reference for dry storage of spent fuel in China.
Key words
dry storage /
spent fuel assembly /
system equipment
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