乏燃料密封容器开盖及其内容物回取技术研究

Study on Spent Fuel Storage Canister Cutting and Content Withdrawal Technologies

对于采用干湿法贮存的乏燃料而言,其后处理时面临的最大问题是如何安全高效地将乏燃料等内容物从封焊的密封容器中取出。针对这一问题,基于乏燃料密封容器及其内容物的结构特点,开展了乏燃料密封容器开盖及内容物回取技术研究,综合考虑切割热室使用环境、内容物回取后的收集和转移以及产生废物的收集处理等因素,制定了合理可行的开盖及回取工艺,研制了用于开盖和筒体分段切割的解体装置以及回取和吊装工具,并通过试验验证了工艺的可行性以及研制的工装具的可用性。

How to withdraw the spent fuel assemblies from the spent fuel storage canister is a key issue in the reprocessing for the spent fuel with dry and wet storages. Aiming at this issue, based on the structure of the spent fuel storage canister, technologies for spent fuel storage canister cutting and content withdrawal was studied. Considering the hot-cell circumstance, the collecting and transferring of the contents after withdrawal, the collecting and disposal of the generated wastes, the feasible technology of cutting and withdrawal was established, and the storage canister cutting device and special tools was developed. Finally, the feasibility of cutting and withdrawal technology and the usability of cutting device and special tools were validated.