乏燃料干法贮存密封贮存罐设计及关键技术分析  

Analysis on Design and Key Technologies of Dry Storage Canister for Spent Fuel under Dry Storage

作　　者：张白茹 李馨楠 姚琳 ZHANG Bairu;LI Xinnan;YAO Lin(Nuclear Equipment Division,China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司核设备所,北京100840

出　　处：《包装工程》2025年第1期273-278,共6页Packaging Engineering

摘　　要：目的乏燃料干法贮存是解决我国目前部分核电站乏燃料无法外运的有效途径,密封贮存罐是乏燃料干法贮存系统的关键设备,用于离堆贮存乏燃料组件。为此开展乏燃料干法贮存密封贮存罐设计及关键技术分析。方法对干法贮存系统的工艺和安全功能需求进行分析,从接口功能要求开展设计,论述了乏燃料组件支撑结构和包容边界的设计方案;通过对临界安全设计关键技术的分析,从对乏燃料组件间距的控制到对中子材料的选择和布局逐一剖析,确定了可维持乏燃料组件次临界状态的临界安全结构;通过传热方式分析、传热介质比选、传热结构布局,设计了非能动散热的传热结构,并提出了全新拼插形式的结构设计方案。结果提出了干法贮存系统设计的关键技术,确定了密封贮存罐的设计准则,并根据相应准则提出了密封贮存罐设计关键技术解决方案,最终完成了密封贮存罐整体结构的设计。结论密封贮存罐的设计及关键技术分析为解决我国乏燃料干法贮存提供了切实可用的技术支撑。Dry storage of spent fuel is an effective way to solve the problem that spent fuel cannot be transported from some nuclear power plants in China.The dry storage canister is the key equipment of the dry storage system for spent fuel,which is used for off-reactor storage of spent fuel.Therefore,the work aims to analyze the design and key technologies of the dry storage canister for spent fuel under dry storage.The process and safety function requirements of dry storage system were analyzed and the design was carried out based on the functional requirements of interface.Then,the design scheme of component support structure and containment boundary was discussed.By analyzing the key technologies of critical safety design,from the control of spent fuel assembly spacing to the selection and layout of neutron materials,the critical safety structure able to maintain the subcritical state of spent fuel assembly was determined.Through the analysis of heat transfer mode,the comparison and selection of heat transfer medium,and the layout of heat transfer structure,the heat transfer structure of passive heat dissipation was designed,and a new structural design scheme of the interlocking form was proposed.The key technologies of dry storage system design were put forward,the design criteria of dry storage canister were determined,and the key technologies and solutions of dry storage canister design were put forward,and the final design of the dry storage canister structure was completed.The analysis on the design and key technologies of dry storage of spent fuel provides practical technical support for dry storage of spent fuel in China.

关 键 词：干法贮存 乏燃料组件 密封贮存罐 

分 类 号：TL933[核科学技术—辐射防护及环境保护]