2MWt液态燃料钍基熔盐实验堆滞留盘管优化设计

Design Optimization of Retention Coil for 2MWt Liquid Fuel Thorium-based Molten Salt Experimental Reactor

液态燃料钍基熔盐实验堆滞留盘管是熔盐堆尾气处理系统的重要核安全级设备,为尾气中短寿命核素衰变提供封闭环境,同时去除衰变热,降低其后碘吸附床和活性炭吸附床的温度。本文介绍了业主提供的2 MWt液态燃料钍基熔盐实验堆滞留盘管原设计方案中存在的问题及结构优化后的新设计方案。优化后的滞留盘管设计方案具有散热性好、泄漏点少(焊缝少)、容易施焊、便于检测监控维修、用材少等优点,具有较好的可靠性和经济性。

The retention coil of liquid fuel thorium-based molten salt experimental reactor is an important nuclear safety equipment in the tail gas treatment system of molten salt reactor,which provides a closed environment for the decay of short-lived nuclides in the tail gas,removes the decay heat at the same time,and reduces the temperature of the iodine adsorption bed and the activated carbon adsorption bed downstream it.This paper introduces the problems existing in the original design scheme of the retention coil of the 2 MWt liquid fuel thorium-based molten salt experimental reactor provided by the owner and the new design scheme after structural optimization.The optimized design scheme of retention coil has the advantages of good heat dissipation,few leakage points(few welds),easy welding,easy inspection,monitoring and maintenance,less materials,etc.,and has good reliability and economy.