177燃料组件堆芯反应堆机械补偿控制策略研究

177燃料组件堆芯反应堆通常采用G模式运行，负荷跟踪期间需要调整堆芯硼浓度。受硼回收系统能力限制，仅在85%寿期内具备负荷跟踪能力。为改善177燃料组件堆芯反应堆负荷跟踪能力，扩大可进行负荷跟踪的寿期范围，基于177燃料组件堆芯进行了机械补偿控制策略的研究。设计了不同控制棒组布置方案，从控制棒组价值、对功率峰的影响、负荷跟踪过程中控制能力等方面进行了分析。基于优化的控制棒组布置方案和机械补偿控制策略，进行了全寿期基负荷运行、90%寿期末日负荷循环负荷跟踪以及启动过程模拟。结果表明，在适当的控制棒组布置方案下，177燃料组件堆芯可实施机械补偿控制策略，负荷跟踪能力达到了国际先进水平。 

Study on Mechanical Compensation Control Strategy on 177-Fuel-Assembly Core Reactor

Reactor?with?177-fuel-assembly core usually operates in G mode and the core boron concentration requires to be adjusted during?the?load following. Limited by the capacity of the boron recycle system, the?load follow capability?is available?only for 85% of the lifetime. In order to improve the load-following?capability of 177-fuel-assembly core reactor and extend the lifetime of the load?following, a mechanical compensation control strategy based on 177-fuel-assembly core was studied. Different arrangements of control rods?are designed. The control rod worth, the impact of power peak and the control ability during load follow are analyzed. Based on the optimized arrangement of control rods?and the mechanical compensation control strategy, the whole-life base load operation, the end-of-life 90% load cycle load tracking and the starting process simulation are carried out. The results show that under the proper arrangement of the control rods, 177-fuel-assembly core can implement mechanical compensation control strategy,?and the?load following?capability has reached the international advanced level.