177堆芯控制棒方案改进研究

随着经济发展形势的变化,核电厂运行面临频繁进行负荷跟踪的迫切需求。在177堆芯当前的控制棒方案下,负荷跟踪过程中需进行堆芯的硼化稀释操作,这将产生大量硼废水,增大电厂的运行成本,不利于环境保护。本文借鉴AP1000不调硼负荷跟踪的控制策略设计,对177堆芯控制棒方案进行棒束内及堆芯内的改进,重新评价选定重叠步策略,并基于这些改进后的方案进行不调硼负荷跟踪模拟计算,以评价方案效果。最终本文形成一套可支持不调硼负荷跟踪运行的控制棒方案。

The trends in economy development call for more frequent load follow operation of PWRs. Load follow with current control banks pattern of 177-fuel core need to change boron concentration in the core, which will produce a lot of waste boron water, which increases operation cost of the plant and has adverse effect on environment. Research on improvement of control banks pattern in the assembly and core is introduced. Overlap strategy is also researched to make better load follow performance. With all these improvements, load follow simulation can be conducted with boron concentration kept as constant.