VVER机组一回路加氨量化控制方法的研究

Study on Quantitative Control of Feeding Ammonia Solution to the Primary Coolant of VVER Unit

通过对一回路净化和除气流程的深入研究,针对一回路中各主要物质及产物的相互关系,经过物料衡算,总结出不同工况下一回路连续加氨的量化控制方法,降低了功率运行时因加氨量不平衡导致的溶氢、总碱金属(钾、钠、锂的物质的量的总和)等一回路水化学控制指标偏离的风险,优化了一回路水化学工况,为今后的工作提供了理论指导。

Through study on the process of purification and deaeration in the primary loop, the quantitative control methods of feeding ammonia solution continuously to the primary coolant were summarized in different operating modes by material balance calculation of the main adding substances and products in the primary coolant. The methods reduced the risks of control parameters for the primary coolant deviating from zone A, such as dissolved hydrogen and total molar concentration of alkaline metal ions （potassium, sodium and lithium）, caused by feeding ammonia solution inaccurately during unit operating. They also improved quality of the primary coolant and provided a theoretical guidance for future work.