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以氨作为二回路p H调节剂的压水堆普遍采用高pH控制,以抑制二回路水汽系统的流体加速腐蚀(FAC);而提高pH会由于氨浓度的升高而使蒸汽发生器排污系统(APG)除盐床树脂使用周期缩短,引发废物增加、运行成本上升和工作量增加等问题。通过秦山第二核电厂APG除盐床的氨化运行试验,分析认为APG除盐床氨化运行是可行的,是缓解高pH和树脂周期缩短冲突的有效途径,并优先考虑2个除盐系列采用一列氨化和一列氢型运行方式。
High pressure pH control is commonly used in PWRs where ammonia is used as the second-loop p H regulator to suppress fluid accelerated corrosion (FAC) in the second-loop water vapor system; while increasing the pH will cause the steam generator blowdown system (APG) De-salting bed resins have shorter pot life, lead to increased waste, higher operating costs and increased workload. Through the ammoniation operation test of APG desalination bed in Qinshan No.2 nuclear power plant, it is considered that the ammoniation of APG desalting bed is feasible and effective way to alleviate the conflict between high pH and resin cycle shortening. Two desalination series A column of ammoniated and a hydrogen-type operation mode.