核电厂凝结水精处理系统导致二回路水质钠离子浓度升高的原因分析与改进

某蒸汽发生器排污系统（APG）中钠离子浓度超标，无法满足世界核运营者协会（WANO）国际先进化学指标。本文对核电厂二回路存在钠离子带入的可能原因以及凝结水精处理系统（ATE）运行前、后水质指标的差异进行分析，得出ATE的树脂再生性能直接决定了蒸汽发生器排污水钠离子浓度的高低。同时ATE再生时，最大化地去除油污以及适当地降低混床阴树脂再生时的碱耗量，使得ATE运行时，蒸汽发生器排污水中钠离子浓度满足WANO国际先进化学指标。 

Analysis and Improvement of the Increasing of Sodium Ion in Secondary Loop Caused by Condensate Polishing Plant in Nuclear Power Plants

The content of sodium ion in one steam generator blowdown system cannot satisfy the WANO chemical indices. This paper analyzes the possible causes of sodium ions in the secondary loop of the nuclear power plant and the difference of water quality indicators before and after the operation of the condensate polishing plant. It is concluded that the resin regeneration effect of the condensate polishing plant directly determines the sodium ion content in the steam generator sewage. With the ATE regeneration,? the removal of the oil contamination can be maximized and? the sodium hydroxide consumption during the regeneration of the anion resin of mixed bed can be reduced, and the sodium ion content in the steam generator sewage can satisfy the WANO chemical indices when the ATE is operating.