红沿河核电站凝结水精处理系统的启动与运行

摘要

The condensate polishing treatment system (ATE) and its good operating condition are vital to the operation security of nuclear power plants.Take the ATE system of the Unit 3 and 4 of Hongyanhe Nuclear Power Plant as the study case,the authors compare the ATE effluent concentration and water production under the scenario of the first-time start-up versus the normal start-up,then present the complete separation method using mixed bed resin,and put forward the major control processes of resin regeneration.Problems which occurred during commissioning are also analyzed and corresponding preventative measures are provided.After commissioning,the ATE systems of Hongyanhe Nuclear Power Plant Units 3 and 4 have been maintained in good operating condition.The ATE effluent hydrogen conductivity,Na+ mass concentration and SiO2 mass concentration are respectively 0.08 μs/cm,0.10 μg/L and 1.91 μg/L.And the water volume of cation bed and mixed bed are 1.2×1O5 tons and 4.4×105 tons respectively.The resin separation and regeneration performance is satisfactory with the volume fraction of the anion resin in the cation resin layer less than 0.08％ and the volume fraction of the cationic resin in the anion resin layer less than 0.07％.During the operation process of ATE system,the concentrations of Na+,Cl-and SO42-in the steam generator sewage water have all met the requirements in the water chemistry specifications.%凝结水精处理系统(ATE)及其良好运行状态对核电站安全运行至关重要.以红沿河核电站3、4号机组ATE系统为例,对比机组首次启动和正常启动2种工况下ATE出水水质和制水量;介绍混床树脂完全分离的方法,给出树脂再生的重要控制点;对调试期间所遇问题进行分析,给出防范措施.经调试,红沿河核电站3、4号机组ATE运行良好,出水氢电导率、Na+质量浓度和SiO2质量浓度分别为0.08μS/cm、0.10μg/L和1.91μg/L,阳床和混床制水量分别为1.2×105 t和4.4×105 t;树脂分离和再生的效果良好,阴树脂在阳树脂层内的体积分数小于0.08％,阳树脂在阴树脂层内的体积分数小于0.07％;ATE运行期间,蒸汽发生器排污水中Na+、Cl-和SO2-的浓度符合水化学规范.