提高原子吸收光谱法测定电厂水汽系统中铁含量准确性的研究

摘要

In the nuclear power plant , high quality secondary loop feedwater provides a powerful guarantee for structural integrity of the steam generator tube .The Fe content in the secondary loop feedwater is about 5μg /L in general or even lower .Fe content in the feedwater is important in WANO indicators .Accurately measuring trace iron in the secondary loop water vapor and controlling its water quality optimization mean great to improving steam generator ’ s servicing life in nuclear power plant .Adopting atomic absorption spectrometry to determine iron content in the steam-water system of nuclear plant was described and optimization conditions for the measurement were proposed and well proved .%核电厂中二回路给水水质为蒸汽发生器传热管的结构完整性提供有力保证。二回路给水中铁含量很低，一般在5μg／L左右，甚至更低，而给水中铁的含量是WANO指标中重要的一项，因此准确测量二回路水汽中微量的铁，控制二回路水质优化，是提高核电厂蒸汽发生器使用寿命的重要手段之一。介绍了原子吸收光谱法用于电厂水汽系统铁含量的测定方法，提出了测定的优化条件，并得到良好效果。