华龙一号核电机组主泵化学去污工艺研究

张鼎纹, 张冀兰, 于义军, 任科, 丁强, 史慧梅, 杨新辉, 王元伟, 张雪峰, 吴多东, 刘锋, 冯兴宇, 刘朋帅, 匡文军

Chemical Decontamination Process for Main Pump of Hualong One PWR

ZHANG Dingwen, ZHANG Jilan, YU Yijun, REN Ke, DING Qiang, SHI Huimei, YANG Xinhui, WANG Yuanwei, ZHANG Xuefeng, WU Duodong, LIU Feng, FENG Xingyu, LIU Pengshuai, KUANG Wenjun

表1 化学去污工艺及实施步骤

Table 1 The chemical decontamination process and implementation steps

Number Solution and implementation time Process steps (PS) 1 2.0% Citric acid + 0.1% Sodium Ascorbate, 24 h - 2 1.5% Citric acid + 0.5%DTPA + 0.1% Sodium Ascorbate, 24 h - 3 ①1.5%HNO3 + 1.5%KMnO4, 4 h ①→②→①→②→①→② ②1.5% Citric acid + 0.5%DTPA + 0.1% Sodium Ascorbate, 4 h 4 ①1.5% Citric acid + 0.5%DTPA + 0.1% Sodium Ascorbate, 4 h ①→②→①→②→① ②1.5%HNO3 + 1.5%KMnO4, 4 h 5 ①1.5% Citric acid +0.5%DTPA + 0.1% Sodium Ascorbate, 4 h ①→②→①→②→① ②1.5%NaOH + 1.5%KMnO4, 4 h 6 ①2.0% Citric acid + 0.1% Sodium Ascorbate, 4 h ①→②→①→②→① ②1.5%HNO3 + 1.5%KMnO4, 4 h