核电站一回路退役技术研究

Study on Primary Decommissioning of Nuclear Power Plant

核电站一回路系统受到运行期间沉积的腐蚀产物的影响,造成放射性水平较高,但其主要为表面污染,采用化学去污方法可取得较好的效果。在核电站退役时,提前开展一回路去污工作,有助于后续退役操作。本文通过对国外核电站退役中一回路去污所采用的技术、实际案例进行介绍,对比了两种常用技术,并对我国将来核电站退役时一回路全系统去污提出了推荐的方法和建议。

The primary circuit system of nuclear power plant is contaminated by corrosion products deposited during operation.It’s mainly surface contamination,for which chemical decontamination can achieve a good result.During the decommissioning of nuclear power plants,it’s necessary to carry out primary decontamination in advance to facilitate subsequent decommissioning operations.This paper introduces the technologies and practical cases used for primary decontamination of nuclear power plant abroad and compares two common technologies.At last but not least,this paper also puts forward recommended methods and suggestions for primary decontamination of nuclear power plant in China in the future.