压水堆一回路冷却剂活化腐蚀产物钴银锑

Major Activated Corrosion Products Cobalt,Silver and Antimony in the Primary Coolant of PWR Power Plants

介绍了压水堆核电厂一回路冷却剂中主要活化腐蚀产物钴、银、锑源项的产生和对于停堆机组剂量大幅增加的影响。研究这些核素在反应堆运行和停堆期间的行为并尽早探知这些污染物的出现,以便确定相应的解决办法。它包括:从源头做起,与一回路冷却剂系统接触的设备和部件尽量不采用含有钴、银、锑的材料;制定严格的水化学和停堆程序,使得对这些核素污染的净化能力最佳化和对过度污染最小化;根据具体情况改进净化工艺,限制污染带来的影响。实践证明,这些措施对减少或限制钴、银、锑的污染是行之有效的。

The production of the major activated corrosion products such as mony in the primary coolant of PWR power plants and the impacts on the increase by these corrosion products during the shutdown are described in the paper. cobalt, silver and anti- of the dose rates caused Investigating the corrosion product behavior during the operation and shutdown periods aims at detec- ting the appearance of these radiological pollutants in the early time and searching relevant solutions that may enable eventually to decrease the dose rate. The solutions may include： --Replacing critical material in the primary system＇s with primary coolant circuit to possibly limit the source term; equipments and components, which contact -- Elaborating strictly the specific chemical and shutdown procedure to optimize the purification ca- pacity and to minimize the over-contaminations; -- Improving purification techniques according to the real operation circumstance, and limiting the im- pacts of these pollutants. It is obvious in the re limit the pollutants species al practices that implementing appropriate solution will be benefit to decrease or like cobalt, silver and antimony.