Preliminary Evaluation of Decontamination Agent and Ion Exchange Resin Requirements for System Decontamination of a Nuclear Power Plant

摘要

Generally, the oxide film formed on the surface of the structure materials in Light-Water-Reactor is a metal oxide such as iron, nickel and chromium. Iron and nickel in these metal oxides are removed in reduction process and chromium is removed in oxidation process. The amount of the oxidizing and reducing agent for effectively removing the oxide film through system decontamination depends on the properties of the oxide film. In this paper, the amount of decontamination agent required for WH 2-Loop PWR (KORI-1 unit) system decontamination using permanganic acid as the oxidizing agent and oxalic acid as the reducing agent, and ion exchange resin required to finally remove dissolved metal ions and decontamination agent were preliminarily evaluated.