Experimental Decontamination of a Reactor-Water Clean-Up Line at the Dodewaard Nuclear Power Plant by Means of the LOMI (Low Oxidation-State Metal Ion) Process

摘要

An experimental decontamination of a line of the reactor-water clean-up (RWCU) system at the Dodewaard BWR was carried out. A special decontamination unit, including a rack for chemical measurements and a tree with different materials and shapes, was designed and constructed for this purpose. The RWCU line was divided into two pieces before decontamination; each part was decontaminated twice in order to investigate the reproducibility of the results. A linear correlation was found between activity and concentration of dissolved metals in the decontamination solution. After decontamination, several pieces of the RWCU line were examined at the laboratory. No corrosion attack of the stainless steel was found. The various material samples in the tree showed no sign of attack after three decontamination treatments.