Abstract
Reduction of radiation exposure is one of the most important subjects of light water reactor (LWR) plants as well as improvements of reliability and availability. Several methods, for supressing corrosion and deposition of radioactive ions, have been proposed and applied to some actual plants. The following recent studies of the pre-filming technique for LWR materials are presented in this paper. (1) Zinc and Aluminum ion injection methods. (2) Oxidation treatment in high temperature dissolved oxygen controlled water. (3) Palladium coating treatment. (4) Pre-oxidation treatment by RCT method. (5) Pre-oxidation treatment in air or steam atmosphere. (6) Pre-oxidation treatments in low-oxygen potential atmosphere.
