The Effects of hydrogen addition on the corrosive conditions of PWR primary coolant under irradiation, 9; Combind analysis of water radiolysis and ECP

Uchida, Shunsuke; Hata, Kuniki ; Hanawa, Satoshi ; Chimi, Yasuhiro; Sato, Tomonori  

A radiolysis and ECP combined code, WRAC-J, could obtain ECP calculation based on the empirical polarization curve. Newly developed WRAC-JAEA has consisted of (1) calculation of high temperature pH, (2) water radiolysis calculation, and (3) ECP calculation based on the anodic polarization curves of SS and Ni based alloys with involving oxide layer effects and the polarization curves of radilytic species, and then, it can calculate ECP based on plant operational conditions. By applying the WRAC-JAEA, radiolytic species concentrations are calculated based on plant operational conditions, radiation dose rate, pH, ECP is calculated based on the their concentrations direct effects of alkali metal ions, e.g., Li, and then, the corrosive conditions in BWRs and PWRs are evaluated.