Fabrication of irradiation capsule for IASCC irradiation tests, 3; Irradiation capsule for ECP sensor (Joint research)

Ide, Hiroshi  ; Izumo, Hironobu; Ishida, Takuya; Saito, Takashi; Hanawa, Satoshi ; Matsui, Yoshinori ; Iwamatsu, Shigemi; Kanazawa, Yoshiharu; Miwa, Yukio; Kaji, Yoshiyuki  ; Tsukada, Takashi ; Ishitsuka, Etsuo   ; Kawamura, Hiroshi

Dissolved oxygen ions and chlorine ions concentration have been used as an evaluation index of stress corrosion cracking behavior for the light water reactor materials. In addition to these parameters, Electrochemical Corrosion Potential (ECP) was commonly used as the evaluation. Therefore, as a part of the IASCC irradiation tests, the irradiation test of the iron oxide type and the platinum type of ECP sensor were carried out under the BWR coolant condition. As a result, some measurements of ECP sensor succeed. However, it was clear that the improvement of ECP sensor is necessary. In this report, developed irradiation capsule ECP sensor is reported.