The Effects of hydrogen addition on the corrosive conditions of PWR primary coolant under irradiation, 10; Effects of boiling on combined analysis of water radiolysis and ECP

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

A radiolysis and ECP combined code, WRAC-JAEA, has been originally developed for analysis of ECP experiments in the JMTR in-pile loop. It was confirmed that the code could be applied for neutral water conditions of BWRs to high pH water conditions of PWRs. The effects of boiling in BWRs on the analytical results were significantly large, while those of subcooled boiling in PWRs should be also considered. Radiolytic species transfer from liquid phase to gas phase in the coolant flow along the fuel was analyzed. As the results, it was confirmed that the combined code could be applied under subcooled boiling conditions as well as boiling conditions, and then, applicable for analysis of corrosive conditions in the nuclear power plants as well as in-pile loops.