[G15-19] 放射線化学

[G19] Study of H2O2 and O2 concentration behavior as a function of H2 injection in PWR

^〇Phantira Lertnaisat¹, Yosuke Katsumura¹, Satou Mukai², Ryuji Umehara³, Yuichi Shimizu³, Masaru Suzuki² (1.The University of Tokyo, 2.NDC, 3.MHI)

Keywords:PWR, Hydrogen Water Chemistry, Computer Simulation

At present, 25-40cc H₂/kg H₂O (STP) is injected to the primary coolant of PWRs to inhibit the production of oxidizing species. Recent studies reveal that, at high temperature, less amount of additional hydrogen is required, and excess hydrogen injection may leads to different type of corrosion due to reductive environment. By using computer simulation, the required concentration of additional hydrogen and the concentration of oxidizing species; H₂O₂ and O₂, at high temperature were evaluated based on available data