[3E13-14] Radiolysis

[3E14] Studies on Reproducibility and Simulation of Radiolysis of Seawater with Simple Aqueous Solutions

*Ryuji Nagaishi^1,2, Tatsuya Ito¹, Ryo Kuwano¹, Masao Gohdo², Yoichi Yoshida² (1. JAEA, 2. Osaka Univ.)

Keywords:Seawater, Radiolysis, Reproducibility, Transient Absorption Measurement, Final Product Analysis

Since seawater was used as emergency cooling water in the 1F accident, hydrogen gas and corrosive substances were generated differently from those in pure water, knowledge about radiolysis of seawater became important after the accident. In the experimental studies, simulated seawater and aqueous solutions containing halides have been used instead of seawater to elucidate individual events and phenomena and to obtain data. However, it has not been quantitatively clarified whether the radiolysis of seawater is reproduced as a whole. Therefore, in this study, in order to clarify the reproducibility from the initial process of radiolysis to the formation and reaction processes of final products, the transient absorptions of radical products were observed using a pulse radiolysis technique, and the molecular products of hydrogen gas and hydrogen peroxide were measured by final product analysis. Based on these experimental results on the radiolysis of seawater, simulated seawater or an aqueous solution containing a halide was compared with (natural) seawater.