Studies on reproducibility and simulation of radiolysis of seawater with simple aqueous solutions

Nagaishi, Ryuji ; Ito, Tatsuya  ; Kuwano, Ryo*; Godo, Masao*; Yoshida, Yoichi*

Since seawater has been used as emergency cooling water in the 1F accident, 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 absorption of radical products was observed using pulse radiolysis, and the molecular products hydrogen 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 halides was compared with (natural) seawater.