Radiation-Induced Redox Reactions of Iodine Species in Aqueous Solution

摘要

This report describes an investigation into the unstable valency states of iodine in aqueous solutions using the technique of pulse radiolysis. Spectra have been measured for each of the intermediates (Isup(II), Isup(IV), Isup(VI) and Isup(VIII)), and their rates of decay determined as a function of pH etc. These data have been used to elucidate the nature of the intermediates, and the mechanisms of their production and decay. The disappearance kinetics of hypoiodous acid have also been investigated. The results are used to develop a mechanism for the interconversion of iodide and iodate, and their implications for the assessment of iodine release in PWR design basis faults are discussed. (ERA citation 11:013840)