Radiation chemistry of aqueous iodine systems under nuclear reactor accident conditions

Radiation-chemical behavior of cesium iodide solutions was investigated using a once-through flow system in relation to the behavior of radioactive iodine under the condition of nuclear reactor accidents. It was found that several factors such as initial concentration of CsI, pH and O2 concentration have a large influence on the oxidation-reduction reactions in the radiolysis of the iodide solutions. A pulse radiolysis technique was applied to this system to obtain clearer understanding of the radiolysis mechanism, and the rate constants were measured with the several important reactions involved. (author)