Reactions of Nickel Ions in Water Radiolysis up to 300 °C.

Radiation chemistry of hydrated metal ions plays a significant role in the field of nuclear energy, especially regarding water radiolysis in coolant water in nuclear reactors. This work reports new experimental data on the reactivity of Ni species under critical conditions of temperature and pressure. The reaction rates of hydrated nickel ions with water radiolysis products (e, OH, H, and HO) have been investigated for a 25-300 °C temperature range and 200 bar pressure using electron pulse radiolysis/transient absorption.

Reactivity of Zn in high-temperature water radiolysis.

Reactivity of transients involving Zn in high-temperature water radiolysis has been studied in the temperature range of 25-300 °C. The reduced monovalent zinc species were generated from an electron transfer process between the hydrated electron and Zn ions using pulse radiolysis. The Zn species can subsequently be oxidized by the radiolytically-produced oxidizing species: ˙OH, HO and ˙H.