Study of H2O2 Production and Consumption in γ-Irradiated Aqueous Systems in Contact with Zircalloy, Inconel, and AISI Alloys. An Electrochemical Approach.

Luca Gagliani; Christian Ekberg; Mats Jonsson

Study of H2O2 Production and Consumption in γ-Irradiated Aqueous Systems in Contact with Zircalloy, Inconel, and AISI Alloys. An Electrochemical Approach.
Paper in proceeding, 2025

_{This study investigates the steady-state concentration of radiolytic H2O2 produced by γ-radiolysis of water in contact with stainless steel, Inconel and Zircalloy materials. The findings reveal that the alloys lead to different hydrogen peroxide concentrations under γ-irradiation up to a total received dose of 2.2 MGy, with a maximum reduction of 40 % with respect to the control sample achieved by stainless steel and no tangible difference induced by Zircalloy. Without γ-irradiation, H2O2 reactivity is instead minimal and homogeneous toward all the alloys. No evidence of material oxidation was found on the surface of the irradiated samples. Further electrochemical investigations evidenced a shift of the Electrochemical Corrosion Potential (ECP) toward more positive values under γ-irradiation for both stainless steel and Zircalloy, with stainless steel showing a larger drift and higher current than Zircalloy. The results indicate that simple use of H2O2 solutions may not correctly mimic the effect of water radiolysis products and γ-irradiation on the alloys object of this study.}

Gamma Radiation

Radiolysis

Electrochemistry

Hydrogen Peroxide

Author

Luca Gagliani

Nuclear Chemistry and Industrial Materials Recycling

Royal Institute of Technology (KTH)

Other publications Research

Christian Ekberg

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Other publications Research

Mats Jonsson

Royal Institute of Technology (KTH)

The 23rd International Conference on Water Chemistry in Nuclear Reactor Systems

1279

The 23rd International Conference on Water Chemistry in Nuclear Reactor Systems
Busan, South Korea,

Subject Categories (SSIF 2025)

Materials Chemistry

Metallurgy and Metallic Materials

Driving Forces

Sustainable development

Areas of Advance

Energy

Infrastructure

Chalmers Materials Analysis Laboratory

More information

Created

8/20/2026

Study of H2O2 Production and Consumption in γ-Irradiated Aqueous Systems in Contact with Zircalloy, Inconel, and AISI Alloys. An Electrochemical Approach. Paper in proceeding, 2025