Production of H2 by water radiolysis in cement paste under electron irradiation: A joint experimental and theoretical study - Archive ouverte HAL Access content directly
Journal Articles Cement and Concrete Research Year : 2017

Production of H2 by water radiolysis in cement paste under electron irradiation: A joint experimental and theoretical study

(1) , (2, 3, 4) , (5) , (1) , (1, 3, 4) , (6, 7) , (6) , (8, 9) , (7) , (3, 10) , (3, 4, 5) , (3, 4) , (6) , (6) , (5)
1
2
3
4
5
6
7
8
9
10

Abstract

Long-term confinement of nuclear waste is one of the main challenges faced by the nuclear industry. Fission products such as 90 Sr and 137 Cs, both β − emitters known to induce serious health hazards, represent the largest fraction of nuclear waste. Cement is a good candidate to store them, provided it can resist the effects of irradiation over time. Here, we have investigated the effects of β − decay on cement by performing electron irradiation experiments on different samples. We show that H 2 production in cement, the main effect of water radiolysis, depends strongly on composition and relative humidity. First-principles calculations indicate that the water-rich interlayer regions with Ca 2+ ions act as electron traps that promote the formation of H 2. They also show that holes localize in water-rich regions in low Ca content samples and are then able to participate in H 2 production. This work provides new understanding of radiolysis effects in cements.

Dates and versions

cea-01543011 , version 1 (20-06-2017)

Identifiers

Cite

Sophie A Le Caër, Lucile A Dezerald, Khaoula A Boukari, Maxime A Lainé, Sébastien A Taupin, et al.. Production of H2 by water radiolysis in cement paste under electron irradiation: A joint experimental and theoretical study. Cement and Concrete Research, 2017, 100, pp.110 - 118. ⟨10.1016/j.cemconres.2017.05.022⟩. ⟨cea-01543011⟩
212 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More