Hydrogen trapping: Synergetic effects of inorganic additives with cobalt sulfide absorbers and reactivity of cobalt polysulfide

Chartier, D.; Joussot-Dubien, C.; Pighini, Catherine; Sciora, E.; Bouyer, Frédéric

doi:10.1016/j.ijhydene.2012.07.003

Cited by 2 publications

(2 citation statements)

References 22 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of cobalt sulphide showed a significant impact on the swelling of bitumen by radiolysis [71]. Indeed, the literature [71][72][73][74][75][76][77] has highlighted the reduction in radiolytic hydrogen production induced by inorganic sulphides, particularly cobalt sulphide. Furthermore, experiments [71] showed that significant amounts of hydrogen can be trapped in amorphous cobalt oxysulfide at ambient temperature and under pressure ranging from 0.01 MPa to 0.4 MPa.…”

Section: Impact Of Saltsmentioning

confidence: 99%

“…At 0.5 moles of hydrogen per mole of starting solid, the maximum levels of hydrogen trapped are predicted to be higher than 0.13 MPa. In this respect, several investigations [72][73][74] aimed at clarifying the mechanisms that contribute to the trapping of dihydrogen during radiolysis. Indeed, authors [74] showed that the hydrogen absorber is a combination of partly crystalline Co(OH) 2 and amorphous CoS 2 with a molar ratio of 1 Co(OH) 2 /CoS 2 .…”

Section: Impact Of Saltsmentioning

confidence: 99%

See 1 more Smart Citation

Radiolysis of bituminized radioactive waste: a comprehensive review

Millot,

Houjeij,

Matta

et al. 2024

EPJ Nuclear Sci. Technol.

View full text Add to dashboard Cite

In the realm of radioactive waste management, the impact of radiolysis on bitumen and bituminized radioactive waste also called bituminized waste product (BWP) is considered one of the most significant factors influencing structural changes and the generation of radiolysis gas bubbles. This review provides a comprehensive overview of several studies that have explored the intricate interaction between radiation and various types of bitumen, to gain a better understanding of how such waste ages when exposed to radiation. While these studies provide insights into the diverse effects of radiolysis on bitumen, they also highlight numerous unanswered questions. The absence of gas bubbles does not necessarily indicate an absence of gas production, leaving further research to be undertaken. The complexities of bitumen radiolysis offer multiple avenues for future investigation, aiming to enhance our understanding and provide comprehensive solutions for bituminous radioactive waste management. Among the studied types of bitumen, blown R85/40 bitumen and straight-run distilled bitumen with a penetration grade of 70/100 stands out due to their widespread use in immobilizing co-precipitated radioactive sludges. These bituminous matrices play an essential role in understanding the broader implications of radiolysis within the context of bituminous waste management. This review underscores the significance of further research into radiolysis and bitumen ageing, emphasizing the need for a more in-depth exploration of these complex phenomena and their implications for the long-term safety and efficacy of repositories and disposal facilities.

show abstract