Researchers capture inception of hydrogen-uranium reaction for the first time

Key Points:

• Researchers at Lawrence Livermore National Laboratory (LLNL) have, for the first time, observed and characterized the initial stages of the chemically reactive interaction between hydrogen gas and uranium metal, which creates uranium hydride and leads to a runaway corrosion reaction.
• Using white-light interferometry, the team was able to non-invasively monitor the formation and growth of uranium hydride blisters on the metal surface in real time, revealing unexpected blister locations and lateral spreading patterns.
• This breakthrough provides crucial insights needed to develop predictive models for uranium degradation, which is vital for improving the safety and longevity of fusion reactors, hydrogen storage systems, and nuclear fuel storage.
• The study was conducted under limited temperature and pressure conditions, with plans to expand the research to a broader range of environments to enable comprehensive predictive capabilities.
• LLNL's success was attributed to both advanced experimental techniques and the preservation of institutional knowledge, highlighting the importance of long-term expertise in tackling complex materials science challenges.