The solubility of inert gases in liquid-metal heat-transfer agents

Shpilʹraĭn, Ė. Ė.; Skovorod’ko, S. N.; Mozgovoi, A. G.

doi:10.1007/bf02755996

Cited by 7 publications

(1 citation statement)

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“…For example, atmospheric He could diffuse into the melt if it were undersaturated with respect to the surrounding environment. As He has been shown to be more soluble than other atmospheric gases in liquid metals, − this scenario could result in the incorporation of fractionated air. However, it is common to cast uranium under vacuum, and therefore this mechanism seems implausible.…”

Section: Chronologymentioning

confidence: 99%

Application of the Uranium–Helium Chronometer to the Analysis of Nuclear Forensic Materials

Gates

Cassata

2016

Anal. Chem.

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Radiochronometers are used to constrain the manufacturing and processing history of actinide materials for nuclear forensic investigations. This paper describes U-He ages and He diffusion kinetics obtained from a metallic, highly enriched uranium sample. The average U-He age is 8% older than the known casting date, which indicates that excess He is present and is likely due to incomplete degassing of pre-existing He during the casting process. Although the U-He age is older than expected, the accuracy is comparable to other chronometers that have been applied to this material. Diffusion kinetics obtained from the uranium metal indicate that He is quantitatively retained under plausible storage conditions.

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