Molybdenum release from high burnup spent nuclear fuel at alkaline and hyperalkaline pH
Nuclear Engineering and Technology(2024)
摘要
This work presents experimental data and modelling of the release of Mo from high-burnup spent nuclear fuel (63 MWd/kgU) at two different pH values, 8.4 and 13.2 in air. The release of Mo from SF to the solution is around two orders of magnitude higher at pH = 13.2 than at pH = 8.4. The high Mo release at high pH would indicate that Mo would not be congruently released with uranium and would have an important contribution to the Instant Release Fraction, with a value of 5.3%.
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关键词
Spent nuclear fuel,Molybdenum,Metallic inclusions,Hyperalkaline conditions,Instant release fraction,X-ray photoelectron spectroscopy
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