Journal
PROGRESS IN NUCLEAR ENERGY
Volume 105, Issue -, Pages 279-286Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pnucene.2018.02.003
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- ANDRA
- CEA
- CNRS
- ENS
- EDF
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The decommissioning of French gas-cooled nuclear reactors, all stopped since 1994, will generate 23,000 tons of nuclear waste containing C-14 among other radionuclides. This work aims at presenting and testing a selective extraction treatment of this radionuclide from graphite waste by carbon dioxide gasification.& para;& para;In previous works, we highlighted that graphite turns into a heterogeneously degraded carbon with neutron irradiation and C-14 could preferentially be concentrated in the most degraded zones. Moreover, these last react selectively with CO2 that would allow the C-14 extraction from graphite waste.& para;& para;The results on graphite waste are promising with the quarter of C-14 inventory extracted for a relative weight loss of few percent. Up to 68% of C-14 inventory was extracted, but with a more important mass consumption. Thus, the potential of this selective C-14 extraction would allow imagining alternative scenarios for graphite waste management.
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