14C selective extraction from French graphite nuclear waste by CO2 gasification

摘要: Abstract The decommissioning of French gas-cooled nuclear reactors, all stopped since 1994, will generate 23,000 tons waste containing 14C among other radionuclides. This work aims at presenting and testing a selective extraction treatment this radionuclide from graphite by carbon dioxide gasification. In previous works, we highlighted that turns into heterogeneously degraded with neutron irradiation could preferentially be concentrated in the most zones. Moreover, these last react selectively CO2 would allow waste. results on are promising quarter inventory extracted for relative weight loss few percent. Up to 68% was extracted, but more important mass consumption. Thus, potential imagining alternative scenarios management.