Impact of Hydrogen Overpressure on Spent Fuel Alteration Behavior in Salt Brine During a Three-Year Long Corrosion Test
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Impact of Hydrogen Overpressure on Spent Fuel Alteration Behavior in Salt Brine During a Three-Year Long Corrosion Test Andreas Loida, Volker Metz, Bernhard Kienzler and Horst Geckeis Forschungszentrum Karlsruhe, Institut für Nukleare Entsorgung, P.O. Box 3640 D-76021 Karlsruhe, Germany, [email protected] ABSTRACT The corrosion of the Fe-based spent fuel containing canister produces large amounts of hydrogen, which dominate the composition of the gas phase. To quantify to what extent the hydrogen overpressure may counteract radiolysis enhanced matrix dissolution, related experimental work has been performed. High burnup spent fuel was corroded in 5 M NaCl solution in different tests: (1) Fe absence (
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