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The Fate of Radiogenic Iodine During the Electrochemical Treatment of Spent EBR-II Fuel

Published online by Cambridge University Press:  01 February 2011

Steven Frank
Affiliation:
steven.frank@inl.gov
DeeEarl Vaden
Affiliation:
DeeEarl.vaden@inl.gov, Idaho National Laboratory, Pyroprocessing Technology, Idaho Falls, Idaho, United States
Brian R Westphal
Affiliation:
brain.westphal@inl.gov, Idaho National Laboratory, Pyroprocessing Technology, Idaho Falls, Idaho, United States
Thomas A Johnson
Affiliation:
thomas.johnson@inl.gov, Idaho National Laboratory, Pyroprocessing Technology, Idaho Falls, Idaho, United States
Paula A Hahn
Affiliation:
paula.hahn@inl.gov, Idaho National Laboratory, Pyroprocessing Technology, Idaho Falls, Idaho, United States
Jeff J. Giglio
Affiliation:
jeffrey.giglio@inl.gov, Idaho National Laboratory, Analytical Laboratory, Idaho Falls, Idaho, United States
Daniel G. Cummings
Affiliation:
daniel.cummings@inl.gov, Idaho National Laboratory, Analytical Laboratory, Idaho Falls, Idaho, United States
Michael Rodriquez
Affiliation:
michael.rodriquez@inl.gov, Idaho National Laboratory, Analytical Laboratory, Idaho Falls, Idaho, United States
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Abstract

Radiogenic iodine is one of the more difficult fission products to capture and immobilize during the reprocessing of spent nuclear fuel.

However, for metallic fuels reprocessed by electrometallurgical treatment, it is believed that the majority of fission-product iodine is retained during the various processing steps. Spent fuel from the Experimental Breeder Reactor II (EBR-II) at the Idaho National Laboratory (INL) is being treated by a combination of electrochemical and pyrometallurgical methods to deactivate the bond sodium of the fuel, recover uranium, and immobilize fission products for disposal. This paper discusses the progress of various strategies and experiments to confirm the expected retention of iodine during the electrometallurgical treatment of EBR-II spent fuel. This includes surveys of previous observations and measurements, and the direct measurement of iodine from various process samples. Current measurements are aimed at iodine determination in the bond sodium and plenum regions of the fuel, refined iodine measurements in electrorefiner salt, and the retention of iodine during waste form production.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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