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|Title:||Corrosion of High Burn-up Structured UO2 Fuel in Presence of Dissolved H2|
|Authors:||FORS Patrick; CARBOL Paul; VAN WINCKEL Stefaan; SPAHIU K.|
|Citation:||JOURNAL OF NUCLEAR MATERIALS vol. 394 p. 1-8|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in Journals|
|Abstract:||The influence of high burn-up structured material on UO2 corrosion has been studied in an autoclave experiment. The experiment was conducted on spent fuel fragments with an average burn-up of 67 GWd/tHM. They were corroded in a simplified groundwater containing 33 mM dissolved H2 for 502 days. All redox sensitive elements were reduced. The reduction continued until a steady-state concentration was reached in the leachate for U at 1.5 1010 Mand for Pu at 7 1011 M. The instant release of Cs during the first 7 days was determined to 3.4% of the total inventory. However, the Cs release stopped after release of 3.5%. It was shown that the high burn-up structure did not enhance fuel corrosion.|
|JRC Institute:||Institute for Transuranium Elements|
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