Investigation of fission product interaction with the SiC containment layer of high burnup TRISO fuel particles

Rachel L. Seibert, Chad M. Parish, Kurt Terrani, Jeff Terry

Research output: Contribution to journalConference articlepeer-review

Abstract

This work aims to understand the interaction of fission products with the SiC containment layer in TRISO particles. We have systematically examined three SiC shells from irradiated TRISO particles using XAFS, TEM, and EDS. Results indicate the formation of palladium silicides, and uranium and plutonium carbides. Additionally, silver is seen to be metallic. Preliminary microscopy results indicate fission products throughout the SiC layer of the TRISO particles, and microstructural changes have been observed between the as-irradiated and safety tested particles. These results have provided key information on the fission product transport behavior through irradiated SiC at varying temperatures. Knowledge of these reaction pathways will allow for better simulation of the long-term behavior of TRISO fuels. They may also suggest ways to modify the SiC layer to improve fuel performance and mitigate fission product release, which is critical for safety strategies required to commercialize these nuclear fuel technologies.

Original languageEnglish
Pages (from-to)1260-1261
Number of pages2
JournalTransactions of the American Nuclear Society
Volume114
Issue number1
StatePublished - 2016
Event2016 Transactions of the American Nuclear Society Annual Meeting, ANS 2016 - New Orleans, United States
Duration: Jun 12 2016Jun 16 2016

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