Instant release of fission products in leaching experiments with high burn-up nuclear fuels in the framework of the Euratom project FIRST- Nuclides

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• 作者：K. Lemmens^a ; ^{klemmens@sckcen.be} ; E. Gonzá ; lez-Robles^b ; B. Kienzler^b ; E. Curti^c ; D. Serrano-Purroy^d ; R. Sureda^e ; A. Martí ; nez-Torrents^e ; O. Roth^f ; E. Slonszki^g ; T. Mennecart^a ; I. Gü ; nther-Leopold^c ; Z. Hó ; zer^g
• 关键词：Spent nuclear fuel ; Static leaching ; Instant release fraction ; FIRST-Nuclides
• 刊名：Journal of Nuclear Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：484
• 期：Complete
• 页码：307-323
• 全文大小：4327 K
• 卷排序：484

文摘

Leach tests were performed to study the instant release of fission products from high burn-up UO2 fuels and one MOX fuel. In these tests, the fission gas release given by the operator was a pessimistic estimator of the iodine and cesium release. Iodine and cesium release is proportional to linear power rating beyond 200 W cm−1. Closure of the fuel-cladding gap at high burn-up slows down the release. The release rate decreases following an exponential equation.