Storage of defective fuel pins in SFR core
Paper i proceeding, 2016

An open fuel pin failure is a breach in the fuel pin cladding that allows direct contact between the primary coolant and the nuclear fuel. In this paper we focus on the sodium-fuel interactions in a Sodium cooled Fast neutrons Reactor (SFR), reviewing the main aspects of the fuel pin failure evolution with an emphasis on the Reaction between the Oxide fuel and the Sodium (ROS). This reaction leads to the formation of an uranoplutonate phase with approximately half the density of the initial oxide. In turn this can cause significant fuel swelling and the potential further degradation of the fuel pin. The maximal fuel swelling due to the formation of the uranoplutonate can be estimated for non-irradiated fuel based on the physico-chemical properties of the pellets, as further described in this paper.

fuel pin failure

fuel swelling

sodium-fuel reaction


sodium fast reacors


Dan Tiberiu Costin

L. Desgranges

Teodora Retegan Vollmer

Chalmers, Kemi och kemiteknik, Energi och material

Christian Ekberg

Chalmers, Kemi och kemiteknik, Energi och material

Atalante 2016 International Conference on Nuclear Chemistry for Sustainable Fuel Cycles

1876-6196 (ISSN)

Vol. 21 378-385



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