Affordable Access

Publisher Website

Modelling the release behaviour of cesium during severe fuel degradation

Journal of Nuclear Materials
Publication Date
DOI: 10.1016/0022-3115(95)00130-1


Abstract An analytical model has been developed to describe the diffusional release of fission product cesium from Zircaloy-clad fuel under high temperature reactor accident conditions. The model is based on the analysis of recent annealing experiments performed at the Chalk River Laboratories in steam. The present treatment accounts for the influence of the atmosphere (i.e., changing oxygen potential) on the state of fuel oxidation and the release kinetics. The effects of fuel dissolution on the volatile release behaviour (under reducing conditions) is considered in terms of earlier crucible experiments and a simple model based on bubble coalescence and transport in metal pools. This model has also been used to interpret the cesium release kinetics observed in steam and hydrogen experiments at the Vertical Irradiation NO Facility in the Oak Ridge National Laboratory and at the HEVA/VERCORS Facility in the Commissariat à l'Energie Atomique.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Modelling of particle movement and thermal behavio...

on Surface and Coatings Technolog... Jan 01, 1994

On the behaviour of cesium and iodine in light wat...

on Journal of Nuclear Materials Jan 01, 1981

Observations on the release of cesium from UO2fuel

on Journal of Nuclear Materials Jan 01, 1996

Thermochemical data and modelling for ex-vessel co...

on Journal of Nuclear Materials Jan 01, 2001
More articles like this..