Prediction of coupled heat and mass transfer in the Fast Reactor cover gas: the C-GAS code

Abstract

Pool designs of the Fast Reactor possess an inert cover gas above the hot pool's free surface. Sodium which evaporates from the hot pool is capable not only of condensing onto steel surfaces, but also of nucleating and forming small aerosol particles which interact strongly with thermal radiation. This paper describes the UK method for analysing these coupled heat and mass transfer processes in assessments of integrity of the roof structure and any components which traverse the gas blanket.