PAR Elevation Influence on Hydrogen Floor Layer Depth

Abstract

In order to circumvent problems associated with containment loads resulting from a possible hydrogen combustion, French containments for instance are equipped with passive autocatalytic recombiners (PAR). The aim of this safety device is to recombine hydrogen with oxygen in order to limit hydrogen concentration. Hence, PAR distribu- tion within the containment is a key feature to limit the hydrogen risk. According with the PARIS benchmark scenario and boundary conditions therein (EU-FP6, SARNET project) a floor layer developed with low mass and thermal mixing processes. In this paper we illustrate the link between the PAR elevation and the floor layer depth.