Effect of Fuel Particles Distribution Model on PBR Cell Parameters

摘要

One of the challenges in Pebble Bed Reactor (PBR)core analysis is the adequate representation of the doubleheterogeneityin the geometry, both at the fuel particlesand the pebbles distribution levels. Most of the modelsused so far represent the distribution of the fuel grainswithin the pebble or of the pebbles within the core, whichare intrinsically random, as a regular lattice distribution.Recently, special interest has been shown toward theevaluation of the effect of packing randomness at eitherheterogeneity level. This direction of investigation is alsothe subject of the work presented here.