Reactivity And Neutron Flux Distribution Studies In Multi Region Loaded Reactor Cores

Light water critical experiments have been performed in order to measure microscopic parameters and conversion ratios in single region and multi-region cores containing slightly enriched, stainless steel clad, UO2 fuel rods. The experimental results were analyzed with multi-group codes which were supplemented for the resonance energy by a Monte Carlo code. Experimental and analytical results are presented along with a description of experimental and analystical investigations performed in order to account for discrepancies between theory and experiment.