Critical Experiments with Concrete-Reflected Fast Test Reactor Fuel Pins in Water

Abstract

Criticality benchmark-type data are obtained on four undermoderated FTR (Fast Test Reactor) fuel pin-water lattices with concrete reflection. The experiments were designed to serve as benchmarks for validating computer codes and nuclear data used in calculations of mixed plutonium and uranium systems. These particular experiments provide measurement data on concrete reflectors that can be used for checking not only ''concrete cross sections''but also the computer modeling of systems involving concrete reflectors. 1 ref.