OZMA: A Code to Calculate Resonance Reaction Rates in Reactor Lattices Using Resonance Profile Tabulations

摘要

The OZMA code solves the neutron transport equation for a reactor lattice unit cell at energies which lie in the resolved resonance regions of the lattice nuclides. Spherical, slab, cylindrical, square and hexagonal geometries can be handled. The code does not make direct use of resonance parameters, but is based on preprocessing these into Doppler broadened cross section tables of high accuracy and sufficient detail to follow the resonance shapes throughout the resolved resonance region. From these tables the cross sections of the nuclide mixtures contained in the different subregions of the lattice unit cell can be readily derived at all energies needed for the resonance calculations with the same accuracy as that attained in the library processing programs. The current report provides a complete description of the OZMA code itself, the input instructions, sample input and details of the output.