GANTRAS: A System of Codes for the Solution of the Multigroup Transport Equation with a Rigorous Treatment of Anisotropic Neutron Scattering. Plane and Spherical Geometry

摘要

A system of codes for neutron transport calculations in which the anisotropy of elastic and inelastic (including (n,n'x)-reactions) scattering is fully taken into account was developed. This is achieved by employing a rigorous method, so-called I*-method, to represent the scattering term of the transport equation and with the use of double-differential cross-sections for the description of the emission of secondary neutrons. The I*-method was incorporated into the conventional transport code ONETRAN. The ONETRAN subroutines were modified. An implementation of the updated version ANTRA1 was accomplished for plane and spherical geometry; ANTRA1 was included in GANTRAS and linked to modules which prepare angle-dependent transfer matrices.