Accession Number : AD0600986

Title :   MODIFIED P2 APPROXIMATIONS TO THE NEUTRON TRANSPORT EQUATION.

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C

Personal Author(s) : Dawson,Charles

Report Date : APR 1964

Pagination or Media Count : 23

Abstract : The steady-state neutron transport equation for slab geometry is expanded in Legendre polynomials. The expansion is truncated after the third term (P sub 2 equations) and then is modified in an attempt to reduce the truncation error. The resulting equations are, for many problems, a better approximation to the neutron transport equation than the P sub 2 equations or the standard diffusion equations. The method is extended to two and three dimensions by a simplified form of the spherical expansion to the neutron transport equation. Sample results are given. (Author)

Descriptors :   (*NEUTRON TRANSPORT THEORY, EQUATIONS), (*DIFFUSION, THEORY), REACTOR MODERATORS, GEOMETRIC FORMS, NEUTRON FLUX, POLYNOMIALS, HARMONIC ANALYSIS, INTEGRAL EQUATIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE