Computer Program JN-METD3 to Deal with Neutron and gamma-Ray Transport in Multilayer Slabs by the J sub( N) Method

摘要

Mathematical formulae of the j sub( n) method are summarized for description of the neutron and gamma-ray transport in a multilayer slab system with anisotropic scattering in a multigroup model. A FORTRAN-IV computer program JN-METD3 is described in detail for solving the stationary transport problem within the context of j sub 7 approximation for space and P sub 3 approximation for scattering angle. The computer code calculates the radiation flux from an extraneous source at the slab boundary as a function of space, angle and energy variables. In addition, it evaluates the eigenvalue of the integral transport equation, the effective multiplication factor or the asymptotic decay constant of neutrons for a slab reactor, as well as the eigenfunction, the space, angle and energy dependent flux distribution. (Atomindex citation 12:586195)