Abstract:
A computational program for in-core nuclear reactor fuel management was developed using two energy groups neutron diffusion theory in which neutrons are categorized into two energy level i.e. fast neutron energy group and thermal neutron energy group. A finite difference method and solving of linear equation using gauss-seidel were applied to calculate the diffusion equation in two dimension and Cartesian coordinate system. A criticality, neutron flux distribution and fuel burnup were calculated to compare advantage/disadvantages of three difference loading pattern i.e. 1. Uniform Loading, 2. Out-In loading and 3. In-Scatter loading. The group constant parameters were calculated using PIJ software to read and collapse a nuclear data from JENDL-3.3 database and generate nuclear macroscopic cross section, diffusion coefficient, and other parameters in which necessary to be used in diffusion equation. Two, four and seven groups constant were generated for this research. The calculation results showed that the best and adequate uniform power peaking distribution occurred when reactor core was In-Scatter loading pattern and was followed respectively by the Out-In loading and Uniform Loading