Validation of BATAN's standard diffusion codes on IAEA benchmark static calculation

Extensive benchmark calculations using the combination of BATAN's standard diffusion code and WIMS/D4 have been conducted to check the validity and accuracy of the codes, and to obtain proper cell modeling for MTR type fuel and control elements which will be used in designing the next high loading silicide fuel of RSG-GAS. The benchmark object and parameters to be calculated are defined by the IAEA in the IAEA-TECDOC-233 and IAEA-TECDOC-643. In general, the combination of BATAN's standard diffusion code, BATAN-2DIFF, and WIMS/D4 gave very satisfactory results which proved the validity of the proposed WIMS/D4 cell model and the accuracy of the BATAN's diffusion code used in the benchmark calculations. Four-energy-group, multi plate options of WIMS/D4 were sufficient to give accurate results in term of infinite multiplication factors, fuel depletion results and diffusion constants for whole core calculations. Two-dimensional, four-group diffusion model supplied with a correct axial buckling value can be considered accurate enough for the MTR whole core calculations. (author) 10 refs, 7 tabs, 6 figs