论文部分内容阅读
TPFAP is a transmission probability fuel assembly code package for burn-up calculations on BWR and PWR. The transport calculation is started with a number of energy group calculations in the TPFAP nuclear data library by using of collision probability method. The method of calculating resonance shielding effects in TPFAP library is equivalence theory which uses the intermediate resonance approximations to derive an effective background scatter cross section sigma-p. The equivalence theory is limited by the available algorithms for determining the so-called ’equivalent’ sigma-p value in complex geometries.
TPFAP is a transmission probability fuel assembly code package for burn-up calculations on BWR and PWR. The transport calculation is started with a number of energy group calculations in the TPFAP nuclear data library by using a collision probability method. effects in TPFAP library is equivalence theory which uses the intermediate resonance approximations to derive an effective background scatter cross section sigma-p. The equivalence theory is limited by the available algorithms for determining the so-called ’equivalent’ sigma-p value in complex geometries .