Three-dimensional neutronics analysis for the LIBRA-SP light ion fusion power reactor

Three-dimensional (3-D) neutron-gamma transport calculations have been perf ormed for the LIBRA-SP chamber with detailed geometrical modeling and resul ts were compared to results based on one-dimensional (1-D) calculations. Th e overall tritium breeding ratio is 1.396. This is only 3% lower than the v alue predicted from the 1-D results. The overall reactor energy multiplicat ion is 1.157 which is only 2% lower than the value estimated from the 1-D c alculations. Larger differences were observed in the local heating and dama ge results obtained from the 1-D and 3-D calculations.