THE MONTE CARLO FLUKA SIMULATION OF GAMMA-RAY AND NEUTRON ATTENUATION CHARACTERISTICS OF REFRACTORY HIGH ENTROPY ALLOYS

In this work, the g-ray and thermal neutron shielding properties of high entropy alloys in formula Wx(TaVZr)100-x, where (x = 5, 10, 15, 20 and 25%wt) have been studied. The mass attenuation coefficients (µm) for g-ray of these high entropy alloys have been obtained at energy range 59.6-1332 keV using Phy-X software and FLUKA Monte Carlo code simulation. The obtained results are found to be in good agreement. The W25 for high entropy alloys sample showed the highest µm value and the lowest HVL, MFP and transmission factor compared with the other ones in these high entropy alloys samples. As for the case of thermal neutron shielding properties, the FLUKA Monte Carlo code was used for simulated. It was found that W5 high entropy alloy sample shown the highest mass attenuation coefficients (µm) value. These results indicated that the high entropy alloys sample, with high W content possesses excellent g-ray shielding properties, while alloys with low W content possesses superb thermal neutron shielding.