Springer Iranian Journal of Science and Technology (Sciences) 1028-6276 Articles in Press 2017 01 25 Computation of neutron dose buildup factors for ordinary concrete in the fast range of energy: A comparative study 3950 10.22099/ijsts.2017.3950 EN Danial Salehi Department of radiological and Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran Dariush Sardari Department of Radiological and Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. Milad S Jozani Faculty of Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran. Journal Article 2015 08 19 In this work we calculated neutron dose buildup factor at energy interval 80-120 MeV for the calcareous type of ordinary concrete (i.e., one made of sand and aggregate composed basically of limestone) by using the data from the literature and an improved empirical fitting formula for estimating neutron buildup factors. We could estimate the removal macroscopic cross section of neutron (ƩR) in this range of energy (80-120 MeV) at various mass thicknesses (0˂X˂550) for this type of concrete. The results are compared with the Monte Carlo method.