Investigation of Gamma Ray Photons Buildup in Uranium Dioxide using G-P Fitting Approximation

The study aims at investigation of buildup factor data for widely used fuel element UO
2
inside the nuclear reactors. The five parameter G-P fitting approximation is employed for computation of buildup factors in the incident energy ranging from 0.015MeV to 15 MeV up to 40 mean free paths (mfp’s). The data results so obtained are investigated as a function of photon energy and the penetration depth. Remarkably, double- and triple-peaked structures of exposure and energy absorption buildup factors with photon energy are seen. Wherever possible, the calculated results are compared with the available MCNP codes.