A Semiempirical Formula for Differential Dose Albedo for Gamma Rays on Concrete

PANTHERE: simulation software for 3D dose rate calculation in complex nuclear facilities

“…For instance, in a closed room, reflection by walls, roof and floor can significantly contribute to the dose rate, and has to be estimated using another method or code like Chilton-Huddleston albedo method [6] or Monte-Carlo code TRIPOLI-4®.…”

Methods for Calculating Effects of Ducts, Access Ways, and Holes in Radiation Shields

“…Chapman 24 extended the LeDoux-Chilton approach to include double reflections and second-order effects such as a wall backscatter followed by a corner-lip inscatter. In place of the total albedos with the assumption of isotropy of the reflected radiation used by LeDoux and Chilton, Chapman substituted the semiempirical formula for the differential dose albedo that was derived by Chilton and Huddleston 25 (see Section 5.1.5). The two parameters in this formula were determined by a least-squares fit to the Monte Carlo data of Raso.…”

“…26 Song derived a semiempirical formula for use in the calculations in terms of a singleenergy parameter for the differential neutron dose albedo in a manner analogous to that used by Chilton and Huddleston 25 in their gamma-ray calculations. Values for the energy-dependent parameter were obtained by a least-squares analysis that gave the best fit to the data of Allen et al Monte Carlo Methods for Rectangular Ducts.…”

Calculations of Thermal-Neutron Flux Distributions in Concrete-Walled Ducts Using an Albedo Model With Monte Carlo Techniques

“…4 ConseQuently, initial radiations are significant only for small weapons or for high blast ~evels around large weapons. Since there appears to be little incentive for a prospective enemy to use small weapons either against the general public {because large area coverage would be reQuired) or against hardened military installations (because high blast levels would be neededh a primary area of concern, insofar as ini tia.l radiation dose protection is concerned, is for large weapons and heavily shielded structures, such as missile bases or military command posts.…”