title: An analytical approach to γ-ray self-shielding effects for radioactive bodies encountered nuclear decommissioning scenarios.
abstract: A novel analytical approach is described that accounts for self-shielding of γ radiation in decommissioning scenarios. The approach is developed with plutonium-239, cobalt-60 and caesium-137 as examples; stainless steel and concrete have been chosen as the media for cobalt-60 and caesium-137, respectively. The analytical methods have been compared MCNPX 2.6.0 simulations. A simple, linear correction factor relates the analytical results and the simulated estimates. This has the potential to greatly simplify the estimation of self-shielding effects in decommissioning activities.
authors: Engineering Department, Lancaster University, Lancaster LA1 4YR, UK. kelumgamage@gmail.com
authors: K A A
authors: KA
authors: Gamage
authors: M J
authors: MJ
authors: Joyce
mesh_terms: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D003198:Computer Simulation; D003252:Construction Materials; D003666:Decontamination / Q000379:methods*; D005720:Gamma Rays; D006801:Humans; D009010:Monte Carlo Method; D011005:Plutonium; D011835:Radiation Protection / Q000379:methods*; D018788:Radioactive Hazard Release
chemical_list: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D011005:Plutonium