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Updated: May 31, 2026

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Published on: December 14, 2017
An analytical approach to γ-ray self-shielding effects for radioactive bodies encountered nuclear decommissioning
1Engineering Department, Lancaster University, Lancaster LA1 4YR, UK. kelumgamage@gmail.com
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.
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