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An analytical approach to gamma-ray self-shielding effects for radioactive bodies encountered nuclear decommissioning scenarios

Research output: Contribution to journalJournal article

Published

Journal publication date2011
JournalApplied Radiation and Isotopes
Journal number10
Volume69
Number of pages11
Pages1521-1532
Original languageEnglish

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.