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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/8741

Title: Accumulation of plutonium in mammalian wildlife tissues following dispersal by accidental-release tests
Authors: Johansen, MP
Child, DP
Caffrey, EA
Harrison, JJ
Hotchkis, MAC
Payne, TE
Ikeda-Ohno, A
Thiruvoth, S
Beresford, NA
Twining, JR
Keywords: Plutonium
Liver
Particles
Skeleton
Partition
Gastrointestinal tract
Issue Date: 1-Jan-2016
Publisher: Elsevier
Citation: Johansen, M., Child, D., Davis, E., Hotchkis, M., Ikeda-Ohno, A., Payne, T., & Twining, J. R. (2016). Accumulation of plutonium in mammalian wildlife tissues following dispersal by accidental-release tests. Journal of Environmental Radioactivity, 151, 387-394. doi: http://dx.doi.org/10.1016/j.jenvrad.2015.03.031
Johansen, M., Child, D., Davis, E., Hotchkis, M., Ikeda-Ohno, A., Payne, T., & Twining, J. R. (7-12 September, 2014). Accumulation of plutonium in mammalian wildlife tissues: comparison of recent data with ICRP distribution models. Paper presented at the International Conference on Radioecology and Environmental Radioactivity, Barcelona, Spain.
Abstract: We examined the distribution of plutonium (Pu) in the tissues of mammalian wildlife inhabiting the relatively undisturbed, semi-arid former Taranaki weapons test site, Maralinga, Australia. The accumulation of absorbed Pu was highest in the skeleton (83% ± 6%), followed by muscle (10% ± 9%), liver (6% ± 6%), kidneys (0.6% ± 0.4%), and blood (0.2%). Pu activity concentrations in lung tissues were elevated relative to the body average. Foetal transfer was higher in the wildlife data than in previous laboratory studies. The amount of Pu in the gastrointestinal tract was highly elevated relative to that absorbed within the body, potentially increasing transfer of Pu to wildlife and human consumers that may ingest gastrointestinal tract organs. The Pu distribution in the Maralinga mammalian wildlife generally aligns with previous studies related to environmental exposure (e.g. Pu in humans from worldwide fallout), but contrasts with the partitioning models that have traditionally been used for human worker-protection purposes (approximately equal deposition in bone and liver) which appear to under-predict the skeletal accumulation in environmental exposure conditions. © 2015, Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.jenvrad.2015.03.031
http://apo.ansto.gov.au/dspace/handle/10238/8741
ISSN: 0265-931X
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