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Spatial distribution of 241Am, 137Cs, 238Pu, 239,240Pu and 241Pu over 17 year periods in the Ravenglass saltmarsh, Cumbria, UK

Oh, J.-S., Warwick, P.E. and Croudace, I.W. (2009) Spatial distribution of 241Am, 137Cs, 238Pu, 239,240Pu and 241Pu over 17 year periods in the Ravenglass saltmarsh, Cumbria, UK Applied Radiation and Isotopes, 67, (7-8), pp. 1484-1492. (doi:10.1016/j.apradiso.2009.02.048).

Record type: Article

Abstract

Ninety five surface scrape samples were collected at the Ravenglass saltmarsh and analysed for radionuclides by alpha spectrometry (238Pu and 239,240Pu), gamma spectrometry (241Am and 137Cs) and liquid scintillation counting (241Pu). Both 241Am and 137Cs activities are compared with those reported by Horrill [1983. Concentrations and spatial distribution of radioactivity in an ungrazed saltmarsh. In: Coughtrey, P.J. (Ed.), Ecological Aspects of Radionuclide Release. British Ecological Society Special Publication No. 3. Blackwell, Oxford, pp. 119–215.] Significant decreases in activities for both radionuclides were observed which is caused by the declining levels of discharges from the Sellafield nuclear reprocessing plant since the 1980s. It has been concluded that the spatial distribution of these radionuclides are controlled by the tidal currents and the clay contents in the sediments. There is evidence of surface erosion of the saltmarsh and redistribution of radionuclides in the saltmarsh using isotopic ratios of measured Pu.

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More information

Published date: August 2009
Keywords: Ravenglass saltmarsh, Sellafield, 241Am, 137Cs, 238Pu, 239, 240Pu and 241Pu, Gamma spectrometry, Radiochemical separation

Identifiers

Local EPrints ID: 69167
URI: http://eprints.soton.ac.uk/id/eprint/69167
ISSN: 0969-8043
PURE UUID: e5749f8a-ba2b-4417-a934-4dac8c67509c

Catalogue record

Date deposited: 22 Oct 2009
Last modified: 19 Jul 2017 00:13

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Contributors

Author: J.-S. Oh
Author: P.E. Warwick
Author: I.W. Croudace

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