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Temporal Trend in the Transfer of Sellafield-Derived 14C into Different Size Fractions of the Carbonate Component of NE Irish Sea Sediment

Published online by Cambridge University Press:  09 February 2016

Graham K P Muir ,
Gordon T Cook ,
Brian G Tripney ,
Angus B MacKenzie ,
Helena Stewart  and
Kieran M Tierney
Graham K P Muir*
Affiliation:
Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland
Gordon T Cook
Affiliation:
Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland
Brian G Tripney
Affiliation:
Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland
Angus B MacKenzie
Affiliation:
Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland
Helena Stewart
Affiliation:
Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland
Kieran M Tierney
Affiliation:
Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, Scotland
*
1Corresponding author. Email: Graham.Muir@glasgow.ac.uk.
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Abstract

From 1994 onwards, radiocarbon discharges from the Sellafield nuclear fuel reprocessing plant have been made largely to the northeast Irish Sea. They represent the largest contributor to UK and European populations of the collective dose commitment derived from the entire nuclear industry discharges. Consequently, it is important to understand the long-term fate of 14C in the marine environment. Research undertaken in 2000 suggested that the carbonate component of northeast Irish Sea sediments would increase in 14C activity as mollusk shells, which have become enriched in Sellafield-derived 14C, are broken down by physical processes including wave action and incorporated into intertidal and subtidal sediments. The current study, undertaken in 2011, tested this hypothesis. The results demonstrate significant increases in 14C enrichments found in whole mussel shells compared to those measured in 2000. Additionally, in 2000, there was an enrichment above ambient background within only the largest size fraction (>500 μm) of the intertidal inorganic sediment at Nethertown and Flimby (north of Sellafield). In comparison, the present study has demonstrated 14C enrichments above ambient background in most size fractions at sites up to 40 km north of Sellafield, confirming the hypothesis set out more than a decade ago.

Type
Articles
Information
Radiocarbon , Volume 57 , Issue 3 , 2015 , pp. 347 - 354
Copyright
Copyright © 2015 by the Arizona Board of Regents on behalf of the University of Arizona 

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References

Aston, SR, Stanners, DA. 1982. The transport to and deposition of americium in intertidal sediments of the Ravenglass estuary and its relationship to plutonium. Environmental Pollution Series B 3(1):1–9.Google Scholar
Aston, SR, Assinder, DJ, Stanners, DA, Rae, JE. 1981. Plutonium occurrence and phase distribution in sediments of the Wyre estuary, northwest England. Marine Pollution Bulletin 12(9):308–14.Google Scholar
Begg, FH. 1992. Anthropogenic 14C in the natural (aquatic) environment [PhD thesis]. Glasgow University.Google Scholar
Begg, FH, Cook, GT, Baxter, MS, Scott, EM, McCartney, M. 1992. Anthropogenic radiocarbon in the eastern Irish Sea and Scottish coastal waters. Radiocarbon 34(3):704–16.Google Scholar
BNFL (British Nuclear Fuels). 2002. Discharges and Monitoring of the Environment in the UK. Annual Report 2001. Risley, UK.Google Scholar
Cook, GT, Begg, FH, Naysmith, P, Scott, EM, McCartney, M. 1995. Anthropogenic 14C marine geochemistry in the vicinity of a nuclear fuel reprocessing plant. Radiocarbon 37(2):459–67.CrossRefGoogle Scholar
Cook, GT, MacKenzie, AB, McDonald, P, Jones, SR. 1997. Remobilization of Sellafield-derived radionuclides and transport from the north-east Irish Sea. Journal of Environmental Radioactivity 35(3):227–41.Google Scholar
Cook, GT, MacKenzie, AB, Naysmith, P, Anderson, R. 1998. Natural and anthropogenic 14C in the UK coastal marine environment. Journal of Environmental Radioactivity 40(1):89–111.Google Scholar
Cook, GT, Scott, EM, MacKenzie, AB, Naysmith, FH, Isogai, K, Kershaw, PJ, Anderson, R, Naysmith, P. 2004a. Reconstructing the history of 14C discharges from Sellafield Part 2. Aquatic discharges. Journal of Radioanalytical and Nuclear Chemistry 260(2):239–47.Google Scholar
Cook, GT, MacKenzie, AB, Muir, GKP, Mackie, G, Gulliver, P. 2004b. Sellafield-derived anthropogenic 14C in the marine intertidal environment of the NE Irish Sea. Radiocarbon 46(2):877–83.Google Scholar
Freeman, SPHT, Dougans, AB, McHargue, L, Wilcken, KM, Xu, S. 2008. Performance of the new single stage accelerator mass spectrometer at the SUERC. Nuclear Instruments and Methods in Physics Research B 266(10):2225–8.Google Scholar
Freeman, SPHT, Cook, GT, Dougans, AB, Naysmith, P, Wilcken, KM, Xu, S. 2010. Improved SSAMS performance. Nuclear Instruments and Methods in Physics Research B 268(7–8):715–7.Google Scholar
Gillikin, DP, Dehairs, F, Lorrain, A, Steenmans, D, Baeyens, W, André, L. 2006. Barium uptake into the shells of the common mussel (Mytilus edulis) and the potential for estuarine paleo-chemistry reconstruction. Geochimica et Cosmochimica Acta 70(2):395–407.Google Scholar
Gray, J, Jones, SR, Smith, AD. 1995. Discharges to the environment from the Sellafield site, 1951–1992. Journal of Radiological Protection 15(2):99–131.CrossRefGoogle Scholar
Gulliver, P, Cook, GT, MacKenzie, AB, Naysmith, P, Anderson, R. 2001. Transport of Sellafield-derived 14C from the Irish Sea through the North Channel. Radiocarbon 43(2B):869–77.Google Scholar
Hunt, GJ. 1985. Timescales for dilution and dispersion of transuranics in the Irish Sea near Sellafield. Science of the Total Environment 46(1–4):261–78.CrossRefGoogle Scholar
Lalli, CM, Parsons, TR. 1993. Biological Oceanography: An Introduction. Oxford: Pergamon Press. p 52–79.Google Scholar
MacKenzie, AB, Scott, RD, Williams, TM. 1987. Mechanisms for northward dispersion of Sellafield waste. Nature 239(6134):42–5.Google Scholar
MacKenzie, AB, Scott, RD, Allan, RL, Ben Shaban, YA, Cook, GT, Pulford, ID. 1994. Sediment radionuclide profiles: implications for mechanisms of Sellafield waste dispersal in the Irish Sea. Journal of Environmental Radioactivity 23(1):39–69.CrossRefGoogle Scholar
MacKenzie, AB, Cook, GT, McDonald, P, Jones, SR. 1998. The influence of mixing timescales and re-dissolution processes on the distribution of radionuclides in Northeast Irish Sea sediments. Journal of Environmental Radioactivity 39(1):35–53.Google Scholar
MacKenzie, AB, Cook, GT, McDonald, P. 1999. Radionuclide distributions and particle size associations in Irish Sea surface sediments: implications for actinide dispersion. Journal of Environmental Radioactivity 44(2–3):273–96.CrossRefGoogle Scholar
MacKenzie, AB, Cook, GT, Barth, J, Gulliver, P, McDonald, P. 2004. 14C and δ13C characteristics of organic matter and carbonate in saltmarsh sediments from south west Scotland. Journal of Environmental Monitoring 6:441–7.Google Scholar
MAFF (Ministry of Agriculture, Fisheries and Food). 1994. Radioactivity in the surface and coastal waters of the British Isles, 1993. Aquatic Environment Monitoring Report. No. 42. Lowestoft: MAFF.Google Scholar
MAFF (Ministry of Agriculture, Fisheries and Food). 1995. Radioactivity in the surface and coastal waters of the British Isles, 1994. Aquatic Environment Monitoring Report. No. 45. Lowestoft: MAFF.Google Scholar
McCartney, M, Kershaw, PJ, Woodhead, DS, Denoon, DC. 1994. Artificial radionuclides in the surface sediments of the Irish Sea. Science of the Total Environment 141:103–38.Google Scholar
McConnaughey, TA, Burdett, J, Whelan, JF, Paull, CK. 1997. Carbon isotopes in biological carbonates: respiration and photosynthesis. Geochimica et Cosmochimica Acta 61(3):611–22.Google Scholar
McDonald, P, Cook, GT, Baxter, MS, Thomson, JC. 1990. Radionuclide transfer from Sellafield to south-west Scotland. Journal of Environmental Radioactivity 12(3):285–98.Google Scholar
Mook, WG, van der Plicht, J. 1999. Reporting 14C activities and concentrations. Radiocarbon 41(3):227–39.Google Scholar
Naysmith, P, Cook, GT, Freeman, SPHT, Scott, EM, Anderson, R, Xu, S, Dunbar, E, Muir, GKP, Dougans, A, Wilcken, K, Schnabel, C, Russell, N, Ascough, PL, Maden, C. 2010. 14C AMS measurements at SUERC: improving QA data from the 5MV tandem AMS and 250kV SSAMS. Radiocarbon 52(2–3):263–71.Google Scholar
Nuclear Decommissioning Authority. 2011. Sellafield Ltd: Monitoring our Environment, Discharges and Monitoring in the United Kingdom, Annual Report 2010. Available at http://sellafieldsites.com/wp-content/uploads/2012/08/Monitoring-Our-Environment-20101.pdf.Google Scholar
Pentreath, RJ, Lovett, MB, Jefferies, DF, Woodhead, DS, Talbot, JW, Mitchell, NT. 1984. Impact on public radiation exposure of transuranium nuclides discharged in liquid wastes from fuel element reprocessing at Sellafield, United Kingdom. In: Radioactive Waste Management. Volume 5. Vienna: IAEA.Google Scholar
Radioactivity in Food and the Environment (RIFE). 1996–2012. Radioactivity in Food and the Environment, Food Standards Agency. RIFE reports 1–10.Google Scholar
Slota, P Jr, Jull, AJT, Linick, TW, Toolin, LJ. 1987. Preparation of small samples for 14C accelerator targets by catalytic reduction of CO. Radiocarbon 29(2):303–6.Google Scholar
United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). 2008. Report to the General Assembly, Annex B: Exposure of the Public and Workers of Various Sources of Radiation. New York: United Nations. Volume 1, p 247.Google Scholar
Wolstenholme, A, Cook, GT, MacKenzie, AB, Naysmith, P, Meadows, PS, McDonald, P. 1998. The behavior of Sellafield-derived 14C in the northeast Irish Sea. Radiocarbon 40(1):447–58.Google Scholar