Abstract
The Marshall Islands Program at the Lawrence Livermore National Laboratory has completed a series of radiological surveys at Bikini, Rongelap, Utrōk, and Enewetak Atolls in the Marshall Islands designed to take a representative sample of food supplies with emphasis on determining 137Cs activity concentrations in common food plants. Coconuts (Cocos nucifera L.) are the most common and abundant food plant, and provided a common sample type to characterize the level and variability of activity concentrations of 137Cs in plant foods collected from different islands and atolls. Other dominant food types included Pandanus (Pandanus spp.) and breadfruit (Actocarpus spp.). In general, the activity concentration of 137Cs in food plants was found to decrease significantly between the main residence islands on Bikini, Rongelap, Utrōk, and Enewetak Atolls. The mean activity concentration of 137Cs measured in drinking coconut meat and juice was 0.72 (95 % CI 0.68–0.77) and 0.34 (95 % CI 0.30–0.38) Bq g−1, respectively, on Bikini Island; 0.019 (95 % CI 0.017–0.021) and 0.027 (95 % CI 0.023–0.031) Bq g−1, respectively, on Rongelap Island; 0.010 (95 % CI 0.007–0.013) and 0.007 (95 % CI 0.004–0.009) Bq g−1, respectively, on Utrōk Island; and 0.002 (95 % CI 0.0013–0.0024) and 0.002 (95 % CI 0.001–0.0025) Bq g−1, respectively, on Enewetak Island. High levels of variability are reported across all islands. These results will be used to improve the accuracy and reliability of predictive dose assessments, help characterize levels of uncertainty and variability in activity concentrations of fallout radionuclides in plant foods, and allow atoll communities to make informed decisions about resettlement and possible options for cleanup and rehabilitation of islands and atolls.
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References
UNSCEAR (2000) Sources and effects of ionizing radiation. United Nations States Scientific Committee on the Effects of Atomic Radiation. UNSCEAR 2000 Report to the General Assembly, with Scientific Annexes, vol 1: Sources. United Nations, New York, pp 654
Robison WL, Hamilton TF (2010) Health Phys 98(1):1–11
Robison WL, Stone EL, Hamilton TF, Conrado CL (2006) J Environ Radioact 88:166–251
Hamilton TF (2010) Marshall Islands Monit. 2(3–4):2–5
Robison WL, Bogen KT, Conrado CL (1997) Health Phys 73:100–114
Robison WL, Noshkin VE, Conrado CL, Eagle RL, Brunk JL, Jokela TA, Mount ME, Philips WA, Stoker AC, Stuart ML, Wong KM (1997) Health Phys 73:37–48
Simon SL, Graham JC (1997) Health Phys 73:66–85
Robison WL, Bogen KT, Conrado CL, Stoke AC (2003) J Environ Radioact 69:207–223
Hamilton TF, Martinelli RM, Kehl SR, Peters SKG (2012) submitted Health Phys
Hamilton TF, Robison WL, Kehl SR, Stoker AC, Conrado CL (2000) J Radioanal Nucl Chem 243(2):415–422
Brunk JL (1995) Instructions for calibrating Gamma Detectors using the Canberra-Nuclear Data Genie Gamma Spectrometry System, Lawrence Livermore National Laboratory, UCRL-ID-120428
Robison WL, Hamilton TF, Bogen KT, Conrado CL, Kehl SR (2008) J Environ Radioact 99:181–189
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This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory in part under Contract W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344.
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Peters, S.K.G., Kehl, S.R., Martinelli, R.E. et al. Distribution of cesium-137 in tree crop products collected from residence islands impacted by the U.S. nuclear test program in the northern Marshall Islands. J Radioanal Nucl Chem 296, 209–214 (2013). https://doi.org/10.1007/s10967-012-2139-6
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DOI: https://doi.org/10.1007/s10967-012-2139-6