Long-Term Reduction in 137Cs Concentration in Food Crops on Coral Atolls Resulting from Potassium Treatment [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2005. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
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- PDF-file: 24 pages; size: 0 Kbytes
- Additional Creators:
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Bikini Island was contaminated March 1, 1954 by the Bravo detonation (U.S nuclear test series, Castle) at Bikini Atoll. About 90% of the estimated dose from nuclear fallout to potential island residents is from cesium-137 (¹³⁷Cs) transferred from soil to plants that are consumed by residents. Thus, radioecology research efforts have been focused on removing ¹³⁷Cs from soil and/or reducing its uptake into vegetation. Most effective was addition of potassium (K) to soil that reduces ¹³⁷Cs concentration in fruits to 3-5% of pretreatment concentrations. Initial observations indicated this low concentration continued for some time after K was last applied. Long-term studies were designed to evaluate this persistence in more detail because it is very important to provide assurance to returning populations that ¹³⁷Cs concentrations in food (and, therefore, radiation dose) will remain low for extended periods, even if K is not applied annually or biennially. Potassium applied at 300, 660, 1260, and 1970 kg ha⁻¹ lead to a ¹³⁷Cs concentration in drinking coconut meat that is 34, 22, 10, and about 4 % of original concentration, respectively. Concentration of ¹³⁷Cs remains low 8 to 10 y after K is last applied. An explanation for this unexpected result is discussed.
- Published through SciTech Connect., 04/08/2005., "ucrl-jrnl-211274", Journal of Environmental Radioactivity 88 3 ISSN 0265-931X; JERAEE FT, and Hamilton, T; Robison, W; Conrado, C; Stone, E.
- Funding Information:
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