Department of Health, Medicine and Caring Sciences (HMV), Linköping University, 58183Linköping, Sweden.
Faculty of Chemistry, Department of Environmental Chemistry and Radiochemistry, Laboratory of Toxicology and Radiation Protection, University of Gdańsk, Wita Stwosza 63, 80-308Gdańsk, Poland.
Environ Sci Technol. 2023 Feb 7;57(5):1959-1969. doi: 10.1021/acs.est.2c07437. Epub 2023 Jan 23.
Plutonium distribution was studied in an undisturbed sediment core sampled from the Tvären bay in the vicinity of the Studsvik nuclear facility in Sweden. The complete analysis, including minor isotopes, of the Pu isotope composition (Pu, Pu, Pu, Pu, Pu, and Pu) allowed us to establish the Pu origin in this area of the Baltic Sea and to reconstruct the Studsvik aquatic release history. The results show highly enriched Pu, probably originating from the Swedish nuclear program in the 1960s and 1970s and the handling of high burn-up nuclear fuel in the later years. In addition, the Pu/Pu atomic ratio for the global fallout period between 1958 and 1965 is suggested to be (7.94 ± 0.31)·10. In the bottom layer of the sediment, dated 1953-1957, we detected a higher average Pu/Pu ratio of (1.51 ± 0.11)·10, indicating the possible impact of the first US thermonuclear tests (1952-1958).
钚在瑞典 Studsvik 核设施附近的 Tvären 湾未受干扰的沉积物岩芯中进行了分布研究。对 Pu 同位素组成（Pu、Pu、Pu、Pu、Pu 和 Pu）的完整分析，包括微量元素分析，使我们能够确定该波罗的海地区 Pu 的来源，并重建 Studsvik 水释放历史。结果表明，Pu 高度富集，可能源自瑞典 20 世纪 60 年代和 70 年代的核计划以及近年来对高燃耗核燃料的处理。此外，建议全球沉降期（1958 年至 1965 年）的 Pu/Pu 原子比为（7.94 ± 0.31）·10。在沉积物的底层，年代为 1953-1957 年，我们检测到更高的平均 Pu/Pu 比值为（1.51 ± 0.11）·10，表明可能受到第一次美国热核试验（1952-1958 年）的影响。
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