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Enewetak Atoll underwent 43 historical nuclear tests from 1948 to 1958, including the first hydrogen bomb test, resulting in a substantial nuclear material fallout contaminating the Atoll and the lagoon waters. The radionuclide fallout material deposited in lagoon sediments and soil on the islands will remain for decades to come. With intensifying climate and extreme weather events, the possibility of redistribution of deposited radionuclide material has become a great concern.

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Insights into plutonium in marine biota along the coast of China.

J Hazard Mater

January 2025

State Key Laboratory of Loess and Quaternary Geology, Xi'an AMS Center, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, PR China; Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an 710061, PR China. Electronic address:

Radiation risk through seafood consumption is a big public concern under the discharge of nuclear contaminated water. Plutonium is an important radionuclide in view of radiation risk due to its high radiological and chemical toxicity, as well as consistent presence in the environment. The distribution and level of plutonium isotopes (Pu, Pu) in marine biota collected along the coast of China in 2022-2023 were investigated.

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Anthropogenic actinides in seawater and biota from the west coast of Sweden.

Environ Pollut

December 2024

Department of Health, Medicine and Caring Sciences (HMV), Linköping University, 58183, Linköping, Sweden.

The assessment of the origin of the anthropogenic contamination in marine regions impacted by other sources than global fallout is a challenge. This is the case of the west coast of Sweden, influenced by the liquid effluents released by the European Nuclear Reprocessing Plants through North Sea currents and by Baltic Sea local and regional sources, among others. This work focused on the study of anthropogenic actinides (U, Np and Pu) in seawater and biota from a region close to Gothenburg where radioactive wastes with an unknown composition were dumped in 1964.

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For the quality control in determining transuranic nuclides in fallout samples, this work first reported the Np activity concentration in a reference fallout material and further calculated the activity ratios of Np/Pu and Np/Am, and the atom ratio of Np/Pu in it. The reference fallout material prepared by the Meteorological Research Institute was collected at 14 stations throughout Japan in 1963-1979. The Np and Pu isotopes (Pu and Pu) were separated and purified using AG MP-1M anion-exchange resin, quantified using Pu as an isotope dilution tracer, and determined by the SF-ICP-MS.

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Modeling Plutonium Decorporation in a Female Nuclear Worker Treated with Ca-DTPA after Inhalation Intake.

Health Phys

July 2024

United States Transuranium and Uranium Registries (USTUR), College of Pharmacy and Pharmaceutical Sciences, Washington State University (WSU), Richland, WA 99354.

The present work models plutonium (Pu) biokinetics in a female former nuclear worker. Her bioassay measurements are available at the US Transuranium and Uranium Registries. The worker was internally exposed to a plutonium-americium mixture via acute inhalation at a nuclear weapons facility.

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