Technetium-99 is a long-lived radioactive byproduct of nuclear fuel production and reprocessing. In many environments, it forms a highly mobile chemical species that can move readily through water and soil, making it a priority contaminant at legacy nuclear sites including Sellafield in the U.K. and Hanford in the United States.

Technetium-99 is a long-lived radioactive byproduct of nuclear fuel production and reprocessing. In many environments, it forms a highly mobile chemical species that can move readily through water and soil, making it a priority contaminant at legacy nuclear sites including Sellafield in the U.K. and Hanford in the United States.

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