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Isotopes & Radiation

The U.S. Million Person Study of Low-Dose-Rate Health Effects

June 27, 2025, 3:02PMNuclear NewsLawrence Dauer
Clockwise from top left: Calutron operators at their panels in the Y-12 plant at Oak Ridge, Tenn., the USS Nautilus SSN571, women working in a factory of the United States Radium Corporation, and the front face of the B Reactor at the Hanford site.

There is a critical knowledge gap regarding the health consequences of exposure to radiation received gradually over time. While there is a plethora of studies on the risks of adverse outcomes from both acute and high-dose exposures, including the landmark study of atomic bomb survivors, these are not characteristic of the chronic exposure to low-dose radiation encountered in occupational and public settings. In addition, smaller cohorts have limited numbers leading to reduced statistical power.

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