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Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

NRC Videos

The NRC YouTube Channel enables us to publish existing and newly created videos that feature brief topics of interest to inform and educate the public. We post small segments of some important Commission briefings, videos previously produced but not extensively distributed and new content. We hope the videos enhance the public's understanding of the agency and its mission, and give a face to the people who work hard every day to protect people and the environment.

A Day in the Life of an NRC Resident Inspector

Q&As with NRC Kids

History of Health physics: 1891-1900

History of Health physics: 1901-1910

History of Health physics: 1911-1920

History of Health physics: 1921-1930

History of Health physics: 1931-1940

History of Health physics: 1941-1950

History of Health physics: 1951-1960

History of Health physics: 1961-1970

History of Health physics: 1971-1980

History of Health physics: 1981-1990

History of Health physics: 1991-Today

Atomic Components

Half-Life

Radiation Effects on Human Cells

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Page Last Reviewed/Updated Tuesday, August 05, 2025

Page Last Reviewed/Updated Tuesday, August 05, 2025