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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.

Background on Radiation and Material

On this page:

Legislation and Reports

Uses of Radioactive Material

Medical, Industrial, and Academic Uses of Nuclear Material. Definitions, questions and answers, and more.

Byproduct Material page. Definition and regulation.

Backgrounder on Byproduct Material. More on the categories, uses, and their regulation.

Radiation Safety

Radiation Protection. Expanded definition of radiation, description of sources, health effects, frequently asked questions, and information for radiation workers.

Radiation Protection (Environmental Protection Agency). Understanding radiation, awareness, health, glossary, and more.

Fact Sheet on Biological Effects of Radiation

Health Physics Society. Definitions, Ask the experts (Radiation Q&A), and more…

To learn more about uses of material, see our Medical, Industrial, and Academic Uses of Nuclear Materials web page.

Radiological Emergencies

Page Last Reviewed/Updated Wednesday, December 02, 2020

Page Last Reviewed/Updated Wednesday, December 02, 2020