United States Nuclear Regulatory Commission - Protecting People and the Environment

10 CFR Part 37—Physical Protection of Category 1 and Category 2 Quantities of Radioactive Material

On March 19, 2013, the NRC published the new 10 CFR Part 37 final rule in the Federal Register (78 FR 16922).  The new regulation establishes security requirements for the use and transport of the most risk-significant quantities of radioactive materials (i.e., International Atomic Energy Agency (IAEA) Category 1 and Category 2 quantities of radioactive materials), as well as for shipments of small amounts of irradiated reactor fuel.  The Category 1 and Category 2 quantities of radioactive materials are thresholds established by the IAEA in its Code of Conduct on the Safety and Security of Radioactive Sources.  The objective of 10 CFR Part 37 is to provide reasonable assurance of preventing the theft or diversion of Category 1 and Category 2 quantities of radioactive materials.  The final rule incorporates lessons learned by NRC and the Agreement States in implementing the post-September 11th security measures, as well as stakeholder input on the proposed rule.  The new 10 CFR Part 37 was effective on May 20, 2013 and NRC licensees must comply with the requirements by March 19, 2014.  Agreement States will have until March 19, 2016, to issue compatible requirements for their licensees.

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Types of Licensees Which Part 37 Could Apply To

  1. Industrial Licensees
  2. Academic and Research Licensees
  3. Medical Licensees
  4. Power Reactor Licensees
  5. Research and Test Reactors
  6. Decommissioning reactors
  7. Fuel Cycle licensees

Part 37 Documents

Contact Us

For any questions or comments related to any 10 CFR Part 37 topic, please send an email to Part37Resource@nrc.gov.

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Page Last Reviewed/Updated Wednesday, June 04, 2014