What is the primary regulatory body overseeing the use of nuclear gauges in most countries?

The Nuclear Regulatory Commission (NRC) in the United States is the primary regulatory body overseeing the use of nuclear gauges due to its specific mandate to regulate commercial nuclear power and the use of nuclear materials within the country. The NRC sets standards for the safe handling and usage of radioactive materials, including those found in nuclear gauges, which are commonly used for measuring density, moisture, and other properties in various industries.

The NRC's role includes issuing licenses for the use of nuclear gauges, ensuring compliance with safety standards, and conducting inspections to monitor adherence to regulations. These responsibilities are critical in protecting public health and safety, as well as the environment, from the potential hazards associated with radioactive materials.

While the International Atomic Energy Agency (IAEA) provides guidance and frameworks for nuclear safety internationally, and other agencies like the Environmental Protection Agency (EPA) and the Occupational Safety and Health Administration (OSHA) have roles in environmental protection and worker safety, respectively, the NRC is specifically tasked with the regulation of nuclear materials and is the principal authority in the U.S. concerning nuclear gauge usage.