Which act regulates the use of atomic energy?

The Atomic Energy Act is the primary legislation that regulates the use of atomic energy in the United States. This act was initially passed in 1946 and has undergone several amendments to reflect the evolving needs and concerns regarding the use of nuclear materials and the management of atomic energy. The legislation covers a wide range of topics, including the development, regulation, and safe use of nuclear energy and materials. It established the framework for the licensing of nuclear power plants, the safety standards for handling radioactive materials, and the oversight by the Nuclear Regulatory Commission (NRC).

This act plays a critical role in ensuring public safety and environmental protection while facilitating the beneficial use of nuclear technology. In contrast, the other acts mentioned focus on different areas: the Toxic Substances Control Act addresses the regulation of chemicals, the Resource Conservation and Recovery Act pertains to waste management, and the Food Additives Amendment is concerned with the safety of food additives. Therefore, the Atomic Energy Act is specifically tailored to the nuances of atomic energy regulation, making it the correct choice for this question.