The Philippine Nuclear Research Institute (PNRI) is a government agency under the Department of Science and Technology mandated to undertake research and development activities in the peaceful uses of nuclear energy, institute regulations on the said uses, and carry out the enforcement of said regulations to protect the health and safety of radiation workers and the general public.

The Philippine Research Reactor-1 (PRR-1) is a research reactor that is owned and maintained by the Philippine Nuclear Research Institute (PNRI) in Quezon City, Philippines. The PRR-1 is the first nuclear reactor and the only operating nuclear facility in the Philippines. The PRR-1 initially operated as a critical reactor from 1963 to 1988 and the facility became dormant for 34 years. A new subcritical reactor, the Subcritical Assembly for Training, Education, and Research (SATER), was setup within the facility which was first loaded with nuclear rods in June 2022.