The Greek Atomic Energy Commission (GAEC) is the national competent authority, responsible for radiation protection, nuclear safety and nuclear security.

It is an independent public service whose primary mission is the protection of the public, workers and the environment from ionising and artificially produced non-ionising radiation.

GAEC was founded in 1954 and re-established in 1987. It is supervised by the General Secretariat for Research and Technology under the Ministry of Education, Lifelong Learning and Religious Affairs.