Advanced Test Reactor

Companies 1

• Idaho National Laboratory operates Advanced Test Reactor Research/test reactor, in operation since 1967 (per DOE page). Quote places ATR at INL; INL as operator is inferred (DOE page does not literally say 'operated by INL').

  “The Advanced Test Reactor (ATR) at Idaho National Laboratory is the largest and most powerful research reactor in the world.”

  ¹energy.gov · checked 2026-10-10 High confidence Report a correction: Idaho National Laboratory operates Advanced Test Reactor

Sources 3