The RBMK (Russian: Реактор Большой Мощности Канальный Reaktor Bolshoy Moshchnosti Kanalnyy, “High Power Channel-type Reactor”) is a class of graphite-moderated nuclear power reactor designed and built by the Soviet Union.
RBMK (russisk: Реактор Большой Мощности Канальный Reaktor Bolshoy Moshchnosti Kanalnyy) er en type af grafit-baseret atomreaktor designet og bygget i Sovjetunionen.