Sergey Anatolievich Preminin (Russian: Сергей Анатольевич Преминин; 18 October 1965 – 3 October 1986) was a Soviet Russian sailor who, after an explosion aboard nuclear submarine K-219, prevented an impending nuclear meltdown by manually forcing damaged control rods into place. He was, however, unable to exit the reactor compartment because the hatch had jammed due to increased pressure, and died. Preminin was posthumously awarded the Order of the Red Star, the medal of Hero of the Russian Federation and the Order "For Merit to the Fatherland".