Nikolay Dollezhal

Nikolay Dollezhal
Born	October 27, 1899 Zaporizhia Oblast, Russian Empire, Present-day Ukraine
Died	Moscow, Russia
Citizenship	Soviet Union Russia
Nationality	Soviet Ukrainian Russian
Fields	Mechanical Engineering
Institutions	Institute of Chemical Physics Moscow State University Sternberg Astronomical Institute
Alma mater	Bauman Moscow State Technical University
Known for	Soviet atomic bomb project Founder of the RBMK type nuclear reactor nuclear marine propulsion
Notable awards	Order of Merit for the Fatherland Hero of Socialist Labour

Nikolay Antonovich Dollezhal (Russian: Николай Антонович Доллежа́ль; October 27, 1899 – November 20, 2000) was a Soviet mechanical engineer, a key figure in Soviet atomic bomb project and chief designer of nuclear reactors from the first plutonium production reactor to the RBMK.

Born in Omelnik, Zaporizhia Oblast, Dollezhal graduated MVTU in 1923. Until 1930, he worked in various design bureaus, but after a tour of Europe in 1929 he was arrested and spent a year and a half in prison, before being acquitted in January 1932. In 1932-1943 he headed important manufacturing plants in Kiev, Leningrad and Sverdlovsk.

In 1943, Dollezhal was appointed to lead the new Institute of Chemical Machinery in Moscow. In 1946, the Institute was assigned to the Soviet atomic project; his first reactors, graphite moderated types A and AI, produced Soviet plutonium used in Joe 1 nuclear test of 1949 and subsequent nuclear weapons deployment. After 1950, Dollezhal focused on nuclear marine propulsion. His first proposal, Type AM, was not practical for marine uses but became the core of the first nuclear power plant in Obninsk, commissioned in 1954. In the same year, he produced a viable draft of a light water submarine reactor.

Dollezhal pioneered the concept of the pressurized water reactor, which led to numerous military and VVER-type civilian designs. In 1957 Dollezhal Institute launched their first dual-use (civilian energy and weapons-grade plutonium) powerplant, Type EI, and seven years later, the first truly industrial Beloyarsk power plant. All subsequent Soviet reactors (VVER, RBMK) also originated from his firm.

Honours and awards

• Lenin Prize (1957)
• Three Stalin Prizes (1949, 1952 and 1953)
• Two USSR State Prizes (1970 and 1976)
• Hero of Socialist Labour, twice (1949 and 1984)
• Six Orders of Lenin (incl 1949 and 1984)
• Order of the October Revolution
• Order of the Red Banner of Labour
• Order of the Red Star
• Order of Merit for the Fatherland, 2nd class (1999)
• Kurchatov Gold Medal (Russian Academy of Sciences, 2000)