Leningrad Nuclear Power Plant (Russian: Ленинградская атомная электростанция; Ленинградская АЭС Leningradskaya atomnaya elektrostantsiya; Leningradskaya AES (pronunciationⓘ)) is a nuclear power plant located in the town of Sosnovy Bor in Russia's Leningrad Oblast, on the southern shore of the Gulf of Finland, some 70 kilometres (43 mi) to the west of the city centre of Saint Petersburg.

On 7 January 1975, a concrete tank containing radioactive gases from Unit 1 exploded; there were no reported accident victims or radiation releases.

[12][13] Less than a month later, on 6 February 1975, the secondary cooling circuit of Unit 1 ruptured, releasing contaminated water into the environment.

[12][13][15] In July 1976 and again in September 1979, due to a poor safety culture, a fire broke out in a concrete vault containing radioactive waste.

[15][13] On 28 December 1990, during refurbishment of Unit 1, it was noticed that the space between the fuel channels and the graphite stack (contaminated during the 1975 accident) had widened.

[15][13] On 3 December 1991, due to faulty equipment and lack safety rule compliance, 10 new fuel rods were dropped and damaged.

[13] In March 1992, an accident at the plant leaked radioactive gases and iodine into the air through a ruptured fuel channel.

[17] The plant's management refuted rumors of an accident and stated that the third unit was stopped for a "short-term unscheduled maintenance", with a restart scheduled for 31 August 2009.

[23] On 25 October 2008, Saint Petersburg Atomenergoproekt began concreting the foundation plate of the reactor building of the Leningrad Nuclear Power Plant II, Unit 1.