Leningrad Nuclear Power Plant

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Leningrad Nuclear Power Plant
RIAN archive 305005 Leningrad nuclear power plant.jpg
Site of the Nuclear Power Plant Leningrad, including the construction site of the Nuclear Power Plant Leningrad II.
Leningrad Nuclear Power Plant is located in Leningrad Oblast
Leningrad Nuclear Power Plant
Location of Leningrad Nuclear Power Plant
Country Russia
Location Sosnovy Bor, Leningrad Oblast
Coordinates 59°50′50″N 29°02′37″E / 59.84722°N 29.04361°E / 59.84722; 29.04361Coordinates: 59°50′50″N 29°02′37″E / 59.84722°N 29.04361°E / 59.84722; 29.04361
Status Operational
Construction began 1 March 1970 (Leningrad Nuclear Power Plant I)
25 October 2008 (Leningrad Nuclear Power Plant II)
Commission date 1 November 1974 (Leningrad Nuclear Power Plant I)
Decommission date 2016 (planned, Leningrad Nuclear Power Plant I)
Owner(s) Rosenergoatom
Nuclear power station
Reactor type RBMK-1000 (Leningrad Nuclear Power Plant I)
VVER-1200/V491 (AES-2006) (Leningrad Nuclear Power Plant II)
Reactor supplier Atomstroyexport
Power generation
Units operational 4 × 925 MW
Units under const. 2 × 1085 MW
Units planned 2 × 1085 MW
Nameplate capacity 3700 MW
Capacity factor 60.5%
Annual net output 21,208 GW·h

Leningrad Nuclear Power Plant (Russian: Ленинградская атомная электростанция; Ленинградская АЭС (About this sound 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. It consists of four nuclear reactors of the RBMK-1000 type. These reactors are similar to reactors No. 1 and 2 of the Chernobyl Nuclear Power Plant. Two units of the VVER-1200 type are under construction at Power Plant II to replace the current RBMK reactors when they reach the end of their service lives.

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. Cost of the project is estimated to be almost 70 billion Russian ruble (RUR).[1][2] A construction licence was issued on 22 July 2009.[3]

From May 2012 to December 2013, Unit 1 was offline while repairs were made related to some deformed graphite moderator blocks.[4]

Reactor data

Unit[5] Reactor type Net capacity
in MW
Gross capacity
in MW
Leningrad - 1 RBMK-1000 925 1000 1970-03-01 1973-12-21 1974-11-01 (2019)
Leningrad - 2 RBMK-1000 925 1000 1970-06-01 1975-07-11 1976-02-11 (2021)
Leningrad - 3 RBMK-1000 925 1000 1973-12-01 1979-12-07 1980-06-29 (2025)
Leningrad - 4 RBMK-1000 925 1000 1975-02-01 1981-02-09 1981-08-29 (2026)
Leningrad II - 1 VVER-1200/491 (AES-2006) 1085 1199 2008-10-25 (May 2017[6]) (2018[6]) -
Leningrad II - 2 VVER-1200/491 (AES-2006) 1085 1199 2010-04-15[7] (2018[6]) (2019[6]) -
Leningrad II - 3 VVER-1200/491 (AES-2006) 1085 1199 (Planned)[8]  ?  ?  ?
Leningrad II - 4 VVER-1200/491 (AES-2006) 1085 1199 (Planned)[9]  ?  ?  ?

Incidents and accidents

Fuel-handling assembly at Leningrad Nuclear Power Plant

The first accident at the plant occurred shortly after the first unit came online. On 7 January 1975 a concrete tank containing radioactive gases from Unit 1 exploded; there were no reported accident victims or radiation releases.[10][11]

Less than one month later, on 6 February 1975, the secondary cooling circuit of Unit 1 ruptured, releasing contaminated water into the environment. Three people were killed, and the accident was not reported in the media.[10][11]

On 28 November 1975 a fuel channel in Unit 1 suffered a loss of coolant, resulting in the degradation of a nuclear fuel assembly that led to a significant release of radiation lasting for one month. Immediately after the accident, the radiation level in Sosnovy Bor, 5 kilometres (3.1 mi) from the affected power unit, was 600 mR/h; in total, 1.5 MCi was released into the environment.[12] The exposed inhabitants of the Baltic region were not notified of the danger. The accident was not reported in the media. (Practically the same accident occurred in Unit 1 of the Chernobyl Power Station in 1982.)[10][11][13]

In July 1976 and again in September 1979, due to a poor safety culture, fire broke out in a concrete vault containing radioactive waste. Water used in extinguishing the fires was contaminated, leaked into the environment, and entered the water table. This was not reported in the media.[13][11]

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. The contaminated graphite was spilled, and the radiation levels in the space under the reactor increased. Radiation was detected 6 km away from the unit, but this was not reported in the media.[13][11]

On 3 December 1991, due to faulty equipment and lax safety rule compliance, 10 new fuel rods were dropped and damaged. The staff tried to conceal the accident from the management.[11]

In March 1992, an accident at the Sosnovy Bor nuclear plant leaked radioactive gases and iodine into the air through a ruptured fuel channel. This was the first accident at the station that was announced in the news media.[14]

On 27 August 2009, the third unit was stopped when a hole was found in the discharge header of a pump.[15] According to the automated radiation control system, the radiation situation at the plant and in its 30-kilometre (19 mi) monitoring zone was normal.[15] 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.[16]

On 19 December 2015, unit 2 was stopped (scrammed) due to a broken steam pipe. No radioactively contaminated material was released. The situation inside Leningrad Nuclear Power Plant and the industrial area around the station has not changed and the radiation level remains within the limits of natural background values.

See also


  1. ^ Leningrad NPP-2: Concreting of the foundation plate of the reactor building of the 1st unit started; 27 October 2008permanent dead link:
  2. ^ Construction starts at Leningrad II; 27 October 2008:
  3. ^ "Go-ahead for second Leningrad II unit". World Nuclear News. 22 July 2009. Retrieved 26 July 2009. 
  4. ^ "Restored RBMK back on line". World Nuclear News. 2 December 2013. Retrieved 3 December 2013. 
  5. ^ Power Reactor Information System of the IAEA: "Russian Federation: Nuclear Power Reactors" Archived 26 December 2008 at the Wayback Machine.
  6. ^ a b c d https://nevnov.ru/435827-pervyj-energoblok-laes-2-nachnet-vyrabotku-energii-uzhe-v-mae-2017-goda
  7. ^ Power Reactor Details Leningrad II-2 on the PRIS of the IAEA Archived 28 June 2011 at the Wayback Machine.
  8. ^ Power Reactor Details Leningrad II-3 on the PRIS of the IAEApermanent dead link
  9. ^ Power Reactor Details Leningrad II-4 on the PRIS of the IAEApermanent dead link
  10. ^ a b c Nuclear Encyclopedia, chief editor A. A. Yaroshinskaya. - Moscow: the Charity Fund of Yaroshinskaya, 1996. - 656p.
  11. ^ a b c d e f V. M. Kuznetsov, Russian Nuclear Power Engineering Yesterday, Today, Tomorrow. Opinion of independent expert. - Moscow: National press institute, 2000. - 288 p.
  12. ^ Controlling Technology By Stephen H. Unger, p. 88.
  13. ^ a b c V. A. Melnikov, N. B. Malevannaya, Radiological Safety During the Operation of Nuclear Complex in Sosnovy Bor. - presentation at the international conference ENERGY. ECOLOGY. SAFETY, May 25–27, 1999, Sosnovy Bor.
  14. ^ Nuclear Energy Institute, Source Book: Soviet-Designed Nuclear Power Plants in Russia, Ukraine, Lithuania, Armenia, the Czech Republic, the Slovak Republic, Hungary and Bulgaria Archived 11 December 2012 at the Library of Congress, 5th edition, 1997, p. 141.
  15. ^ a b The third unit of Leningrad NPP has been stoppedpermanent dead link, Rosenergoatom, 28 August 2009
  16. ^ Leningrad NPP refutes rumors about accidentpermanent dead link, Rosenergoatom, 28 August 2009

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