Sayano-Shushenskaya Dam: Difference between revisions
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The '''Sayano–Shushenskaya Dam''' ({{lang-ru|Сая́но-Шу́шенская гидроэлектроста́нция, ''Sayano-Shushenskaya Gidroelektrostantsiya''}}) is located on the [[Yenisei River]], near [[Sayanogorsk]] in [[Khakassia]], [[Russia]]. It is the largest power plant in Russia and the [[List of largest hydroelectric power stations|9th-largest]] [[Hydroelectricity|hydroelectric plant]] in the world, by average power generation. The full legal name of the power plant, ''OJSC [Open Joint-Stock Society] P. S. Neporozhny Sayano-Shushenskaya HPP [hydro power plant]'', refers to the Soviet-time Minister of Energy and Electrification [[Pyotr Neporozhny]].<ref>[http://www.eng.rushydro.ru/file/main/english/investors/reports/annual-reports/RusHydro_Annual_Report_2008.pdf Microsoft Word – RusHydro_Annual Report.doc]. (PDF) . Retrieved on 2011-06-20.</ref> The head of the power plant is Valery Kyari.<ref name=interfax300909> |
The '''Sayano–Shushenskaya Dam''' ({{lang-ru|Сая́но-Шу́шенская гидроэлектроста́нция, ''Sayano-Shushenskaya Gidroelektrostantsiya''}}) is located on the [[Yenisei River]], near [[Sayanogorsk]] in [[Khakassia]], [[Russia]]. It is the largest power plant in Russia and the [[List of largest hydroelectric power stations|9th-largest]] [[Hydroelectricity|hydroelectric plant]] in the world, by average power generation. The full legal name of the power plant, ''OJSC [Open Joint-Stock Society] P. S. Neporozhny Sayano-Shushenskaya HPP [hydro power plant]'', refers to the Soviet-time Minister of Energy and Electrification [[Pyotr Neporozhny]].<ref>[http://www.eng.rushydro.ru/file/main/english/investors/reports/annual-reports/RusHydro_Annual_Report_2008.pdf Microsoft Word – RusHydro_Annual Report.doc]. (PDF) . Retrieved on 2011-06-20.</ref> The head of the power plant is Valery Kyari.<ref name=interfax300909>{{cite news|title=Even worse disaster was prevent in first hour after dam accident -expert |publisher=[[Interfax]] |date=2009-08-30 |url=http://www.interfax.com/3/513925/news.aspx |accessdate=2009-09-05 |deadurl=yes |archiveurl=https://web.archive.org/20090831204503/http://www.interfax.com:80/3/513925/news.aspx |archivedate=31 August 2009 }} |
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</ref><ref name=bbc080909>{{cite news|title=Russia 'had dam disaster warning' |publisher=BBC News |date=2009-09-08 |url=http://news.bbc.co.uk/2/hi/europe/8244602.stm |accessdate=2009-09-12 |deadurl=yes |archiveurl=https://web.archive.org/20090911112728/http://news.bbc.co.uk:80/2/hi/europe/8244602.stm |archivedate=11 September 2009 }} |
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Revision as of 10:51, 23 February 2016
Sayano–Shushenskaya Dam | |
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Location | Sayanogorsk, Khakassia, Russia |
Construction began | 1968 |
Opening date | 1978 |
Operator(s) | RusHydro |
Dam and spillways | |
Type of dam | Arch-gravity dam |
Impounds | Yenisei River |
Height | 242 m (794 ft) |
Length | 1,066 m (3,497 ft) |
Width (crest) | 25 m (82 ft) |
Width (base) | 105.7 m (347 ft) |
Spillway capacity | 13,600 m3/s (480,000 cu ft/s) |
Reservoir | |
Creates | Sayano–Shushenskoe reservoir |
Total capacity | 31.3 km3 (7.5 cu mi) |
Surface area | 621 km2 (240 sq mi) |
Power Station | |
Type | Conventional |
Hydraulic head | 194 m (636 ft) |
Turbines | 10 × 640 MW |
Installed capacity | 6,400 MW |
Annual generation | 23.5 TWh |
The Sayano–Shushenskaya Dam ([Сая́но-Шу́шенская гидроэлектроста́нция, Sayano-Shushenskaya Gidroelektrostantsiya] Error: {{Lang-xx}}: text has italic markup (help)) is located on the Yenisei River, near Sayanogorsk in Khakassia, Russia. It is the largest power plant in Russia and the 9th-largest hydroelectric plant in the world, by average power generation. The full legal name of the power plant, OJSC [Open Joint-Stock Society] P. S. Neporozhny Sayano-Shushenskaya HPP [hydro power plant], refers to the Soviet-time Minister of Energy and Electrification Pyotr Neporozhny.[1] The head of the power plant is Valery Kyari.[2]
Description
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Sayano-Shushenskaya_HPS_-_generator_hall.jpg/250px-Sayano-Shushenskaya_HPS_-_generator_hall.jpg)
The plant is operated by RusHydro.[3] As of 2009, it was the largest power plant in Russia and the world's sixth-largest hydroelectric plant by average power generation. It provides more than a quarter of RusHydro's generation capacity.[4][5] The plant operated ten type РО-230/833-0-677 hydro turbines[6] manufactured at the Leningradsky Metallichesky Zavod, each with a capacity of 640 MW at 194-metre (636 ft) head.[7] The total installed capacity of the plant is 6,400 MW; its average annual production is 23.5 TWh, which peaked in 2006 at 26.8 TWh.
The station's constructions include the dam, a power plant building located near the dam, and an additional spillway which is under construction. The arch-gravity dam is 242 metres (794 ft) high. It has a crest length of 1,066 metres (3,497 ft), crest width of 25 metres (82 ft), base width of 105.7 metres (347 ft) and maximum head of 220 metres (720 ft). It consists of a solid left-bank dam 246.1 metres (807 ft) long, a power dam 331.8 metres (1,089 ft) long, a spillway dam 189.6 metres (622 ft) long and a solid right-bank dam 298.5 metres (979 ft) long.[8] It is by far the larger of only two gravity-arch dams in Russia. Water pressure for the dam is approximately 30 million tons, of which 60% is neutralized by the dam's own weight and 40% is carried to rock on the bank[9]
The dam is constructed to "safely" withstand earthquakes up to 8 on the Richter scale, and was recorded by the Guinness Book of World Records for the strongest construction of its type.[10]
The dam supports the Sayano–Shushenskoe reservoir, with a total capacity of 31.34 km3, useful capacity of 15.34 km3 and surface area of 621 km2 (240 sq mi).
Economic value
The station is the largest one contributing to peak consumption in the Unified Energy Systems of Russia. More than 70% of generated electrical power goes to Rusal's four smelters in Siberia.[11]
In years of heavy rainfall, about 1,600–2,000 GWh are lost due to lack of high-voltage line transmission capacity, and some water bypasses the turbines. To avert this, a new aluminium plant was started on 15 December 2006.
History
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/RIAN_archive_20909_Construction_of_Sayano-Shushenskaya_HPP.jpg/220px-RIAN_archive_20909_Construction_of_Sayano-Shushenskaya_HPP.jpg)
The decision to build the power station was taken in 1960. On 4 November 1961, geologists reached the area, and an exact location was chosen.[12] Construction started in 1968 and the plant was opened in 1978. It was partially reconstructed in 1987.[4] The plant was designed by the Leningrad (now Saint Petersburg) branch of the Hydroproject ([Гидропроект, Gidroproyekt] Error: {{Lang}}: text has italic markup (help)) institute, Lenhydroproject.
Following the collapse of the Soviet Union, the power plant was privatized in 1993, with RAO UES becoming the main shareholder. In April 2003, the Government of Khakassia by the initiative of the governor Alexei Lebed filed a suit to invalidate the deal.[13] In April 2004, the East Siberian Arbitration invalidated the deal; however, it was overruled by the Supreme Arbitration Court.[14]
The plant was closed after an accident on 17 August 2009. Some of the old turbines were subsequently restarted temporarily, but all are being sequentially replaced with updated more efficient equipment. As of Nov. 2014, all 10 generators are operational.[15]
Stability concerns
In 1998, the Russian Emergency Situations Ministry claimed that the "station construction [had] dangerously changed" and that the dam wall might not withstand the repeatedly increasing pressures of the annual spring floods.[16][17] Since the basement of the dam is weakened, the 30 million tons of water pressure is currently not divided 40/60 between the dam as arc supporting on the shore rocks and dam with its own weight.[clarification needed] Most of the water pressure (and probably some from the dam's own weight too) is today driven to the shore rocks since the dam is not constructed to withstand such pressure division.
There were problems with increasing water filtration through dam concrete also. In 1993 a French company "Saltenbash" impregnated dam constructions with resins after which the filtration was reduced and situation improved substantially. In later times the impregnation was repeated by Russian companies.
In 1996 the concrete was repaired on the reservoir side at levels from 344 to 388 meters[18] At the same time, the soil under the dam and supporting it from sides, was impregnated to decrease the water filtration.[18]
In 2004, BBC Monitoring quoted a Russian TV news report as saying that the dam operators had been forced to construct an extra water intake wall to alleviate the spring flood pressures.[19]
On 8 September 2009, the Accounts Chamber of the Russian Federation disclosed that the power station was audited in 2007 and that 85% of all technological equipment needed be replaced. An official notification was sent to the government and the Prosecutor General's Office.[20][21]
On 11 September 2009, RusHydro made an announcement about the dam's status, saying that the dam is not dangerous as there are around 11,000 sensors in 10 longitudinal galleries in it, and that all dam sections are under continuous monitoring.[22] According to RusHydro, displacements of the dam are both, the reversible seasonal and the irreversible. The movements have been reduced in recent years. The maximum displacement (141.5 millimetres (5.57 in)) was recorded in 2006 at dam central section No 33, which however was below the allowed maximum of 145.5 millimetres (5.73 in). According to RusHydro, the scope of displacement between the anchor legs and the machinery hall does not exceed 2.3 millimetres (0.091 in), which is less than the width between them (50 millimetres (2.0 in)), and therefore the dam cannot overwhelm the machinery hall. Also, according to RusHydro the dam is constructed for forces 2.4 times stronger than the actual forces on it are. The spillway is constructed for maximum output 13,600 m3/s, the maximum real water spill can be 7,000–7,500 m3/s as the higher spill will flood villages below the dam.[22]
Speculation
The official RusHydro assessment, however, was deemed overly optimistic by the opposition. The dam, which has no major flood control structures upstream, must bear the brunt of spring freshets, and due to a snowy winter and late thaw, in the first week of June 2010 the amount of spring flood water influx was about twice the normal (peaking at 9,700 m3/s on 5 June and expected to stay around 7,000 m3/s throughout the second and third weeks of June).[23][24] Due to the August 2009 accident, only 2 out of 10 turbines were operable and capable of routing only 690 m3/s of water.[25] Consequently, most of the water influx into the reservoir must be drained through a poorly designed spillway, which previously had already suffered extensive damage as a result of spring floods in 1985 and 1988. As of 8 June, drainage through the spillway was roughly 5,000 m3/s.[26] While it would be possible to increase the spillway drain to 7,000—7,500 m3/s, such operation was previously deemed unsafe to the structure,[27] and could result in further erosion of the dam's already weakened foundation even as the reservoir continues to fill. The damage would occur by direct impact of the falling water to the spill well (which, once its concrete slab lining were destroyed, would expose and erode the dam's bedrock support) as well as by intense vibrations created by the waterfall, which the concrete dam, lacking steel reinforcement, is not designed to withstand for prolonged periods.[28] To that date, only one section of the bypass spillway had been completed, and was capable of routing only 2,000 m3/s of water,[29] meaning that the main spillway, probably already worn and torn from the 2009 winter's heavy ice deposition on the dam, must continue to be operated for some time before repairs would be possible.
This situation has led some of the local population to petition for controlled draining of the reservoir and deconstruction of the dam, since the consequences of the dam's failure, should it occur, would be catastrophic. The resulting flood wave, which could be from 50 to 200 m high near the breach and moving at up to 200 km/h, would destroy the downstream Maynskaya HPP in a matter of minutes; the nearby town of Sayanogorsk would be flooded in under half an hour, and the heavily populated area including Abakan and Minusinsk (altogether more than 200,000 people)—within 40 minutes to several hours. After reaching the Krasnoyarskaya HPP further downstream, the flood wave would rise its reservoir by roughly 10 m and spill over its dam, destroying the power plant machinery. If that dam should fail too (the possibility of which exists in this scenario), the resulting mass of water could wash away the city of Krasnoyarsk and its suburbs, drowning or displacing their population of over 1,000,000.[28][30][31]
Accidents
1979 accident
On 23 May 1979, spring flood water entered into the machine hall and flooded the first working turbine unit. The turbine was restarted on 4 July 1979. The dam had not yet been completed.[32]
1985 accident
A powerful spring flood destroyed 80% of the concrete spillway bottom plate, tearing apart 50-millimetre (2.0 in)-thick anchor bolts and carving seven meters deep into the bedrock.[12]
1988 accident
A powerful spring flood destroyed the spillway well. As a result, working headway for the future was reduced by five meters.[12]
2009 accident
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/%D0%A1%D0%B0%D1%8F%D0%BD%D0%BE-%D0%A8%D1%83%D1%88%D0%B5%D0%BD%D1%81%D0%BA%D0%B0%D1%8F_%D0%93%D0%AD%D0%A1.jpg/250px-%D0%A1%D0%B0%D1%8F%D0%BD%D0%BE-%D0%A8%D1%83%D1%88%D0%B5%D0%BD%D1%81%D0%BA%D0%B0%D1%8F_%D0%93%D0%AD%D0%A1.jpg)
On 17 August 2009 at 8:13 AM, the hydro-electric plant suffered a catastrophic accident that caused flooding of the engine and turbine rooms, and two 711 MVA electric generators to explode underwater as a result of a short circuit. All other machinery was damaged to some extent, with only four hydro-aggregates ultimately recoverable; the remaining six required replacement.[5][33][34] As of 10 September 2012[update], 75 people, including 1 pregnant woman, were confirmed dead, while one person was still listed as missing forty days after the disaster.[35]
Power generation from the station ceased completely following the incident, with the resulting blackout in residential areas being alleviated by diverting power from other plants. Aluminium smelters in Sayanogorsk and Khakassia were completely cut off from the grid before power supplies were replaced using alternate power sources.[4][5] Russia warned that in the longer term it might lose up to 500,000 tons of aluminum output due to the power shortage, and called for accelerating the construction of the Boguchanskaya hydroelectric power station to replace lost generating capacity.[11]
The accident caused an oil spill with at least 40 tonnes of transformer oil released, spreading over 80 km (50 mi) downstream of Yenisei.[33][36]
The plant restarted operations on 24 February 2010, while repairs were complete by November 2014.[4] According to Russian Energy Minister Sergei Shmatko the rebuilding of the engine room alone would cost $1.2 billion.[11]
Dam subcontractor Gidroelectroremont's chief accountant has been accused by the Khakassia police of embezzling 24 million rubles from the funds allocated by RusHydro for repairing the dam.[37]
Official report summary
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/%D0%A0%D0%B8%D1%81._3.6.jpg/250px-%D0%A0%D0%B8%D1%81._3.6.jpg)
On 3 October 2009 the official Sayano–Shushenskaya accident report was published. In summary, it states that the accident was primarily caused by vibrations of turbine № 2 which led to fatigue damage of the turbine mountings, including its cover. The report found that at the moment of the accident, the nuts on at least 6 bolts keeping the turbine cover in place were absent. After the accident, 49 found bolts were investigated: 41 had fatigue cracks. On 8 bolts, the fatigue-damaged area exceeded 90% of the total cross-sectional area.
On the day of the accident, turbine № 2 worked as the plant's power output regulator. At 8:12 the turbine № 2 output power was reduced by an automatic turbine regulator, and it entered into a power-band unrecommended for the head pressure that day. Shortly afterwards the bolts keeping the turbine № 2 cover in place were broken. Under water pressure (about 20 atmospheres) the spinning turbine with its cover, rotor and upper parts jumped out of the casing, destroying the machinery hall equipment and building.
Pressurised water immediately flooded the rooms and continued damage to the plant. At the same time, an alarm was received at the power station's main control panel, and the power output fell to zero, resulting in a local blackout. It took 25 minutes to manually close the water gates to the other turbines; during that time they continued to spin without load.
See also
- Energy policy of Russia
- List of largest hydroelectric power stations
- List of largest power stations in the world
- List of conventional hydroelectric power stations
- List of power stations in Russia
References
- ^ Microsoft Word – RusHydro_Annual Report.doc. (PDF) . Retrieved on 2011-06-20.
- ^ "Even worse disaster was prevent in first hour after dam accident -expert". Interfax. 30 August 2009. Archived from the original on 31 August 2009. Retrieved 5 September 2009.
{{cite news}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ Stephen Bierman, Maria Kolesnikova (17 August 2009). "Six Killed as Pipes Burst at Russia's Biggest Hydropower Plant". Bloomberg. Retrieved 17 August 2009.
- ^ a b c d Antonova, Maria; Krainova, Natalya (18 August 2009). "10 Dead, 72 Missing in Dam Disaster". The Moscow Times. Retrieved 18 August 2009.
{{cite news}}
: CS1 maint: multiple names: authors list (link) - ^ a b c Ilya Naymushin (17 August 2009). "Russian dam disaster kills 10, scores missing". Reuters. Retrieved 17 August 2009.
- ^ Цхдпнрспахммне. Sshges.rushydro.ru. Retrieved on 2011-06-20.
- ^ Henry, Pierre (1992). Turbomachines hydrauliques: choix illustré de réalisations marquantes (in French). Presses polytechniques et universitaires romandes. p. 95. ISBN 978-2-88074-209-6. Retrieved 18 August 2009.
- ^ Tančev, Ljubomir (2005). Dams and appurtenant hydraulic structures. Taylor and Francis. p. 648. ISBN 978-90-5809-586-2. Retrieved 18 August 2009.
- ^ Яюъмн-Ьсьемяйюъ Цщя. Sshges.rushydro.ru. Retrieved on 2011-06-20.
- ^ В Книгу рекордов Гиннеса ГЭС просто так не заносят. Sshges.rushydro.ru. 25 March 2009. Retrieved on 2011-06-20.
- ^ a b c Vasilyeva, Nataliya (19 August 2009). "13 dead, 61 feared dead in Siberia plant explosion". Associated Press. Retrieved 20 August 2009.
- ^ a b c "Саяно-Шушенская ГЭС (Sayano–Shushenskaya HES)" (in Russian). Vesti. 17 August 2009. Retrieved 22 August 2009.
- ^ "Russia orders seizure of massive UES hydro dam". Gazeta.ru. 28 April 2004. Retrieved 18 August 2009.
- ^ "Supreme Court Presidium puts off the case on Sayano–Shushenskaya GES de-privatization for October 19". Gateway to Russia. 12 October 2004. Retrieved 18 August 2009.
- ^ "Giant Russian hydroelectric plant relaunched at full capacity after 2009 catastrophe". Nov 2014. Retrieved 2015-50-15.
{{cite news}}
: Check date values in:|accessdate=
(help) - ^ "Last forecast of emergency ministry defines Sayano–Shushenskaya power station as a potential danger". A&G Information Services. April 1998. Retrieved 18 August 2009. [dead link]
- ^ Vasilyeva, Nataliya (22 August 2009). "Report: Russian hydro plant called unsafe in 1998". Associated Press. Retrieved 20 August 2009.
- ^ a b 21 сентября 2009 г. Завершены преддекларационные обследования гидротехнических сооружений Саяно-Шушенской ГЭС. Sshges.rushydro.ru. 25 September. Retrieved on 2011-06-20.
- ^ Stafiyevskiy, Valentin (31 March 2004). "Russia's Shushenskaya hydropower dam threatened by spring floods". Asia Africa Intelligence Wire. Retrieved 18 August 2009.
- ^ "Fatal dam blast: equipment problems revealed two years ago". Russia Today. 9 September 2009. Retrieved 12 September 2009.
- ^ "Russia 'had dam disaster warning'". BBC News. 8 September 2009. Archived from the original on 11 September 2009. Retrieved 12 September 2009.
{{cite news}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ a b "Плотина Саяно-Шушенской ГЭС: общие сведения и техническое состояние (The dam of the Sayan-Shushenskaya HPP: general information and technical condition)" (Press release) (in Russian). RusHydro. 11 September 2009. Retrieved 12 September 2009.
- ^ "Приток воды на СШГЭС снизился, но остается выше нормы на 50%". Тайга.инфо. 10 June 2010. Retrieved 10 June 2010.
- ^ "Общий приток воды средний за пред. сутки Саяно-Шушенск. ГЭС". Центр Российского регистра гидротехнических сооружений и государственного водного кадастра. 15 June 2010. Retrieved 15 June 2010.
- ^ "Саяно-Шушенская ГЭС вновь увеличила сброс воды". Newslab.ru. 7 June 2010. Retrieved 10 June 2010.
- ^ "Водосброс на СШГЭС практически достиг максимума". Сибирское агенство новостей: Красноярск. 8 June 2010. Retrieved 10 June 2010.
- ^ "СШГЭС и паводок: по неизведанному пути". Плотина.Нет!. 5 June 2010. Retrieved 10 June 2010.
- ^ a b Синюков Б. П. (28 November 2009). "Саяно-Шушенский блеф. Часть I. Плотина". Журнал "Самиздат". Retrieved 10 June 2010.
- ^ "Строительство берегового водосброса Саяно-Шушенской ГЭС: Общие сведения" (Press release). RusHydro. Retrieved 13 June 2010.
- ^ Ревич Ю. (February 2010). "Дамоклово море". Журнал "Вокруг света". Retrieved 10 June 2010.
- ^ Прокопчук А. (22 November 2009). "Разрушение Саяно-Шушенской ГЭС (плотины)". LiveJournal. Retrieved 10 June 2010.
- ^ "Специалисты концерна "Силовые машины" примут участие в расследовании причин аварии на ГЭС (Specialists of the "Power Machines" will take part in the investigation of the causes of the accident at the HES)" (in Russian). ITAR-TASS. 18 August 2009. Retrieved 22 August 2009.
- ^ a b "Russia tackles Siberia oil slick". BBC News. 19 August 2009. Retrieved 20 August 2009.
- ^ Pushkin, Yuri (17 August 2009). "10 dead, 68 missing in explosion at Russian plant". CNN. Retrieved 20 August 2009.
- ^ "Body of 74th victim of HPP accident found, SKP confirms". ITAR-TASS. 4 September 2009. Retrieved 9 September 2009.
- ^ "Insulating oil spreads along Siberian river after hydro disaster". RIA Novosti. 18 August 2009. Retrieved 20 August 2009.
- ^ "Dam Subcontractor Accused of Embezzlement". Moscow Times. 1 February 2010. Retrieved 8 February 2010.
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/40px-Wikinews-logo.svg.png)
- Photos of destroyed hydro-aggregate #2 of Sayano–Shushenskaya hydroelectric station (torrent)
- Sayano–Shushenskaya hydroelectric station in Wikimapia
- Official site Template:Ru icon
- Power plant description at Lenhydroproject institute site Template:Ru icon
- Photo of Sayano–Shushenskaya Dam
- June 2009 tour of station and surroundings Template:Ru icon
- Video of the accident
- Photos before and after the 2009 accident
- Sayano–Shushenskaya Dam PhotoGallery