Angra Nuclear Power Plant

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Angra Nuclear Power Plant
Angra dos Reis - usinas nucleares.jpg
Angra Nuclear Power Plant
Coordinates23°00′30″S 44°27′26″W / 23.00833°S 44.45722°W / -23.00833; -44.45722Coordinates: 23°00′30″S 44°27′26″W / 23.00833°S 44.45722°W / -23.00833; -44.45722
Construction began1971
Commission date1 January 1985
Operator(s)Eletrobrás Termonuclear S.A. - Eletronuclear
Cooling sourceSouth Atlantic Ocean
Thermal capacity1 × 1882 MWth
1 × 3764 MWth
Power generation
Units operational1 × 640 MW (gross)
1 × 1350 MW (gross)
Units under const.1 × 1405 MW (gross)
Nameplate capacity1884 MW
Capacity factor88.4% (2014-2018)
Annual net output14,593 GW·h
External links
CommonsRelated media on Commons

Angra Nuclear Power Plant is Brazil's only nuclear power plant. It is located at the Central Nuclear Almirante Álvaro Alberto (CNAAA) on the Itaorna Beach in Angra dos Reis, Rio de Janeiro, Brazil. It consists of two Pressurized water reactors, Angra I, with a net output of 609 MWe,[1] first connected to the power grid in 1985[2] and Angra II, with a net output of 1,275 MWe,[3] connected in 2000.

Work on a third reactor, Angra III, with a projected output of 1,245 MWe,[4] began in 1984 but was halted in 1986. Work started again on 1 June 2010 for entry into service in 2015 and later delayed into the 2020s.[5][6] A further restart awaits outside investment.

Existing complex[edit]

The Central Nuclear Almirante Álvaro Alberto complex is administrated by Eletronuclear, a state company with the monopoly in nuclear power generation in Brazil. The complex employs some 3,000 people and generates another 10,000 indirect jobs in Rio de Janeiro state.

Angra I was purchased from Westinghouse of the USA (its sister power plant is Krško Nuclear Power Plant in Slovenia[7]). The balance of plant design was subcontracted to Gibbs and Hill (USA) in association with PROMON Engenharia S.A. and construction to Brasileira de Engenharia S.A.[2]

The purchase did not include the transfer of sensitive reactor technology. As a result, Angra II was built with German technology, as part of a comprehensive nuclear agreement between Brazil and West Germany signed by President Ernesto Geisel in 1975. The complex was designed to have three PWR units with a total output of around 3,000 MWe and was to be the first of 4 nuclear plants that would be built up to 1990.


The plant has two pressurized water reactors, with a total net capacity of 1,884 MWe. Its units are rated as follows:

  • Angra 1: 640 MWe
  • Angra 2: 1275 MWe
  • Angra 3: 1405 MWe[8]

Future developments[edit]

Construction site Angra III in May 2015

The development of Angra III began in 1984 as a Siemens/KWU pressurized water reactor but was halted in 1986. About 70% of the plant's equipment was purchased in 1985 but has been in storage ever since. In June 2007, restarting of work on was approved by the National Council for Energy Policy. President Luiz Inácio Lula da Silva greenlit the project in July 2007. On December 2008, Eletronuclear signed an industrial cooperation agreement with Areva. On 31 May 2010, the National Nuclear Energy Commission granted a licence for construction of the third reactor. Construction of the reactor, which has a capacity of 1,350 MWe, begun on 1 June 2010 and was predicted to be operational by 2018.[5][9]

After stopping construction in 2014, the Brazilian government have decided to auction off the incomplete power station to private investors in 2018. Based on that timetable and the volume of construction works to complete, the Energy deputy minister expects completion to be achieved by 2023. [10]

On November 2021, the Brazilian government rescheduled the conclusion of Angra III for 2026-27, and announced the construction of a fourth nuclear power plant, to be inaugurated in 2031.[11][12]

See also[edit]


  1. ^ "Eletronuclear - Informações Angra 1". Archived from the original on 2014-05-07. Retrieved 2013-01-04.
  2. ^ a b "Second National Report of Brazil, Nuclear Installations" (PDF). IAEA. Retrieved 2015-04-24.
  3. ^ "Informações Angra 2". Archived from the original on 2014-09-16. Retrieved 2013-01-04.
  4. ^ "Eletronuclear - Angra 3". Archived from the original on 2014-03-07. Retrieved 2013-01-04.
  5. ^ a b Power Reactor Information System of the IAEA: "Brazil, Federative Republic of : Nuclear Power Reactors"
  6. ^ ""Eletronuclear - Obras civis de Angra 3 voltarão ao ritmo normal"". Archived from the original on 2014-09-16. Retrieved 2014-09-16.
  7. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-10-04. Retrieved 2009-07-17.{{cite web}}: CS1 maint: archived copy as title (link)
  8. ^ "Central Nuclear Almirante Álvaro Alberto - Angra 3". Eletrobras. Retrieved 9 November 2021.
  9. ^ "Angra 3 construction". World Nuclear News. 2010-06-02. Retrieved 2010-06-18.
  10. ^ "Brazil's Angra III nuclear project to be auctioned by 2018 -deputy minister". Reuters. 2017-03-22. Retrieved 2017-07-21.
  11. ^ "De vilã a fonte verde: Brasil retoma projeto de energia nuclear". CNN Brazil. 9 November 2021.
  12. ^ "Governo prepara nova usina nuclear, mas ainda não retomou obras de Angra 3". IG. 9 November 2021.

External links[edit]