Engineering:Riachuelo-class submarine

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Short description: Brazilian class of submarines
For other ships with the same name, see Brazilian ship Riachuelo.
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The Riachuelo class are a Brazilian class of diesel-electric and nuclear-powered attack submarines developed by the state-owned shipyard Itaguaí Construções Navais (ICN), based on the French Script error: The function "sclass" does not exist. as part of the Submarine Development Program.[1][2][3][4][5]

History

In 2008, the Presidents of Brazil and France, Luiz Inácio Lula da Silva and Nicolas Sarkozy, signed a strategic partnership to the construction of four conventionally-powered submarines, and the support for the development of the first Brazilian nuclear submarine, in a program called PROSUB.[6][2]

The project was initiated in 2010 with the Madeira Island base in Rio de Janeiro as the submarine development and manufacturing point. Between 2010 and 2012, a group of 31 engineers, 25 officers and 6 civil employees, received theoretical training by the DCNS in Cherbourg, France. In 2018, more than 400 Brazilian engineers worked only on the nuclear submarine project staff, originally formed by the group that received training in France.[2][7] The first stage of construction of the conventionally-powered Riachuelo took place in France, with the cutting of the first steel plates of the structure. At this point, technology transfer from French technicians to Brazilians began.[8][9]

The conventional Brazilian boats are larger in length, tonnage and cargo capacity compared to the French Scorpène class they are derived from. The Brazilian version are 70.62 m (231 ft 8 in) and 1,900 tons, compared to the original Scorpènes that are 61.7 m (202 ft 5 in) and 1,565 tons.[10]

Nuclear submarine

As part of the program, a fifth submarine, named Álvaro Alberto, will be powered by nuclear propulsion. This unit has many similarities to its diesel powered predecessors of the Riachuelo class. The first Brazilian nuclear submarine will have a beam of 9.8 m (32 ft 2 in) to accommodate the pressurized water nuclear reactor (PWR).[11] Its 100 m (330 ft) length and 6,000-ton displacement will be propelled by a 48 MW (64,000 hp) fully-electric propulsion system.[12] Once the vessel is completed no fuel imports are needed as all fuel required for the life cycle is included in the reactor.

Boats

The names of the conventional boats were selected to represent key Imperial Brazilian Navy's military operations during the Paraguayan War and the Platine War, and former Admiral Alfredo Karam. The nuclear boat honors the former Vice Admiral and scientist Álvaro Alberto da Motta e Silva.[13]

Name Hull no. Launched Commissioned Status
 Brazilian Navy
Riachuelo class
Diesel-electric
missing name S40 14 Dec 2018[14] 1 Sep 2022[15] Active
missing name S41 11 Dec 2020[16] 12 Jan 2024[17] Active
missing name S42 27 Mar 2024[18] 26 Nov 2025[19] Active
missing name S43 26 Nov 2025[19] 2026[20] Sea trials[20]
Nuclear
Álvaro Alberto SN10 2029[21] 2032-2034[22][23] Under construction[20]
  Planned date

See also

  • History of submarines
  • Brazilian Submarine Force Command
  • Future of the Brazilian Armed Forces
  • Script error: The function "sclass" does not exist.s

References

  1. ↑ "Itaguaí Construções Navais comemora dez anos de atividades" (in pt). Brazilian Navy. https://www.marinha.mil.br/dgdntm/node/180. Retrieved 24 May 2021. 
  2. ↑ 2.0 2.1 2.2 "O Prosub e o submarino nuclear brasileiro SN-BR". 20 February 2018. https://www.naval.com.br/blog/2018/02/20/o-prosub-e-o-submarino-nuclear-brasileiro-sn-br/. 
  3. ↑ "DECRETO Nº 8.630, DE 30 DE DEZEMBRO DE 2015". Brazil Gov. 30 December 2008. http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2015/decreto/D8630.htm. 
  4. ↑ Nicolas von Kospot (2 June 2010). "First Steel Cut for Brazilian Submarine Programme". www.defpro.com. http://www.defpro.com/daily/details/585/. 
  5. ↑ "Submarino "Riachuelo" reforça a soberania do País na Amazônia Azul" (in pt). 1 September 2022. https://www.marinha.mil.br/agenciadenoticias/submarino-riachuelo-reforca-soberania-do-pais-na-amazonia-azul. 
  6. ↑ "Base de submarino nuclear começará a ser construída em fevereiro" (in pt). Terra. 30 January 2010. http://noticias.terra.com.br/brasil/base-de-submarino-nuclear-comecara-a-ser-construida-em-fevereiro,f4a84bc92690b310VgnCLD200000bbcceb0aRCRD.html. 
  7. ↑ "O Prosub" (in pt). https://www.marinha.mil.br/prosub/institucional. Retrieved 3 August 2019. 
  8. ↑ "Marinha do Brasil PROSUB" (in pt). https://www1.mar.mil.br/prosub/construcao. 
  9. ↑ "NUCLEP na Cerimônia de Integração dos Submarinos Classe Riachuelo" (in pt). 20 February 2018. https://tecnodefesa.com.br/nuclep-na-cerimonia-de-integracao-dos-submarinos-classe-riachuelo. 
  10. ↑ "Diferenças entre o submarino Scorpène e o S-BR brasileiro" (in pt). 7 December 2018. https://www.naval.com.br/blog/2018/12/07/diferencas-entre-o-submarino-scorpene-e-o-s-br-brasileiro. 
  11. ↑ "Programa Nuclear da Marinha" (in pt). Brazilian Navy. https://www.marinha.mil.br/ctmsp/programa-nuclear-da-marinha. 
  12. ↑ "Submarino Nuclear Brasileiro Alvaro Alberto (SN 10)" (in pt). Defesa Aérea & Naval. 7 December 2012. https://www.defesaaereanaval.com.br/ciencia-e-tecnologia/submarino-nuclear-brasileiro-alvaro-alberto-sn-10. 
  13. ↑ "O Prosub e o submarino nuclear brasileiro SN-BR". 20 February 2018. https://www.naval.com.br/blog/2018/02/20/o-prosub-e-o-submarino-nuclear-brasileiro-sn-br/. 
  14. ↑ "Brazil launches first of 5 navy attack submarines". EFE. 14 December 2018. https://www.efe.com/efe/english/world/brazil-launches-first-of-5-navy-attack-submarines/50000262-3843389. 
  15. ↑ "Submarino "Riachuelo" reforça a soberania do País na Amazônia Azul" (in pt). 1 September 2022. https://www.marinha.mil.br/agenciadenoticias/submarino-riachuelo-reforca-soberania-do-pais-na-amazonia-azul. 
  16. ↑ "Bolsonaro encabeza la botadura de otro submarino construido por Brasil y Francia". EFE. 11 December 2020. https://www.efe.com/efe/america/portada/bolsonaro-encabeza-la-botadura-de-otro-submarino-construido-por-brasil-y-francia/20000064-4417229. 
  17. ↑ "VÍDEO: Cerimônia de Mostra de Armamento do Submarino ‘Humaitá’ – S41" (in pt). Poder Naval. 12 January 2024. https://www.naval.com.br/blog/2024/01/12/video-cerimonia-de-mostra-de-armamento-do-submarino-humaita-s41/. 
  18. ↑ "Tonelero: saiba como é o submarino lançado por Lula e Macron no RJ". G1. 27 March 2024. https://g1.globo.com/rj/rio-de-janeiro/noticia/2024/03/27/tonelero-saiba-como-e-o-submarino-que-sera-lancado-por-lula-e-macron-no-rj.ghtml. 
  19. ↑ 19.0 19.1 "Marinha recebe o 3º e submarino convencional, lança o 4º e faz a transição para construir o nuclear" (in pt). 26 November 2025. https://www.estadao.com.br/politica/marcelo-godoy/marinha-recebe-o-3-e-submarino-convencional-lanca-o-4-e-faz-a-transicao-para-construir-o-nuclear/. 
  20. ↑ 20.0 20.1 20.2 "La Marina de Brasil ya está lista para poner a flote al cuarto de sus nuevos submarinos de ataque clase Riachuelo" (in es). 25 November 2025. https://www.zona-militar.com/2025/11/25/la-marina-de-brasil-ya-esta-lista-para-poner-a-flote-al-cuarto-de-sus-nuevos-submarinos-de-ataque-clase-riachuelo/. 
  21. ↑ "PROSUB" (in pt). https://www.marinha.mil.br/programas-estrategicos/prosub. 
  22. ↑ "La Marina de Brasil se alista para iniciar la construcción del submarino nuclear Álvaro Alberto en el año 2025" (in es). https://www.zona-militar.com/2024/06/25/la-marina-de-brasil-se-alista-para-iniciar-la-construccion-del-submarino-nuclear-alvaro-alberto-en-el-ano-2025/. 
  23. ↑ "Brazilian SSN Alvaro Alberto to be commissioned in 2034". 4 June 2021. https://www.navyrecognition.com/index.php/naval-news/naval-news-archive/2021/june/10251-brazilian-ssn-alvaro-alberto-to-be-commissioned-in-2034.html. 

Template:Brazilian Scorpène class submarines Template:Scorpène class submarine Template:Ship classes of the Brazilian Navy



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