Riachuelo-class submarine

For other ships with the same name, see Brazilian ship Riachuelo.
Riachuelo at sea
Class overview
NameRiachuelo class
BuildersItaguaí Construções Navais
Operators Brazilian Navy
Preceded byTupi-class
Cost
  • US$1 billion per unit (conventional)
  • US$3.8 billion per unit (nuclear)
Built2010–present
In commission2022–present
Planned5 (1 nuclear)
Building2
Completed3
Active2
General characteristics
TypeAttack submarine
Displacement
  • Conventional: 1,900 t (1,900 long tons)
  • Nuclear: 6,000 t (5,900 long tons)
Length
  • Conventional: 70.62 m (231 ft 8 in)
  • Nuclear: 100 m (328 ft 1 in)
Beam
  • Conventional: 6.2 m (20 ft 4 in)
  • Nuclear: 9.8 m (32 ft 2 in)
Propulsion
  • Conventional:
    • 4 × MTU 12V 396 SE84 diesels 1,500 hp (1,119 kW) each
    • 1 × Jeumont-Schneider EPM Magtronic electric 3,909 hp (2,915 kW)
    • 1 × Shaft
    • Exide Hagen batteries
  • Nuclear:
    • 1 × Pressurized water reactor, 48 MW (64,000 hp), LEU 20%
    • 1 × Nuclear turbo-electric engine
    • 1 × Shaft
Speed
  • Conventional: 21 knots (39 km/h; 24 mph)
  • Nuclear: 25 knots (46 km/h; 29 mph)
Test depth400 m (1,300 ft)
Complement
  • Conventional: 32
  • Nuclear: 100
Sensors and
processing systems
  • Naval Group SUBTICS combat management system
  • Thales TSM 2233 Eledone hull and flank array passive sonar
  • Thales Safare/S-Cube hull active sonar
  • Thales DR 3000/ITT AR 900 Electronic support measures
  • Safran Series 20 target identification and classification system
Electronic warfare
& decoys
  • Naval Group Contralto-S decoy launchers
  • CANTO anti-torpedo countermeasures
Armament
NotesSources:[1][2][3][4][5]

The Riachuelo class are a Brazilian class of diesel-electric and nuclear-powered attack submarines developed by the state-owned shipyard Itaguaí Construções Navais, based on the French Scorpène-class as part of the Submarine Development Program.[6][7][8][9][10]

  1. ^ "PROSUB: NUCLEP e ICN avançam na construção do Submarino Nuclear Brasileiro" (in Portuguese). Poder Naval. 2 August 2019.
  2. ^ "Submarino Nuclear Brasileiro" (in Portuguese). Retrieved 4 August 2019.
  3. ^ Luiz Padilha (5 December 2012). "SBr – Submarino 'Riachuelo' (S-40)". Defesa Aérea & Naval. Retrieved 5 December 2020.
  4. ^ "Programa Nuclear da Marinha" (in Portuguese). Retrieved 3 August 2019.
  5. ^ Joao Paulo Zeitoun Moralez (2 September 2021). "La Marina de Brasil incorpora el primer submarino de la Clase Riachuelo". Pucara Defensa.
  6. ^ "Itaguaí Construções Navais comemora dez anos de atividades" (in Portuguese). Brazilian Navy. Retrieved 24 May 2021.
  7. ^ "O Prosub e o submarino nuclear brasileiro SN-BR" [The PROSUB and the Brazilian nuclear submarine SN-BR]. Poder Naval. 20 February 2018.
  8. ^ "DECRETO Nº 8.630, DE 30 DE DEZEMBRO DE 2015". Brazil Gov. 30 December 2008. Retrieved 25 January 2022.
  9. ^ Nicolas von Kospot (2 June 2010). "First Steel Cut for Brazilian Submarine Programme". www.defpro.com. Archived from the original on July 17, 2011. Retrieved 7 June 2010.
  10. ^ "Submarino "Riachuelo" reforça a soberania do País na Amazônia Azul". Brazilian Navy (in Portuguese). 1 September 2022.