The Brazilian submarine Alvaro Alberto is a nuclear-powered attack submarine (SSN) undergoing construction by the Itaguai Construcoes Navais (ICN). The construction of the submarine is part of the strategic partnership signed between France and Brazil in 2009, which also included the total transfer of technology and support for the construction of four enlarged conventionally-powered Scorpene-class submarines.
Alvaro Alberto has several similarities to its predecessor of the Scorpene class. The first Brazilian nuclear submarines will have a beam of 9.8 meters to fit in the pressurized water nuclear reactor (PWR). Its 100 meters length and 6000 tons displacement will be propelled by a 48 MW completely electric propulsion system.
The Scorpene-class submarines are a class of diesel-electric attack submarines jointly developed by the French Company Naval Group (formerly DCNS) and the Spanish company Navantia. The Scorpene class of submarines has four sub-categories including the CM-2000 conventional diesel-electric version, the AM-2000 air-independent propulsion (AIP) derivative, the downsized CA-2000 coastal submarines, and the enlarged S-BR for the Brazilian Navy, without AIP.