See Guanabara Bay
(Baia de Guanabara) to the right of central Rio. Guanabara Bay is the home of
Brazil's current submarine base. To the left of Rio is Sepetiba Bay (Baia de
Sepetiba). Brazil's new submarine base-shipyard complex at Port Itaguaí, 80 km west of Rio. The creation of the new base is due to base growth, environmental and population
concerns including dangers from stored ammunition and the remote possibility of nuclear
reactor leakage.
Brazil's Future
Submarine Program (ProSub) Comparison with Australia's
Brazil's decision to build its own
submarines is, of course, relevant to the
submarine building aspirations of many in Australia. Australia's experience in the 1980s and 90s was similar in that it built its current submarines, the Collins, in Australia just as Brazil built its current Tupi class, in Brazil. A difference now is that Australia aims to have its new submarines built overseas while Brazil is building its Scorpenes in Brazil.
Another difference from Australian is that the fifth and
last Brazilian submarine will be nuclear propelled - known as
SN-BR. Going nuclear propelled is a major financial and technical risk for Brazil. A roughly comparable case is
India's development of its indigenously built INS Arihant. Arihant has been developed with probably closer Russian support than France intends for Brazil. Still India has found that Arihant's reactor has been more problematic than expected with consequent delays in fully running the reactor.
India's experience is also a reminder to Australia that if Australia wanted nuclear propulsion it is probably best for Australia to buy or "lease" complete SSNs from the US rather than evolving indigenous solutions. Arihant is unlikely to be India's last developmental submarine. SN-BR may not be Brazil's last. If SN-BR is based on France's
Rubis-Amethyste class SSN that may save Brazil much time and cost. Still much depends on foreign policy outlook. Brazil and India are basically non-aligned while Australia is very dependent on and aligned with the US.
A further difference between Brazil and Australia is that Brazil is pursuing a lower (conventional Scorpene) and high (SN-BR) capability strategy while Australia has restricted itself to a "medium" strategy of an unusually capable conventional submarine.
A similarity between Australia and Brazil is the need to move the submarine base. Australia moved its submarines from (
HMAS Platypus) in Sydney from the 1980s to
HMAS Stirling (Rockingham, Western Australia). There were several reasons for Australia's decision including the desire to host nuclear submarines of Australia's allies away from a (or the) major city. Implicitly Rockingham also offered the option of being the base for Australian nuclear submarines.
Returning to Brazil - Port Itaguaí shipyard and base is being constructed by the Sociedade de Proposito Especifico (SPE) consortium, which includes Brazil’s Odebrecht (50%), France’s DCNS (49%) and the Brazilian Navy (1% “golden share,” with veto power).
There are many question marks (?) that follow due to language differences, repetition in official sources and much old information in secondary sources. In French and Portuguese Submarine Program is reversed to Program Submarine, hence ProSub. With base-shipbuilding facilities now (fully?) established actual submarine building has commenced.
Brazil's new Conventional Submarines
Four
of the five new submarines will be enlarged (75 m
long, 2000 tons displacement) Scorpenes of DCNS
design "CM-2000" and ProSub designation "S-Br". Brazil's Scorpenes may well have a crew of up to 45 and 18 torpedos or missiles. It is unclear whether
these Scorpenes will have AIP(?). The hull of
the first Scorpene (Riachuelo) was laid down at Cherbourg, France on 27 May 2010 and flown in prefabricated
sections ("jumboized") by Airbus to Brazil in late
2012. Sections (including steel fabrication) for the next three
Scorpenes are being made in Brazil.
No.
Name
Laid
down Launched Commissioned Based
S40
Riachuelo
27 May 2010 maybe
2018 maybe
2019 Itaguai, Sepetiba Bay
S41
Humaitá
1 Sept 2013
maybe 2020 maybe
2021 Itaguai, Sepetiba Bay
S42
Tonelero
maybe 2015 maybe
2021 maybe
2022 Itaguai, Sepetiba Bay
S43
Angostura
maybe 2017 maybe 2022 maybe
2023 Itaguai, Sepetiba Bay
Brazilian Nuclear Submarine (SN-BR)
Due
to non-proliferation and broader political sensitivities DCNS and Brazil
claim that DCNS will not actually help Brazil place the reactor in SN-BR. This
claim may be somewhat disputed due to the reactor being of partly
French design and SN-BR perhaps being based on the French Barracuda SSN. Training of
some Brazilian crew on French SSNs is likely - on Rubis-Amethyste SSNs
and/or Barracudas.
No.
Name
Laid down
Launched Commissioned Based
SN10
Álvaro Alberto maybe 2023 maybe 2030 maybe 2035 Itaguai,
Sepetiba Bay
Brazil
has medium-long term plans for 5-6 further SSNs if Álvaro Alberto is
successful.
There
currently appears to be expectations that SN-BR will be around 100m long and 9m
wide. This coincides with France's Barracuda SSN dimensions
of: 99.5m long and beam: 8.8m. The Barracuda ,
when launched around 2018-19 will be 4,765 tons (surfaced) and
5,300 tons (submerged). Therefore the future SN-BR may have a similar
displacement when launched around 2030. The broader Brazilian
nuclear submarine program involves Brazil's aim to fully enrich and shaping
uranium for placement in the submarine reactor.
In 1979 the Brazilian military government of the day created a secret program to develop a complete nuclear fuel cycle outside international safeguards. Under the Brazilian navy’s special projects commission (COPESP)
, the program initially focused on developing a small light-water reactor for submarine propulsion and an indigenous uranium-enrichment capability using gas centrifuges. COPESP began construction of a pilot enrichment plant at the Aramar Experimental Center in Iperó (São Paulo state)
in 1987. At the inauguration of the plant, authorities said the facility would produce low-enriched uranium (5 percent enrichment) for existing power and research reactors and for nuclear submarine reactors. [Pete's Comment - 5% enriched Uranium seems very low energy intensity for a submarine reactor. 5% may have been a notional figure to satisfy non-proliferation regulators if the program was exposed.]
Under the 1991 Brazilian-Argentine
peaceful use of nuclear energy "Guadalajara" Agreement. Article III states that “none of the provisions of the present Agreement shall
limit the right of the Parties to use nuclear energy for the propulsion of any
type of vehicle, including submarines, since propulsion is a peaceful
application of nuclear energy."
From around 2010 the
currently proposed(?) reactor is known as 2131-R Pressurized Water Reactor (PWR). France
assisted in the reactor design, but the reactor itself will be
built in Brazil (?). An earlier NTI article (first paragraph) talked of land-based
test reactor RENAP-11 (of 11 MW), which may not yet have
been developed. The submarine reactor itself may be of 48 MW noting that the French Rubis-Amethyste class SSN used a PWR reactor known as the K48 with an output of 48 MW. The Rubis weighs 2,400 tons (surfaced). At the upper end of the French scale the Barracuda SSN of 5,000 tons will have a 150 MW reactor. 150 MW would be very ambitious for a first generation indigenous submarine - noting
India's INS Arihant publically relies on a 83 MW reactor.
Brazil
has probably gone beyond the following description. Currently, Brazil mines and
perhaps buys some uranium, converts it into yellowcake. The yellowcake
is shipped from Brazil to Canada for enrichment using
the hexafluoride gas method. The gas (?) is then shipped to Europe
for enrichment by the US-UK-Dutch-German Urenco Group.
In December 2014
it was reported "A demonstration plant was built
at the Aramar Experimental Center in Iperó (São Paulo state), which remains a
naval facility to provide fuel enriched [by hexafluoride gas cascade] to less
than 20% for the submarine program. Currently enrichment here is reported
to be to 5% U-235." "less than 20%" enriched is stated
because more than 20% enriched is considered Highly
Enriched Uranium (HEU) which is considered a heightened
nuclear proliferation concern. Brazil and France do not want to push
things by venturing into political pressures
from non-nuclear neighbours or from legal nuclear weapon states like
Russia and the US.
Artist's impression of Brazil's new Submarine Program (ProSub) Base and Shipbuilding facility at Port Itaguai,
Sepetiba Bay. Brazil's decision to build its own submarines of French-DCNS designs is, of course relevant, to the
submarine building aspirations of many in Australia.
The nuclear submarine project, because of the dual-use nature of its reactor
development and uranium enrichment, has been touted as holding the promise of
enhancing both civilian and military exports.
Nuclear propulsion also contributes to Brazil's great power aspirations - short
of actually building nuclear weapons.
Sources
The following sources are useful although there
is much repetition and it is unclear what is old and what is current
information. Therefore there are many question marks (?). Comments from
Brazilian readers are welcome to fill in the blanks :)
The website http://www.defesanet.com.br/prosub/ contains a wealth of updates on ProSub.
http://www.defenseindustrydaily.com/brazil-france-in-deal-for-ssks-ssn-05217/
Drawn from USNI http://www.usni.org/magazines/proceedings/2009-06/why-does-brazil-need-nuclear-submarines
Pete
