Development and production of 6 on-board nuclear steam supply systems for the new generation of nuclear-powered attack submarines and their support system

©Marine Nationale

Barracuda Programme

The first ship of the « Le Suffren » series, was delivered to the French Navy in November 2020 and successfully accepted into service in June 2022.The nuclear reactor of the second submarine, le Duguay-Trouin, was commissioned in September 2022.

Main services

  • Development of the submarine nuclear steam supply system: design and dimensioning studies, layout of installations, definition and qualification of steam supply system equipment
  • Safety studies and production of official documentation to obtain operating authorizations (in particular the safety report)
  • Manufacture of the steam supply systems for the 6 submarines: procurement of equipment, assembly of steam supply systems, I & C and start-up tests
  • Development and manufacture of the support system including the tooling for loading and unloading the core and the training platforms for training Marine personnel

©Naval Group

© Marine Nationale

Main stages:

  • January 2007 : Launch and construction of Barracuda-type submarines
  • August 2012 : Steam supply system pre-assembled in-factory on the Nantes-Indret site delivered by sea to Cherbourg
  • July 2013 : Nuclear steam supply system closed up, after integration into the hull section in late 2012
  • 2015-2018 : Installation and tests of the I&C of the steam supply system and overall steam supply system tests
  • December 17, 2019 : 1st commissioning of the Suffren
  • 2020 : Sea test
  • November 6, 2020 : The Suffren officially delivered to the French Navy
  • September 30, 2022 : 1st commissioning of the Duguay-Trouin