ECA Group and TechnicAtome partner on next-gen French nuclear subs
Rendering of the third-generation SNLE 3G SSBN for the French Navy. (Photo: Naval Group)
ECA Group and TechnicAtome are poised to implement a partnership to produce onboard electrical systems for the SNLE 3G programme to develop the third generation of French Navy nuclear-powered ballistic missile submarines (SSBNs).
The two companies announced an agreement on 4 October.
‘This is the beginning of a long partnership. We will provide power conversion solutions adapted to a demanding and constrained environment,’ said Dominique Giannoni, CEO of ECA Group.
SNLE 3G boats will replace the SNLE NG Triomphant class between the 2030s and 2040s. The programme was launched in February 2021 and will see Naval Group act as the main prime contractor in a joint venture with TechnicAtome.
Shephard Defence Insight estimates that the programme to continue the French at-sea nuclear deterrent will cost more than $35 billion.
The SNLE 3G partnership is part of a wider collaboration between TechnicAtome and ECA Group.
The latter already equips Suffren-class nuclear attack submarines in service and under construction, as well as the Triomphant-class SSBNs.
The reactors aboard nuclear-powered French submarines, including the future SNLE 3G boats, are designed by TechnicAtome.
Related Programmes in Defence Insight
Related Equipment in Defence Insight
More from Naval Warfare
-
Funding for the future US Navy Trump-class battleship sparks controversy in Congress
Lawmakers question the US Navy’s proposed $2 billion investment in the Trump-class battleship as concerns over cost, technology maturity and operational relevance fuel growing bipartisan scrutiny on Capitol Hill.
-
Germany sinks F126 frigate programme in favour of cheaper MEKO A-200
On 24 June 2026, the German Ministry of Defence announced it was cancelling the F126 frigate programme in favour of procuring eight MEKO A-200 DEU frigates.
-
UK’s Type 31 frigate balances cost pressure with long-term export ambition
The UK shipbuilder’s full-year results to the end of March revealed the impact of the £140 million charge linked to design changes and rework on the Royal Navy’s Type 31 frigate programme.
-
US Navy expands non-standard acquisitions to rapidly field emerging technologies
The US Navy is increasing the use of OTA obligations to accelerate the procurement of seabed-subsea, littoral, expeditionary and uncrewed solutions.
-
Can Portugal solve NATO’s uncrewed systems development challenge?
NATO has spent more than a decade building one of the world’s most sophisticated maritime uncrewed experimentation ecosystems, but still lacks a way to translate this testing into alliance-wide operational capability. Portugal now believes it has the answer.
-
Eurosatory 2026: Schiebel’s frigate-first strategy indicates a shift in UAV competition
Schiebel is pursuing opportunities in the UK and France while leveraging its integration with Naval Group’s FDI frigate programme to create new naval business across Europe.