Welcome to


Compact nuclear reactors

TechnicAtome is specialized in design, construction, commissioning and operational maintenance of compact nuclear reactors. TechnicAtome employs approximately 1,600 employees working in the fields of naval propulsion, research and energy.

For over 45 years, it has been providing its nuclear engineering expertise for reactors, fuels and associated facilities, and offers its customers solutions and products that meet the highest standards of safety and availability.

Loïc Rocard aux Voeux 2020
A message from the


Three years after turning to a new page of its history in the service of national nuclear deterrence, 2019 was, for TechnicAtome, a key player in naval propulsion and a specialist in compact nuclear reactors, at the crossroads between the civil and the military nuclear sectors, a year full of important events, marked by very good results.

The latter part of 2018 saw the aircraft carrier Charles de Gaulle return to sea after its mid-life servicing, and the commissioning of the Cadarache onshore test reactor (RES) by TechnicAtome staff. 2019 was a landmark year for the French submarine service. The launch ceremony for the Suffren nuclear attack submarine, the first in the Barracuda programme, took place in July. The nuclear fuel was loaded in September, and the first reactor criticality was conducted by our staff on 17 December in keeping with the planned schedule. This is the second reactor, along with the RES, to be started up in 14 months, a decade after the last submarine, the Terrible, was launched at Cherbourg. 

Activity remained high for TechnicAtome in 2019, with revenues at a historically high level and a large number of new staff hired in all our engineering, operations, production and support sectors.

2020 is a year of high stakes. Strategic decisions are expected on the future new generation aircraft carrier and on the 3rd generation nuclear-powered ballistic missile submarine programme, which will help to structure TechnicAtome's future. The financial structure of the Nuward modular civil reactor programme, which entered the preliminary design phase in 2019, will be finalized in 2020.

Building on our unique expertise in nuclear propulsion, our operating results and our ongoing projects, we are keeping the momentum going in 2020 with energy and passion, serving our customers and ready for future programmes.

Chairman and Managing Director of TechnicAtome

Strategic guidelines

Our dominant activity is nuclear naval propulsion. In addition to this central pillar are complementary activities identified in the Cap TA strategic plan defined in 2018:

Nuclear naval propulsion


State-of-the-art engineering

For Civil Nuclear energy

Technical expertise

For the engineering of nuclear defence facilities
Bannière plan stratégique Cap TA

Key figures

Solid financial results, with an unprecedented level of activity in 2020 and a full order book allowing us to contemplate the future with confidence

Jean Merveilleux du Vignaux

Financial and Legal Director

400/ 0 M€
1 Billion €
A national company


Pictogramme implantations

CEA / Cadarache
Route de Vinon/Verdon
13 Saint Paul lez Durance (France)

Lieudit « Les Hautes Rives » Route de Saint Aubin 91190 Villiers le Bâcle

Centre Jean-Louis Andrieu
ZAC de Pichaury
1100, avenue Jean-René Guillibert Gautier de la Lauzière
13593 Aix-en-Provence (France)

15, avenue des Sablières
CS 60001
33116 LE BARP Cedex (France)

Technopôle ZI du Vernis 275 rue Pierre Rivoalon 29200 Brest >

Base Opérationnelle de l’Ile Longue
Appentis nord – Bassin sud
29160 Crozon (France)

BP 507
50105 Cherbourg-en-Cotentin CEDEX


Arsenal de Toulon
Quai Dupuy de Lôme
CA 58
83800 Toulon CEDEX 9

Les Salorges II
3, boulevard Salvador Allende
44000 Nantes (Nantes)