Omexom Nuclear Projects

Implantation

Omexom Nuclear Projects

Contact

52-58 av. Jean Jaurès, 92700 Colombes

Other locations :
Bâtiment Le SUNWAY
257-259 Av. Jean Jaurès, 69007 Lyon

ISDEL ENERGY LIMITED (a Vinci Energies company)
160 Aztec West, Park Avenue,
Almondsbury, Bristol BS32 4TU, UK

Contact us

Who we are ?

Omexom Nuclear Projects (ONP) is the business unit of the Nuclear Division of Vinci Energies dedicated to the electrical installations of the EPR, EDF’s Nuclear new build program.
Our vocation is to design and build the electrical installations of these new Nuclear Power Plants in accordance with the required quality and nuclear safety standards.
The business unit is based in Colombes, close to Paris, but can also rely on its locations in Lyon and Bristol (UK) to address our international projects.

The business unit has been involved in nuclear projects for more than 15 years now. After the finalizations on the Flamanville EPR and the ramp-up on the HPC project (2 units at Hinkley Point C in the United Kingdom), the path for Omexom Nuclear Projects promises to be just as exciting in the years to come: Nuclear new build projects are being implemented (EPR2, Sizewell C in the UK) and ONP will be there to support them! By putting in the forefront our women and men as well as Nuclear Safety!

LEPINAY Guillaume BU Manager

Key figures

collaborators

M€

Turnover

years

of expertise

Major references

Flamanville EPR, Hinkley Point C EPR (UK), Activated waste conditioning and storage facility (ICEDA)

Our expertises

Our engineering specialities are:
- High & low voltage – single line diagrams, sizing, technical specifications
- Installation of equipment and cable trays & cable routing (IEG & IED)
- Seismic stress resistance calculations (supports, etc.)
- Design & manufacturing of electrical cabinets & boxes
- K3 qualification of equipment
- Fire detection (JDT), CCTV/PA, access control, lighting (IED)
- Instrumentation & Control’s – architectures, functional analyses, specifications
The business unit also has strong expertise in Site Management & Construction:
- Logistics
- Sourcing
- Sub-contractors management
- Scheduling
- Co-activity management

Our jobs

Project Director,
Project Manager,
Project Controls Manager,
Design Engineer, CAD Designer,
Planning Engineer,
Construction Manager,
QHSSE Manager,
Tender Engineer, etc.

Join us by applying directly on jobs.vinci.com and following us on LinkedIn.

Join us!

YR5301 – IEG FA3 (Flamanville 3) EPC contract (including K3 qualification)

– 2.500 drawings, specifications & other documents
– 150km of cable trays
– 2.200km of cables
– 63.000 terminations
– 3.000 cabinets & boxes
– 5 turnkey systems
> 1.000.000 engineering manhours
> 5.500.000 site manhours

ICEDA

Control systems, supervision of waste container handling
Engineering and installation of cable trays and seismic supports
Design and installation of electrical cabinets according to nuclear requirements
Radiation protection studies
Fire detection system, communication, video surveillance, access control (C2 EVEREST detection gate, CPO SMART, etc)…

HK5301.01 – IEG HPC Manufacturing & execution design

Scope :Design, qualification & support to site activities

– 200km of cable trays

– 60.000 supports

– Earthing & bonding

– Pre design for electrical cabinets & boxes

– Turnkey systems (KSC, LYS, LAI)

> 360.000 manhours at 2022 end

290.000 engineering manhours

70.000 project controls, quality & project management manhours

HQSE

Nuclear safety : ISO 19443
Quality : ISO 9001
H&S : ISO 45001
Fire detection : APSAD I7
Radiation protection : certification Qualianor
Qualified by UTO (EDF supply chain management)
CSR (Corporate social responsibility) : Afnor ISO 26000

23/10/2025 Finland, Overhead transmission lines

Omexom Network Powers Cross-Border Collaboration in Järvilinja 1 (Lake Line) Transmission Project in Finland

Omexom in Finland, in partnership with Omexom in France, is advancing the Järvilinja 1 (Lake Line) transmission project for Fingrid, Finland’s national grid operator.

17/10/2025 Electric mobility, Energy Transition, Germany

Omexom Delivers Cutting-Edge Electric Bus Charging Infrastructure at Stuttgart’s New SSB Depot for Daimler Buses Solutions

On behalf of Daimler Buses Solutions, Omexom in Germany successfully installed a cutting-edge electric bus charging system at the new Gaisburg bus depot in Stuttgart, Germany jointly with Stuttgarter Straßenbahnen AG (SSB). This project represents a significant step forward in promoting climate-neutral transportation.

09/10/2025 Substations, Sweden

Omexom Breaks Ground on Sweden’s First Wooden Transformer Station in Karlshammar

On September 24, Omexom and E.ON marked a milestone in sustainable energy infrastructure with the groundbreaking of Sweden’s first transformer station primarily constructed from wood, located in Karlshammar in Mönsterås municipality.

03/10/2025 New Zealand, Outdoor lighting, Territories

Omexom New Zealand Starts Four-Year Auckland Transport Streetlight Maintenance and Renewals Contract

Omexom in New Zealand has been awarded a multifaceted Streetlight Maintenance and Renewals Contract for the Northern area by Auckland Transport. This new contract covers maintenance, renewals, and capital projects.

24/09/2025 Power, Solar, USA

Gillespie-B1.9 Solar Project Now Energized, Delivering Clean Power to Fayetteville Homes

Booth and Associates, part of the Omexom network in the USA, has achieved a major milestone in its renewable energy efforts with the successful energization of the Gillespie-B1.9 project, a 1.9 MW distribution-generated solar initiative located in Fayetteville, North Carolina.

17/09/2025 Cameroon, Territories

Omexom Cameroon and City of Yaoundé Launch Smart Solar Lighting Project for a Sustainable Future

Omexom Cameroon, in close partnership with the Urban Community of Yaoundé (CUY), officially launched a pilot renewable energy project to modernize the city’s public lighting system. This ambitious initiative marks a major step forward in Cameroon’s energy transition, combining solar power, smart grid technology, and energy storage to enhance sustainability and urban resilience.

11/09/2025 Energy Transition, Substations, Substations, UK & ROI, Germany, Norway

SF₆-Free Substations: Omexom Business Units Implement Sustainable Innovations for a Greener Grid

As the demand for clean energy grows, the electrical infrastructure industry is embracing innovative solutions to reduce emissions. SF₆, a widely used greenhouse gas in electrical switchgears at substations, is under scrutiny due to its exceptionally high global warming potential (GWP), more than 24,300 to 25,200 times (*IPCC AR6 data) that of CO₂.

15/02/2024 Norway

Norway: Otera AS celebrates rebranding, joins Omexom network

On February 2, Omexom in Norway welcomed close to 300 new colleagues with a rebranding event spread in the locations of Kristiansand, Lyngdal, Evje and Møre.

30/10/2023 Overhead transmission lines, Substations, Sweden

Omexom in Sweden starts construction on three major projects, marks milestone in collaboration with both TSOs and DSOs

The Omexom business unit in Sundsvall has secured three new contracts with a total order amount of €70 million. Building on long-standing partnerships with clients Svenska kraftnät and Sundsvall Elnät AB, the projects include the reconstruction and new construction of Odensala which is the largest air-insulated switchgear in Sweden so far.

21/08/2023 Environment, Sweden, Underground distribution lines

Omexom in Sweden reduces environmental impact in distribution project

‘Groundbreaking’ takes on a new meaning at an underground distribution site for Omexom in Sweden: the business unit and its project partners have inherently redesigned the project to adopt a comprehensive environmental approach.

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