Ortec, committed to nuclear power today and tomorrow
For over 40 years, Ortec has been supporting major players in the nuclear sector in both France and abroad. This long-standing partnership with major industry players has enabled the Group to develop expertise spanning the entire nuclear industry value chain. We apply our expertise at every stage of a project’s life cycle, from design and construction through to facility operation and maintenance.
Ortec ensures the quality, productivity, and repeatability of operations, while guaranteeing occupational safety, radiation protection, and the nuclear safety of facilities. This comprehensive expertise positions the Group as a key partner for the nuclear industry of tomorrow, including EPR2 and SMR projects as well as other major upcoming projects in the sector.
A key partner for the nuclear sector
From design to execution and maintenance, Ortec supports nuclear companies at every stage of their projects. This continuity allows the Group to draw on complementary areas of expertise, both to meet the operational and maintenance needs of the existing infrastructure and to contribute to the design and construction of new facilities. This approach makes particular sense in an industry where planning spans decades, and where the experience gained from today’s facilities informs future projects. Ortec is firmly involved in the challenges facing both existing and future nuclear facilities.
Ranked among the top 3 French nuclear engineering firms
Tier-1 supplier in metallurgy and nuclear construction
Specialist in nuclear maintenance and cleaning.
Our expertise to boost the performance of nuclear projects
From design engineering to construction and maintenance, Ortec draws on complementary areas of expertise to support nuclear projects at every stage. Our teams share the same high standards and a common goal: the safety of facilities and the operational performance of projects.
Nuclear engineering: Designing and ensuring the safety of your facilities
Technical engineering is one of the Ortec Group’s long-standing core businesses, and it is only natural that we have been applying this expertise to the nuclear industry for three decades. From the maintenance of existing infrastructure to the engineering of EPR2 projects, from the design of fuel cycle equipment to the decommissioning of research facilities, our engineering teams combine in-depth knowledge of the sector’s industrial challenges with a hands-on approach developed in the field. This synergy enables us to design, scale and ensure the safety of nuclear facilities by incorporating operational realities and performance requirements right from the beginning of the design phase.
- Design Engineering: As the cornerstone of our nuclear engineering expertise, this discipline draws on complementary skills to design and scale facilities: calculations, plant layout, mechanical engineering, electrical engineering, civil engineering/road and utility networks, HVAC, fluid systems, and hydraulics.
- Project Management: Our teams organize and manage major projects by making use of proven methods: systems engineering, QCD management, PMO, and contract management.
- Data Management: Our expertise in data engineering enables us to organize, ensure the reliability of, and facilitate the use of data: technical documentation, configuration management, electronic document management (EDM), administrative engineering, and digital continuity.
- Construction & Maintenance Engineering: Our teams prepare, monitor, and ensure the safety of operations through expertise in methods, maintenance, manufacturing monitoring and testing, QHSE, decommissioning, and waste management.
- Risk management: our teams are involved in all aspects of nuclear safety, radiation protection, fires/explosions, dependability, the environment and organizational and human factors.
Nuclear Engineering References
With a broad range of engineering expertise—particularly in structural analysis, project management, PMO, business analysis, and construction supervision—SOM provides its clients in the nuclear industry with effective solutions that meet the highest standards of safety, quality, and industrial performance. Its business-line organization, network of experts, and continuing education policy ensure that the best talent is mobilized to address the most demanding technical challenges.
As a strategic partner of EDF (operating fleet and new nuclear projects), SOM’s teams also work with key players in the industry—from the fuel cycle to nuclear propulsion, including research—to help meet the energy challenges of today and tomorrow.
Nuclear construction and equipment: bringing your industrial projects to life
Designing facilities is the first step. Building them requires industrial resources that can match the constraints of the nuclear environment. Ortec possesses industrial capabilities in manufacturing, installation, and heavy-lift handling to undertake the most demanding projects, in strict compliance with safety and quality requirements.
Construction and manufacturing
Working in a nuclear environment requires bringing together different skills and expertise. From installation to modification of general facilities, our teams combine various trades: boiler making, piping, metal framing, metalwork, and locksmithing. These areas of expertise are supported by industrial capabilities focused on the manufacture of nuclear parts, stainless steel boiler making and piping to RCC-M/ESPN requirements, as well as heavy metallurgy. As a Tier 1 supplier in metallurgy and nuclear maintenance work, Ortec operates four Orys workshops located in Pierrelatte, Blayais, Chinon, and Briare.
Nuclear Engineering References
From prefabrication to on-site installation, Ortec applies its expertise in nuclear piping to both new projects and existing facilities.
Mechanized welding, supports, and backup systems (EAS-u, MTS23): our expertise meets the needs of the EPR and EPR2 programs as well as modification projects for existing facilities.
Special lifting & heavy handling
Working in a nuclear environment requires constant adaptation to site constraints and the technical specifics of each installation. Our teams draw on their expertise in complex lifting, transport and logistics in constrained environments to design and carry out demanding operations. Lifting cranes, autonomous handling systems to limit radiation exposure, and the development of specialized tools are just some of the resources we employ, particularly for the replacement of large parts such as steam generators, heat exchangers, and cofferdams. This expertise extends to process maintenance, particularly for general upkeep, shutdown operations, and multi-disciplinary coordination for major projects.
References in Special Lifting Operations
We design custom tooling for your large-part replacement operations,
including autonomous handling systems to
minimize radiation exposure for teams and ensure safety during operations
in constrained environments.
Our achievements and flagship projects
Our technical capabilities are proven on the most demanding nuclear power projects.
Safety projects:
- Manufacture and installation of 36 ultimate backup diesel generators (DUS),
development of MTS23 backup circuits and installation of EAS-u circuits. - Complex lifting and handling: Steam generator replacement operations at Cruas with an autonomous
handling arm and replacement of major parts, replacement of 32-metric-ton heat exchangers at Cadarache, operations on PTR systems and shielded enclosures, heavy handling at EDF facilities.
Maintenance and nuclear services: ensuring availability and safety
In the nuclear industry, maintenance and specialized services are two inseparable drivers for ensuring installation availability, operational safety, and control of environmental impacts. Whether ensuring equipment reliability or conducting specialized cleaning, decontamination, and waste management operations, every task requires technical expertise, a thorough understanding of regulatory requirements, and a shared safety culture. Ortec puts this expertise to work for nuclear operators by offering services tailored to the specific requirements of each installation.
Maintenance nucléaire
Nuclear maintenance relies on two complementary areas of expertise. The first involves mechanical and electromechanical maintenance operations, performed both during reactor shutdowns and while the plant is in operation, on valves, rotating machinery, steam generators, mobile decontamination units, and hydraulic structures. The second area involves process maintenance and covers the coordination of multi-site projects, shutdown operations, contingency management, and the optimization of maintenance times. Together, these two approaches contribute to equipment availability and the performance of maintenance operations.
References in Nuclear Maintenance
Ortec benefits from multi-year contracts with EDF covering all French nuclear power plants, including approximately 60 mechanical maintenance projects during reactor shutdowns and projects carried out on reactors in operation.
Specialized cleaning, decontamination and waste
Maintaining nuclear facilities in operational condition also relies on specialized cleaning, decontamination, and waste management operations. Our teams perform industrial cleaning and maintenance of systems and vessels: mechanized cleaning, flushing, draining, and descaling of condensers using solutions such as NT4. Our expertise also covers heavy-duty decontamination, specialized remediation work, and remediation of radioactive contamination, as well as the collection, sorting, treatment, and management of waste, including radioactive waste, as part of remediation and decommissioning operations.
References in Specialized cleaning
Eight condenser descaling shutdowns using mechanized cleaning at five nuclear power plants in 2024, in addition to contracts for cleaning and decontamination in a nuclear environment.
Ortec is revolutionizing preventive and corrective maintenance with advanced robotics solutions and digital remote assistance.
Our aim: to increase the availability of your assets, reduce physical strain and ensure the safety of operations in a nuclear environment.
Our solutions and field experience:
- Robotics and Innovation: Use of the NT4 robot for mechanized condenser descaling and roll-out of connected remote assistance glasses to provide real-time expert support on-site.
- High value-added services: Remediation and heavy decontamination operations, optimized waste management and multi-site electromechanical maintenance.
Nuclear culture, training and innovation
In an industry where safety leaves no room for improvisation, Ortec fosters a common nuclear culture for all its teams. This requirement is supported by the ongoing training of our employees, led by our in-house O’Métiers training school, an integrated service offering, and our capacity for innovation that keeps pace with industry developments.
ISO 19443 safety culture: your safety is our priority
As a strategic supplier to EDF, Ortec ensures its teams meet the most rigorous standards in the nuclear industry, notably through ISO 19443 certification. This culture of quality and safety is cultivated on a daily basis through training, as well as through hands-on experience in the field, where rigor, traceability, risk prevention, radiation protection, and consideration of organizational and human factors guide every one of our operations.
O’Métiers: training our teams in nuclear excellence
Since 1992, Ortec has relied on its own in-house training school, O’Métiers, to build the skills of its employees in a way that closely reflects real-world conditions and industry challenges. As an approved body, O’Métiers boasts eight training centers in France and offers 550 different in-person and distance learning courses. For the nuclear sector, O’Métiers offers a wide range of courses: project engineering on nuclear sites, piping calculations, EDF software, etc.
We provide all our new employees with a four-step onboarding program to familiarize them with the nuclear industry:
- Industry context
Understanding the environment and the major challenges facing the nuclear sector. - Safety essentials
Learning the essential principles of nuclear safety culture. - Introduction to EDF power plants
Getting to know the organization and environment of nuclear power plants. - Power plant visit
Comparing what you’ve learned with real-world conditions.
Beyond technical skills, this program helps employees integrate into the workforce and fosters the sharing of work methods and a safety culture that are essential for operations on nuclear facilities.
An integrated offering: engineering, construction, maintenance
The Ortec Group draws on the complementary nature of its business lines to support the most demanding nuclear projects. Our integrated offering combines three areas of expertise: engineering, construction and maintenance, which can be deployed simultaneously on a single project. This organization promotes continuity between the design, execution and maintenance of facilities. By combining these areas of expertise from the earliest stages of a project, we can anticipate technical constraints, ensure the feasibility of the project, and prepare for future maintenance operations within a common framework of safety and industrial performance. We apply this approach to major nuclear operations, whether they involve ultimate backup diesel generator (DUS) programs, MTS23/EAS-u modifications, or major reactor shutdowns.
We innovate to boost your nuclear performance.
Innovation is a key lever when it comes to improving operational performance, strengthening safety and reducing employee risk exposure. The Ortec Group develops and rolls out solutions that are adapted to the specific requirements of the nuclear sector:
- 3D modeling: preparation of operations, optimization of designs, and anticipation of technical constraints.
- NT4 robot: descaling of condensers with enhanced safety and efficiency.
- Connected glasses: remote assistance and sharing of expertise in real time during operations.
- Decontamination and remediation solutions: roll-out of innovative equipment, such as the NED (Nuclear Environment Decontaminator) robot, which significantly reduces employee exposure to radiation.
These innovations rely on nuclear-specific industrial resources, including Orys manufacturing workshops, a mechanized welding training center, lifting equipment, and specialized tooling. They all share the same goal: to design practical innovations, tailored to actual conditions in the field.
Present at all 18 nuclear power plants: responsiveness and local expertise
Ortec’s commitment to the French nuclear industry can be seen in its presence at all 18 nuclear power plants and in the more than 2,000 employees working on nuclear projects. Located as close as possible to the sites, our branches and workshops allow our teams to respond quickly and develop a detailed understanding of each facility and its specific characteristics. This proximity is part of the hands-on culture that has defined Ortec since its inception. It allows us to gain a quick understanding of the unique challenges of each site, tailor solutions, and ensure the long-term operational continuity of projects, whether they involve engineering, construction, maintenance, or specialized cleaning.
Build the nuclear industry of tomorrow with Ortec
The French nuclear industry is entering a new era, driven both by the challenges facing existing facilities and by future nuclear projects. Joining us here at Ortec means joining a team of over 2,000 employees already working at the 18 nuclear power plants in France, at the heart of these developments. EPR2 engineering, reactor shutdowns, NT4 robotics, construction, maintenance, and safety: the diversity of our business lines offers numerous opportunities to develop your skills, build your career, and progress through various projects.
Joining Ortec means taking part in projects that will shape the nuclear sector for decades to come.
Technicien / ingénieur Bureau Technique Structure aéronautique H/F
- CDI
- Roissy-en-France, Île-de-France
Chef de Chantier Maintenance nucléaire Dampierre
- CDI
- Dampierre-en-Burly, Centre-Val de Loire
Chef de Projet Installation Générale Nucléaire H/F
- CDI
- Aix-en-Provence, Provence-Alpes-Côte d'Azur
