NUCLEAR SERVICES
Leaders in nuclear engineering and project execution, driving South Africa’s energy future with proven expertise and global partnerships.
Pioneers in South African Nuclear Excellence
Lesedi Nuclear Services is a recognised leader in nuclear engineering and nuclear project execution in South Africa, with a legacy rooted in the development of South Africa’s only nuclear power plant.
Originating as Intens Engineering in the mid-1980s—shortly after the commissioning of Koeberg Nuclear Power Station—Lesedi has grown into a multidisciplinary nuclear services provider with both national impact and international reach.
Strategic Partnership with Framatome
Lesedi’s principal shareholder is Framatome (formerly AREVA), one of the world's foremost nuclear technology companies. This strategic partnership strengthens Lesedi’s capabilities by connecting it to Framatome’s global network, resources, and technical know-how.
Through this alliance, Lesedi has become a trusted provider of nuclear engineering, maintenance, and plant modification services to Koeberg and for foreign entities where our Services division has done many plant interventions.
Our Core Capabilities
Lesedi brings decades of specialised experience in delivering safe, high-quality, and efficient nuclear engineering solutions.
Our services span the full spectrum of power island systems, critical infrastructure, and long-term operational support.
Our contribution extends to the following examples:
- Major plant life extension programmes
- Major component and system replacements, like the Steam Generators, the Refuelling Water Storage Tanks (PTR), Radiation Monitoring System (KRT), Fire Detection System (JDT) in the Reactor Building
- Power island modifications and balance-of-plant upgrades
- Scheduled outage maintenance (valves, pumps, and associated systems)
- Nuclear and conventional HVAC refurbishment and installation
- Nuclear fuel handling and refuelling assistance
- OEM-aligned project engineering and support services
- Turnkey design and implementation of safety-related and non-safety related modifications
Major Projects at Koeberg
Lesedi has been executing engineering modifications, life extension upgrades (SALTO being an example), and outage services at Koeberg Nuclear Power Station for nearly 30 years.
Our team has completed over 200 plant modifications, demonstrating unmatched familiarity with the station’s systems, safety requirements, and operational protocols.
- Steam Generator Replacement (SGR) – one of the largest nuclear component replacements ever undertaken in South Africa.
- PTR Tank Replacement – ensuring continued plant safety and regulatory compliance.
- Life extension modifications to support operation beyond the station’s original design life.
International Footprint
United Kingdom- France
- Spain
- Brazil
- United States
- China
- Finland
- Netherlands
- Argentina
Why Choose Lesedi for Nuclear Projects?
- Decades of experience in the African nuclear industry
- Support from, and access, to Framatome’s international nuclear expertise and contacts
- Proven safety, quality, and project performance track record
- Multidisciplinary engineering teams with nuclear-specific qualifications
- Certified to the highest standards, like ISO 19443, to operate in regulated nuclear environments
Ready to Power the Future
Whether supporting South Africa’s nuclear future or delivering solutions to the global fleet, Lesedi is committed to safe, innovative, and cost-effective nuclear energy services.
As new-build projects and SMR deployment opportunities emerge, Lesedi is well-positioned to contribute to the next era of nuclear technology.
