+33 3 87 71 43 95 contact@masci.fr

Nuclear and renewable energies

The energy market is the group’s first business. We operate historically in the fields of electricity generation and distribution, from the nuclear, hydraulic and thermal sectors. Our future will include a growing share of renewable energy services, particularly hydro and wind.

Given the very high level of nuclear requirements, we have specialized highly qualified and duly certified teams to work on all nuclear sites, whether in controlled areas or not.

We implement the most rigorous procedures for site preparation, intervention and project disbanding. We exploit feedback after each project, to continuously progress in Quality, Safety, Security and Radiation Protection. We strictly respect our clients’ references and procedures, in particular EDF UTO CAS1.

Our teams intervene both during plant outages and in operation, on new projects, maintenance and life extension activities.


Our approvals and work comprise:

  • Anti-corrosion coatings
  • Concrete coatings
  • Concrete impermeability – Lining
  • Retention of pollutants
  • Resins and marking of floors
  • Project work OEII / MEII
  • Civil works
  • Renovation of condensers, exchangers and tube sheets
  • Treatment of asbestos
  • Lead treatment

We rely on the Masci Training School to train, empower and develop our operators and site supervisors, thus always satisfying the current and future skills required by our customers.

Our markets


Nuclear and

renewable energy




Gaz, Chemicals



Civil works and




Industry and




Water, sanitation and

District heating



Marine and