Nuvia, a VINCI Construction subsidiary, has acquired Marsein, a key player in Spain's nuclear services market, enhancing its international presence and expertise in maintenance and decommissioning.

Target Information

Marsein is a prominent player in Spain's nuclear services sector, known for its mechanical maintenance, welding, nuclear facility decommissioning, and nuclear waste management. Established over 40 years ago, the company has been instrumental in the development and maintenance of Spain's nuclear fleet, currently overseeing the maintenance of several nuclear installations. In 2024, Marsein reported a turnover of €32 million and employs approximately 280 professionals across the country.

Marsein has also been involved in significant decommissioning projects, including the early operations at the Vandellós I, José Cabrera – Zorita, and Santa María de Garoña nuclear power plants.

Industry Overview in Spain

The nuclear energy industry in Spain has undergone significant transformation over the past few decades. With a robust infrastructure supporting nuclear power generation, nuclear facilities have become a vital component of the country’s energy m