Santa María de Garoña Nuclear Power Plant is a closed nuclear power station at Santa María de Garoña Burgos (Spain). It consists of one boiling water reactor (BWR) of 466 megawatts (MWe). The reactor vessel was built in 1966 by the Dutch RDM. being the oldest Spanish Nuclear Power Plant in service. The reactor as a BWR/3 model with a Mark I containment building.The plant was opened in 1971 and officially closed on 5 July 2009.