construction activities contracted out by the Engineering and Innovation Division for the building of thermal, nuclear, and experimental plants: civil (excavation, foundations, carpentry, welding, brick laying, flooring, asphalting), mechanical (Demolition, structure assembly, prefabrication, welding), electrical (cable laying, electric cabinet installation, electrical connections with specialized technicians), automation (technological cabinet installations, control room installations, technological connections), and start-up (plant trials and start-up).