The transition from fossil fuels to alternative energy sources has rendered power stations obsolete as to the manner in which they were conceived. Despe has developed various technologies to better address the 'revamping' processes safely and with maximum respect for the environment. Controlled demolition, from the substation to the machinery room, from boilers to desox and denox filtering systems, and electrofilters to off gas systems, have been the subject of dozens of interventions that have contributed to the creation of a unique know-how in Europe.