The nuclear power plant at Cernavoda is unique in Romania. Due to its strategic profile, one of the main concerns of the authorities is the nuclear safety and security. Special standard are to be followed in order to insure the long term (60 years) functionality in safe conditions. TERRASIGNA used EO techniques based on satellite imagery, noninvasive and reliable instruments, for monitoring the stability of the buildings and the surroundings, contributing to efficient maintenance and accident prevention activities.