Rehabilitation amounts to four fields of intervention:
- The rehabilitation to return to power plants their original performances,
- The modernization to improve their performances thanks to the technological progress and better integrate them into their environment,
- The automation to replace the old systems of functioning and surveillance(supervision).
- The reconstruction for the very former or abandoned(very former or given up,very old or abandoned,very old or given up) sites.This intervention requires a global conception with the best possible use of the existing civil engineering.