The decommissioning of nuclear facilities is sometimes referred to as nuclear decommissioning, to mark the difference between “conventional” decommissioning and dismantling projects. In fact, the main difference to the dismantling of a “conventional“ facility is the possible presence of radioactive or fissile material in a nuclear facility, which requires special precautions. Decommissioning involves many administrative and technical actions, whose purpose, after a facility has been taken out of service, is to allow its release from regulatory control and relieve the licensee of his responsibility for its nuclear safety.