In relation to the real or supposed risks, the actions currently carried out generally consist in setting up devices known as "safety devices" to reduce the occurrence or the gravity of potential accidents. These devices are sometimes passive (walls, retention) but generally active, in the sense that they require at least a source of energy or a sequence of activation. These devices are frequently described as " safe ", proof of the confidence which is primarily granted to them, but these qualities are not always related to explicitly defined criteria.
