[en] Safety is not just an engineering discipline that consists of accumulating technological countermeasures to prevent any incident. It is a multi-disciplinary field that takes into account physics, biology, human and environmental sciences. Its ability to adapt to the realities of the field and to the capabilities of those involved, without ever giving in to complexity, is essential to ensure the greatest possible efficiency. This dossier reviews 11 key points about nuclear safety: 1 - Engineering? Safe systems must leave plenty of room for human intelligence; 2 - Stress corrosion, a look back at an unprecedented year; 3 - French reactors are safer than when they were commissioned; 4 - Nuclear power and safety: an overview of different approaches around the world (USA, UK, China); 5 - Safety and complexity: the limits of managerial action; 6 - The Nuclear Rapid Response Force continues to evolve; 7 - Heat wave 2022: water issues for nuclear operations; 8 - People's lives and radiation protection in contaminated areas; 9 - The biological effects of ionizing radiations; 10 - Protect, repair: French doctrine after a nuclear accident; 11 - Looking back: the main approaches to safety