a postulated accident leading to accident conditions for which a facility is designed in accordance with established design criteria and conservative methodology, and for which releases of radioactive material are kept within acceptable limits, postulated accident, characteristic of the nuclear steam-supply system or nuclear energy installation and considered as sufficiently representative from the point of view of radiological consequences on the staff and the neighbouring population, a postulated accident that a nuclear facility must be designed and built to withstand without loss to the systems, structures, and components necessary to ensure public health and safety, postulated accidents, or natural forces, and resulting conditions for which the confinement structure, systems, components and equipment must meet their functional goals, postuleeritud õnnetus, mille tulemusel tekib rajatises õnnetuse olukord, mida on projekteerimisel arvesse võetud kasutades vastavaid projekteerimise kriteeriumeid ja konservatiivseid meetodeid, ja tagatakse, et radioaktiivse materjali lekked jäävad aksepteeritud piiridesse