Long term environmental consequences. Full implementation of local emergency plans probably needed to limit serious health effects. Severe damage to a large fraction of the core and major plant contamination. External release of radioactivity resulting in a dose to the most exposed individual off-site of the order of a few millisieverts. Need for off-site protective actions generally unlikely except possibly for local food control.
Worker doses likely to have acute fatal consequences.
Criteria Examples 3 Serious incident External release of radioactivity above authorised limits, resulting in a dose to the most exposed individual off-site of the order of tenths of a millisievert. Radiological incident with members of the personnel receiving doses in excess of the annual limit Significant contamination of the installation which was not to be expected on the design basis. No safety significance Situations where operational limits and conditions are note exceeded and which are properly managed in accordance with adequate procedeures belong here. Individual failure in a redundant system. Single operational mistake without consequences.