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Large airborne release of radioactivity over Norway from foreign facilities
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Large airborne release of radioactivity over Norway from domestic facilities
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Local release from mobile source (including mobile reactors on vessels)
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Local incident that develops over time (e.g. Goiânia accident, Litvinenko poisoning)
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Release of radioactivity to the marine environment
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Incident abroad with consequences for Norwegian citizens or Norwegian interests (e.g. Fukushima accident)
An incident is often divided into an early and a late phase.