International Nuclear and Radiological Event (Severity) Scale (INES)

• Developed by International Atomic Energy Agency (IAEA)
• Severity scale ranges from 1 (least severe) to 7 (most severe)
  • Overview
  • Brochure (PDF - 189 KB)
  • User's Manual 2008 Edition (PDF - 2.43 MB)
• Note nomenclature difference between IAEA and US
  • IAEA nomenclature references "event".
  • US nomenclature references "incident" in the NIMS.

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