INES Levels
INES N/A
INES 0
INES 1
INES 2
INES 3
INES 4
INES 5
INES 6
INES 7

INES 2: Incident

Impact on People and Environment:
  • Exposure of a member of the public in excess of 10 mSv.
  • Exposure of a worker in excess of the statutory annual limits.
Impact on Radiological Barriers and Control:
  • Radiation levels in an operating area of more than 50 mSv/h.
  • Significant contamination within the facility into an area not expected by design.
Impact on Defence-in-Depth:
  • Significant failures in safety ­provisions but with no actual ­consequences.
  • Found highly radioactive sealed orphan source, device or transport package with safety provisions intact.
  • Inadequate packaging of a highly radioactive sealed source.
▸ Legenda & explanation
date title location 
2021-07-22Automatic trip of both reactors following loss of off-site electric suppliesUnited KingdomHeysham 1 Power Station
2018-09-24Misdelivered Radioactive Transport PackagesUnited KingdomExport packing company in vicinity of Heathrow
2019-11-15Radioisotope Manufacture Facility – Operator’s hands contaminatedUnited KingdomEngland, F-18 Cyclotron Facility
1999-11-19Discovery of a crack in boiler superheater penetrationUnited KingdomDUNGENESS-B2 UNIT B
2003-07-11Auto-trip of R21, following trip of Main Boiler Feed Pump, subsequent breach of Gas Circulator 22 Inlet Temp. limitUnited KingdomDUNGENESS-B1 UNIT A
2009-06-29Introduction of potentially moderating material to fuel routeUnited KingdomDUNGENESS-B1 UNIT A
2018-12-31External corrosion affecting multiple systems on a power reactorUnited KingdomDUNGENESS B
1993-06-29INTAKE OF RADIOACTIVE MATERIAL BY OPERATORS AT DOUNREAYUnited KingdomDOUNREAY
1998-05-07Loss of ventilation in Dounreay fuel cycle areaUnited KingdomDOUNREAY
1991-06-15TEMPERATURE TRANSIENT DURING START-UPUnited KingdomBRADWELL UNIT A
1993-01-12SIGNIFICANT SPILLAGE OF PLUTONIUM LADEN SOLVENTUnited KingdomBNFL, Sellafield
1993-02-12OVEREREXPOSURE OF A RADIOGRAPHY INSPECTOR AS A RESULT OF A WOUNDUnited KingdomBNFL, Sellafield
1993-05-18SEEPAGE FROM A WASTE DRUMUnited KingdomBNFL, Sellafield
1995-07-04SKIN EXPOSURE IN EXCESS OF DOSE LIMITUnited KingdomBNFL, Sellafield
1995-03-24CONFIRMED DOSE ABOVE STATUTORY DOSE LIMIT PROBABLY DUE TO A WOUNDUnited KingdomBNFL, Sellafield
1997-02-03Spillage of active liquorUnited KingdomBNFL, Sellafield
1997-02-02Release of airborne activity into the workplace resulted in a building evacuationUnited KingdomBNFL, Sellafield
1999-04-11Spillage of radioactive materialsUnited KingdomBNFL, Sellafield
1999-10-18Incorrectly packaged radioactive sourcesUnited KingdomBNFL, Sellafield
1995-05-01ELEVATED URANIUM LUNG BURDENUnited KingdomBNFL SPRINGFIELDS
1994-01-12RADIOACTIVE CONTAMINATION IN AUXILIARY BUILDINGUkraineZAPOROZHE-4
1998-11-10Workers exposure during weld testsUkraineZAPOROZHE-3
1991-10-02CONTAMINATION OF THE SECONDARY WATER DUE TO ERRORS OF THE SPECIAL WATER TREATMENT FACILITY PERSONNELUkraineZAPOROZHE-2
1991-12-30UNIT SHUTDOWN AS A RESULT OF SPURIOUS OPERATION OF THE FIRE EXTINGUISHING SYSTEM AND DUE TO FLOODING OF ESFAS PANELSUkraineZAPOROZHE-2
1991-01-23UNIT SHUTDOWN DUE TO BREACH OF NORMAL OPERATION CONDITIONSUkraineZAPOROZHE-1
1993-06-16RADIOACTIVE CONTAMINATION OF THE PART OF NPP SITEUkraineZAPOROZHE-1
1997-08-22Fresh fuel assembly damage during refuellingUkraineSOUTH UKRAINE-2
1990-12-01ESSENTIAL BUS DEENERGIZATIONUkraineSOUTH UKRAINE-1
1992-09-21REACTOR SHUTDOWN CAUSED BY AN EMERGENCY PROTECTION SYSTEM ACTUATION FOLLOWED BY NON-COMPLIANCE WITH THE SAFETY LIMITSUkraineSOUTH UKRAINE-1
1994-04-06DEFECT OF THE REACTOR PROTECTION SYSTEM LEVEL CONTROLLER OF THE STEAM GENERATORUkraineSOUTH UKRAINE-1