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

INES 1: Anomaly

Impact on Defence-in-Depth
  • Overexposure of a member of the public in excess of statutory ­annual limits.
  • Minor problems with safety components with significant defence-in-depth remaining.
  • Low activity lost or stolen radioactive source, device or transport package.
(Arrangements for reporting minor events to the public differ from country to country. Also, it is difficult to ensure precise consistency in rating events between INES Level-1 and Below scale/Level-0)
Legenda & explanation
date title location 
2012-02-23Am-241 source meltingFinlandOutokumpu Tornio Works
2008-05-30Fast stop of the main circulation pumps and simultaneous loss of their fly wheel systems during reactor scram.FinlandOLKILUOTO-1
1990-05-28FEEDWATER TUBE RUPTURE DUE TO EROSION CORROSIONFinlandLOVIISA-1
1990-01-01FUEL BUNDLE LATTICE SPACING FAILURESFinlandLOVIISA-1
2000-08-17Water leakages at Loviisa-1 NPP unit from the fuel loading pool on 17 and 18 August 2000 during the annual maintenance outageFinlandLOVIISA-1
2020-11-28Am-241 meltingsFinlandFinnish steel factory
2018-09-21Am-241 source meltingFinlandFinnish steel factory
2018-09-15Am-241 source meltingFinlandFinnish steel factory
2018-06-26Am-241 source meltingFinlandFinnish steel factory
2018-07-26Am-241 source meltingFinlandFinnish steel factory
2004-06-06Small leakage from Residual Heat Removal System.Czech RepublicTEMELIN-2
2011-09-28Found radioactive sourceCzech RepublicPraha
1996-07-08Violation of limts and conditions - a late test of spray pumpsCzech RepublicDUKOVANY-4
1996-10-06Scram of the reactor caused by a wrong operation of the control room operatorCzech RepublicDUKOVANY-4
1996-04-21Spurious signal for actuation of the ESFAS caused by human errorCzech RepublicDUKOVANY-3
1992-06-04INOPERABILITY OF HERMETIC COMPARTMENT PRESSURE INDICATORS OF ESFASCzech RepublicDUKOVANY-2
1996-04-16Violation of limits and conditions - a late test of emergency core cooling system pumpsCzech RepublicDUKOVANY-2
1992-08-18LOW ACTIVITY BORATED WATER LEAK FROM MAKE-UP SYSTEMCzech RepublicDUKOVANY-1
1995-05-02SHORT VIOLATION OF LIMITS AND CONDITIONS DUE TO ONE AND A HALF HOUR UNAVAILABILITY OF 2 OUT OF 3 SAFETY SYSTEMSCzech RepublicDUKOVANY-1
2004-11-29Radioactive orphan source of Eu-152,154Croatianon-nuclear
1995-02-14DROP TIME OF CONTROL RODS OUT OF CRITERIONChinaGUANGDONG-1
1996-05-24Failure to replace horizontal flux detector shielding after maintenanceCanadaPOINT LEPREAU
1997-01-17Primary heat transport system leakage from coolant channel outlet feederCanadaPOINT LEPREAU
1996-04-19ECI impairment due to check valve failure resulting in forced outage of Pickering stationCanadaPICKERING-1
1991-09-19FUEL BUNDLE DAMAGE DURING TRANSFER TO SPENT FUEL BAYCanadaGENTILLY-2
2003-12-08Incidents of Radioactivity in Consumer ProductsCanadaConsumer Products
2002-12-24Start-up Instrumentation ImpairmentCanadaBRUCE-7
1995-05-14SPURIOUS OPENING OF REACTOR COOLANT LIQUID RELIEF VALVECanadaBRUCE-5
1993-03-05UNITS DERATED TO 60% REACTOR POWER DUE TO SAFETY ANALYSIS CONCERNSCanadaBRUCE-1
2012-09-03Stolen and lately recovered intact radioactive sourceBulgariaSofia