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 
2012-06-23Radiation Exposure of workers to tritiumIndiaRAJASTHAN-5
1993-03-14PVNGS 2 STEAM GENERATOR TUBE RUPTUREUnited States of AmericaPALO VERDE-2
1994-09-28PROTECTION SYSTEM FOR INITIATING BLOW DOWN NOT COMPLETELY REESTABLISHED AFTER REFUELLING OUTAGESwedenBARSEBECK-1
2003-12-16Process vessel with natural uranium compound found in stainless steel scrapNetherlandsJewometaal, Rotterdam-Botlek
1997-01-17Primary heat transport system leakage from coolant channel outlet feederCanadaPOINT LEPREAU
1991-02-05PRESSURIZER DISCHARGE TANK MEMBRANE RUPTUREBulgariaKOZLODUY-2
2005-05-02Potential Radiographer OverexposureUnited States of AmericaHouston
2005-06-27Potential Loss of Containment Due to Small Crack in TorusUnited States of AmericaFITZPATRICK
2010-10-22Potential damage in riser pipe at Laguna Verde NPP U2MexicoLAGUNA VERDE-2
1993-02-12PLUTONIUM RECOVERY PLANT, B204United KingdomBNFL, Sellafield
1994-04-07PLANT TRANSIENT INITIALLY CAUSED BY THE LOSS OF CIRCULATING WATER PUMPS DUE TO HIGH MARSH GRASS/DEBRIS CONCENTRATIONSUnited States of AmericaSALEM-1
1995-06-07PERSONNEL IRRADIATION IN A THERMAL POWER PLANT DURING MAINTENANCE WORKSRomaniaTPP BORZESTI
2009-05-16Person contaminatedPolandRadioisotope Centre POLATOM/Otwock-Swierk
1996-04-15Penetration of primary coolant and low level contamination of hermetic boxSlovakiaBOHUNICE-4
1994-08-11OVERFLOW OF A SOLUTION IN THE MAPU WORKSHOP (MEDIUM ACTIVITY PLUTONIM WORKSHOP) AT THE UP2-400 PLANTFranceLA HAGUE
2016-12-31Overexposure to RadiographerUnited States of AmericaTulsa, Oklahoma/Tulsa Gamma Ray
2013-12-10Overexposure to Member of the PublicUnited States of AmericaSeminole, Texas/Wilco NDT
1994-03-18OVEREXPOSURE OF OPERATORS WHILE CHARGING IRRADIATED FUEL BUNDLES INTO THE DISSOLVERIndiaTROMBAY PLUTONIUM PLANT
1995-11-30OVEREXPOSURE OF OPERATOR DURING CALIBRATION OF IN-CORE SENSORSLithuaniaIGNALINA-2
2015-05-20Orphan source foundThe Former Yugoslav Republic of MacedoniaAS Bosfor DOOEL Skopje-Metal Scrap Yard
2014-01-16One radioactive source containing Co-60 lost or stolenPolandbeaverboard manufacturer, Koniecpol, Śląskie regio
2006-06-22One partly shielded Cs-137 radioactive source found in a 40 ft scrap containerNetherlandsJewometaal, Rotterdam-Botlek
1991-09-18ONE FUEL ASSEMBLY TILTED DURING REFUELLINGSwedenRINGHALS-4
1995-07-15ONE CLOSED VALVE IN THE CONTAINMENT PRESSURE RELIEF LINE TO THE ATMOSPHERE AND TWO CLOSED VALVES IN THE VENTING LINE TO THE EMERGENCY FILTERSwedenFORSMARK-2
1996-07-24On-site radioactive contaminationUkraineKHMELNITSKI-1
2014-07-30Object: Retrieval of Co-60 orphan source at Genoa port coming from Senegal.ItalyGenoa Voltri Port
1995-02-12NOT FULLY INSERTED CONTROL RODSSwedenRINGHALS-3
1995-11-10Non-closure of primary steam isolating valves on auto during total loss of power incidentIndiaTARAPUR-1
2010-12-02Non Usual Event declared due to loss of outside power at Laguna Verde NPP U1MexicoLAGUNA VERDE-1
1994-10-07NON RETRACTION OF SOUTH FUELLING MACHINE GUIDE SLEEVE FROM CHANNELS S-12IndiaRAJASTHAN-2