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 
2002-08-069 Identical Strontium-90 Radioactive Sources Found in Metal Scrap from ArmeniaNetherlandsJewometaal, Rotterdam-Botlek
1992-05-28A NON USUAL EVENT DUE TO THE LIBERATION OF GASES INSIDE THE PLANTMexicoLAGUNA VERDE-1
1996-01-21A PART OF THE RESIDUAL HEAT REMOVAL SYSTEM - THE AUXILIARY CONDENSER - TEMPORARILY NOT AVAILABLESwedenOSKARSHAMN-1
2016-03-07A sealed radioactive Cs-137 source contaminated the premises of waste management companyFinlandwaste management company
2023-03-24Accidental exposure of workersPolandRadioisotope Centre POLATOM, Otwock-Świerk
2020-11-28Am-241 meltingsFinlandFinnish steel factory
2012-02-23Am-241 source meltingFinlandOutokumpu Tornio Works
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
1992-01-18AN IMPORTANT LOSS OF COMMUNICATIONS IN MAIN CONTROL ROOMMexicoLAGUNA VERDE-1
1997-08-17Automatic protection system disconnected during non nuclear heat up after refuellingSwedenRINGHALS-2
1995-11-22AUTOMATIC REACTOR UNLOADING DUE TO SPURIOUS OPENINGS OF VALVES BETWEEN A GROUP OF ECCS PRESSURIZED TANKS AND REACTORLithuaniaIGNALINA-2
2019-01-11Co60 source discovered in a scrap metal deliveryGermanyPort of Hamburg
1992-06-10CONTAMINATED PARTICLES DISCOVERED ON-SITEBulgariaKOZLODUY-1
2013-12-13Contaminated Transport Package-Used Machineries and spare partsSri LankaColombo port-Consignee-M/S Tsukuba Lanka
2003-12-23Contamination of Demineralized Water System & Uncontrolled Minor Radioactivity ReleaseSouth KoreaYONGGWANG-5
1991-07-22CONTAMINATION OF SOIL ON SITEBulgariaKOZLODUY-1
1991-12-13CONTAMINATION OF SUBSOIL AT DHRUVA - CIRUS COMPLEXIndiaDHRUVA
1993-03-05COOLANT RADIOACTIVITY EXCEEDING OPERATING LIMITS DUE TO FUEL ROD FAILUREBrazilANGRA-1
1994-01-18CRACK IN CONTROL ROD HOUSINGSpainJOSE CABRERA-1 (ZORITA)
1993-02-24CRACKS IN PIPEBENDS (ELBOWS) IN THE RESIDUAL HEAT REMOVAL SYSTEMSwedenOSKARSHAMN-1
2007-04-19Cs-137 source found in a scrap container prepared for exportLebanonEl Khaled Scrapyard / Tripoli
2002-04-09Damage of a type "A" package during transhipment at Roissy airport (France) between Poland and UkraineFranceRoissy Charles De Gaulle airport
1994-08-31DAMAGE TO A SPENT FUEL ASSEMBLY DURING PREPARATORY OPERATIONS FOR REPROCESSINGRussian FederationMAYAK, RT-1
1994-05-25DEFECT OF MAIN GATE VALVE STUDSUkraineSOUTH UKRAINE-1
1996-07-12Degradation of essential service water (ES'W) for a year due to a defficient design modificationSpainASCO-1
1988-06-30DEGRADATION OF NATURAL CIRCULATIONHungaryPAKS-4
1997-05-16Degraded containment pressure suppression function during shutdown of reactor before outage periodSwedenFORSMARK-2