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 
1991-03-31WRONG POSITIONING OF THE FUEL ASSEMBLY WHILE PERFORMING FUEL ROD CLADDING INTEGRITY TESTRussian FederationKOLA-2
1997-03-26Worker contamination for AM-241 inhalation when manipulating a radiation detectorSpainVANDELLOS-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
1996-08-13Water leak into a hot cell at the Studsvik research establishmentSwedenStudsvik Nuclear AB
1993-02-27WATER INGRESS IN ION CHAMBER HOUSING OF CHANNEL B & E OF REACTOR REGULATING AND PROTECTIVE SYSTEMIndiaNARORA-2
2022-05-29Violation of Operational Limits and Conditions is the Interim Spent Fuel Storage FacilityHungaryPaks, Interim Spent Fuel Storage Facility
2021-02-11Violation of OL&C in the Interim Spent Fuel Storage Facility at PaksHungaryPaks
1996-07-08Violation of limts and conditions - a late test of spray pumpsCzech RepublicDUKOVANY-4
1996-04-16Violation of limits and conditions - a late test of emergency core cooling system pumpsCzech RepublicDUKOVANY-2
2004-05-28Violation of heat-up rate during restart of reactorSwitzerlandLEIBSTADT
2004-05-28Violation of Containment ventilation operation modeSwitzerlandLEIBSTADT
1993-10-18VIOLATION OF CHEMICAL REGIME OF STEAM GENERATOR FEED WATER (SGFW)SlovakiaBOHUNICE-3
2002-07-05Unshielded Radioactive Source Eu-152 in Metal scrapNetherlandsUzimet BV, Rijswijk ZH
2000-09-19Unshielded Cs-137 source found in metal scrapNetherlandsJewometaal, Rotterdam-Botlek
2000-06-15Unplanned exposure of workersSlovakiaBOHUNICE-4
2004-10-20Unplanned exposure of workersFinlandPorvoo
1991-05-11UNPLANNED EXPOSURE OF PERSONNEL DURING REFUELLINGBulgariaKOZLODUY-5
1993-03-05UNITS DERATED TO 60% REACTOR POWER DUE TO SAFETY ANALYSIS CONCERNSCanadaBRUCE-1
1992-05-13UNIT-2 EMERGENCY CONDENSER LOOP A TUBE FAILUREIndiaTARAPUR-2
1991-01-11UNIT SHUTDOWN DUE TO SG-4 PULSE LINE RUPTURERussian FederationNOVOVORONEZH-5
1991-06-01UNIT SHUTDOWN DUE TO PERSONNEL ERRORS AND DAMAGE TO RCP 6 KV BREAKERRussian FederationKALININ-2
1993-05-27UNIT SCRAM DUE TO INADVERTENT ACTUATION OF PRESSURIZER PILOT RELIEF VALVERussian FederationKOLA-3
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-3
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-4
1992-11-12UNIT OPERATION WITH ONE REACTOR PROTECTION SYSTEM CHANNEL OUTUkraineSOUTH UKRAINE-2
1994-06-15UNINTENTIONAL SLOW INSERTION OF ALL CONTROL RODSSwedenFORSMARK-3
1995-07-10UNINTENTIONAL RELEASE TO THE SEA OF A MINOR AMOUNT OF SLIGHTLYCONTAMINATED WATERSwedenBARSEBECK-1
2001-07-19Underdimensioned rupture disc installed in the FILTRA-systemSwedenBARSEBECK-2
1993-05-03UNCONTROLLED INCREASE OF REACTOR POWERHungaryPAKS-4
2001-06-30Unauthorized dismantling of a furnace containing Co-60 radioactive sourcesRomaniaS.C. Forever/ Calan