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 
1991-03-19LEAKAGE IN THE GASEOUS WASTE PROCESSING SYSTEM (GWPS)BrazilANGRA-1
1994-04-12IRRADIATED FUEL ROD REMAINING IN THE FLASK WITHOUT COOLING - HUMAN ERRORIndiaCIRUS
2001-10-09Iridium source lost in a stolen vanBelgiumBINCH
1993-04-22INTERVENTION OF AUTOMATIC POWER CONTROL (APC) DUE TO SPURIOUS SIGNALSlovakiaBOHUNICE-2
1996-02-28Internal Contamination of Several Workers While Cleaning up EquipmentSpainVANDELLOS-1
2014-05-02Inspection of Container No.TSAU 2600500 for Radioactive ContaminationSri Lankasri lanka colombo port
1992-07-04INSPECTION HEAD LEFT IN CHANNEL G-09 IN UNIT-2IndiaRAJASTHAN-2
1992-06-04INOPERABILITY OF HERMETIC COMPARTMENT PRESSURE INDICATORS OF ESFASCzech RepublicDUKOVANY-2
2006-07-25INES-rating due to earlier event at Forsmark 1 - Two emergency DG did not start when the unit was disconnected from the ordinary off-site gridSwedenFORSMARK-2
1992-11-01INDICATIONS IN AUSTENITIC PIPING DISCOVERED DURING NON-DESTRUCTIVE TESTINGGermanyBRUNSBUETTEL
2000-08-27Increase in the gamma background in front of the reactor building of unit 3BulgariaKOZLODUY-3
1991-09-20INCREASE ACTIVITY OF WASTE WATER FROM THE A-1 AND V-1 NPPSSlovakiaBOHUNICE-1
1994-04-18INCORRECT SAFEGUARD REPORTINGSwedenRINGHALS-2
1992-12-08INCORRECT CONNECTION OF CABLES TO RELAYS IN SAFETY SYSTEMSSwedenRINGHALS-2
2001-06-20Incorrect calculation of an algorithm in overload protection devices for local power distribution at Ringhals 2 NPP.SwedenRINGHALS-2
2003-12-08Incidents of Radioactivity in Consumer ProductsCanadaConsumer Products
2006-12-07Incidental Exposure during maintenance tasksArgentinanon nuclear
2008-08-03Incident involving radioactive material at IAEA safeguards laboratoryAustriaIAEA Safeguards Seibersdorf Laboratory
1991-09-08INADVERTENT STEAM RELEASE INTO THE REACTOR HALL DUE TO STOP OF PUMP IN RESIDUAL HEAT REMOVAL SYSTEMSwedenBARSEBECK-2
1994-08-12INADVERTENT LOADING OF FUEL COLUMN DURING ON-POWER REFUELLING OF COOLANT CHANNELIndiaKALPAKKAM-1
1995-05-08INADVERTENT DISCHARGE OF LIQUID RADIOACTIVE WASTEIndiaTARAPUR WASTE IMM. PLANT
2012-09-05Inadequate planned repair of the 10UV68S201 quick-acting gate valve despite of the regulations of the Operational Limits and ConditionsHungaryPAKS-1
2002-11-28Improper performance of radiographySloveniaWelding Institute, Ljubljana
1993-10-12IMPENETRABILITY TEST OF CONTAINMENT NOT APPROVEDSwedenBARSEBECK-2
2005-11-25I-192 sealed source stolenItalyORAT s.r.l. Company for industrial non destructive analysis
1993-11-26HUMAN ERROR INITIATED SAFETY INJECTION/REACTOR TRIPSloveniaKRSKO
1995-01-29HUMAN ERROR INITATED REACTOR TRIPUkraineCHERNOBYL-3
1995-10-31HIGH RADIATION LEVELS IN REACTOR BUILDINGUnited States of AmericaLASALLE-1
1991-07-09HIGH ACTIVITY IN TB PITIndiaRAJASTHAN-2
1991-03-07HEAVY WATER SPILL FROM MODERATOR SYSTEMIndiaKALPAKKAM-1