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 
1996-07-18Erroneous line-up before start-up of vent pipe valves to the scrubber systemSwedenFORSMARK-1
1996-07-24On-site radioactive contaminationUkraineKHMELNITSKI-1
1996-08-05Release of iodine-131 from 131 production plant of nuclear chemistry division Pakistan Institute of Nuclear Science and TechnologyPakistanPINSTEC
1996-08-13Water leak into a hot cell at the Studsvik research establishmentSwedenStudsvik Nuclear AB
1996-10-06Scram of the reactor caused by a wrong operation of the control room operatorCzech RepublicDUKOVANY-4
1997-01-17Slow insertion of control rodsSpainALMARAZ-2
1997-01-17Primary heat transport system leakage from coolant channel outlet feederCanadaPOINT LEPREAU
1997-02-05Supposedly empty shipping containers found to contain nuclear materialSpainENUSA
1997-03-26Worker contamination for AM-241 inhalation when manipulating a radiation detectorSpainVANDELLOS-1
1997-05-16Degraded containment pressure suppression function during shutdown of reactor before outage periodSwedenFORSMARK-2
1997-07-01Two out of four diesel generators unavailable due to loose connection to the voltage regulatorSwedenRINGHALS-2
1997-07-26Slightly increased radioactivity release outside the reactor while preparing for removal of leaky fuel assemblyRussian FederationMIR-M1, RU-0013
1997-08-17Automatic protection system disconnected during non nuclear heat up after refuellingSwedenRINGHALS-2
1998-06-24Reactor trip and natural circulation cooldown due to loss of offsite powerUnited States of AmericaDAVIS BESSE-1
1999-01-28Loss of reactor annulus integritySpainTRILLO-1
1999-07-12Manual shutdown of Tsuruga Power Station Unit 2JapanTSURUGA-2
1999-09-10Loss of 185 MBq of I-131 in type A packagingSouth AfricaSOUTH AFRICAN AE CORP.
2000-01-31Loss of power of a 220 VAC safety bus barArgentinaEMBALSE
2000-03-02Loss of a Promethium source (18.5 GBq)FranceTANDEM CONSULTANTS
2000-04-15Moderator water leak in moderator roomIndiaNARORA-2
2000-05-03Loss of an iodine-125 sourceFranceCIS BIO INTERNATIONAL
2000-06-07Loss of an Iodine-131 package between France and Spain during air shipmentFranceCIS BIO INTERNATIONAL
2000-06-15Unplanned exposure of workersSlovakiaBOHUNICE-4
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
2000-08-27Increase in the gamma background in front of the reactor building of unit 3BulgariaKOZLODUY-3
2000-09-19Unshielded Cs-137 source found in metal scrapNetherlandsJewometaal, Rotterdam-Botlek
2000-09-29Loss of a radioactive package containing a small amount of depleted uraniumFranceSICN COMPANY
2000-10-16Flooding event at the EUREX facilityItalyEUREX
2000-11-13Loss of a radioactive Type-A package containing 30,8 GBq of Thallium 201 between Paris-Roissy (France) and Budapest (Hungary) airportsFranceCIS BIO INTERNATIONAL
2000-11-28Loss of a radioactive package between Roissy (France) and Athens (Greece) airportsFranceCIS BIO INTERNATIONAL