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