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 
2013-11-22Two radioactive sources containing Co-60 lost or stolenPolandBełchatów Power Station (coal-fired power plant)
1997-07-01Two out of four diesel generators unavailable due to loose connection to the voltage regulatorSwedenRINGHALS-2
1995-06-02TURBINE/REACTOR TRIP CAUSED BY AN ERROR IN THE EH CONTROL SYSTEM OF THE TURBINE GENERATORSloveniaKRSKO
1993-12-21TURBINE TRIP DUE TO PRESSURE DROP IN STEAM GENERATOR MAIN COLLECTORSlovakiaBOHUNICE-2
1990-12-06TURBINE SJAES STEAMING DUE TO PLANT PERSONNEL ERRORRussian FederationSMOLENSK-3
1992-09-16TRITIUM RELEASE DUE TO SPILLAGE OF HEAVY WATER FROM MODERATOR SYSTEMIndiaKALPAKKAM-2
1992-06-28TRITIUM ACTIVITY IN PROCESS WATER RETURNIndiaRAJASTHAN-2
1992-09-17TRITIUM ACTIVITY DISCHARGE TO LAKEIndiaRAJASTHAN-2
1994-10-17THROUGH WALL CRACK OF THE UPPER PART OF THE FUEL CHANEL TRACT NO. 41-13UkraineCHERNOBYL-3
2004-06-14Theft of two low activity radioactive sources in PalaiseauFranceTransportation/France
2014-10-08THEFT OF RADIOACTIVE SOURCESPeruTalara, Piura, Geowell S.A.I.C.
2012-06-17Theft of portable radioactive gaugePeruUchucchacua, Oyón, Region Lima / BISA Construction
2006-11-16Theft of Nucleonic Density Gauge Device containing Cs-137 sourceIndiaCoal washery
2002-01-21THEFT OF NUCLEAR GAUGE WITH CS-137 AND AM-BE SOURCESPeruLima
2003-04-09THEFT OF NUCLEAR GAUGEPeruLima
2015-07-15Theft of a device containig radioactive sourcePolandZabrze
2019-10-01Theft and recovery of a moisture/density gaugeSlovakiaBratislava-Podunajské Biskupice
2006-06-22Temperature increase of control rod drive housing 6/7 during restart of Unit 4HungaryPAKS-4
1997-02-05Supposedly empty shipping containers found to contain nuclear materialSpainENUSA
2017-02-13Stolen source in San Juan del Río, Queretaro, MexicoMexicoSan Juan del Rio, Queretaro, Mexico
2016-08-05Stolen Source at Ciudad Obregon, Sonora, MexicoMexicoCiudad Obregon, Sonora, Mexico
2021-04-11Stolen Radiography Camera.MexicoTeoloyucan, Mexico State /
2020-10-03Stolen Radiography CameraMexicoCalpulalpan- Texcoco road (Km 59) / Transport
2006-09-13Stolen Radiographic Exposure DeviceUnited States of AmericaBonded Inspections
2015-03-06Stolen radioactive sourcesPolandPoznan
2021-02-08Stolen Radioactive Source in Mexico on February 8 at some point of the road between Apaseo el Alto and Salamanca, Guanajuato.MexicoSalamanca, Guanajuato State
2017-08-01Stolen radioactive materialMexicoSan Nicolas de los Garza, Nuevo León
2014-07-03Stolen pick-up truck with Ir-192 cat II sourceMexicoAtizapan de Zaragoza, Mexico State
2018-02-08Stolen Moisture/Density Gauge in León, GuanajuatoMexicoComunidad Santa Ana del Conde, León, Guanajuato.
2018-07-06Stolen industrial radiography device in Mexico CityMexicoMexico City