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 
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
2015-02-03Missing Dangerous Source at Salamanca, GuanajuatoMexicoSalamanca, Guanajuato
2018-07-06Stolen industrial radiography device in Mexico CityMexicoMexico City
2010-10-22Potential damage in riser pipe at Laguna Verde NPP U2MexicoLAGUNA VERDE-2
2010-12-02Non Usual Event declared due to loss of outside power at Laguna Verde NPP U1MexicoLAGUNA VERDE-1
1992-05-09REACTOR SHUTDOWN BY TECHNICAL SPECIFICATIONS APPLICATION (UNUSUAL EVENT)MexicoLAGUNA VERDE-1
1992-01-18AN IMPORTANT LOSS OF COMMUNICATIONS IN MAIN CONTROL ROOMMexicoLAGUNA VERDE-1
1992-05-13RECIRCULATION TRANSIENT WITH A SUDDEN INCREASE IN POWER OVER 100%MexicoLAGUNA VERDE-1
1992-05-28A NON USUAL EVENT DUE TO THE LIBERATION OF GASES INSIDE THE PLANTMexicoLAGUNA VERDE-1
1992-09-18LOSS OF INTERNAL POWER DUE TO THE TRIP OF THE MAIN TRANSFORMER (T-1)MexicoLAGUNA VERDE-1
2022-09-14Missing Dangerous Source at Estado de MexicoMexicoEstado de Mexico
2018-02-08Stolen Moisture/Density Gauge in León, GuanajuatoMexicoComunidad Santa Ana del Conde, León, Guanajuato.
2016-08-05Stolen Source at Ciudad Obregon, Sonora, MexicoMexicoCiudad Obregon, Sonora, Mexico
2020-09-19Stolen Catgeory-2 source at Ciudad Obregon, Sonora, México.MexicoCiudad Obregon, Sonora
2017-01-23Stolen and recovered nuclear densimeterMexicoCiudad Juarez, Chihuahua, Mexico
2023-10-18Stolen cat-3 source in MexicoMexicoCiudad del Carmen, Tabasco
2015-04-14Missing Dangerous Source at Cárdenas, Tabasco, MéxicoMexicoCárdenas, Tabasco, México
2020-10-03Stolen Radiography CameraMexicoCalpulalpan- Texcoco road (Km 59) / Transport
2014-07-03Stolen pick-up truck with Ir-192 cat II sourceMexicoAtizapan de Zaragoza, Mexico State
1992-10-15LEAKAGE OF REACTOR CIRCUIT PIPE 76 MM DIAMETER FROM REACTOR CHANNEL 32-24 TO THE DRUM SEPARATORLithuaniaIGNALINA-2
1994-02-24DETERIORATION OF THE PRIMARY CIRCUIT INTEGRITYLithuaniaIGNALINA-2
1994-07-11MALFUNCTION IN THE SYSTEM OF NEUTRON CONTROL OF REACTOR POWER FOLLOWING THE REPLACEMENT OF A CONTROL ROD SWITCHLithuaniaIGNALINA-2
1995-11-22AUTOMATIC REACTOR UNLOADING DUE TO SPURIOUS OPENINGS OF VALVES BETWEEN A GROUP OF ECCS PRESSURIZED TANKS AND REACTORLithuaniaIGNALINA-2
1995-11-30OVEREXPOSURE OF OPERATOR DURING CALIBRATION OF IN-CORE SENSORSLithuaniaIGNALINA-2
1994-02-07FAILURE OF THE FOAM FIRE-EXTINGUISHING SPRINKLER SYSTEM TO OPERATE FOR 16 HOURS DUE TO FROZEN PIPESLithuaniaIGNALINA-1
2007-04-19Cs-137 source found in a scrap container prepared for exportLebanonEl Khaled Scrapyard / Tripoli
1999-07-12Manual shutdown of Tsuruga Power Station Unit 2JapanTSURUGA-2
1994-12-11REACTOR AUTOMATIC SHUTDOWN BY SIGNAL OF NUCLEAR INSTRUMENTATION SYSTEMSYSTEMJapanONAGAWA-1
2008-04-07Loss of Industrial Gamma Radiography Exposure Device containing Ir-192 radiography sourceJapanNon-Destructive Inspection Co., Ltd / Chiba
1995-12-08Secondary sodium leakage in the prototype fast breeder reactor MonjuJapanMONJU