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 
2000-06-15Unplanned exposure of workersSlovakiaBOHUNICE-4
1993-10-18VIOLATION OF CHEMICAL REGIME OF STEAM GENERATOR FEED WATER (SGFW)SlovakiaBOHUNICE-3
1993-06-03DIESEL GENERATOR START FAILURESlovakiaBOHUNICE-3
1993-12-21TURBINE TRIP DUE TO PRESSURE DROP IN STEAM GENERATOR MAIN COLLECTORSlovakiaBOHUNICE-2
1993-12-09EXCEEDING OF CL-CONCENTRATION IN PRIMARY CIRCUIT WATERSlovakiaBOHUNICE-2
1993-04-22INTERVENTION OF AUTOMATIC POWER CONTROL (APC) DUE TO SPURIOUS SIGNALSlovakiaBOHUNICE-2
1993-02-23FALL DOWN OF CONNECTOR FRAGMENTS INTO THE REACTOR VESSELSlovakiaBOHUNICE-2
1991-09-20INCREASE ACTIVITY OF WASTE WATER FROM THE A-1 AND V-1 NPPSSlovakiaBOHUNICE-1
1990-12-06TURBINE SJAES STEAMING DUE TO PLANT PERSONNEL ERRORRussian FederationSMOLENSK-3
1991-12-06DEVIATION FROM THE NORMAL ON-LOAD REFUELING REGIME DUE TO FUEL ASSEMBLY SEPARATION FROM THE CONNECTING BARRussian FederationSMOLENSK-3
1990-07-22LOSS OF POWER SUPPY TO REACTOR COOLANT PUMPS DUE TO 6 KV CABLE FIRERussian FederationSMOLENSK-2
1991-01-11UNIT SHUTDOWN DUE TO SG-4 PULSE LINE RUPTURERussian FederationNOVOVORONEZH-5
1996-01-31Reactor scram followed by the actuation of safety valve in the reactor primary circuitRussian FederationNIIAR Inst., Dimitrovgrad
1997-07-26Slightly increased radioactivity release outside the reactor while preparing for removal of leaky fuel assemblyRussian FederationMIR-M1, RU-0013
1994-08-31DAMAGE TO A SPENT FUEL ASSEMBLY DURING PREPARATORY OPERATIONS FOR REPROCESSINGRussian FederationMAYAK, RT-1
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-4
1993-05-27UNIT SCRAM DUE TO INADVERTENT ACTUATION OF PRESSURIZER PILOT RELIEF VALVERussian FederationKOLA-3
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-3
1991-03-31WRONG POSITIONING OF THE FUEL ASSEMBLY WHILE PERFORMING FUEL ROD CLADDING INTEGRITY TESTRussian FederationKOLA-2
1992-04-16DEGRADED WATER CHEMISTRY IN THE PRIMARY CIRCUIT DUE TO CEMENT MORTAR INGRESS INTO THE BORATED WATER STORAGE TANKRussian FederationKOLA-2
1991-06-01UNIT SHUTDOWN DUE TO PERSONNEL ERRORS AND DAMAGE TO RCP 6 KV BREAKERRussian FederationKALININ-2
1993-10-07RADIOACTIVE CONTAMINATION OF THE UNIT ROOMS DUE TO REACTOR COOLANT LEAK IN THE AUXILIARY SYSTEMRussian FederationBELOYARSKY-3(BN-600)
1992-07-06FAILURE OF TWO DIESEL GENERATORS WHILE ROUTINE TESTING DURING UNIT MAINTENANCERussian FederationBALAKOVO-2
1995-06-07PERSONNEL IRRADIATION IN A THERMAL POWER PLANT DURING MAINTENANCE WORKSRomaniaTPP BORZESTI
2001-06-30Unauthorized dismantling of a furnace containing Co-60 radioactive sourcesRomaniaS.C. Forever/ Calan
2001-11-29Loss of radioactive source Cs-137 included in a Beckman deviceRomaniaCERNAVODA-1
2011-10-04Hazardous manipulation of a lightning rod with Ra-226PortugalVila Nova de Gaia
2015-07-15Theft of a device containig radioactive sourcePolandZabrze
2009-05-16Person contaminatedPolandRadioisotope Centre POLATOM/Otwock-Swierk
2023-03-24Accidental exposure of workersPolandRadioisotope Centre POLATOM, Otwock-Świerk