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 
1993-12-09EXCEEDING OF CL-CONCENTRATION IN PRIMARY CIRCUIT WATERSlovakiaBOHUNICE-2
1993-11-26HUMAN ERROR INITIATED SAFETY INJECTION/REACTOR TRIPSloveniaKRSKO
1993-10-18VIOLATION OF CHEMICAL REGIME OF STEAM GENERATOR FEED WATER (SGFW)SlovakiaBOHUNICE-3
1993-10-12IMPENETRABILITY TEST OF CONTAINMENT NOT APPROVEDSwedenBARSEBECK-2
1993-10-07RADIOACTIVE CONTAMINATION OF THE UNIT ROOMS DUE TO REACTOR COOLANT LEAK IN THE AUXILIARY SYSTEMRussian FederationBELOYARSKY-3(BN-600)
1993-09-15DETERIORATION OF NATURAL CIRCULATIONHungaryPAKS-2
1993-06-03DIESEL GENERATOR START FAILURESlovakiaBOHUNICE-3
1993-05-27UNIT SCRAM DUE TO INADVERTENT ACTUATION OF PRESSURIZER PILOT RELIEF VALVERussian FederationKOLA-3
1993-05-03UNCONTROLLED INCREASE OF REACTOR POWERHungaryPAKS-4
1993-04-22INTERVENTION OF AUTOMATIC POWER CONTROL (APC) DUE TO SPURIOUS SIGNALSlovakiaBOHUNICE-2
1993-03-14PVNGS 2 STEAM GENERATOR TUBE RUPTUREUnited States of AmericaPALO VERDE-2
1993-03-05UNITS DERATED TO 60% REACTOR POWER DUE TO SAFETY ANALYSIS CONCERNSCanadaBRUCE-1
1993-03-05COOLANT RADIOACTIVITY EXCEEDING OPERATING LIMITS DUE TO FUEL ROD FAILUREBrazilANGRA-1
1993-02-27WATER INGRESS IN ION CHAMBER HOUSING OF CHANNEL B & E OF REACTOR REGULATING AND PROTECTIVE SYSTEMIndiaNARORA-2
1993-02-24CRACKS IN PIPEBENDS (ELBOWS) IN THE RESIDUAL HEAT REMOVAL SYSTEMSwedenOSKARSHAMN-1
1993-02-23FALL DOWN OF CONNECTOR FRAGMENTS INTO THE REACTOR VESSELSlovakiaBOHUNICE-2
1993-02-12PLUTONIUM RECOVERY PLANT, B204United KingdomBNFL, Sellafield
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-3
1993-02-02UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADORussian FederationKOLA-4
1993-01-02SMALL STEAM LEAK FROM THE MAIN FLANGE OF THE PRIMARY COOLANT PUMP NO. 4BulgariaKOZLODUY-2
1992-12-23LEVEL DECREASE IN ECCS TANK 20TJ20B001,2HungaryPAKS-2
1992-12-13REACTOR SHUTDOWN BY THE ACTUATION OF THE EMERGENCY PROTECTION SYSTEM FOLLOWED BY NON-COMPLIANCE WITH THE SAFE OPERATING LIMITS ON STEAM GENERATOR COOLDOWN RATEUkraineROVNO-2
1992-12-08INCORRECT CONNECTION OF CABLES TO RELAYS IN SAFETY SYSTEMSSwedenRINGHALS-2
1992-11-12UNIT OPERATION WITH ONE REACTOR PROTECTION SYSTEM CHANNEL OUTUkraineSOUTH UKRAINE-2
1992-11-01INDICATIONS IN AUSTENITIC PIPING DISCOVERED DURING NON-DESTRUCTIVE TESTINGGermanyBRUNSBUETTEL
1992-10-15LEAKAGE OF REACTOR CIRCUIT PIPE 76 MM DIAMETER FROM REACTOR CHANNEL 32-24 TO THE DRUM SEPARATORLithuaniaIGNALINA-2
1992-09-22SMALL FIRES CAUSED BY SHORT-CIRCUITBulgariaKOZLODUY-5
1992-09-18LOSS OF INTERNAL POWER DUE TO THE TRIP OF THE MAIN TRANSFORMER (T-1)MexicoLAGUNA VERDE-1
1992-09-17TRITIUM ACTIVITY DISCHARGE TO LAKEIndiaRAJASTHAN-2
1992-09-16TRITIUM RELEASE DUE TO SPILLAGE OF HEAVY WATER FROM MODERATOR SYSTEMIndiaKALPAKKAM-2