INES Levels
INES N/A
INES 0
INES 1
INES 2
INES 3
INES 4
INES 5
INES 6
INES 7

INES 0: Deviation

No safety significance

(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 
1995-08-22REACTOR TRIP DUE TO LOSS OF 48V DC CONTROL POWERSouth KoreaULCHIN-1
1996-03-31Reactor trip due to improper operation of main feedwater bypass valveSouth KoreaKORI 1
1993-12-15REACTOR TRIP DUE TO GROUNDING OF POWER SUPPLY OF CONTROL RODSSouth KoreaYONGGWANG-2
1994-06-29REACTOR TRIP DUE TO GROUND OF MAIN GENERATOR PROTECTION RELAYSouth KoreaKORI 1
1993-10-28REACTOR TRIP DUE TO GENERATOR TRIP CAUSED BY ACTIVATION OF GENERATOR PROTECTION RELAYSouth KoreaKORI 1
1993-11-10REACTOR TRIP DUE TO FLUCTUATION OF PRESSURE IN MOISTURE SEPARATOR AND REHEATER (MSR) DRAIN TANKSouth KoreaKORI-2
1995-09-13REACTOR TRIP DUE TO FLUCTUATION OF LUBRICANT OIL PRESSURE IN TURBINE PROTECTION SYSTEMSouth KoreaULCHIN-2
1995-04-27REACTOR TRIP DUE TO FEEDWATER CONTROL VALVE CLOSURESouth KoreaYONGGWANG-3
1993-11-03REACTOR TRIP DUE TO FAST CLOSURE OF MAIN STEAM ISOLATION VALVE (MSIV)South KoreaKORI-3
1994-01-11REACTOR TRIP DUE TO FAST CLOSURE OF MAIN STEAM ISOLATION VALVE (MSIV)South KoreaKORI-4
1993-12-10REACTOR TRIP DUE TO FAST CLOSURE OF MAIN FEEDWATER ISOLATION VALVE (MFIV) CAUSED BY MALFUNCTION OF LOGIC CIRCUITSouth KoreaKORI-4
1993-10-18REACTOR TRIP DUE TO FAST CLOSURE OF MAIN FEED ISOLATION VALVES (MFIV)South KoreaKORI-3
1994-05-23REACTOR TRIP DUE TO FAILURE OF MAIN FEEDWATER CONTROL VALVE (MFCV)South KoreaULCHIN-2
2011-01-15Reactor trip due to failure in the Main GeneratorMexicoLAGUNA VERDE-1
1996-02-02Reactor trip due to degradation of photoresistic cell in the main feedwater control systemSouth KoreaULCHIN-1
1996-03-30Reactor trip due to actuation of sensitive relay influenced by starting currentSouth KoreaKORI 1
1995-11-27REACTOR TRIP DUE TO ACTUATION OF MAIN GENERATOR PROTECTION RELAYSouth KoreaKORI-2
1995-03-08REACTOR TRIP DUE TO ACTUATION OF GROUND FAULT RELAYSouth KoreaYONGGWANG-2
1996-08-14Reactor trip caused by blown fusesSloveniaKRSKO
1998-08-31Reactor trip breaker train B undervoltage card damageSloveniaKRSKO
1993-08-09REACTOR SHUTDOWN DUE TO LIGHTNINGSouth KoreaYONGGWANG-2
1991-02-13REACTOR SHUTDOWN DUE TO EXCESS HYDROGEN CONCENTRATION IN THE GENERATOR STATOR GAS TRAPUkraineZAPOROZHE-4
1994-01-18REACTOR SHUTDOWN CAUSED BY THE LEAKAGE DETECTED IN ONE OF THE REACTOR BUILDING ROOMSLithuaniaIGNALINA-1
1994-08-21REACTOR SHUTDOWN CAUSED BY LEAKAGE THROUGH A JOINT WELD IN THE ECCS PIPEWORKLithuaniaIGNALINA-1
1996-02-09REACTOR SHUTDOWN BY THE FAST-ACTING SCRAM SYSTEM DUE TO SPURIOUS SIGNALS OF INCREASED PRESSURE IN THE ISOLATION CONTROL VALVES ROOMLithuaniaIGNALINA-1
1993-03-18REACTOR SHUTDOWN BY THE ACTUATION EMERGENCY PROTECTION CAUSED BY THE LEVEL RAISE IN DRUM SEPARATORUkraineCHERNOBYL-3
1991-03-16REACTOR SCRAM ON TOTAL LOSS OF OFF-SITE POWERIndiaTARAPUR-1
1990-11-24REACTOR SCRAM ON TOTAL LOSS OF OFF-SITE AC POWER (CLASS IV). SRUOR-1-90-9.IndiaTARAPUR-1
1990-11-19REACTOR SCRAM ON PRM HIGH FLUX SUBSEQUENT TO SPURIOUS ACTUATION OF REACTOR RELIEF VALVES A & B (SRUOR-1-90-8)IndiaTARAPUR-1
1992-10-16REACTOR SCRAM ON PRM HIGH FLUXIndiaTARAPUR-1