| date | INES  | title | location |
|---|
| 05-02-1991 | INES 1 | PRESSURIZER DISCHARGE TANK MEMBRANE RUPTURE | KOZLODUY-2, Bulgaria |
| 06-12-1990 | INES 1 | TURBINE SJAES STEAMING DUE TO PLANT PERSONNEL ERROR | SMOLENSK-3, Russian Federation |
| 11-01-1991 | INES 1 | UNIT SHUTDOWN DUE TO SG-4 PULSE LINE RUPTURE | NOVOVORONEZH-5, Russian Federation |
| 31-03-1991 | INES 1 | WRONG POSITIONING OF THE FUEL ASSEMBLY WHILE PERFORMING FUEL ROD CLADDING INTEGRITY TEST | KOLA-2, Russian Federation |
| 11-05-1991 | INES 1 | UNPLANNED EXPOSURE OF PERSONNEL DURING REFUELLING | KOZLODUY-5, Bulgaria |
| 01-06-1991 | INES 1 | UNIT SHUTDOWN DUE TO PERSONNEL ERRORS AND DAMAGE TO RCP 6 KV BREAKER | KALININ-2, Russian Federation |
| 01-01-1990 | INES 1 | FUEL BUNDLE LATTICE SPACING FAILURES | LOVIISA-1, Finland |
| 28-05-1991 | INES 1 | FUEL ASSEMBLY TILTED OVER DURING CORE LOADING | RINGHALS-2, Sweden |
| 15-07-1991 | INES 1 | FIRE IN LOW LEVEL RADIOACTIVE WASTE STORAGE | KOZLODUY-1, Bulgaria |
| 18-07-1991 | INES 1 | EARTHQUAKE IN CENTRAL EUROPE | KOZLODUY-1, Bulgaria |
| 18-07-1991 | INES 1 | REACTOR SCRAM AND COOLDOWN BECAUSE OF LEAKAGE IN A PRIMARY CIRCUIT MEASURING SYSTEM | PAKS-1, Hungary |
| 22-07-1991 | INES 1 | CONTAMINATION OF SOIL ON SITE | KOZLODUY-1, Bulgaria |
| 06-08-1991 | INES 1 | NEW RADIOACTIVE "HOT SPOTS" DISCOVERED AT KOZLODUY NPP | KOZLODUY-1, Bulgaria |
| 08-09-1991 | INES 1 | INADVERTENT STEAM RELEASE INTO THE REACTOR HALL DUE TO STOP OF PUMP IN RESIDUAL HEAT REMOVAL SYSTEM | BARSEBECK-2, Sweden |
| 14-08-1991 | INES 1 | DEVIATION FROM OPERATING INSTRUCTIONS | OSKARSHAMN-2, Sweden |
| 14-09-1991 | INES 1 | SMALL STEAM LEAK FROM THE MAIN FALNGE OF THE PRIMARY COOLANT PUMP NO. 6 | KOZLODUY-4, Bulgaria |
| 20-09-1991 | INES 1 | INCREASE ACTIVITY OF WASTE WATER FROM THE A-1 AND V-1 NPPS | BOHUNICE-1, Slovakia |
| 18-09-1991 | INES 1 | ONE FUEL ASSEMBLY TILTED DURING REFUELLING | RINGHALS-4, Sweden |
| 10-09-1991 | INES 1 | REVEAL OF INADVERTENTLY CLOSED MANUAL SERVICE VALVES AT VERIFICATION TESTS OF THE SCRAM SYSTEM BEFORE PREPARATIONS TO RESTART | FORSMARK-2, Sweden |
| 10-06-1992 | INES 1 | CONTAMINATED PARTICLES DISCOVERED ON-SITE | KOZLODUY-1, Bulgaria |
| 06-12-1991 | INES 1 | DEVIATION FROM THE NORMAL ON-LOAD REFUELING REGIME DUE TO FUEL ASSEMBLY SEPARATION FROM THE CONNECTING BAR | SMOLENSK-3, Russian Federation |
| 04-06-1992 | INES 1 | INOPERABILITY OF HERMETIC COMPARTMENT PRESSURE INDICATORS OF ESFAS | DUKOVANY-2, Czech Republic |
| 04-09-1990 | INES 1 | REACTOR START UP WITH DEGRADED REACTOR SHUT DOWN SYSTEMS | LEIBSTADT, Switzerland |
| 22-09-1992 | INES 1 | SMALL FIRES CAUSED BY SHORT-CIRCUIT | KOZLODUY-5, Bulgaria |
| 18-08-1992 | INES 1 | LOW ACTIVITY BORATED WATER LEAK FROM MAKE-UP SYSTEM | DUKOVANY-1, Czech Republic |
| 16-04-1992 | INES 1 | DEGRADED WATER CHEMISTRY IN THE PRIMARY CIRCUIT DUE TO CEMENT MORTAR INGRESS INTO THE BORATED WATER STORAGE TANK | KOLA-2, Russian Federation |
| 06-07-1992 | INES 1 | FAILURE OF TWO DIESEL GENERATORS WHILE ROUTINE TESTING DURING UNIT MAINTENANCE | BALAKOVO-2, Russian Federation |
| 15-10-1992 | INES 1 | LEAKAGE OF REACTOR CIRCUIT PIPE 76 MM DIAMETER FROM REACTOR CHANNEL 32-24 TO THE DRUM SEPARATOR | IGNALINA-2, Lithuania |
| 12-11-1992 | INES 1 | UNIT OPERATION WITH ONE REACTOR PROTECTION SYSTEM CHANNEL OUT | SOUTH UKRAINE-2, Ukraine |
| 13-12-1992 | INES 1 | REACTOR SHUTDOWN BY THE ACTUATION OF THE EMERGENCY PROTECTION SYSTEM FOLLOWED BY NON-COMPLIANCE WITH THE SAFE OPERATING LIMITS ON STEAM GENERATOR COOLDOWN RATE | ROVNO-2, Ukraine |
