date  | INES | title | location |
|---|
| 04-03-1991 | INES 2 | INOPERABILITY OF VALVES OF SAFETY SYSTEMS | GRAVELINES-6, France |
| 27-03-1991 | INES 0 | UNIT SHUTDOWN DUE TO PRIMARY CIRCUIT LEAK IN THE LINE OF CONTROLLED LEAKS FROM THE MAIN ISOLATION VALVE SEAL | SOUTH UKRAINE-1, Ukraine |
| 28-03-1991 | INES 0 | UNIT SHUTDOWN DUE TO SHORT CIRCUIT IN THE AUXILIARY POWER TRANSFORMER AND LEAKING OIL FIRE | LENINGRAD-3, Russian Federation |
| 31-03-1991 | INES 1 | WRONG POSITIONING OF THE FUEL ASSEMBLY WHILE PERFORMING FUEL ROD CLADDING INTEGRITY TEST | KOLA-2, Russian Federation |
| 10-04-1991 | INES 3 | UNAVAILABILITY OF LOW POWER EMERGENCY PROTECTION (LPEP) DUE TO LOSS OF IONIZATION CHAMBER POWER SUPPLY | CHERNOBYL-1, Ukraine |
| 12-04-1991 | INES 2 | FIRE IN SWITCHGEAR BUILDING | OLKILUOTO-2, Finland |
| 29-04-1991 | INES 2 | VIOLATION OF SAFETY REGULATIONS AT A WORKSHOP IN THE FUEL FABRICATION PLANT | PIERRELATTE, France |
| 04-05-1991 | INES 3 | PERSONNEL OVEREXPOSURE DURING PRECOMMISSIONING OPERATIONS INVOLVING HOT CELL | IGNALINA-2, Lithuania |
| 09-05-1991 | INES 2 | ISOLATION OF FUEL OIL TO ESSENTIAL GAS TURBINES | HINKLEY POINT-B UNIT A, United Kingdom |
| 11-05-1991 | INES 1 | UNPLANNED EXPOSURE OF PERSONNEL DURING REFUELLING | KOZLODUY-5, Bulgaria |
| 12-05-1991 | INES 3 | RELEASE OF ACTIVE LIQUID FROM STORAGE TANK | BOHUNICE-1, Slovakia |
| 16-05-1991 | INES 2 | FAILURE OF SAFETY SYSTEM TRAIN WHILE ROUTINE TESTING | KOLA-3, Russian Federation |
| 24-05-1991 | INES 2 | UNAVAILABILITY OF REACTOR LEVEL MEASUREMENT | BELLEVILLE-2, France |
| 28-05-1991 | INES 1 | FUEL ASSEMBLY TILTED OVER DURING CORE LOADING | RINGHALS-2, Sweden |
| 01-06-1991 | INES 1 | UNIT SHUTDOWN DUE TO PERSONNEL ERRORS AND DAMAGE TO RCP 6 KV BREAKER | KALININ-2, Russian Federation |
| 12-06-1991 | INES 2 | PARTIAL INOPERABILITY OF THE REACTOR PROTECTION SYSTEM | CATTENOM-4, France |
| 15-06-1991 | INES 2 | TEMPERATURE TRANSIENT DURING START-UP | BRADWELL UNIT A, United Kingdom |
| 22-06-1991 | INES 2 | DEFECTIVE WELDS IN LOW PRESSURE SAFETY INJECTION SYSTEM | BELLEVILLE-2, France |
| 01-07-1991 | INES 2 | NEW FUEL ASSEMBLY DROPPING WHILE REFUELING | CHERNOBYL-2, Ukraine |
| 10-07-1991 | INES 2 | INADVERTENT DILUTION OF THE PRIMARY FLUID DURING A COLD SHUTDOWN | BELLEVILLE-2, France |
| 10-07-1991 | INES 3 | RADIOACTIVE WATER SPILLAGE ON THE PLANT TERRITORY WHILE TRANSPORTING CASK WITH FUEL FRAGMENTS TO THE DRY RADWASTE REPOSITORY | BILIBINO GEN, Russian Federation |
| 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 |
| 22-07-1991 | INES 3 | BREACH OF UNIT LIMITING CONDITIONS FOR OPERATION WHILE PREPARING FOR RESTART AFTER MAINTENANCE DUE TO ECCS AND MSV UNAVAILABILITY | SMOLENSK-2, Russian Federation |
| 01-08-1991 | INES 2 | DEFECT IN THE COATING OF THE SUMPS (1300 PLANTS) | PALUEL-2, France |
| 06-08-1991 | INES 1 | NEW RADIOACTIVE "HOT SPOTS" DISCOVERED AT KOZLODUY NPP | KOZLODUY-1, Bulgaria |
| 10-08-1991 | INES 2 | PRIMARY WATER SPILLAGE WHILE REPAIR OF THE GATE VALVE AT RCP SUCTION DURING SCHEDULED MAINTENANCE | CHERNOBYL-2, Ukraine |
| 14-08-1991 | INES 1 | DEVIATION FROM OPERATING INSTRUCTIONS | OSKARSHAMN-2, Sweden |
