| date | INES | title  | location |
|---|
| 02-02-1993 | INES 1 | UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADO | KOLA-3, Russian Federation |
| 02-02-1993 | INES 1 | UNIT SCRAM CAUSED BY GRID DISTURBANCES DUE TO TORNADO | KOLA-4, Russian Federation |
| 18-03-1991 | INES 0 | UNIT OUTAGE ON CLASS-IV FAILURE | KALPAKKAM-2, India |
| 12-11-1992 | INES 1 | UNIT OPERATION WITH ONE REACTOR PROTECTION SYSTEM CHANNEL OUT | SOUTH UKRAINE-2, Ukraine |
| 31-07-1992 | INES 0 | UNIT NO. 2 REACTOR SCRAM ON PRM HIGH FLUX | TARAPUR-2, India |
| 19-06-1992 | INES 0 | UNIT NO. 1 SCRAM ON PRM CH. 6 & IRM CH. 9 KICKING UP DURING FUNCTIONAL CHECKS | TARAPUR-1, India |
| 10-07-1991 | INES 0 | UNIT NO. 1 REACTOR SCRAM ON PRM HIGH FLUX | TARAPUR-1, India |
| 16-07-1991 | INES 0 | UNIT NO. 1 REACTOR SCRAM ON PRM HIGH FLUX | TARAPUR-1, India |
| 03-12-1995 | INES 0 | UNIT COLD SHUT DOWN BECAUSE OF THE FLAW IN PIPELINE OF THE PRIMARY MAIN COOLANT PUMP | ZAPOROZHE-1, Ukraine |
| 15-06-1994 | INES 1 | UNINTENTIONAL SLOW INSERTION OF ALL CONTROL RODS | FORSMARK-3, Sweden |
| 10-07-1995 | INES 1 | UNINTENTIONAL RELEASE TO THE SEA OF A MINOR AMOUNT OF SLIGHTLYCONTAMINATED WATER | BARSEBECK-1, Sweden |
| 04-06-2008 | INES 0 | Unidentified leakage from the primary circuit in excess of TS limit | KRSKO, Slovenia |
| 27-08-2003 | INES 0 | Unexpected closure of the main steam line isolation valve caused reactor trip | KRSKO, Slovenia |
| 19-07-2001 | INES 1 | Underdimensioned rupture disc installed in the FILTRA-system | BARSEBECK-2, Sweden |
| 02-08-2013 | INES 2 | Uncontrolled release of radioactive effluents into the public sewerage system | Bordeaux university hospital, France |
| 13-11-1993 | INES 2 | UNCONTROLLED POWER TRANSIENT IN A TEST REACTOR WITH DEGRADATION OF THE TESTED IRRADIATED FUEL NEEDLE | BR2, Belgium |
| 03-05-1993 | INES 1 | UNCONTROLLED INCREASE OF REACTOR POWER | PAKS-4, Hungary |
| 11-03-1997 | INES 2 | Uncontrolled entry into room under reactor vessel during refuelling outage | KOEBERG-2, South Africa |
| 05-10-2006 | INES 2 | Unavailabilty of containment cooling fans | DOEL-1, Belgium |
| 22-01-1992 | INES 2 | UNAVAILABILITY OF THE IODINE FILTERING OF REACTOR CONTROL ROOM VENTILATION SYSTEM | DAMPIERRE-1, France |
| 11-01-2024 | INES 2 | Unavailability of Reactor protection system of unit 3 | DUKOVANY-3, Czech Republic |
| 24-05-1991 | INES 2 | UNAVAILABILITY OF REACTOR LEVEL MEASUREMENT | BELLEVILLE-2, France |
| 10-04-1991 | INES 3 | UNAVAILABILITY OF LOW POWER EMERGENCY PROTECTION (LPEP) DUE TO LOSS OF IONIZATION CHAMBER POWER SUPPLY | CHERNOBYL-1, Ukraine |
| 06-06-1998 | INES 2 | Unavailability of 1 out of 4 main steam safety and relief valve station | UNTERWESER, Germany |
| 12-09-2012 | INES 0 | Unauthorized movement | Colombo Fort, Sri Lanka |
| 07-02-1993 | [N/A] | UNAUTHORIZED INTRUDER INTO PLANT PROTECTED AREA WHILE OPERATING AT 100 PERCENT POWER | THREE MILE ISLAND-1, United States of America |
| 30-06-2001 | INES 1 | Unauthorized dismantling of a furnace containing Co-60 radioactive sources | S.C. Forever/ Calan, Romania |
| 22-11-2013 | INES 1 | Two radioactive sources containing Co-60 lost or stolen | Bełchatów Power Station (coal-fired power plant), Poland |
| 01-07-1997 | INES 1 | Two out of four diesel generators unavailable due to loose connection to the voltage regulator | RINGHALS-2, Sweden |
| 21-11-1995 | INES 3 | Two occupational workers were injured by exposure of electron accelerator | TIANJIN, China |
