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

INES 2: Incident

Impact on People and Environment:
  • Exposure of a member of the public in excess of 10 mSv.
  • Exposure of a worker in excess of the statutory annual limits.
Impact on Radiological Barriers and Control:
  • Radiation levels in an operating area of more than 50 mSv/h.
  • Significant contamination within the facility into an area not expected by design.
Impact on Defence-in-Depth:
  • Significant failures in safety ­provisions but with no actual ­consequences.
  • Found highly radioactive sealed orphan source, device or transport package with safety provisions intact.
  • Inadequate packaging of a highly radioactive sealed source.
▸ Legenda & explanation
date title location 
1991-07-10INADVERTENT DILUTION OF THE PRIMARY FLUID DURING A COLD SHUTDOWNFranceBELLEVILLE-2
1991-07-01NEW FUEL ASSEMBLY DROPPING WHILE REFUELINGUkraineCHERNOBYL-2
1991-06-22DEFECTIVE WELDS IN LOW PRESSURE SAFETY INJECTION SYSTEMFranceBELLEVILLE-2
1991-06-15TEMPERATURE TRANSIENT DURING START-UPUnited KingdomBRADWELL UNIT A
1991-06-12PARTIAL INOPERABILITY OF THE REACTOR PROTECTION SYSTEMFranceCATTENOM-4
1991-05-31INCORRECT CALIBRATION OF SHUTDOWN SYSTEM AND TWO REGIONAL OVERPOWER DETECTORSCanadaPOINT LEPREAU
1991-05-24UNAVAILABILITY OF REACTOR LEVEL MEASUREMENTFranceBELLEVILLE-2
1991-05-16FAILURE OF SAFETY SYSTEM TRAIN WHILE ROUTINE TESTINGRussian FederationKOLA-3
1991-05-09ISOLATION OF FUEL OIL TO ESSENTIAL GAS TURBINESUnited KingdomHINKLEY POINT-B UNIT A
1991-04-29VIOLATION OF SAFETY REGULATIONS AT A WORKSHOP IN THE FUEL FABRICATION PLANTFrancePIERRELATTE
1991-04-12FIRE IN SWITCHGEAR BUILDINGFinlandOLKILUOTO-2
1991-03-04INOPERABILITY OF VALVES OF SAFETY SYSTEMSFranceGRAVELINES-6
1991-02-09STEAM GENERATOR TUBE BREAKJapanMIHAMA-2
1991-01-23UNIT SHUTDOWN DUE TO BREACH OF NORMAL OPERATION CONDITIONSUkraineZAPOROZHE-1
1991-01-15FIRE OF BUSES OF SECOND CATEGORY OF RELIABILITY BUSESSlovakiaBOHUNICE-2
1990-12-04LOSS OF ELECTRICAL OFF-SITE POWER AFFECTED THE FOUR UNITS LOAD REJECTION AND DIESEL GENERATOR FAILEDCzech RepublicDUKOVANY-1
1990-12-01ESSENTIAL BUS DEENERGIZATIONUkraineSOUTH UKRAINE-1
1990-10-04TG 2 TRIP DUE TO DEENERGIZATION OF 6 & 0.4 KV BUSES AND FAILURE OF TG STANDBY OIL PUMP TO STARTLithuaniaIGNALINA-1
1990-10-01IMPACT ON SAFETY DUE TO PARTIAL INOPERABILITY OF THE LONG TERM COOLING SYSTEM (WATER SUMP FILTERS)FrancePALUEL-1
1990-09-18SPURIOUS ACTUATION OF 2 MAIN SAFETY VALVES OUT OF TWELVELithuaniaIGNALINA-1
1990-08-22IMPACT ON SAFETY DUE TO INOPERABILITY OF A SAFETY SYSTEM DESIGNED FOR ACCIDENT MITIGATION (CONTAINMENT SAND FILTERS)FranceTRICASTIN-1
1990-07-05INOPERABILITY OF NEUTRON FLUX MEASUREMENT DURING COLD SHUTDOWNGermanyGREIFSWALD-5
1990-07-01IMPACT ON SAFETY DUE TO VIOLATION OF OPERATIONAL LIMITS AND CONDITIONS (IMPURITY DUE TO AIR INGRESS)FranceCREYS-MALVILLE
1990-02-23REACTOR COOLANT LEAK ON THE WATER CLEANING SYSTEM WHILE CONNECTED TO THE PRIMARY CIRCUITGermanyGreifswald
1990-01-23REACTOR COOLANT LEAK DURING ON POWER REFUELLING DUE TO FUELLLING MACHINE DROPCanadaBRUCE-4
1987-11-20CRITICALITY SHUT DOWN MARGIN MEASUREMENT STARTED WITHOUT HYDRAULIC SCRAM SYSTEM BEING OPERABLESwedenOSKARSHAMN-3
1974-08-20EXCESSIVE DEPRESSURIZATION OF THE PRIMARY CIRCUIT DUE TO A PRESSURIZER SAFETY VALVE THAT FAILED TO CLOSESwitzerlandBEZNAU-1