STUK performs the following inspections to ensure the operational safety of existing plant units:
Periodic inspections that STUK has specified and recorded in the facility-specific periodic inspection program
Inspections required by the YVL Guides that the licensee is obliged to request as part of the measures carried out at the facility or that STUK conducts at its discretion
Regulation by local inspectors at nuclear power plants
Safety assessment on the basis of operating experience and safety research as well as other information obtained after the granting of the operating license
In operating experience feedback activities, the focus is on plant events that have been reported to the authority with an operating event report which according to the reporting regulations is required to be submitted of all abnormal operating conditions. STUK reports on special cases to such an extent as it considers appropriate to the International Atomic Energy Agency (IAEA) and the OECD’s Nuclear Energy Agency (NEA) via the IRS system (Independent Reporting System). Depending on the case, STUK decides on the classification of the seriousness of an event on the International Nuclear Event Scale (INES).