Safe use of the Olkiluoto nuclear power plant is based on competent and responsible personnel, high-quality plant technology, principle of continuous improvement and independent internal and external supervision. TVO’s activity-based management system meets the requirements of the ISO 9001 standard. In order to ensure safe operation, TVO systematically estimates the level of safety and safety culture, and the entire TVO personnel is committed to observing a high-quality safety culture.
TVO regularly assesses the state of its overall safety from the viewpoints of production, nuclear safety, safety and service life management as well as management, organization and personnel. The overall level of safety is good.
The state of the safety culture is regularly assessed according to the IAEA procedure. TVO’s safety culture is estimated to be at a level at which the strategic importance of safety has been recognized and preventative practices are observed. TVO aims at reaching the highest possible level of safety culture. TVO has continued to employ various measures to maintain and develop the Company’s safety culture.
The Company regularly assesses the operations of its plant units with the help of internationally used safety indicators. Of the safety indicators, collective radiation dose, unplanned energy unavailability factor and unplanned automatic scrams realization are described in Table “Objectives and results of TVO’s responsibility principle” (see “Responsibility”).
The Olkiluoto nuclear power plant units, OL1 and OL2, operated safely throughout the year. TVO classifies events affecting nuclear safety in accordance with the international INES scale (0–7). In 2018, the Olkiluoto nuclear power plant had 9 INES classified issues, of which 8 incidents classified as level 0 (No safety significance) and 1 (Anomaly). In case of special situations and operational disruptions, the Company submits separate, incident-specific reports to the Radiation and Nuclear Safety Authority in Finland (STUK) with plan of corrective measures. TVO publishes information on every event with public interest on the company website in the News section.
