The Loviisa nuclear power plant consists of two plant units, Loviisa 1 and Loviisa 2. The plant units generate a combined eight terawatt-hours (TWh) of electricity annually for the national grid. That covers of about one-tenth of Finland's electricity production. In terms of availability, Loviisa ranks among the world's best nuclear power plants.
The key figures measuring the Loviisa nuclear power plant's safety and performance reliability have been good throughout its operational history. The annual load factors have risen close to and even exceeded 90%. The number of actual serious disturbances has been very low. Loviisa nuclear power plant produces base load electricity for continuous, year-round needs.
Internationally, plant safety, operations and maintenance is often evaluated by the number of unplanned automatic scrams (UA7). The International Nuclear and Radiological Event Scale (INES) is used as a tool to communicate the radiation or nuclear safety significance of the reported incidents in the. Levels 1-3 are termed "incidents, levels 4-7 "accidents". Incidents below INES 1 have no safety relevance with respect to radiation or nuclear safety. INES 1 rated incident means a degradation of defence in depth.
Unplanned automatic scrams per 7000 hours critical (UA7)
The International Nuclear and Radiological Event Scale (INES) incidents at the Loviisa power plant
||2 (INES 1)