Annual outages
Once a year, between July and October, the reactors of Loviisa nuclear power plant will be shut down for annual maintenance outages. The annual outage includes modifications and maintenance, inspections and refuelling. The outage is carried out on one plant unit at a time and it lasts for 2–8 weeks. Both power plant units undergo more extensive maintenance every four years. The most extensive annual outages, which are also the longest, take place every eight years.
Annual outages 2025
Unit 2: August 17 - September 18 Unit 1: September 6 - October 2
1.420
employees
5.000
activities
38 days
planned duration
General information on annual outages
During each annual outages, the fuel is changed, i.e. recharged. At any one time, approximately a quarter of the fuel filler is changed. Every eight years, an extensive annual maintenance is carried out to inspect the pressure vessel and its internal parts, which slightly increases the duration of the annual maintenance and carries out the most challenging modifications, repairs and inspections.
Annual outages are planned years in advance and are also reported to the electricity markets (Nord Pool) beforehand.
During the annual outages, the plant employs, in addition to its own staff, around 700-1 000 external contractors from around 100 different companies.
Each annual outages has a separate safety theme and a high level of attention is paid to safety at work. Human factors and clear communication are at the heart of all work. Safety at work focuses on lifting and transfer work, as well as work involving a risk of falling.
Upcoming outages
2026
LO2 Aug. 2 - Sept. 13
LO1 Sept. 19 - Oct. 11
2027
LO2 Aug. 15 - Sept. 3
LO1 Sept. 11 - 28
2028
LO2 Aug. 6 - Aug. 28
LO1 Sept. 2 - Oct. 14
