Olkiluoto 3, a nuclear power plant in Finland, has experienced technical issues during its annual maintenance. Due to these issues, the estimated completion date of the maintenance process has been extended by six days, with a new completion date set for May 4th. Initially scheduled to last 37 days and begin on March 2nd, the maintenance timeline has been pushed back on four separate occasions due to slower cooling of components and additional technical problems. The reactor began full power production in March 2023.