Half-way reached in the annual outages at Olkiluoto nuclear power plant
The refueling outage of Olkiluoto 1 has been completed. The plant unit was reconnected to electricity generation on 14 May at 7.34 am. Full power was reached on Saturday, 16 May at 1.42 am. The service outage of Olkiluoto 2 started according to plan on Sunday, 17 May. OL2 was disconnected from the national grid at 5.42 pm.
Activities carried out in the 36th annual outage at OL1 plant unit included in addition to refueling some maintenance and repair operations and testing. A mixing unit in the feedwater line was also replaced. The outage was completed 1.5 days behind schedule.
OL2 underwent a longer service outage expected to take approximately 15 days. Apart from refueling, the major activities to be carried out include low-voltage equipment replacement in two subsystems and renewal of both feedwater mixing units. According to the preliminary plan, the outage will be completed on 1 June.
In addition to TVO's own personnel, up to 800 subcontractors will be involved in the annual outages.
As good as new
The refueling and maintenance service outages carried out in alternate years at the plant units ensure that Olkiluoto nuclear power plant is kept in excellent condition at all times.
The annual outages are executed on the basis of maintenance and replacement programs specified in detail for each device and component. Good advance planning is utilized to prevent failures in equipment and components important to safety or production. TVO also implements extensive modernization projects at the plant units about every five years.
For more information, please contact:
Mikko Kosonen, Senior Vice President, Production, tel. +358 2 8381 2100.
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