Oskarshamn 2
The big sibling O1 was still five years away from opening when planning began for a second nuclear power plant in Oskarshamn. Here's the what, how and why.
In 1967, two years after the order to Asea to build the O1 was placed, planning for the O2 began. Five years later, in 1974, the reactor was commissioned. Originally, the O2 had an output of 580 MW, and later, in 1982, its output was increased to 630 MW.
When OKG's main owner E.ON made the decision in 2015 to close O1 and O2 prematurely, O2 was in the middle of an extensive modernization. In 2007, 2009 and 2013, the most important stages had been completed, including the replacement of the low-pressure turbine and the rebuilding of the control room. In connection with the modernization of the O2, the education and training of control room personnel was also moved from Studsvik to a newly built simulator, located at Simpevarp. The last step was to have been completed in 2015, but was interrupted by the shutdown decision.
At the time of closure, the reactor was 41 years old and had produced 154 TWh during its lifetime. At O2, the large-scale dismantling and demolition of the reactor is now underway.
Quick facts about O2
O2 has the same design as the two Barsebäck reactors in Skåne.
- Construction start: 1969
- Start of operation: 1974
- Maximum gross power: 661 MW
- Maximum net power: 638 MW
- Thermal power: 1 800 MW
- Best production year: 2010 with 5.0 TWh
- Decommissioned: 2015
- Total production: 154 TWh