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Oskarshamn 1 is Sweden’s first commercial nuclear power plant. An order was placed to the company formerly known as Asea on July 14th, 1965. The plant was connected to the electric power grid for the first time in 1971 and inaugurated in 1972. An extensive renovation of O1, called project Fenix, was ongoing between 1993 and 1995. Project Fenix drew a lot of attention since it was the first time work was done on a reactor while it was in operation. An investigation was also completed during the project to evaluate any future need for modernisation. This in turn led to two additional modernisation projects, called Max and Mod.
Project Max was completed in 1998 and was carried out in five different stages, which involved changing the moderator-tank, the moderator-tank upper head and the steam containment isolation valve. Project Mod was carried out in 2002 and included a new safety concept, a new reactor control system and reactor protection system, along with a renovation of the control room and a new turbine. Changing the turbine resulted in a 22 MW efficiency increase.
A few facts
| Construction began |
1966 |
| Start-up |
1972 |
| Gross output |
491 MW |
| Highest annual production |
3.5 TWh in 2004 |
Page updated Tuesday, August 04, 2009
Printed Saturday, February 04, 2012
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