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02.07.2010 09:37

Finnish Parliament approves extension of the final disposal facility for the Olkiluoto 4 unit

The Finnish Parliament approved the extension of Posiva's final disposal facility for spent nuclear fuel from the Olkiluoto 4 unit on 1 July 2010 by 159 votes to 35. The extension will increase the capacity of the final disposal facility by 2,500 uranium-tons of spent nuclear fuel.

According to the decisions-in-principle ratified by Parliament in 2001 and 2002, a maximum of 6,500 uranium-tons of spent nuclear fuel can be disposed of in Olkiluoto, which is estimated to accumulate over 50–60 years of use of the current four plant units and the Olkiluoto 3 unit currently under construction.


The final disposal of spent nuclear fuel from the Olkiluoto 4 unit would begin in the 2070s at the earliest if the reactor is commissioned at the end of the 2010s. The extension has no effect on the basic technical implementation of final disposal. The impacts of the extension mainly concern the underground disposal facilities. The need for additional space has been considered in the planning of the final repository. With the extension, the underground final repository will extend to an area of some 190 hectares.

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