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Company typeOy
Founded1995 (1995)
HeadquartersEurajoki, Finland
ProductsNuclear waste management
OwnerTeollisuuden Voima and Fortum

Posiva Oy is a Finnish company with headquarters in the municipality of Eurajoki, Finland. It was founded in 1995 by Teollisuuden Voima (60% of stock) and Fortum (40% of stock),[1] two Finnish nuclear plant operators, for researching and creating a method of final disposal of spent nuclear fuel from their plants.[2][3][4]

For this purpose, Posiva is currently constructing the Onkalo spent nuclear fuel repository, the world's first deep geological repository, at the Olkiluoto Nuclear Power Plant site.


  1. ^ Posiva's website
  2. ^ "Nuclear waste tomb soon to reach final depth". Helsingin Sanomat. 10 May 2010. Retrieved 12 August 2012.
  3. ^ "Approval for expanded Olkiluoto repository". World Nuclear News. 4 June 2009. Retrieved 12 August 2012.
  4. ^ "Finnish nuclear waste may rest in peace". This Is Finland. September 2011. Retrieved 12 August 2012.