Posiva Oy is an expert organisation responsible for the final disposal of spent nuclear fuel of the owners. Posiva has been e ... stablished in 1995. Posiva's People Posiva employs around 100 people. The company had a turnover of some EUR 63,2 million in 2013 and is headquartered in Olkiluoto, Finland in the municipality of Eurajoki. The personnel works in three locations: Main Office in Olkiluoto, ONKALO Project Office in Olkiluoto and Vuojoki Mansion in Eurajoki. Posiva's Owners Posiva is owned by Teollisuuden Voima Oyj (60%) and Fortum Power & Heat Oy (40%), both of which share the cost of nuclear waste management. Extensive Co-operation Posiva works together with numerous Finnish and foreign expert organisations from a multitude of fields, and commissions studies related to nuclear waste management from universities and other institutions of higher education as well as from research institutes and consulting businesses. read more