Posiva Oy
Posiva Oy is a FIN company active in the nuclear fuel chain as repository.
Owned by TVO and Fortum, and the organisation that got further than anyone else: Onkalo is the first deep geological repository for spent fuel anywhere to be built. Construction is complete and the encapsulation plant has been tested with dummy fuel, pending an operating licence.
| Headquarters | Eurajoki, Finland |
|---|---|
| Founded | not recorded |
| Ownership | private |
| Roles in the chain | repository |
Position in the chain
Facilities
| Facility | Stage | Country | Capacity / output | Status |
|---|---|---|---|---|
| Onkalo | repository | FIN | not disclosed | construction |
Posiva Oy in context
Posiva Oy has 1 facility on record in 1 country (Finland): 0 operating and 1 planned, licensing or under construction.
How these are worked out: shares and ranks use the world totals cited in the table, and only named companies are ranked (unnamed or country-level entries in a source are not). A facility with no stated capacity is counted as a facility but adds nothing to a capacity figure. Vendor figures count operating units where this company is the recorded reactor vendor; ages count from the start-up year on record, and build times run from construction start to grid connection, as on the age and build-times pages.
Sources
- Posiva Oy, company source
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data