Slovenia is a signatory of the nuclear Non-Proliferation Treaty (NPT) and has signed and ratified the Comprehensive Test Ban Treaty (CTBT).

Slovenia has one Westinghouse 632 MW reactor situated on the banks of the Sava River, 75 km from Ljubljana located at Krsko. Krsko is in a unique position in that it is owned jointly by two countries, Slovenia and Croatia, each having a 50% stake, with each supposed to receive half the electricity produced.

The Slovenian Government has a long-term policy of phasing out nuclear power and it is therefore not anticipated that any more nuclear power plants will be constructed.

In December 2004 the State secretary of energy, Djordje Zebeljan, announced that feasibility studies would be initiated on extending the Pressurized Water Reactor's current 40-year design lifetime, due to expire in 2023.