Map of Slovenia

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Nuclear installations in Slovenia

Slovenia has

  • one operating nuclear power plant
  • one nuclear research reactor
  • one central radioactive waste storage for low and intermediate level solid radioactive waste from non-power users of nuclear energy and
  • one uranium mine in a decommissioning stage.

Krsko Nuclear Power Plant

Krsko Nuclear Power Plant is situated on the Sava river in the south-eastern part of Slovenia. It is a Westinghouse 632 MWe two loop PWR. The basic safety features of the plant are typical for a two-loop Westinghouse plant. Construction started in 1974. Commercial operation started in August 1982.

The Krsko NPP was built as a joint project of the electric utilities of Slovenia and those of neighbouring Croatia.

Energy production of the Krsko NPP is shared 50:50 between electrical utilities of both the countries. The Krsko NPP is one of the main pillars of the Slovenian power system, generating base load electricity. The total installed generating capacity in Slovenia during 1997 was 2401 MW, the thermal share was 42%, with hydro at 32% and nuclear 26%. In terms of electricity generation, the nuclear contribution was 40% of the total production in Slovenia. Therefore the Slovenian share covered about 20 % of the country's consumption.

The safety features of Krsko NPP design are based on the requirements of the US Nuclear Regulatory Commission (NRC) of 1973. Westinghouse as the main contractor, was responsible for the implementation of these requirements during the design, construction and testing phases.

Radioactive Waste Management:

The capacity of the storage for low and intermediate level waste (LILW) at the NPP site will run out by 2010. Therefore ARAO, the Slovenian agency for radwaste management, started 1999 to search for a site for a repository. Until Aptil 2005 eight Slovenian communities declared themselves interested in offering a site. In three of these communities field investigations will be started and will go on for approximately three years till the final selection of one site. The operation is planned to start in 2013.

Solid radioactive waste and spent nuclear fuel are stored within the plant area. Solid radioactive waste is treated and then packed into steel drums, which are then stored in the Solid Waste Storage. Spent nuclear fuel is stored under water in the Spent Fuel Pit.

Research Reactor TRIGA Mark II

The Research Reactor TRIGA Mark II of the Jozef Stefan Institute is situated in the vicinity of Ljubljana and has a 250 kWth General Atomic pool reactor. TRIGA was initially licensed in 1966 as an IAEA project and was re-licensed for steady state and pulse operation after refurbishment and reconstruction in 1992.

Uranium Mine Zirovski Vrh

Zirovski Vrh Uranium Mine and Mill was in operation in the period of 1985 to 1990. Its lifetime production was 607,700 tons of ore corresponding to 452.5 tons (Uranium equivalent) of yellow cake. Both the mine and the mill is undergoing decommissioning and re-mediation of one surface disposal of 1,548,000 tons of mine waste and red mud, and another 593,000 tons of mill tailings.

News in the nuclear sector

Feb. 2010: Application for second reactor in Krsko

"An application towards a second reactor at Slovenia's Krsko nuclear power plant has submitted to the country's ministry of economy by GEN Energija.

GEN Energija said that the application was supported by technical studies and analysis that show that the construction of new reactors is justified from energy, economic and environmental perspectives. The plant, it said, would provide a sufficient, reliable and safe supply of electricity at competitive and long-term predictable prices and with virtually no greenhouse gas emissions.

In Slovenia, government permission must be obtained for any power facility with a generating capacity of more than 1 MWe before siting procedures can begin. In an application, the minister of economy must be provided with information on the type and size of the proposed plant, conditions for the supply of energy from the plant, as well as plans for its decommissioning at the end of its operating life. In its application, GEN Energija formally verified that the project to construct a second reactor at Krsko is in line with Slovenia's energy policy.

Plans call for a new reactor of some 1000 MWe capacity to be built at Krsko. A parliamentary decision on the new unit is expected later this year. If approved, serious and detailed planning could begin with the aim of completing the unit between 2020 and 2025, at a cost estimated by GEN Energija of up to €5 billion ($7 billion).

A 696 MWe Westinghouse reactor is currently in operation at Krsko, which is jointly owned by Croatia. Construction started in 1975 and it was connected to the grid in 1981, entering commercial operation in 1983. Its operational life was designed to be 40 years, but a 20-year extension is being sought.

The plant’s operating company Nuklearna Elektrarna Krsko (NEK) is co-owned by GEN Energija, a subsidiary of state-owned Elektro-Slovenija (ELES), and the Croatian state-owned company Hrvatska Elektroprivreda (HEP). The Krsko plant currently provides more than one-quarter of Slovenia's and roughly one-fifth of Croatia's electricity.

The new unit at Krsko would be entirely owned by Slovenia. Croatia is considering building a new 1000 MWe nuclear plant of its own, in Eastern Slavonia, near the Serbian border. "


Sites With Nuclear Facilities

siteplantreactor typconstruction startoperation startshut down
KrskoKrskoPWR 63019751981
Zirovski VrhZirovski VrhUranium mine