Slovenia’s fund for the future decommissioning of the Krško nuclear power plant generated €39.6 million in revenue in 2025 and posted an annual investment return of 4.26%. The market value of the fund’s portfolio reached €260.35 million, up 2.5% from 2024. After expenses, the fund reported a surplus of €2.56 million.
Established in 1994, the Slovenian fund supports Slovenia’s share of dismantling Krško and managing radioactive waste and spent nuclear fuel. Slovenia and Croatia jointly own the plant and each carry responsibility for half of the long-term obligations through separate national funding arrangements.
Slovenian contributions linked to GEN Energija electricity receipts
The Slovenian fund is primarily financed through mandatory payments by GEN Energija. The company contributes €0.012 for every kWh of electricity received from Krško. Contributions reached just under €33.3 million in 2025, with a similar amount expected during 2026.
Payments exceeded €9 million in the first quarter of 2026. This payment stream is part of the mechanism used to build assets for future decommissioning and radioactive-waste-related obligations.
Croatia’s larger portfolio and HEP quarterly payments
Croatia’s fund held assets worth €466.8 million at the end of 2025, substantially higher than the Slovenian portfolio value. Croatia finances its obligations through quarterly payments from state-owned utility HEP. HEP contributed €7.52 million during 2025.
The difference between portfolio values does not on its own indicate which country is better funded. The adequacy of each fund depends on updated decommissioning-cost estimates, expected plant life, future investment returns, radioactive-waste arrangements, and when expenditures are scheduled.
Investment returns and operating-life assumptions affect funding needs
Investment performance remains relevant because decommissioning liabilities extend over decades. Even modest changes in long-term returns can affect the contribution burden placed on GEN Energija, HEP, and ultimately electricity consumers. Portfolios structured too aggressively can also introduce market risk into funds that must remain available when decommissioning begins.
Krško’s operating-life decisions influence the funding requirement as well. A longer operating period gives both funds more time to accumulate assets but can increase maintenance, waste-management, and final dismantling obligations.
The Slovenian fund’s 4.26% return supports the portfolio in nominal terms, while regular liability assessments remain necessary. The key relationship is between accumulated assets and the latest engineering estimate of the full decommissioning and waste-management cost .
