Serbia’s preliminary technical study on the peaceful use of nuclear energy marks a turning point in the country’s long-term energy planning, not because it commits to building a reactor, but because it frames nuclear power as a structurally necessary option within a system that is rapidly losing its traditional anchors. What emerges from the document is not a promotional case for nuclear, but a detailed systems-level assessment grounded in quantified demand projections, institutional gaps and infrastructure requirements that collectively redefine how Serbia must think about its energy future.
The study, prepared under the auspices of the Ministry of Mining and Energy, is structured along the methodology of the International Atomic Energy Agency (IAEA) Milestones Approach, which defines nuclear development as a phased national programme rather than a project. This framing is critical. Serbia is not evaluating a single asset, but the creation of an entirely new industrial and regulatory ecosystem that spans decades.
At the centre of the analysis is a projected structural increase in electricity demand. While the study avoids overly aggressive forecasts, it clearly signals that Serbia’s current consumption level—approximately 30–35 TWh annually—is expected to rise significantly by mid-century. Electrification of transport, industrial decarbonisation and the expansion of digital infrastructure are identified as primary drivers. In parallel, peak demand volatility is expected to increase, particularly during winter periods when hydropower output is constrained and heating demand surges.
This demand outlook intersects with a generation fleet that remains heavily dependent on lignite. Serbia’s state-owned utility, EPS, continues to rely on coal-fired plants for the majority of baseload supply, with installed coal capacity exceeding 4,000 MW. These assets, while still operationally central, face increasing pressure from European carbon policy, aging infrastructure and environmental compliance requirements. The study does not prescribe a fixed coal phase-out timeline, but it implicitly acknowledges that maintaining current levels of coal generation beyond the 2035–2040 horizon will become increasingly untenable.
Against this backdrop, the expansion of renewable energy is presented as both necessary and insufficient. Serbia has already begun accelerating its renewable pipeline, with wind and solar projects moving through auction schemes and private development channels. However, the study quantifies a key limitation: even with substantial renewable deployment, the system will face periods of low generation due to weather variability. In such conditions, reliance on imports becomes structurally embedded unless firm capacity is introduced.
This is where nuclear energy enters the analysis—not as a replacement for renewables, but as a complement that stabilises their integration. The study explicitly models nuclear as baseload generation with capacity factors in the range of 85–90%, significantly higher than wind or solar. This allows it to serve as a continuous supply backbone, reducing the need for balancing imports and mitigating curtailment risks during periods of excess renewable generation.
The capacity scenarios outlined in the study converge around a ~1,000 MW nuclear unit entering operation around 2040, with the possibility of additional units depending on demand evolution. At this scale, nuclear would account for approximately 15–20% of Serbia’s projected electricity mix, assuming continued growth in renewables. In absolute terms, a 1,000 MW reactor operating at high capacity factors could generate 7–8 TWh annually, equivalent to roughly a quarter of Serbia’s current consumption.
The technology assessment within the study is deliberately non-committal but analytically structured. Large conventional reactors—typically in the 1,000–1,600 MW range, such as European Pressurised Reactors or similar designs—are evaluated alongside Small Modular Reactors, which generally range between 50–300 MW per unit. The study recognises that large reactors offer proven performance and economies of scale, but at the cost of higher upfront investment and longer construction timelines, often exceeding 10–12 years.
SMRs, by contrast, are presented as a potentially more flexible solution, allowing phased deployment and lower initial capital commitments. However, the study is explicit about their current limitations. Commercial deployment remains limited, cost benchmarks are still evolving and supply chains are not yet fully established. As a result, Serbia’s strategy remains open-ended, with both pathways kept under consideration until further technological and market clarity emerges.
The financial implications of either pathway are substantial. While the study refrains from providing explicit cost estimates, it references international benchmarks that place large reactor CAPEX in the range of €6–10 billion per GW, depending on technology and financing structure. SMRs are estimated at €3–6 billion per GW equivalent, though these figures carry higher uncertainty due to limited deployment history. For Serbia, this translates into a single project representing a significant share of national GDP, underscoring the need for complex financing arrangements.
The study highlights several potential financing models, including:
- State-backed investment with sovereign guarantees
- Strategic partnerships with vendor countries (such as France, South Korea or the United States)
- Hybrid structures involving international financial institutions
In all scenarios, long-term revenue stability is identified as a prerequisite, likely requiring mechanisms such as power purchase agreements, capacity payments or regulated tariffs to ensure cost recovery over the plant’s operational lifetime, which typically exceeds 60 years.
Beyond generation and financing, the study devotes significant attention to institutional readiness. Serbia currently lacks a fully developed nuclear governance framework, and the report identifies 19 key infrastructure issues that must be addressed before any construction decision can be made. These include:
- Establishment of an independent nuclear regulatory authority
- Development of a comprehensive legal and licensing framework
- Creation of nuclear safety and radiation protection institutions
- Human resource development, including specialised engineering and operational training
The workforce dimension is particularly emphasised. Nuclear energy requires highly specialised skills across engineering, operations, safety and regulation. The study estimates that developing this human capital base will take at least 10–15 years, requiring coordinated efforts across universities, technical institutes and international partnerships.
Grid integration is another critical component. Serbia’s transmission system, operated by EMS, will require upgrades to accommodate large-scale nuclear generation, particularly in terms of load balancing and cross-border interconnections. A single 1,000 MW unit represents a significant addition to the system, necessitating reinforcement of transmission corridors and potentially new substations to ensure stable integration.
Waste management and fuel cycle considerations are addressed within the framework of international best practices. The study assumes that Serbia would initially rely on international fuel supply and potentially external spent fuel management arrangements, at least in the early stages of programme development. Long-term solutions, including domestic storage or participation in regional facilities, remain open questions that would need to be resolved in subsequent phases.
The timeline presented in the study reflects the complexity of these requirements. The current phase, focused on feasibility and institutional preparation, is expected to extend through 2025–2027. This would be followed by a decision phase involving technology selection, partner identification and financing structuring, likely extending into the early 2030s. Construction and commissioning would then span the remainder of the decade, with first electricity targeted around 2040.
This extended timeline introduces a critical strategic consideration. Serbia must make near-term decisions about a technology that will only deliver benefits in the long term, while simultaneously managing immediate system pressures. This creates a dual-track challenge: accelerating renewable deployment and grid modernisation in the short term, while laying the groundwork for nuclear integration in the long term.
The study also situates nuclear energy within Serbia’s broader European integration trajectory. As the European Union advances its decarbonisation agenda, access to low-carbon electricity becomes increasingly important for industrial competitiveness. Nuclear generation, by providing stable low-carbon power, could support Serbia’s export-oriented industries in maintaining access to EU markets, particularly under mechanisms such as the Carbon Border Adjustment Mechanism.
At the same time, the geopolitical dimension of nuclear development is implicit throughout the study. Technology selection will likely determine long-term partnerships, supply chains and financing structures, embedding Serbia within specific international frameworks for decades. This adds a layer of strategic complexity that extends beyond the energy sector.
Public acceptance is identified as a necessary condition for progress. The study emphasises the need for transparent communication, stakeholder engagement and adherence to the highest safety standards. While Serbia does not have a history of nuclear power generation, public perception will play a critical role in shaping the feasibility of any future programme.
What ultimately emerges from the study is a reframing of Serbia’s energy strategy. Nuclear energy is not presented as an immediate solution, but as a long-term structural option that addresses multiple system constraints simultaneously. It offers a pathway to reduce import dependence, stabilise a renewable-heavy grid and align with European decarbonisation trajectories. However, it also requires a level of institutional, financial and political commitment that extends far beyond conventional infrastructure projects.
The decision facing Serbia is therefore not simply whether to build a nuclear plant, but whether to undertake the transformation required to support it. The study provides the analytical foundation for that decision, quantifying the benefits, outlining the requirements and exposing the risks. The next phase will determine whether those insights translate into policy and, ultimately, into infrastructure that reshapes the country’s energy landscape for generations.
