Common Nuclear Critiques
Nuclear projects have characteristics that require investors to consider specific risks, particularly around capital intensity, longer development periods, and project delivery that are difficult to price using conventional infrastructure frameworks.
The following information addresses some commonly raised criticisms and misconceptions using evidence to clarify where the risks are real, where they can be managed, and where perceptions may not reflect current experience. For a more detailed description of nuclear project risks, see Common Nuclear Project Risks: A Reference Table, which maps the principal nuclear project-specific financial risks by project stage, typical bearer, and primary mitigant.
Answer
Construction and completion risks are real, but it is a programme-design problem.
Evidence
Overruns concentrate in FOAK projects without recent build experience. Repeat builds show materially better performance.
Owner and vendor optimism bias and lack of reference plants or established track record can lead to unrealistic cost and schedule assumptions from the outset.
A lack of fleet-level visibility to capture learning curve effects, and insufficient upfront planning and project design work prior to FID can impact cost and schedule.
Barakah's four APR1400 units were delivered largely on schedule;[10]China starts construction of six-to-eight reactors per year. [11] The UK's Sizewell C is expected to cost less than Hinkley Point C (on the same design) and take less time to build.[12]
Trajectory
The industry is moving from FOAK projects towards repeatable designs, stronger supply chains, and more experienced delivery teams, which should improve cost and schedule predictability.
Answer
Government involvement enables private and institutional capital. Government support allocates and reduces risks that private investors are not well positioned to bear on their own often acting as a backstop for specific risk categories such as construction delay, political risk, or liability. By taking on risks, governments make projects financeable at a cost of capital private investors can accept.
Evidence
At early stages of industry and financial maturity, policy support and finely calibrated tools help lower and share risks among stakeholders and reduce a project’s capital cost and its cost of capital.
Government support today spans a spectrum, from direct procurement and underwriting to a more enabling role. The role and scale of government support will evolve according to risk allocation and market structure in each jurisdiction.
In Finland, the Mankala structure enabled existing nuclear build through joint ownership between power offtakers and state-backed utilities. Under the rate base approach, US and Canadian projects have relied on funding from privately owned or listed utilities. Sizewell C's equity consortium, for example, includes institutional capital alongside the UK government. [13] KEXIM provided $2.5 billion in debt for Barakah.[14] Sweden’s first new nuclear project vehicle VKAB is owned 20% by industrial consortium of private companies.
Trajectory
Government support calibrated for FOAK units is expected to ease as additional units are ordered and delivery experience builds. However, the scale of capital required means most projects will still need state funding, and off-balance-sheet structures to avoid overburdening any single sponsor.
Separately, as governments' capacity for direct fiscal support narrows, catalytic capital providers such as MDBs and philanthropic funds take initial steps to fill financing gaps traditionally covered by government support.
Some developers are also building larger balance sheets, which may reduce reliance on government backing to reach financial close over time.
Answer
Nuclear transactions can take time partly because there are limited repeat transactions and therefore limited standardisation of deal terms, risk allocation, and financing templates requiring substantial project-specific due diligence and documentation.
Evidence
The proliferation of nuclear designs and markets is producing more differentiated developer, owner, and sponsor organisations. As programmes mature from concept to delivery, owner strategies are expected to converge towards tangible, verifiable deliverables, with investor alignment and resource depth improving in parallel. This is already visible in delivery timelines. At Barakah, the time from fuel load to commercial operation fell by over four months between units 2 and 3, as operating teams applied experience from earlier units. [15]
Trajectory
Competent organization capability will strengthen as owners engage more with financial institutions. More open tendering should produce more reliable benchmarks as the market expands, transactions become more replicable and secondary markets gain in confidence.
Answer
Nuclear liability is legally channelled to the operator under international conventions, with the residual risk covered by a mature liability insurance market.
Waste management and decommissioning are pre-funded obligations through dedicated funds accumulated over the plant's operating life.
Evidence
Liability is legally channelled under international frameworks, protecting investors directly. Waste is funded from the outset via per-kWh levies in segregated funds, and decommissioning assurance is a licensing precondition, removing both from the investor's balance sheet.
Nuclear safety, security, and safeguards are governed by independent national regulators, operating within a framework of international treaties and IAEA standards.
Nuclear remains among the safest sources of electricity generation on a deaths-per-unit-of-energy basis.[16]
Trajectory
The strength of the international nuclear liability regime is anchored in the Paris and Brussels Conventions, which guarantee up to €1.5 billion for public compensation.
Finland's Onkalo facility, funded through the country's segregated waste levy, is on track to become the world's first operational deep geological repository for high level waste in 2026, demonstrating that disposal is a solvable engineering and financing problem, not an open-ended liability.
Answer
Nuclear's competitiveness is highly sensitive to financing costs because of its high upfront capital requirements. LCOE therefore varies significantly with the cost and structure of financing.
Evidence
The OECD Nuclear Energy Agency and International Energy Agency have reported that at a 3% discount rate, nuclear has the lowest LCOE of any electricity source studied. At 7-10%, its competitiveness erodes sharply[17]
System cost analyses[18] reinforce nuclear’s cost-effectiveness since they consider the additional integration, transmission, and balancing costs that variable renewables require, as well as the environmental externalities associated with fossil generation.
Trajectory
As delivery experience increases, project risks become better understood and financing structures become more established, which can reduce the risk premium and, in turn, the cost of capital. Standardised term sheets and financial structures across repeat projects reinforce this effect.
Secondary markets and syndication capacity are expected to further lower financing costs over time.
Answer
The investment thesis was always NOAK-at-scale, not the FOAK unit.
Evidence
China provides a relevant precedent. Construction costs have halved between the 1960s and 2000s.[19]
LWR-based SMRs (BWRX-300, NuScale, Rolls-Royce SMR) build on 60 years of proven reactor physics. In Canada, OPG’s own cost estimates for its planned Darlington SMR fleet project a cost reduction for units 2-4 compared to unit 1.[20]
Trajectory
Early projects generate the learning needed to establish credible NOAK costs and reduce technology, construction, and delivery risk. As these risks are lowered and repeatability improves, the financing mix could shift from predominantly equity towards greater use of debt and project finance.
Answer
Corporate PPAs are a well-established financing mechanism, but their use to support new nuclear projects is still emerging. The counterparties are familiar, creditworthy energy buyers, even if the application to nuclear is new.
Evidence
Hyperscalers drive large-scale SMR deployment. Their high-power loads, strong balance sheets, and long-term clean energy goals make them premium partners. A 20-year take-or-pay commitment from an investment-grade hyperscaler provides the same revenue stability as a utility offtake. Tech companies signed over 10 GW of nuclear agreements in 2025 alone covering existing or restarting large reactors as well as new SMR developments.[21]
Trajectory
The number of direct offtakers is growing beyond utilities to include industry, hyperscalers, and other large energy users. Revenue models are shifting towards market purchasing power and commercial terms alongside traditional cost-recovery mechanisms.
Answer
Large reactor finance plans are often multi-sourced and structured for syndication. There is an increasing variety of financial instruments available to the market at any ticket size.
Evidence
Sizewell C's equity consortium (UK government, EDF, Centrica, La Caisse, Amber Infrastructure) is a live model for how concentration risk is managed through syndication.[22]
Beyond large reactors, the nuclear value chain offers a continuous spectrum of ticket sizes and risk profiles: long-term operation, restarts, and uprates at existing plants; supply chain investment in manufacturing and components; exploration and mining; fuel cycle facilities (conversion, enrichment, fabrication); SMR and advanced reactor vendor equity (X-energy, NuScale, GE Hitachi, Rolls Royce among dozens of others) and dedicated nuclear funds (Brookfield Infrastructure Partners, PFYN, Nucleation, Segra Future Energy Fund) which allow entry through pool vehicles that spread capital across multiple projects.
Trajectory
The debt and equity toolkit is expected to expand, with support from non-traditional lenders, to include development-phase debt, more flexible construction debt, greater multilateral development bank capacity, and deeper secondary markets for syndication and risk participation, widening the range of achievable ticket sizes over time.
Answer
Policy risk cannot be eliminated, but it can be reduced through durable contractual, regulatory, and legislative frameworks that provide greater certainty around revenues and cost recovery.
Evidence
Government commitment to announced policies can be reinforced through standard contractual arrangements and, where necessary, legislation. PPAs, CfDs and RAB frameworks include government-backed contracts and are examples of mechanisms designed to reduce exposure to changes in political administration. As with all heavy infrastructure, government actions can improve or reduce project economic efficiency and financial confidence. See Developer and Investment Models for details on government’s role.
Trajectory
Government support structures are expected to meet value-for-money tests, such as EU state aid rules, as government and investor familiarity with nuclear improves. As programme design and economic oversight mature, support structures are likely to become more durable and less exposed to political discretion.
Answer
Some newcomer countries do face an institutional and regulatory gap, but this can be addressed through established international regulatory, institutional, and financing frameworks as national capability develops.
Evidence
The financing architecture for newcomer markets typically combines export credit agency support, development finance institution and multilateral development bank structuring, and sovereign-backed guarantees. This tends to work alongside the broader capabilities that give investors confidence: a credible regulator, a clear legal and liability framework, a competent owner, a well-defined government programme, and an appropriately structured financing package.
MDBs are broadening the available financing toolkit for nuclear.[23].
Commercial institutions typically enter through advisory work, political risk insurance, supply chain finance, and later-stage participation as markets mature.
Global philanthropy is planning strategies to complement legacy institutions, improving best practices, and accelerating access to nuclear energy.
Trajectory
Owner, developer, and sponsor organizations in newcomer markets are likely to become increasingly differentiated by their organizational capabilities as competent-organization capacity builds up. Government bodies’ capacity to enable and evaluate nuclear programmes is also improving as familiarity with the sector improves. Both trends are expected to narrow the institutional gap over time.
Nuclear liability, insurance, and legal frameworks: what investors must know
Nuclear projects involve certain liabilities and legal requirements with no direct parallel in conventional infrastructure. These relate to nuclear liability in the event of radiological release (nuclear safety), physical plant protection (nuclear security) and the accounting and management of fissile material (safeguards). Over multiple decades of continuous improvement, including through private sector participation, the industry has also developed and implemented frameworks for the management, treatment, and disposal of used nuclear fuel, and for plant decommissioning.[24]
These unique accountabilities sit with the nuclear operator/licensee, and can be, and have been, efficiently ring-fenced from external financiers without any degradation to the project’s safety profile. Decades of international legal work, alongside policy and finance partners, have produced a dedicated, mature framework that channels and caps investor exposure, mandates funded provisions for long-tail liabilities, and clearly assigns where liability resides. Together, these provide a familiar, investable set of legal preconditions for financial close.[25]
Understanding Nuclear Liability and Insurance Risk
Third-Party Liability
Channelling principle: all third-party claims flow to the licensed operator only. Lenders and equity investors bear no direct nuclear liability.
Liability frameworks (Paris, Vienna, CSC, US Price-Anderson) establish minimum financial security requirements and a mandatory state backstop above the minimum.
Insurance
National insurance pools (NRI, NEIL, EMANI, ASSURATOM) aggregate capacity for nuclear risks. A mature market with 60+ years of operating history.
Pool capacity is finite. Early engagement (at technology selection, not at FID) is required to confirm cover.
Long-Tail Liabilities
Decommissioning: mandatory financial assurance required in all major jurisdictions. The best assurances ring-fence liability from investor balance sheets.
Used fuel: interim dry cask storage is proven and low-cost. Government bears ultimate permanent storage liability in all major jurisdictions.
Known Gaps in the Framework
Geographic coverage is incomplete
Some emerging countries do not have ratified conventions or national liability law. IGAs substitute bilaterally but do not bind third-country claimants.
Convention minimum financial security requirements may be inadequate
Residual liability above the minimum financial security requirements falls on government. Structurally equivalent to government indemnity in aviation and offshore petroleum. It can impact sovereign credit risk.
Decommissioning funds coverage is uneven
Not all markets have mandatory funding regimes, leaving liability unprovisioned on the operator’s balance sheet where none exists. Where they exist, they are generally considered adequate, and long-term operation extensions can strengthen this further, as funds continue accruing for decades beyond the plant's original design life.
