Deploying nuclear power: Financing, risk, and execution in the current market environment

The renewed global interest in nuclear power is often framed as a policy story driven by decarbonization goals, energy security concerns, and surging electricity demand from digital infrastructure and electrification. While these forces are real and durable, they materially understate the challenge at hand. The practical constraint on nuclear deployment today is not strategic will, but execution. Specifically, the challenge lies in how nuclear projects are financed, how risk is allocated, and how investors assess credibility in a sector defined by long timelines and asymmetric downside risk.

Common misunderstandings about financing

A recurring misconception within the nuclear community is that financing challenges are primarily a function of insufficient interest or misunderstanding among capital providers. In reality, the issue is not demand for nuclear exposure but the structure by which that exposure is offered. Nuclear financing remains fundamentally different from most other forms of generation investment because of the scale of capital required, the duration of construction, and the inability to diversify or hedge early-stage risks.

New nuclear construction has historically required balance sheet support, most often from sovereign or regulated utilities, because nonrecourse financing presupposes completion certainty. That certainty is precisely what nuclear projects have struggled to deliver. As a result, nearly all new builds in Europe today rely on explicit government or sovereign guarantees, often complemented by export credit agency support. Even in those cases, the procurement process can stretch over several years and typically involves government ministries, technical and financial advisors, regulators, auditors, and a highly interdependent supply chain.

Public-private partnership structures are not an innovation in the nuclear industry-they are the base case. What varies is how effectively risk is shared among sponsors, governments, utilities, vendors, and offtakers. Financing outcomes hinge less on headline cost estimates than on whether the financial structure credibly distributes construction, schedule, and regulatory risk to parties capable of absorbing it.

Assessing today's nuclear opportunities

From an investor perspective, there is consensus that nuclear power is essential to meet future clean, firm power demand. Growth in AI workloads, data centers, electrification, and industrial load has made the availability and reliability of power a strategic concern rather than a marginal cost issue. Nuclear energy is increasingly viewed as part of a broader solution set alongside renewables, storage, and gas.

Where investors struggle is differentiation. A growing set of nuclear technologies, including large reactors, small modular reactors, and advanced designs, often promise similar value propositions and comparable deployment timelines. Many vendors remain precommercial, with limited operating history and unresolved fuel, supply-chain, or regulatory dependencies. In the absence of execution data, capital has tended to consolidate around narrative momentum rather than fundamentals, as Admiral Rickover famously noted over 70 years ago.

This dynamic has important consequences for the composition of the investor base. Certain larger or more institutional asset managers remain reluctant to commit capital until projects and companies demonstrate progress against concrete performance benchmarks. Key performance indicators such as licensing milestones, construction starts, cost and schedule adherence, and early operating performance increasingly function as gating events for broader capital participation.

As a result, the current investor landscape is somewhat bifurcated. On one end are higher-risk, growth-oriented investors willing to underwrite technology development and early deployment risk in pursuit of long-term optionality. On the other are pools of patient, long-duration capital that typically define infrastructure ownership once assets are operational and cash flows are demonstrably stable. While the former has driven much of the early momentum in nuclear and SMR development, it is the latter that will ultimately determine whether nuclear power scales into an established asset class and unlocks access to materially larger pools of capital.

A natural consequence of this environment is a bias toward incumbents and proven delivery platforms. Vendors with experience constructing, operating, and servicing existing nuclear fleets command a material credibility premium. Over time, as projects move from paper to construction and ultimately into operation, capital is likely to become more selective, with a clear high-grading effect across technologies, sponsors, and financing structures.

Risks-and risk management

Nuclear project risk is best understood by phase: development, construction, and operations. Development risk is primarily financial in nature and centers on capitalization, ownership structure, and risk-sharing arrangements. Utilities, which are often best positioned to assemble development consortiums, face increasing scrutiny over their cost of capital and balance sheet capacity. This has opened the door to alternative models, including independent developers, vendor-led build-own-transfer structures, and government-backed project entities.

Construction risk remains the most acute challenge. Cost overruns and schedule slippage have derailed projects across regions and political regimes. The existence of abandoned or partially constructed plants underscores the fragility of nuclear economics when assumptions break down. As a result, true project-finance or nonrecourse structures are viable only when completion risk is effectively eliminated through guarantees, contingencies, or balance sheet backstops.

Importantly, cost certainty is often more valuable than cost competitiveness. Given the strategic importance of nuclear deployment, stakeholders are often willing to accept higher absolute costs in exchange for predictable outcomes. Mechanisms like power price escalation, rate base pass-through, contracts for difference, risk insurance, tax credit monetization, and contingency reserves are all used to rebalance risk and improve financeability.

Operational risk, while often underappreciated, is also material, particularly for newer designs. The exceptional capacity factors achieved by today's large light water fleet were earned over decades of optimization. New technologies will require learning curves in areas such as materials performance, refueling cycles, outage management, and long-term degradation mechanisms. Investors recognize this reality and price early deployments accordingly.

Policy, licensing, and deployment

Recent executive orders and policy initiatives have materially improved the backdrop for nuclear development, particularly in the United States. Streamlined licensing, cross-government coordination, and targeted demonstration programs have shortened the conceptual distance between policy intent and physical deployment. While nuclear development remains slow by any absolute measure, alignment across regulators, government agencies, and financiers is stronger than at any point in recent decades.

From a finance perspective, the most meaningful impact of these policy shifts is not speed but certainty. Clearer authorization pathways reduce development risk and enable capital planning over longer horizons. Department of Energy involvement is likely to remain central to U.S. deployments, particularly for first-of-a-kind projects. Export agencies and supranational institutions continue to play an outsized role internationally.

Nuclear power is reemerging as a strategic asset class, but its deployment will be determined by discipline rather than optimism. Financing structures must reflect the realities of construction risk, regulatory complexity, and long asset lives. Investors are aligned on nuclear power's necessity but remain selective in their deployment of capital. Those projects that credibly balance risk, demonstrate execution capability, and align financial structures with practical realities will define the next generation of nuclear development.

Ryan Nielson is head of nuclear technology at Citi.