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The Global Nuclear Power Plant Operation and Maintenance Market reached a value of USD 68.80 Billion at 2025 and is projected to expand at a CAGR of around 4.70% during the forecast period of 2026-2035. With an ageing global reactor fleet driving demand for life extension and refurbishment programmes, rising adoption of AI-powered predictive maintenance and digital twin technologies, growing nuclear energy investments across Asia Pacific and the Middle East anchored by energy security priorities, and increasingly rigorous international regulatory compliance requirements pushing O&M service quality standards higher, the market is expected to reach USD 108.91 Billion by 2035.

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| Global Nuclear Power Plant Operation and Maintenance Market Report Summary | Description | Value |
| Base Year | USD Billion | 2025 |
| Historical Period | USD Billion | 2019-2025 |
| Forecast Period | USD Billion | 2026-2035 |
| Market Size 2025 | USD Billion | 68.80 |
| Market Size 2035 | USD Billion | 108.91 |
| CAGR 2019-2025 | Percentage | XX% |
| CAGR 2026-2035 | Percentage | 4.70% |
| CAGR 2026-2035 - Market by Region | Middle East and Africa | 9.6% |
| CAGR 2026-2035 - Market by Region | Asia Pacific | 5.9% |
| CAGR 2026-2035 - Market by Type | Configuration Management | 5.4% |
| CAGR 2026-2035 - Market by End Use | Pressurised Water Reactor (PWR) | 5.3% |
| Market Share by Country | China | 21.0% |
Short description: The Global Nuclear Power Plant Operation and Maintenance Market is being shaped by the convergence of several powerful forces: an accelerating nuclear renaissance backed by record government investment, growing reliance on long-term operational partnerships to ensure fleet continuity, strategic cross-border alliances pooling maintenance capabilities, and advanced lifecycle maintenance planning gaining traction as a competitive differentiator. These dynamics are expected to sustain market momentum well through the 2035 forecast horizon.
In October 2025, Westinghouse Electric Company, Brookfield Asset Management, and Cameco Corporation entered a landmark strategic partnership with the United States Government to deploy at least USD 80 billion of new AP1000 reactors across the country. Structured as a public-private arrangement with embedded profit-sharing mechanisms, the programme is expected to create over 100,000 construction jobs and revitalize the US nuclear industrial supply chain. For the nuclear O&M market, this development represents a generational demand catalyst, as each reactor fleet will require decades of dedicated configuration management, equipment reliability, and work management services following commissioning.
In August 2025, South Korea's state-owned Korea Hydro and Nuclear Power formally reached an agreement with Westinghouse Electric Company to explore a joint venture targeting the US nuclear market. The primary rationale for both parties was KHNP's proven engineering, maintenance, and repair capabilities, which complement Westinghouse's AP1000 reactor intellectual property. The collaboration aims to strengthen both organizations' positioning for US government nuclear contracts while creating a platform for joint market entries across Europe and other international markets seeking qualified O&M partners.
In March 2025, Orano and Energoatom, Ukraine's national nuclear operator, announced a major long-term commercial agreement for the supply of uranium enrichment services to Ukraine's nuclear power plant fleet through 2040. Signed during an official ceremony attended by senior executives from both organizations, the agreement guarantees Energoatom a reliable and diversified enrichment supply, directly supporting the continued operational capacity of Ukraine's nuclear generation fleet. This partnership reinforces the importance of integrated, multi-decade operational support in sustaining nuclear fleet performance across high-demand energy markets.
At the end of November 2024, Orano signed two MOX fuel assembly production contracts with Mitsubishi Heavy Industries Ltd to supply Japanese utilities Kyushu Electric Power and Shikoku Electric Power. These agreements followed earlier back-end reprocessing contracts with Japanese utilities and mark a significant step in Orano's deepening engagement with Asia Pacific's nuclear operational ecosystem. The contracts support the continued safe operation of Japanese reactors using MOX fuel, highlighting the critical link between fuel cycle services and long-term nuclear plant O&M readiness.
In November 2023, Orano Projets, the engineering subsidiary of Orano Group, was awarded a contract by the ITER Organization covering dependability analysis and integrated logistics support for all systems, structures, and components of the world's largest experimental fusion reactor under construction in southern France. Orano is responsible for validating engineering studies that demonstrate the installation's optimal operational availability across its full lifecycle. This appointment underscores the growing industry premium placed on lifecycle-centric maintenance planning and advanced dependability analysis as tools for managing complex nuclear facilities safely.
The global commitment to expanding nuclear fleets as a low-carbon, baseload energy solution is generating a sustained and growing pipeline of Global Nuclear Power Plant Operation and Maintenance Market growth. Governments are backing this revival with unprecedented capital, regulatory support, and public-private partnerships. In October 2025, Westinghouse Electric Company, Brookfield Asset Management, and Cameco formalized a binding partnership with the US Government to deploy at least USD 80 billion of AP1000 reactors across the United States, creating decades of forward O&M demand and firmly establishing nuclear power as a pillar of America's clean energy and artificial intelligence infrastructure strategy.
Operators of nuclear power plants are increasingly moving away from transactional procurement toward long-horizon contractual relationships that cover both fuel supply and maintenance services. These arrangements provide operational predictability, reinforce energy security, and reduce the risks of supply chain disruption for critical nuclear materials and services. In March 2025, Orano and Energoatom formalized a landmark enrichment services agreement running through 2040, guaranteeing a diversified and reliable supply for Ukraine's nuclear fleet. This deal demonstrates the growing market preference for integrated, relationship-driven operational partnerships that span the nuclear fuel and maintenance value chain.
The complexity of modern nuclear O&M requirements is driving a wave of cross-border alliances, as no single company can cost-effectively cover the full range of nuclear-grade maintenance capabilities. Service providers are pooling engineering expertise, reactor-type knowledge, and regional market access to compete for large-scale government O&M contracts. In August 2025, South Korea's Korea Hydro and Nuclear Power reached a joint venture agreement with Westinghouse Electric Company, citing KHNP's engineering, maintenance, and repair capabilities as the central strategic rationale, setting a precedent for capability-driven consolidation across the global nuclear maintenance sector.
The nuclear O&M sector is undergoing a fundamental shift in maintenance philosophy, from reactive and scheduled approaches toward lifecycle-integrated dependability analysis that embeds reliability planning from design through decommissioning. This shift reduces unplanned outages, lowers total lifetime costs, and strengthens compliance with stringent international nuclear safety standards. In November 2023, Orano Projets secured a contract from the ITER Organization to provide dependability analysis and integrated logistics support for all systems of the world's largest experimental fusion reactor in France, demonstrating how advanced maintenance engineering is being embedded as a core competency in nuclear facility management worldwide.
The Expert Market Research's report titled “Global Nuclear Power Plant Operation and Maintenance Market Report and Forecast 2026-2035” offers a detailed analysis of the market based on the following segments:
Market Breakup by Services
Key Insight: Equipment Reliability has emerged as the most critically demanded service category, given that over 60% of global operational reactors are more than 30 years old and require intensive condition monitoring, component replacement programs, and reliability engineering to sustain safe operations beyond original design lifetimes. Configuration Management is equally prominent in revenue terms, driven by strict regulatory requirements for complete and accurate documentation of all plant modifications, safety procedure updates, and system state changes across every operational phase. Work Management services, covering the planning, scheduling, and execution of both routine and outage-related maintenance activities, are gaining momentum as operators adopt digital scheduling platforms to optimize labour allocation and reduce outage durations. Together, these three service categories define the operational backbone of global nuclear plant maintenance, each reinforcing the safety, efficiency, and regulatory standing of the facilities they support.
Market Breakup by Reactor Type
Key Insight: Pressurised Water Reactors account for the largest proportion of global operational nuclear capacity, representing close to 70% of all active reactors, and as a result, they constitute the dominant revenue segment across O&M service categories. Significant PWR fleets across the United States, France, China, and South Korea generate substantial and consistent maintenance demand. Boiling Water Reactors, while representing the second-largest segment globally, face elevated O&M complexity following post-Fukushima regulatory enhancements, particularly in Japan, where reactor restart approvals have introduced additional safety upgrade requirements. Advanced Gas-Cooled Reactors are geographically concentrated in the United Kingdom, where ongoing life extension assessments by EDF Energy generate specialized high-value maintenance contracting opportunities. The Others category, which includes nascent Small Modular Reactor designs, is expected to grow in relevance as early SMR deployments begin generating initial O&M service requirements during the latter part of the forecast period.
Market Breakup by Region
Key Insight: North America and Europe collectively account for the largest share of global nuclear O&M expenditure, driven by their extensive installed reactor fleets and decades-old regulatory compliance frameworks that mandate comprehensive, ongoing maintenance programs. Asia Pacific is the fastest-growing regional market, with China constructing reactors at a pace unmatched globally and India articulating an ambitious target of 100 GW of nuclear capacity by 2047. The Middle East and Africa region, led by the UAE's operational Barakah plant, is forecast to grow at the highest regional CAGR of 9.6% during the forecast period, reflecting a structural shift from fossil fuel dependence toward diversified low-carbon energy portfolios. Latin America's market, anchored by Brazil's Angra plants and Argentina's domestic nuclear programme, maintains stable O&M demand within a more modest growth trajectory.
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By Services
Within the services segmentation, Equipment Reliability commands the largest and most consistently growing share of O&M expenditure globally. With more than 60% of operational reactors worldwide exceeding 30 years of service, plant operators are directing substantial budgets toward condition monitoring systems, non-destructive testing, component replacement, and reliability engineering to sustain safe and efficient output. North American and European operators, whose fleets are among the oldest in the world, are the primary contributors to this segment's dominance. Configuration Management follows as the second-largest revenue contributor, underpinned by non-negotiable regulatory requirements that obligate operators to maintain current and complete documentation of all safety system states, procedure revisions, and equipment modifications across every plant lifecycle phase.

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By Reactor Type
Within the reactor type segmentation, Pressurised Water Reactors dominate market revenue, consistent with their share of approximately 70% of the global installed fleet. PWR O&M encompasses a wide range of high-value activities including steam generator inspections and replacements, reactor coolant pump overhauls, primary circuit integrity testing, and comprehensive safety system surveillance programs. Boiling Water Reactors follow as the second-largest segment, with additional O&M complexity arising from post-Fukushima safety enhancements that have lengthened outage schedules and elevated refurbishment costs in markets such as Japan and Sweden. Advanced Gas-Cooled Reactor maintenance, though geographically concentrated in the United Kingdom, commands premium service rates due to the bespoke expertise required for graphite core management and gas-cooled system maintenance that distinguishes AGRs from their water-cooled counterparts.

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North America holds the largest single-region share of the global nuclear O&M market, anchored by the United States, which operates approximately 93 reactors representing the world's highest installed nuclear capacity. The US fleet is among the oldest globally, with the majority of units operating under extended 20-year licence renewals granted by the Nuclear Regulatory Commission, generating substantial, sustained demand for life extension services, safety system upgrades, and digital maintenance solutions. Canada's CANDU reactor fleet, operated by Ontario Power Generation and Bruce Power, adds further regional depth. The US Government's October 2025 landmark USD 80 billion AP1000 reactor deployment partnership with Westinghouse, Brookfield, and Cameco reinforces North America's position as the world's most consequential nuclear O&M market for at least the next two decades, creating a generational demand pipeline for all three service categories tracked in this report.

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Europe represents the second-largest regional market, driven primarily by France, whose 56-reactor EDF fleet generates approximately 70% of the country's electricity and requires one of the world's most intensive and continuous O&M investment programmes. The United Kingdom's fleet of Advanced Gas-Cooled Reactors, managed by EDF Energy UK, is undergoing targeted life extension reviews that are creating incremental, high-value O&M contracting opportunities for specialist providers. Russia's domestic and international nuclear expansion under Rosatom adds further volume to European O&M market totals. Germany, despite its 2023 exit from nuclear power generation, continues to generate meaningful decommissioning-related O&M service demand. Key players including Orano, Fortum, TUV Rheinland, and Veolia Group have established strong regional positions by offering integrated service portfolios spanning the full nuclear plant lifecycle, from operational maintenance to end-of-life decommissioning support.
The Global Nuclear Power Plant Operation and Maintenance Market is moderately consolidated, with competition structured across three broad participant categories: state-backed nuclear enterprises with full fuel cycle capabilities, large multi-sector engineering and technical services firms with nuclear-grade credentials, and specialized O&M pure-plays serving specific reactor types or regional markets. Competitive differentiation rests on four key pillars: reactor-type-specific technical expertise, regulatory certification and safety track record, long-term operator relationships, and the ability to offer integrated services spanning multiple O&M categories under a single contractual umbrella.
Most major O&M contracts are awarded through competitive tender processes governed by national nuclear safety regulators, creating high barriers to entry for new market participants without established nuclear credentials. The competitive landscape is further shaped by intellectual property dynamics, as reactor technology owners such as Westinghouse maintain natural advantages in securing maintenance contracts for plants running their own designs. Strategic alliances and joint ventures are growing in prevalence as firms seek to combine specialist capabilities and access new geographic markets, particularly in the growing Asia Pacific and Middle East regions.
Founded in 2017 and headquartered in Chatillon, France, Orano Group is a leading international nuclear materials operator covering the full fuel cycle from mining and enrichment to reprocessing and services. In nuclear plant O&M, Orano delivers industrial maintenance, radiation protection, waste management, and site logistics services for EDF's French reactor fleet as well as for international clients. With approximately 18,000 employees globally, Orano also provides engineering consulting through Orano Projets and holds contracts with major clients including the ITER Organization.
Established in 1998 and headquartered in Espoo, Finland, Fortum is a Nordic energy company with direct nuclear plant operations expertise. The company operates the Loviisa nuclear power plant in Finland and provides O&M technical support services across Northern Europe. Fortum's nuclear capabilities span plant operations management, outage planning, safety engineering, and regulatory compliance, supported by decades of operating experience with VVER-type pressurised water reactors and strong credentials with Finnish and European nuclear regulatory authorities.
Founded in 1872 and based in Cologne, Germany, TUV Rheinland is a globally recognized testing, inspection, and certification organization with deep expertise in nuclear safety assessments and technical compliance services. In the nuclear O&M sector, TUV Rheinland provides independent safety assessments, regulatory compliance auditing, equipment qualification testing, and probabilistic risk analysis for nuclear plant operators across Europe, Asia Pacific, and North America, making it a trusted independent authority in high-stakes plant maintenance and safety decision processes.
Established in 2007 and headquartered in Moscow, Russia, Rosatom Group is a state-owned nuclear enterprise overseeing the complete nuclear power cycle, including construction, operation, and decommissioning of facilities worldwide. As one of the largest nuclear service providers globally by installed capacity under management, Rosatom offers comprehensive O&M solutions for VVER reactors in Russia and across its international project portfolio, with active engagements across Asia, the Middle East, Eastern Europe, and Africa generating growing O&M service volumes over the forecast period.
Other key players in the market are Holtech International, Veolia Group, Westinghouse Electric Company LLC, Dietsmann, The Merric Group Inc., and Others.
*Please note that this is only a partial list; the complete list of key players is available in the full report. Additionally, the list of key players can be customized to better suit your needs.*
Thinking about your next move in the nuclear energy sector? Our 2026-2035 report on the Global Nuclear Power Plant Operation and Maintenance Market gives you the full picture: detailed market sizing, segment-level forecasts, regional breakdowns, and profiles of the companies defining service standards in this high-stakes industry. Whether you are an operator, a service provider, an investor, or a policy professional, the intelligence in this report will sharpen your strategy. Download your free sample today and uncover the opportunities shaping the future of the nuclear plant operations and maintenance industry.
*While we strive to always give you current and accurate information, the numbers depicted on the website are indicative and may differ from the actual numbers in the main report. At Expert Market Research, we aim to bring you the latest insights and trends in the market. Using our analyses and forecasts, stakeholders can understand the market dynamics, navigate challenges, and capitalize on opportunities to make data-driven strategic decisions.*
The market is assessed to grow at a CAGR of 4.70% between 2026 and 2035.
The market is being driven by the ageing nuclear fleet and strict regulatory compliance related to nuclear maintenance.
The key trends aiding the market expansion include the expansion of nuclear power across the world and the adoption of advanced technologies.
The major reactor types are pressurised water reactor (PWR), boiling water reactor (BWR), and advanced gas-cooled reactor (AGR), among others.
The major services in the market are configuration management, equipment reliability, and work management.
Major regions considered in the market are North America, Europe, the Asia Pacific, Latin America, and the Middle East and Africa.
Key players in the market are Orano Group, Fortum Corporation, TÜV Rheinland, Rosatom Group, Holtec International, Veolia Group, Westinghouse Electric Company LLC., Dietsmann, and The Merric Group, Inc., among others.
In 2025, the market attained a value of nearly USD 68.80 Billion.
The market is estimated to witness a healthy growth in the forecast period of 2026-2035 to reach about USD 108.91 Billion by 2035.
Explore our key highlights of the report and gain a concise overview of key findings, trends, and actionable insights that will empower your strategic decisions.
| REPORT FEATURES | DETAILS |
| Base Year | 2025 |
| Historical Period | 2019-2025 |
| Forecast Period | 2026-2035 |
| Scope of the Report |
Historical and Forecast Trends, Industry Drivers and Constraints, Historical and Forecast Market Analysis by Segment:
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| Breakup by Services |
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| Breakup by Reactor Type |
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| Breakup by Region |
|
| Market Dynamics |
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| Competitive Landscape |
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| Companies Covered |
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