Global Nuclear Power MRO Service Market Strategic Research Report

Scope of the Report

The global Nuclear Power MRO Service market size is predicted to grow from US$ 1,816 million in 2025 to US$ 2,670 million in 2032; it is expected to grow at a CAGR of 5.6% from 2026 to 2032.

Nuclear Power MRO (Maintenance, Repair, and Overhaul) services refer to the specialized activities—such as routine maintenance, breakdown repairs, periodic inspections, major equipment overhauls, and technical upgrades—carried out on the nuclear island, conventional island, and auxiliary systems after a nuclear power plant enters the operational phase. These activities are essential for ensuring nuclear safety, equipment reliability, unit availability, and the preservation of design life. Compared to general industrial MRO, nuclear power MRO is characterized by high safety classifications, strict regulatory oversight, lengthy technical certification processes, rigorous quality traceability requirements, and limited outage windows; all operations must typically comply with nuclear safety regulations, quality assurance systems, and radiation protection standards.

In terms of scope, nuclear power MRO encompasses preventive maintenance, predictive maintenance, corrective maintenance, in-service inspection, non-destructive testing (NDT), condition monitoring, calibration and testing, spare parts replacement, and equipment refurbishment. "Major overhauls" are typically executed during scheduled shutdowns and refueling cycles, involving tasks such as reactor servicing, steam generator inspection, main coolant pump maintenance, turbine-generator unit servicing, valve and piping inspection, electrical system testing, and instrumentation and control (I&C) system calibration. Some projects also include digital I&C upgrades, replacement of aging equipment, power uprates, and life-extension modifications. Regarding the assets serviced, nuclear power MRO covers nuclear island equipment, conventional island equipment, and plant auxiliary facilities. The nuclear island primarily includes the reactor pressure vessel, control rod drive mechanisms, main coolant pumps, steam generators, and safety-class valves; the conventional island includes turbines, generators, condensers, and feedwater systems; and auxiliary systems include electrical and I&C, HVAC, fire protection, water treatment, lifting equipment, radiation monitoring, and plant structures. Different equipment items carry varying nuclear safety classifications, resulting in significant differences in requirements regarding personnel qualifications, process validation, and supply chain traceability for service providers.

The expansion of global installed nuclear capacity, combined with the imperatives of energy security and the low-carbon transition, serves as the fundamental driver for the sustained growth of the nuclear power MRO (maintenance, repair, and operations) market. The aging of the global nuclear fleet and the extension of operating licenses constitute another core factor propelling industry growth. As of June 2025, the average age of operating nuclear units worldwide is approximately 32 years; over 67% of these units have been in operation for more than 30 years, and about 38% for over 40 years. To extend unit lifespans from the original design life of 40 years to 60 or even 80 years, operators must intensify efforts in equipment aging management, periodic safety reviews, non-destructive testing, material performance assessment, and the replacement of major components. This drives demand for maintenance and life-extension upgrades across areas such as steam generators, primary pumps, turbines, valves, cabling, and instrumentation and control (I&C) systems.

Technologically, nuclear MRO is shifting from periodic and corrective maintenance toward condition-based, predictive, and risk-informed maintenance. Technologies such as online sensors, equipment health management platforms, artificial intelligence, digital twins, robotic inspections, and remote testing are increasingly being deployed for anomaly detection, residual life prediction, and maintenance schedule optimization, thereby reducing outage times and personnel radiation exposure. However, the upgrade of digital I&C systems involves addressing challenges related to nuclear-grade equipment qualification, cybersecurity, data reliability, and regulatory approvals; consequently, new technologies are typically introduced into nuclear power plants through a gradual, incremental approach.

Looking ahead, nuclear MRO services will increasingly be characterized by full-lifecycle management, specialization, and localization. Operators will favor long-term service agreements that bundle the procurement of spare parts, condition monitoring, scheduled overhauls, technical upgrades, and lifespan management, while collaboration among original equipment manufacturers (OEMs), nuclear engineering groups, and regional specialized service providers will deepen. Simultaneously, supply chain security requirements will drive the localization or regionalization of nuclear-grade spare parts supplies. With the gradual commercial deployment of small modular reactors (SMRs) and advanced reactor designs, the industry will see emerging demand for modular maintenance, remote O&M, and higher levels of automation; nevertheless, aging management and life-extension upgrades for traditional large-scale reactors will remain the primary source of market growth in the medium term.

This report presents a comprehensive overview of the global Nuclear Power MRO Service market, covering market size and forecast, segmentation by product type and application, competitive landscape, leading players and regional and country-level outlook.

Segment by Type

• Maintenance
• Repair
• Operations

Segment by Equipment System

• Nuclear Island System MRO
• Conventional Island System MRO
• Nuclear Auxiliary System MRO
• Electrical and I&C MRO

Segment by Contract Models

• One-off Project Maintenance Service
• Annual Maintenance Contract
• Long-term Service Agreement
• Vessel Full-lifecycle Management Service

Segment by Service Coverage

• Equipment and Component-Level MRO
• System and Island-Level MRO
• Integrated MRO for Single Units

Segment by players, this report covers

• Integrated Power Services
• Orano
• ARCYS
• Valcor Engineering Corporation
• Patria Group
• The Merrick Group
• AFRY
• R.E. Mason
• ATOX
• GE Vernova
• Onet Technologies
• Framatome
• Amentum
• Equans
• WSI
• Mirion
• General Atomics Electromagnetic Systems
• Power Services Group
• MISTRAS Group
• Laurentis Energy Partners
• Enercon
• Westinghouse Nuclear
• NuScale Power
• MLEA
• Intertek
• Mammoet
• MPR Associates
• EnergySolutions
• SOCOTEC
• Sargent & Lundy

Segment by Application

• Pressurized Water Reactor
• Boiling Water Reactor
• Others

Who Can Use This Report?

This report is written for decision-makers who need a clear, data-backed view of the global Nuclear Power MRO Service market:

• Manufacturers, suppliers and solution providers benchmarking their position and planning product, capacity and go-to-market strategy
• Distributors, channel partners and end users in Pressurized Water Reactor, Boiling Water Reactor, Others evaluating demand and sourcing options
• Investors, financial analysts and consultants assessing growth opportunities, competitive dynamics and M&A potential
• Government agencies, industry associations and research institutions tracking industry developments and policy impact