Global Nuclear Steam Generator Market Growth, Share, Size, Trends and Forecast (2025 - 2031)

By design, the market is segmented into horizontal and vertical steam generators. Horizontal steam generators are widely used in Pressurized Heavy Water Reactors (PHWRs), offering enhanced efficiency, ease of maintenance, and improved thermal performance. On the other hand, vertical steam generators dominate in Pressurized Water Reactors (PWRs), which are the most commonly deployed nuclear reactors worldwide. Vertical steam generators offer compact designs and higher operational efficiency, making them the preferred choice for new nuclear power plants.

Based on reactor type, the market is categorized into Pressurized Water Reactors (PWRs), Pressurized Heavy Water Reactors (PHWRs), Boiling Water Reactors (BWRs), and Advanced Pressurized Water Reactors (APWRs). PWRs account for the largest market share due to their widespread deployment in nuclear power plants across the U.S., China, and Europe. PHWRs are mainly used in Canada and India, leveraging natural uranium as fuel and heavy water as a moderator. BWRs, while less common than PWRs, still hold a significant share, with key installations in Japan and the U.S. APWRs, an advanced version of PWRs, incorporate enhanced safety and efficiency features, making them a promising choice for future nuclear installations.

In terms of material, the nuclear steam generator market is segmented into Alloy 800H, Alloy 690TT, Stainless Steel 316L, Titanium Alloys, and other specialized alloys. Alloy 690TT is the most widely used material due to its excellent resistance to stress corrosion cracking, a critical factor in ensuring the long-term performance of steam generators. Alloy 800H, known for its high-temperature strength, is used in specific reactor designs requiring enhanced durability. Stainless Steel 316L offers superior corrosion resistance and is used in select applications, while titanium alloys are emerging as a potential material choice due to their exceptional strength-to-weight ratio and corrosion resistance properties. The continuous evolution of materials in nuclear steam generator manufacturing aims to enhance longevity, safety, and operational efficiency.

By capacity, the market is segmented into below 500 MW, 500-750 MW, 750-1000 MW, and above 1000 MW. The 750-1000 MW segment holds a significant share, as most modern nuclear reactors fall within this range. The demand for high-capacity steam generators above 1000 MW is expected to rise as countries invest in large-scale nuclear power projects to meet growing energy demands. Smaller capacity steam generators, particularly those below 500 MW, are gaining traction due to the increasing focus on small modular reactors (SMRs), which offer flexibility, cost-effectiveness, and enhanced safety features.

Global Nuclear Steam Generator Segment Analysis

In this report, the Global Nuclear Steam Generator Market has been segmented by Design, Reactor Type,Material, Capacity, and Geography.

Global Nuclear Steam Generator Market, Segmentation by Design

The Global Nuclear Steam Generator Market has been segmented by Design into Horizontal and Vertical.

Horizontal and Vertical. Horizontal steam generators are commonly associated with pressurized water reactors (PWRs), where they facilitate the transfer of heat from the reactor coolant to produce steam for electricity generation. On the other hand, Vertical steam generators are typically utilized in boiling water reactors (BWRs), serving a similar function of converting water into steam to power turbines and generate electricity.

Each design holds unique characteristics tailored to specific reactor configurations and operational requirements, playing integral roles in nuclear power generation worldwide. This segmentation provides valuable insights into the diverse applications and operational nuances of steam generators across different reactor technologies, aiding stakeholders in making informed decisions and strategic investments in the Global Nuclear Steam Generator Market.

Global Nuclear Steam Generator Market, Segmentation by Reactor Type

The Global Nuclear Steam Generator Market has been segmented by Reactor Type into Pressurized Water Reactor, Pressurized Heavy Water Reactor, Boiling Water Reactor and Advanced Pressurized Water Reactor

Pressurized Water Reactors (PWRs) are among the most widely used nuclear reactor types globally, utilizing pressurized water as both coolant and moderator. Pressurized Heavy Water Reactors (PHWRs), on the other hand, use heavy water as a moderator and coolant, offering certain operational advantages and fuel flexibility. Boiling Water Reactors (BWRs) employ a different approach, allowing coolant water to boil within the reactor vessel to generate steam directly for turbine operation. Advanced Pressurized Water Reactors (APWRs) incorporate innovative design features and technologies to enhance safety, efficiency, and performance compared to traditional PWRs.

Segmentation by Reactor Type enables stakeholders to gain insights into the specific market dynamics and trends associated with each reactor technology, facilitating informed decision-making and strategic planning. By understanding the unique requirements and opportunities within each segment, stakeholders can effectively navigate the complexities of the Global Nuclear Steam Generator Market and capitalize on emerging growth prospects.

Global Nuclear Steam Generator Market, Segmentation by Material

The Global Nuclear Steam Generator Market has been segmented by Material Type into Alloy 800H, Alloy 690TT, Stainless Steel 316L, Titanium Alloys, and Alloys.

Alloy 800H is one of the primary materials used in nuclear steam generators due to its excellent high-temperature strength and resistance to oxidation and carburization. This iron-nickel-chromium alloy exhibits remarkable creep resistance and is widely used in environments where long-term structural stability is critical. Alloy 800H has been extensively utilized in nuclear applications, especially in heat exchangers and steam generators, due to its ability to withstand prolonged exposure to elevated temperatures while maintaining mechanical integrity. Its resistance to stress corrosion cracking further enhances its suitability for nuclear applications.

Another widely used material is Alloy 690TT, a nickel-based alloy known for its exceptional resistance to stress corrosion cracking, particularly in high-temperature, high-pressure water environments typical of pressurized water reactors (PWRs). The introduction of Alloy 690TT has significantly improved the longevity and reliability of nuclear steam generators, replacing older materials such as Alloy 600, which exhibited susceptibility to stress corrosion cracking over time. Alloy 690TT also demonstrates excellent resistance to general corrosion and pitting, making it a preferred choice for nuclear industry applications.

Stainless Steel 316L is another important material used in nuclear steam generators due to its excellent corrosion resistance, particularly in aqueous environments containing chlorides. This low-carbon variation of stainless steel 316 minimizes the risk of carbide precipitation during welding, which enhances its performance in high-temperature and high-pressure conditions. The material is widely used in structural components of nuclear reactors, including steam generator tubing, because of its mechanical strength and ability to withstand harsh operating conditions without significant degradation.

Titanium Alloys have also found their place in the nuclear steam generator market due to their superior corrosion resistance, particularly in seawater-cooled nuclear power plants. These alloys are lightweight and exhibit excellent resistance to stress corrosion cracking, making them an attractive choice for certain nuclear applications where exposure to aggressive environments is a concern. Their high strength-to-weight ratio allows for efficient performance in steam generator tubing, reducing the overall weight of components while maintaining structural integrity.

Global Nuclear Steam Generator Market, Segmentation by Capacity

The Global Nuclear Steam Generator Market has been segmented by Capacity Type into Below 500 MW, 500-750 MW, 750-1000 MW, and Above 1000 MW.

The Below 500 MW segment primarily includes smaller nuclear reactors, often used for research purposes, small modular reactors (SMRs), or older-generation plants with limited capacity. These generators are particularly beneficial in regions where grid connectivity and energy demand are moderate, offering a cost-effective solution for localized power generation. Additionally, the increasing focus on SMRs for providing reliable and scalable energy in remote locations further strengthens the demand for nuclear steam generators within this segment. Many emerging economies are considering low-capacity nuclear plants to complement their energy mix, enhancing the growth prospects of this segment.

The 500-750 MW segment serves as a crucial bridge between small and large-scale nuclear power plants, primarily catering to mid-sized nuclear power stations. This capacity range is widely adopted in regions with a growing focus on nuclear energy expansion, particularly in countries transitioning from fossil fuels to cleaner energy sources. Governments and energy regulators in nations such as China, India, and South Korea are actively investing in medium-capacity reactors to meet the increasing electricity demands while ensuring sustainability and lower carbon emissions. Moreover, advancements in nuclear reactor technologies, such as pressurized water reactors (PWRs) and boiling water reactors (BWRs), contribute to the efficiency of generators in this segment, making them a preferred choice for various nuclear projects worldwide.

The 750-1000 MW segment comprises large-scale nuclear reactors that play a vital role in the energy infrastructure of developed nations. This segment is primarily driven by the increasing need for stable baseload power generation, particularly in countries with well-established nuclear energy programs such as the United States, France, and Russia. Nuclear steam generators within this capacity range support high-efficiency reactors, enabling large-scale electricity production with minimal environmental impact. Furthermore, with the growing emphasis on reducing greenhouse gas emissions and promoting nuclear as a clean energy alternative, utilities and governments are investing in upgrading existing nuclear plants and constructing new facilities with generators falling within this capacity range. Enhanced safety measures, improved thermal efficiency, and extended operational lifespans of modern nuclear steam generators further contribute to their growing adoption in the 750-1000 MW category.

The Above 1000 MW segment represents the most advanced and high-capacity nuclear steam generators designed for large-scale power plants. This segment is predominantly led by next-generation nuclear reactor technologies, including advanced PWRs, BWRs, and fast breeder reactors. Countries with strong nuclear energy policies, such as China, Russia, and the United States, are increasingly focusing on the development of ultra-large nuclear reactors to meet rising electricity demands and achieve energy security. Large-capacity nuclear steam generators ensure higher efficiency, lower operational costs per megawatt, and extended service life, making them an essential component of modern nuclear power plants. Additionally, as the global energy transition accelerates, investments in next-generation nuclear power projects continue to rise, further fueling the demand for high-capacity nuclear steam generators.

Global Nuclear Steam Generator Market, Segmentation by Geography

In this report, the Global Nuclear Steam Generator Market has been segmented by Geography into five regions; North America, Europe, Asia Pacific, Middle East & Africa and Latin America.

Global Nuclear Steam Generator Market Share (%), by Geographical Region, 2024

North America holds a significant portion of the market share, largely attributed to the United States' extensive nuclear power infrastructure. The region's focus on modernizing and refurbishing aging nuclear facilities has bolstered the demand for nuclear steam generators. Additionally, technological advancements and stringent safety regulations have further solidified North America's position in the market. Canada's utilization of pressurized heavy water reactors (PHWRs) also contributes to the region's market share.

Asia-Pacific is emerging as the fastest-growing region in the nuclear steam generator market. Countries like China and India are at the forefront, driven by rapid industrialization, urbanization, and a burgeoning energy demand. China, in particular, has been proactive in expanding its nuclear power capabilities, with numerous new projects underway. The Chinese government's commitment to constructing additional nuclear power plants in the coming years is a testament to this growth trajectory. India's energy strategy also emphasizes nuclear power as a means to meet its increasing electricity requirements while reducing carbon emissions. The region's focus on adopting advanced nuclear technologies and expanding its nuclear fleet underscores its ascending market share.

Europe maintains a robust presence in the nuclear steam generator market, with countries like France and Russia leading the charge. France's long-standing reliance on nuclear energy for a substantial portion of its electricity generation underscores its significant market share. Russia's dominance in the European nuclear steam generator market is evident through its extensive network of operational reactors and the presence of several manufacturing companies specializing in steam generator production. The region's commitment to reducing greenhouse gas emissions and transitioning to sustainable energy sources further propels the demand for nuclear steam generators.

The Middle East and Africa region is gradually increasing its footprint in the nuclear steam generator market. Several countries are in the initial phases of nuclear power plant construction, aiming to diversify their energy mix and reduce dependence on fossil fuels. Saudi Arabia, for instance, has articulated plans to achieve a significant local content percentage for its nuclear program before 2030. Similarly, Jordan and other nations are exploring nuclear energy options to meet their growing electricity demands. These initiatives indicate a positive trajectory for the region's market share in the foreseeable future.

Latin America currently holds a smaller share of the global nuclear steam generator market. However, countries like Brazil and Argentina have operational nuclear power plants and are exploring avenues to expand their nuclear energy capabilities. While the growth rate in this region is modest compared to others, ongoing discussions and plans for new nuclear projects could potentially enhance Latin America's market share in the coming years.

This report provides an in depth analysis of various factors that impact the dynamics of Global Nuclear Steam Generator Market. These factors include; Market Drivers, Restraints and Opportunities Analysis.

Drivers, Restraints and Opportunity Analysis

Drivers :

• Rising Demand for Clean Energy
• Growing Energy Needs

• Long-Term Cost Stability - The Global Nuclear Steam Generator Market offers a compelling value proposition in terms of long-term cost stability, positioning nuclear energy as a reliable and economically viable option for electricity generation. One of the primary advantages of nuclear power is its ability to provide long-term certainty over electricity costs. Unlike fossil fuel-based energy sources, nuclear power plants benefit from stable fuel costs and minimal price volatility, contributing to predictable and consistent electricity pricing over the lifespan of nuclear power plants.

  Moreover, nuclear generation offers significant cost advantages over the long term due to its relatively lower operating costs compared to other forms of electricity generation. While the upfront capital investment for nuclear power plants may be substantial, the operational expenses, including fuel and maintenance costs, are comparatively lower, resulting in favorable economics over the plant's operational lifetime. This cost stability is particularly attractive to utilities and power producers seeking to mitigate risks associated with fuel price fluctuations and regulatory uncertainties.

Restraints :

• Safety Concerns

• Nuclear Waste Disposal - In the Global Nuclear Steam Generator Market, nuclear waste disposal emerges as a critical aspect of the nuclear energy lifecycle, presenting both challenges and opportunities for stakeholders. Nuclear waste, generated during the operation of nuclear power plants, must be managed and disposed of safely and responsibly to mitigate environmental and health risks. Various disposal methods are employed, including deep geological repositories, interim storage facilities, and reprocessing techniques, each with its own set of advantages and challenges.

  Deep geological repositories represent a long-term solution for the permanent disposal of high-level nuclear waste, providing a secure underground storage environment designed to isolate radioactive materials from the biosphere for thousands of years. Countries around the world are actively pursuing the development of such repositories, with projects underway in regions like Finland, Sweden, and the United States. Additionally, interim storage facilities play a crucial role in safely storing spent nuclear fuel until permanent disposal solutions become available. Reprocessing technologies offer another avenue for nuclear waste management, allowing for the extraction of reusable materials from spent fuel, thereby reducing the volume and radiotoxicity of waste requiring disposal. As the global nuclear energy industry continues to expand, effective nuclear waste disposal strategies will be essential to ensure the long-term sustainability and safety of nuclear power generation.

Opportunity :

• Technological Advancements
• Plant Life Extensions

• Decommissioning and Replacement - The Global Nuclear Steam Generator Market is witnessing a significant trend towards decommissioning and replacement activities as aging nuclear power plants reach the end of their operational lifespans. Decommissioning involves the safe and systematic shutdown of nuclear facilities, including the removal and disposal of steam generators, to ensure compliance with regulatory requirements and mitigate environmental risks. As a result, there is a growing demand for specialized services and technologies to facilitate the decommissioning process while ensuring safety and minimizing environmental impact.

  Simultaneously, the need for steam generator replacement is becoming increasingly prevalent as existing units become obsolete or experience performance degradation over time. Replacement projects involve the installation of new steam generators with advanced designs and improved efficiency to enhance the reliability and safety of nuclear power plants. These replacements also offer opportunities to incorporate innovative technologies and design enhancements to optimize plant performance and extend operational lifespans.

Key players in Global Nuclear Steam Generator Market include

• Mitsubishi Heavy Industries Ltd
• Westinghouse Electric Company LLC
• Bharat Heavy Electricals Limited
• Hitachi-GE Nuclear Energy Ltd
• BWX Technologies Inc
• Bilfinger SE
• Larsen & Toubro Limited
• Doosan Corp
• Babcock & Wilcox Enterprises Inc

Toshiba America Energy Systems Corporation

In this report, the profile of each market player provides following information:

• Company Overview and Product Portfolio
• Key Developments
• Financial Overview
• Strategies
• Company SWOT Analysis