Nuclear Power - 91��Ƭ��

Clinch River Small Modular Reactor

Lindsey McGrath — Fri, 17 Apr 2026 15:32:55 +0000

Deploying Small Modular Reactor Technology

91��Ƭ�� is partnering with the Tennessee Valley Authority (TVA) to plan, license, and advance the deployment of a GE Vernova-Hitachi (GVH) small modular reactor (SMR) at the Clinch River Nuclear Site in Oak Ridge, Tennessee. In 2024, 91��Ƭ�� joined TVA’s Integrated Project Delivery team, working alongside TVA, GVH, and Sargent & Lundy.

The project is designed to meet the nation’s growing electricity demand, strengthen energy security, and lead the commercialization of advanced nuclear technology in the U.S. — proving that SMRs can be built cost-effectively and at scale.

Read the announcement

Next-Generation Reactor Technology and Digital Execution

300

Megawatt SMR

Capacity of light water reactor with passive safety systems

The project focuses on deploying a GVH BWRX-300 SMR, a 300-megawatt electric light water reactor with passive safety systems — the 10th generation of GVH’s proven boiling water reactor technology.

By producing steam directly inside the reactor pressure vessel, the design eliminates many external systems required by traditional reactors — reducing the complexity and size of the plant. Its passive safety systems allow the reactor to maintain optimal pressure and temperature for up to seven days without power or operator intervention — a significant improvement over conventional designs. This simplified approach can reduce the plant’s footprint by up to 90% compared to traditional large-scale boiling water reactors, helping lower construction costs.

In May 2025, TVA submitted a Construction Permit Application to the Nuclear Regulatory Commission for the project, a major milestone that advances Clinch River toward becoming the first boiling water SMR deployed in the United States.

Rendering of completed GVH BWRX-300 SMR at Clinch River Nuclear Site.

Building Nuclear’s Digital Future

91��Ƭ�� brings an integrated suite of standardized, Nuclear Quality Assurance-1 (NQA-1) qualified digital tools covering the full project lifecycle — from design through commissioning. Digital delivery enables real-time installation validation, improves schedule and cost certainty, maximizes efficiency across every phase of execution, and optimizes project delivery.

Integrated Delivery Backed by Nuclear Expertise

Unlike traditional nuclear construction projects in the United States, Clinch River will use an integrated project delivery approach. 91��Ƭ�� is working closely with TVA and its partners as a unified team to plan for procurement, construction, and commissioning of Clinch River Nuclear Unit 1. This model aligns all parties around a shared budget and schedule, enabling faster decision-making, reducing risk, and helping control costs. By combining the strengths of each partner, we’re advancing a more efficient path to deploy SMRs at scale — helping deliver more affordable, reliable, and secure energy.

Forty Years in Tennessee

91��Ƭ�� and TVA have worked together on nuclear projects for more than 40 years, supporting a range of energy and U.S. national security missions. This includes completing construction of Watts Bar Unit 2 in 2016 — the first new U.S. nuclear reactor to come online in the 21st century. 91��Ƭ�� has also supported national security missions at the Y-12 National Security Complex in Oak Ridge, just miles from the Clinch River site.

Since the 1950s, 91��Ƭ�� has been leading the nuclear industry, designing and constructing critical projects worldwide. We have contributed to more than 150 nuclear plants, bringing over 76,000 megawatts of new nuclear power online.

Decades of Nuclear Innovation Built by 91��Ƭ��

91��Ƭ�� is the only EPC company with current projects across the full spectrum of nuclear reactor technologies — including new AP1000® reactors in Poland, America’s first utility-scale Gen III+ small modular reactor for Tennessee Valley Authority at Clinch River, and TerraPower’s first Natrium® plant in Wyoming.

We maintain the largest nuclear-experienced talent pool of any EPC company, bringing together the expertise needed to deliver the future of nuclear energy now along with the latest in digital tools and mega-project delivery best practices to build with execution certainty.

As the only EPC contractor to successfully bring nuclear plants online in the U.S. this century, we have safely delivered 76 gigawatts of nuclear power over the last seven decades.

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Poland AP1000® Nuclear Power Plant

Lindsey McGrath — Tue, 05 Nov 2024 01:49:01 +0000

Delivering Poland’s Energy Future

91��Ƭ�� has been selected to partner on the design and construction of Poland’s first nuclear power plant at the Lubiatowo-Kopalino site in Pomerania. In partnership with Westinghouse Electric Company and Polish utility Polskie Elektrownie Jądrowe, Bechtel will deliver three AP1000^® reactors for its inaugural nuclear energy program.

91��Ƭ�� will perform the Engineering, Procurement and Construction activities to construct 3 AP1000^® units at the Lubiatowo-Kopalino site. Using once-through cooling to and from the Baltic Sea, the design uses a simplified and innovative approach to safety. 91��Ƭ��’s recent completion of two AP1000’s^{®&�Բ��;}at Plant Vogtle has set the stage for the deployment of this proven technology in Europe.

To learn more about 91��Ƭ��’s expertise and experience in nuclear, visit 91��Ƭ��.com at Nuclear Power Plant Project Construction | 91��Ƭ��.

1st

of its kind

Nuclear Power Plant in Poland

7500+

Jobs

At Peak Construction

Of Carbon-free Energy

Committed to Net Zero

Nuclear energy provides clean, reliable, and safe carbon-free energy, that is essential to achieving Poland’s net-zero and energy security goals. As a leader in the nuclear power industry, 91��Ƭ�� offers technical expertise that no other contractor can match.

91��Ƭ��’s current portfolio includes large scale reactors such as Vogtle, and also small modular reactors/advance reactors including the Natrium Advanced Demonstration Reactor in the U.S.

For 70 years, 91��Ƭ�� has helped customers deliver clean energy through nuclear.

In that time, 91��Ƭ�� has designed, built, or provided construction services on 150 nuclear plants worldwide, bringing more than 76,000 megawatts of new nuclear generation capacity to the world.

Recent News About Poland’s First Nuclear Power Plant

AP1000 is a trademark or registered trademark of , its affiliates and/or its subsidiaries in the United States of America and may be registered in other countries throughout the world. All rights reserved. Unauthorized use is strictly prohibited.

Decades of Nuclear Innovation Built by 91��Ƭ��

As the only EPC contractor to successfully bring nuclear plants online in the U.S. this century, we have safely delivered 76 gigawatts of nuclear power over the last seven decades.

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Natrium® Project

Lindsey McGrath — Wed, 13 Nov 2024 19:44:41 +0000

Delivering The Future of Energy

91��Ƭ�� is constructing the facilities that will enable our partner TerraPower in building the first Natrium Plant and delivering the future of nuclear energy. By breaking ground in 2024, 91��Ƭ�� continues to play a pivotal role in shaping the future nuclear landscape.

In 2025, 91��Ƭ�� teams advanced through construction milestones on the Test and Fill Facility (TFF). We successfully poured the concrete for the TFF foundation and erected the steel framework. The TFF will serve as critical infrastructure, laying the groundwork for safe, efficient operations and long-term success at the Kemmerer site.

The project��also awarded 44 major procurements and contracts with a total value of $100 million, including the Molten Salt Tank design, the Steam Turbine Generator, the Steam Generator System, and the Mechanical, Electrical, and Piping subcontract for the TFF. The Natrium Plant’s design��represents��a major leap forward in sustainable power generation. 91��Ƭ�� is proud to help bring this visionary project to life, shaping the future of energy for generations to come.��

Advance Reactor Technology

91��Ƭ�� is partnering with TerraPower on the first-of-a-kind Natrium plant in Kemmerer, Wyoming. The Natrium Reactor is a TerraPower & GE Vernova Hitachi Nuclear Energy Technology. The project is a part of the U.S. Department of Energy’s Advanced Reactor Demonstration Program (DOE Cooperative Agreement No. DE-NE0009054). With a sodium fast reactor, integrated energy storage and flexible power production, the Natrium plantoffers carbon-free energy at a competitive cost and is ready to integrate seamlessly into electric grids with high levels of renewables. 91��Ƭ�� adds current and unmatched experience managing and executing large nuclear projects to the team.

A Legacy of Excellence in Nuclear Power

With a legacy dating back to the 1950s, 91��Ƭ�� has been a driving force in the evolution of nuclear power. Having designed, built, or provided services to over 80 nuclear reactors in the United States and 150 worldwide, 91��Ƭ��’s history in nuclear power is a testament to its unwavering commitment to excellence and innovation. From delivering next generation reactor technologies to setting industry standards for safety and efficiency, 91��Ƭ�� has played a pivotal role in shaping the global nuclear landscape.

The Vision

Set against the backdrop of a retiring coal plant in Kemmerer, Wyoming, this advanced energy demonstration seeks to validate the design, construction, and operational features of the Natrium plant. As the nexus of TerraPower and GE Vernova Hitachi technology, the Natrium plant represents a leap forward in sustainable power generation. The project will bring a commercial operating, advanced nuclear reactor online that will deliver carbon-free, reliable power to the electric grid and provide good-paying jobs in Wyoming for decades to come.

Fast Facts

500

Megawatts

Output of Power When Needed

400K

Homes

Equivalent of Power Produced

TerraPower is leading the way in bringing the next generation of nuclear energy to market.
The Natrium plant is built for the 21st century grid and is one of the fastest and lowest-cost paths to advanced clean energy that the world needs.
The Natrium plant — a 345-megawatt sodium fast reactor coupled with a molten salt-based integrated energy storage system — provides clean, flexible energy and stability for the grid.

91��Ƭ��’s Contribution

91��Ƭ�� brings decades of experience and expertise to the table. With a proven track record in delivering complex infrastructure projects, 91��Ƭ�� is uniquely positioned to tackle the challenges inherent in constructing a first-of-its-kind nuclear facility. From meticulous planning to precise execution, 91��Ƭ��’s commitment to excellence ensures that the Natrium plant will set new standards for safety, efficiency, and innovation.

Digital Delivery

The Natrium plant stands as a testament to our commitment to innovation in nuclear construction. By pioneering our Digital Delivery approach, we are revolutionizing the nuclear industry’s landscape. This cutting-edge methodology, now being implemented in our latest projects such as the Natrium plant and the Poland AP1000 Project, marks a paradigm shift.

Our approach integrates advanced technologies like 3D Building Information Modeling (BIM) within a Central Data Environment, seamlessly streamlining workflows from design to procurement, construction, and handover. This digital framework enables electronic creation and completion of construction work packages, including digital signatures and real-time updates, eliminating the inefficiencies of paper-based processes. Digital delivery and innovation help to increase time on tools, improving productivity in the field, and fostering transparency with our customer along with creating efficiencies that lead to successful completion and operations.

Join us as we embark on this transformative journey towards a sustainable energy future with the Natrium plant. Together, we can shape a world where energy knows no bounds.

Additional Links

In April 2026, 91��Ƭ�� and TerraPower began mobilizing teams and transitioning into field execution at the Natrium® Kemmerer Unit 1 (KU1) site in Wyoming. 91��Ƭ�� and TerraPower Begin Construction at Natrium® Kemmerer Unit 1

In December 2025, TerraPower received notification from the NRC that they have successfully completed the Final Safety Evaluation.

In October 2025, TerraPower received notification from the NRC that they have successfully completed the Environmental Impact Statement (EIS).

In August 2025, 91��Ƭ�� and TerraPower, started construction on the state-of-the-art Kemmerer Training Center (KTC), at the Kemmerer site.

In June 2024, 91��Ƭ�� and TerraPower celebrated the official groundbreaking of the Natrium Demonstration Project. America’s Next Nuclear Power Plant Begins Construction | 91��Ƭ��

91��Ƭ�� President and COO Craig Albert reflects on the significance of the Natrium reactor’s innovative design. What’s New About America’s Next Nuclear Power Plant? Everything | 91��Ƭ��

In October 2020, the U.S. Department of Energy (DOE) awarded TerraPower funding, as part of the Advanced Reactor Demonstration Program, to demonstrate the Natrium technology. 91��Ƭ��-Affiliated Team Picked for Nuclear Project | 91��Ƭ��

In October 2020, TerraPower chooses 91��Ƭ�� as engineering, procurement, and construction partner for the Natrium Demonstration Project. TerraPower Chooses 91��Ƭ�� as Partner | 91��Ƭ��

TerraPower announced on March 29 the submission of its construction permit application to the .

Decades of Nuclear Innovation Built by 91��Ƭ��

As the only EPC contractor to successfully bring nuclear plants online in the U.S. this century, we have safely delivered 76 gigawatts of nuclear power over the last seven decades.

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Vogtle Units 3 and 4

Lindsey McGrath — Sun, 06 Oct 2024 23:49:55 +0000

91��Ƭ�� Delivers America’s First New Nuclear Units in 30+ Years

At 91��Ƭ��, we don’t shy away from tough projects — we step in when others step back. In 2017, Georgia Power and Southern Nuclear brought 91��Ƭ�� in midway to complete two new AP1000 nuclear reactors at Plant Vogtle in Waynesboro, Georgia — the first new nuclear units built in the U.S. in over 30 years.

Since the 1950s, 91��Ƭ�� has led the industry, delivering more than 150 nuclear power plants worldwide. With strong labor partnerships and supply chains, we delivered one of the most complex energy projects in U.S. history.

Together, Units 3 and 4 mark the rebirth of U.S. nuclear power — proving that America can once again build world-class reactors to meet its clean energy goals.

9000

Craft Professionals

At peak, more than 9,000 craft professionals worked on site.

70000000��

Work Hours

Achieved 70 million work hours without a lost-time incident.

30%

Less

After completing Unit 3 at Vogtle, 91��Ƭ�� drove costs down by 30% when delivering Unit 4.

Restoring U.S. Nuclear Leadership
The U.S. should aim for a thriving nuclear industry that provides a competitive alternative for nations in the global market. Plant Vogtle is already moving us in the right direction. It has begun rebuilding the United States’ muscle memory in nuclear construction, including reestablishing critical supply chains. Designing and building a nuclear power plant requires extreme precision, with safety and performance criteria far exceeding those in other types of construction.
Brendan 91��Ƭ��
Chairman and CEO, BEchtel

Brendan 91��Ƭ�� on America’s nuclear comeback

A Proven Workforce with Nuclear Expertise

Building Vogtle Units 3 and 4—the nation’s second-largest construction project—required an extraordinary workforce. At peak, more than 9,000 skilled professionals worked onsite, making it the largest construction effort in Georgia’s history.

Through our partnership with North America’s Building Trades Unions, we brought together talent through the project from Apprenticeship Readiness Programs (ARPs) and Helmets to Hardhats, creating a pipeline of trained, job-ready workers. More than 30% of Vogtle hires were veterans and reservists, bringing discipline, technical skill, and leadership to the project.

ARP apprentices earned while they learned—advancing toward journeyperson status while receiving healthcare and retirement benefits. The workforce also set new standards for inclusion: over 40% of ARP apprentices were women, and more than 80% came from underrepresented groups.

Importantly, these men and women now bring proven nuclear construction experience—ready to be deployed to accelerate future nuclear projects across the United States.

The Vogtle Story: 91��Ƭ�� Steps In

Our story at Vogtle began long before we completed Units 3 and 4. 91��Ƭ��’s history with the plant dates back to the 1980s when we helped build Units 1 and 2. Both units remain in service today under extended licenses.

In 2017, Georgia Power and Southern Nuclear turned to 91��Ƭ�� to get Units 3 and 4 back on track after years of failed attempts by others.

In 2023 and 2024, we delivered Vogtle Units 3 and 4—built to operate safely for 60 years and cut carbon emissions equal to removing 1 million cars from the road annually.

Digital Delivery: Building at Scale

91��Ƭ�� delivers nuclear projects with greater speed and certainty by leveraging digital tools, modular construction, and proven designs.

Real-time data streamlines decisions and workflows, advanced modularization improves quality and reduces risk, and repeatable strategies—which we’ve refined through our mega-project experience—help drive down costs and accelerate schedules.

Writing the Playbook on Nuclear

For more than 70 years, 91��Ƭ�� has delivered nuclear construction worldwide—including gigawatt reactors, small modular reactors, and advanced reactors. From early site selection to final startup, we provide full-service solutions powered by the latest digital tools.

That legacy now includes Vogtle Units 3 and 4, the first new U.S. nuclear builds in more than three decades. More than 1,500 91��Ƭ�� professionals gained hands-on nuclear experience across every phase of construction, creating a workforce ready to deliver the next generation of projects.

With decades of expertise, strengthened supply chains, and proven project systems, 91��Ƭ�� is prepared to lead America’s nuclear resurgence.

Decades of Nuclear Innovation Built by 91��Ƭ��

As the only EPC contractor to successfully bring nuclear plants online in the U.S. this century, we have safely delivered 76 gigawatts of nuclear power over the last seven decades.

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Watts Bar Completion

Lindsey McGrath — Fri, 15 Nov 2024 20:24:03 +0000

Generating 1,150 Megawatts of Low-cost, Carbon-free Electricity

The Tennessee Valley Authority provides electricity to some 10 million customers in the southeastern United States.

With a dynamic and adaptable porfolio of plants, TVA has undertaken a program to replace coal-fired power with cleaner generation. TVA’s seven nuclear reactors are stable and reliable contributors of 24/7 carbon-free electricity

In 2007, with demand again increasing, TVA decided to complete construction and awarded the project to 91��Ƭ��. The project brought the plant up to all current engineering standards. Watts Bar Unit 2 is the first new nuclear reactor to receive authorization to operate this century.

In 2015, construction was completed on Watts Bar Unit 2, a TVA nuclear power plant in the state of Tennessee that was placed on hold some 30 years ago. Unit 2 was about 60 percent finished in 1985 when construction was halted due to a projected decrease in demand for electricity.

First Nuclear Plant to Meet New, More Stringent NRC Standards

Watts Bar Unit 2 is a pressurized water reactor, in which water heated by nuclear fuel rods becomes steam that drives a turbine to generate power. The unit added nearly 1,200 megawatts to TVA’s power system—enough electricity to power some 650,000 homes—without generating greenhouse gases.

In June of 2015, Watts Bar became the first nuclear power plant in the United States to complete safety upgrades and meet new Nuclear Regulatory Commission regulations established after the 2011 earthquake and tsunami that struck Fukushima Daiichi Nuclear Power Station in Japan.

By October 2016, commercial operation of Unit 2 was achieved and Watts Bar officially became a dual-unit site.

TVA has invested in nuclear power as a key component to generating safe, reliable, clean and low-cost energy. The continued safe and reliable performance of TVA’s nuclear fleet and the integration of Watts Bar as a dual-unit site in a safe and high-quality manner are essential in serving the 9 million people in the Tennessee Valley.

Safe, Quality Work and Local Economic Development

Watts Bar Unit 2 employed nearly 3,200 workers during construction and added about 250 permanent workers for operation of the plant. The project also provided economic benefits to the area through regional purchases of supplies and services.

Avoiding up to 8 million tons of carbon dioxide per year

Watts Bar Unit 2 helps help meet the demand for electricity in the Tennessee Valley with low-cost, carbon-free electricity. It will help replace older, more costly, and less efficient coal units that are being retired. One nuclear unit can make as much electricity as five to 10 coal units without carbon emissions. Experts estimate that Watts Bar Unit 2 will help TVA avoid coal-fired emissions of between 6 million and 8 million tons of carbon dioxide a year.

Milestone Announcements

October 22, 2015 — 91��Ƭ�� Applauds Successful Licensing of Second Reactor at Watts Bar Nuclear Plant
Read the Press Release
August 19, 2015 — 91��Ƭ�� Salutes TVA, Workforce on Major Milestone for U.S. Nuclear Plant
Read the Press Release
Date? Watts Bar Begins Commercial Operation
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Decades of Nuclear Innovation Built by 91��Ƭ��

As the only EPC contractor to successfully bring nuclear plants online in the U.S. this century, we have safely delivered 76 gigawatts of nuclear power over the last seven decades.

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Davis-Besse Nuclear Power Station

Lindsey McGrath — Tue, 05 Nov 2024 01:47:29 +0000

Completing a Steam Generator Replacement Project Requires Skill and Customer Collaboration

Owned by FirstEnergy Nuclear Operating Company, Davis-Besse is a pressurized-water nuclear reactor that produces 908 megawatts of electricity, enough to power 450,000 homes without producing greenhouse gasses. Maintenance on nuclear power plants is complex and critical to their safe, ongoing operations. When done correctly, it extends a plant’s operating life by decades.

FirstEnergy selected 91��Ƭ�� to replaced the two “once-through” steam generators and the reactor vessel closure head at Davis-Besse Nuclear Power Station near Oak Harbor, southeast of Toledo, Ohio.

The generators function as heat exchangers, producing the steam that drives the turbine generator. Each of the new steam generators for Davis-Besse weighs 550 tons. 91��Ƭ�� was the original architect engineer for Davis-Besse when the plant was constructed in the 1970s. We also performed the Davis-Besse head replacement in 2002 and the Beaver Valley Unit 1 steam generator replacement in 2006

During the course of more than 30 years, 91��Ƭ�� has set records for the lowest radiation exposure, shortest replacement outages, and best employee safety performing its steam generator replacement work.

The Replacement Process

In the world of steam generator replacements, crews must work amid radiological conditions and space constraints that change as the project evolves. Because access is so tight, welding can be particularly difficult. Workers also must contend with hot pipes, and dust and smoke must be controlled. All of this puts a premium on safety and planning.

For the Davis-Besse job, which required 500 workers, 91��Ƭ�� performed its usual training beforehand on a mockup of the unit to ensure that craft workers are proficient in containment vessel cutting, welding, and post-weld heat-treating.

Extending Plant Life

Plant owners can prolong a generator’s life with enhanced maintenance and testing programs, but they often discover that it’s less expensive to replace them. Enhanced maintenance efforts can cost millions of dollars over time and result in additional radiation doses for plant workers who must come in contact with the equipment. Frequent repairs also can place the plant at risk for an unplanned outage.

91��Ƭ�� was architect-engineer for the original two-unit Davis-Besse facility, completed in 1978. The relationship between 91��Ƭ�� and owner FirstEnergy expanded to include operating plant support for Davis-Besse Unit 1 as well as the utility’s other nuclear plants, including Perry Unit 1, also in Ohio, and Beaver Valley Units 1 and 2, in Shippingport, Pennsylvania.

When Davis-Besse’s reactor pressure vessel closure head needed replacement in 2002, First Energy trusted 91��Ƭ�� to complete the project — the first such replacement in the United States. FirstEnergy later tapped 91��Ƭ�� to perform a steam generator replacement at Beaver Valley Unit 1 in 2006.

How does a steam generator work?

Steam generators use heat from a nuclear power plant’s reactor core to create steam, which drives the plant’s turbines to create electricity.

Each steam generator contains thousands of alloy tubes through which hot radioactive water is pumped under high pressure. This process prevents the water from boiling. As the water flows through the tubes, it heats nonradioactive water outside the tubes to make steam.

A typical steam generator has more than 3,000 alloy tubes. The tubes are expected to last for about 40 years, but metallurgy and water chemistry issues often shorten their useful lives considerably. When about 15 percent of these tubes have corroded, a plant suffers from significant maintenance costs and the inability to maintain full power.

Decades of Nuclear Innovation Built by 91��Ƭ��

As the only EPC contractor to successfully bring nuclear plants online in the U.S. this century, we have safely delivered 76 gigawatts of nuclear power over the last seven decades.

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