The Natrium technology: Providing reliable, carbon-free energy to complement wind and solar

April 6, 2021, 7:00AMANS Nuclear Cafe
An artist’s rendering of Natrium. Image: TerraPower

Around the world, national and local policymakers and business leaders are making bold and ambitious commitments to clean energy goals. In the United States, one in three Americans now lives in a city or state that has committed to or has achieved 100 percent clean electricity, according to the Luskin Center for Innovation at the University of California–Los Angeles.

Road to advanced nuclear: How DOE and industry collaborations are paving the way for advanced nuclear reactors

April 2, 2021, 8:58AMNuclear NewsCory Hatch

As electric utilities rush to reduce carbon emissions by investing in intermittent renewables such as wind and solar, they often rely heavily on fossil fuels to provide steady baseload power.

More than 60 percent of the nation’s electricity is still generated with fossil fuels, especially coal-fired and gas-fired power plants that have the ability to quickly ramp up or ramp down power to follow loads on the electric grid. Most experts agree that even with a radical advancement in energy storage technology, relying exclusively on wind and solar to replace fossil fuels won’t be enough to maintain a stable electric grid and avoid the major impacts of climate change.

To complete the transition to a carbon-free energy future, one key piece of the puzzle remains: nuclear power.

Partnership supports siting Xe-100 demo in Washington state

April 1, 2021, 3:00PMNuclear News
U.S. Rep. Dan Newhouse (R., Wash.) observes as (from left) Energy Northwest CEO Brad Sawatzke, X-energy CEO Clay Sell, and Grant PUD CEO Kevin Nordt sign the TRi Energy Partnership MOU on April 1 at the Port of Benton in Richland, Wash. Photo: Energy Northwest

Building the nation’s first advanced reactor is the goal of a partnership formed between X-energy, Energy Northwest, and the Grant County (Washington) Public Utility District (PUD).

The TRi Energy Partnership will support the development and demonstration of X-energy’s Xe-100 high-temperature gas reactor, which was selected by the Department of Energy for a cost-shared commercial demonstration by 2027 through the DOE’s Advanced Reactor Demonstration Program (ARDP). The new partnership was announced on April 1, when Clay Sell, X-energy’s chief executive officer; Brad Sawatzke, Energy Northwest’s CEO; and Kevin Nordt, the Grant County PUD’s CEO, met in Richland, Wash., to sign a memorandum of understanding.

NCSU to host SMR technical library with support from endowment

April 1, 2021, 9:32AMNuclear News

The North Carolina State University (NCSU) Libraries Department and the Department of Nuclear Engineering are collaborating to build a small modular reactor technical library at NCSU. The library resources will be available to the NCSU research community and to TerraPower/GE Hitachi and X-energy, both of which have signed teaming agreements with NCSU researchers to support planned advanced reactor demonstrations within the next seven years.

Making the new library collection possible: a generous donation from NCSU alumnus Stephen Rea, who together with his wife, Phyllis, formed the Stephen and Phyllis Rea Endowment for Mechanical Engineering Collections in 2015.

“We wanted to seed the endowment and grow it through donations to pursue research and development of green advanced power generation technologies,” Rea explained. “Supporting the advancement of SMR technology development fits our mission statement perfectly.”

NC State celebrates 70 years of nuclear engineering education

March 29, 2021, 3:00PMANS News
An early picture of the research reactor building on the North Carolina State University campus. The Department of Nuclear Engineering is celebrating the 70th anniversary of its nuclear engineering curriculum in 2020–2021. Photo: North Carolina State University

The Department of Nuclear Engineering at North Carolina State University has spent the 2020–2021 academic year celebrating the 70th anniversary of its becoming the first U.S. university to establish a nuclear engineering curriculum. It started in 1950, when Clifford Beck, then of Oak Ridge, Tenn., obtained support from NC State’s dean of engineering, Harold Lampe, to build the nation’s first university nuclear reactor and, in conjunction, establish an educational curriculum dedicated to nuclear engineering.

The department, host to the 2021 ANS Virtual Student Conference, scheduled for April 8–10, now features 23 tenure/tenure-track faculty and three research faculty members. “What a journey for the first nuclear engineering curriculum in the nation,” said Kostadin Ivanov, professor and department head.

U.S. nuclear in spotlight at Senate hearing

March 26, 2021, 9:32AMNuclear News
Sen Joe Manchin gives his opening statement at the March 25 hearing.

The Senate Energy and Natural Resources Committee yesterday held a hearing to examine the latest developments in the U.S. nuclear energy sector, with a focus on ways to maintain and expand the use of nuclear in the United States and abroad.

Testifying before the committee were Jeffrey Lyash, president and chief executive officer of the Tennessee Valley Authority (TVA); Chris Levesque, president and CEO of TerraPower, Scott Melbye, president of Uranium Producers of America (UPA); Amy Roma, founding member of the Atlantic Council’s Nuclear Energy and National Security Coalition and a partner with the law firm Hogan Lovells; and J. Clay Sell, CEO of X-energy.

Senate hearing to focus on nuclear energy

March 24, 2021, 3:00PMANS Nuclear Cafe

The U.S. Senate Energy and Natural Resources Committee (ENR) will hold a hearing on Thursday, March 25, to examine the latest developments in the nuclear energy sector, with a focus on ways to maintain and expand the use of nuclear energy in the United States and abroad.

The hearing can be viewed live at 9:45 a.m. EST. More information about the hearing is available online.

Gates highlights nuclear’s role in fighting climate change

February 19, 2021, 9:29AMANS Nuclear Cafe


Bill Gates is making the media rounds to promote his new book, How to Avoid a Climate Disaster: The Solutions We Have and the Breakthroughs We Need, which was released on Tuesday. Along the way, he’s been touting nuclear energy as part of his master plan for battling climate change.

60 Minutes: Gates kicked off the week with an appearance on 60 Minutes on Sunday. During the nearly 15-minute segment with correspondent Anderson Cooper, Gates discussed TerraPower, the company he founded in 2006 that is dedicated to nuclear innovation. “Nuclear power can be done in a way that none of those failures of the past would recur, because just the physics of how it's built,” Gates said, referring to TerraPower’s Natrium reactor. “I admit, convincing people of that will be almost as hard as actually building it. But since it may be necessary to avoid climate change, we shouldn't give up.”

PRA standard for Advanced Non-Light Water Reactors just issued

February 9, 2021, 7:03AMNuclear News

ANSI/ASME/ANS RA-S-1.4-2021, “Probabilistic Risk Assessment Standard for Advanced Non-Light Water Reactor Nuclear Power Plants,” has just been issued. Approved by the American National Standards Institute (ANSI) on January 28, 2021, this joint American Society of Mechanical Engineers (ASME)/American Nuclear Society (ANS) standard sets forth requirements for probabilistic risk assessments (PRAs) used to support risk-informed decisions for commercial nuclear power plants and prescribes a method for applying these requirements for specific applications.

ANSI/ANS-RA-S-1.4-2021 and its preview are available in the ANS Standards Store.

DOE tags INL as “preferred alternative” to host the Versatile Test Reactor

November 19, 2020, 3:16PMNuclear News

Rendering of the proposed Versatile Test Reactor. Image: Idaho National Laboratory

The Department of Energy won’t publish its draft environmental impact statement (EIS) for the Versatile Test Reactor (VTR) until mid-December. In a November 19 announcement on Twitter, however, the DOE’s Office of Nuclear Energy said that the yet-to-be-released EIS lists Idaho National Laboratory as the preferred alternative to site the VTR.

The DOE plans to submit the draft EIS for public comments early next month. The DOE won’t make a final decision on the design, technology selection, and location for the VTR until the completion of the EIS and record of decision in late 2021.

Core Power thinks nuclear will make waves in commercial shipping

November 5, 2020, 9:40AMNuclear News

Illustration of Core Power’s modular MSR concept. Image: Core Power

Core Power is a tiny startup that is bullish on the prospects for nuclear-powered ocean transportation. The company announced on November 2 that it is part of a team that has applied for a cost-shared award from the Department of Energy’s Advanced Reactor Demonstration Program (ARDP) to build a prototype molten salt reactor (MSR). Core Power believes that MSRs could be used for propulsion or electricity generation to decarbonize the world’s commercial shipping fleet.

Based in London, England, Core Power is the only non-U.S. member of the team, which includes TerraPower, Southern Company, and Orano USA. As a marine engineering firm, Core Power says that it offers its ARDP partners “access to pent-up demand from a market with real customers.” An announcement of ARDP “risk reduction for future demonstrations” award winners is expected in December.

Versatility, leadership, and “the highest fast neutron flux in the history of ever”: Highlights from INL’s VTR webinar

November 2, 2020, 12:04PMNuclear News

Clockwise from top left are Craig Piercy, Ray Furstenau, Tom O’Connor, Sean McDeavitt, Tara Neider, and Judi Greenwald.

The Versatile Test Reactor’s conceptual design was approved in September, and a draft environmental impact statement could be released within the week. The completion of more project milestones leading to operation in 2026, however, will depend on congressional appropriations. An expert panel described the need for a state-of-the-art test reactor and the value that the VTR could bring to the U.S. nuclear R&D community over its 60-year lifetime during a recent webinar—“Advanced U.S. Nuclear Research and Development: A Briefing and Discussion on the VTR”—hosted by Idaho National Laboratory.

Craig Piercy, ANS executive director/CEO, moderated the webinar, introducing a project update from VTR executive director Kemal Pasamehmetoglu and facilitating a Q&A session with representatives of the Nuclear Regulatory Commission, the Department of Energy, universities, reactor developers, and the Nuclear Innovation Alliance. A recording of the October 29 webinar is available online. INL also has a video and information online on the VTR.

“I think that the VTR represents part of a larger effort to modernize our infrastructure, develop a new set of technologies, and really preserve our global leadership in the field,” said Piercy. Read on to learn more about the promise the VTR holds for the nuclear community.

U-233 processing restarts at Oak Ridge following upgrades

October 22, 2020, 7:01AMNuclear News

A fissile material handler uses a shielded glovebox to dissolve U-233 into a low-level form so that it can be mixed with grout for safe transportation and disposal. Photo: DOE

The processing and downblending of uranium-233 for disposal has resumed at Oak Ridge National Laboratory, following a pause in operations due to the COVID-19 pandemic, the Department of Energy announced on October 20. Removal and disposition of the U-233 is one of the DOE Office of Environmental Management’s highest priorities at the site, as stated in its strategic vision released earlier this year.

The project is removing a significant risk by eliminating the inventory of highly enriched fissile material stored in Building 3019, the world’s oldest operating nuclear facility, according to the DOE. Employees, known as fissile material handlers, use shielded gloveboxes to dissolve U-233 into a low-level form so that it can be mixed with grout for safe transportation and disposal. The material dates back decades and was originally pursued as a fuel for reactors; however, it did not prove to be a viable option.

It’s time for the United States to demonstrate advanced reactors

October 16, 2020, 9:04AMANS Nuclear CafeRita Baranwal

After talking about it for decades, the United States is finally ready to take the next step in demonstrating advanced reactor technologies.

We have the bipartisan support from Congress. We have the best innovators in the world. Now it’s time to see what U.S. nuclear companies can really do with the support and resources of the federal government.

The U.S. Department of Energy is all in on new nuclear technologies and we just made our boldest move yet—selecting and supporting two U.S. reactor designs that will be fully operational within the next 7 years.

After evaluating the competitive U.S. reactor design applications that were submitted to our new Advanced Reactor Demonstration Program funding opportunity announcement, TerraPower LLC and X-energy were awarded $160 million in initial funding to test, license, and build their advanced reactors under this aggressive timeframe. Pending future appropriations by Congress, the DOE will invest $3.2 billion over 7 years in these projects that will be matched by the industry teams.

ARDP picks divergent technologies in Natrium, Xe-100: Is nuclear’s future taking shape?

October 14, 2020, 7:21AMNuclear News

The Department of Energy has put two reactor designs—TerraPower’s Natrium and X-energy’s Xe-100—on a fast track to commercialization, each with an initial $80 million in 50-50 cost-shared funds awarded through the Advanced Reactor Demonstration Program (ARDP). In all, the DOE plans to invest $3.2 billion—with matching funds from industry—over the seven-year demonstration program, subject to future appropriations.

Energy Secretary Dan Brouillette announced the awards late in the day on October 13 in Oak Ridge, Tenn., and said, “These awards are a critical first step of a program that will strengthen our nation’s nuclear energy and technological competitiveness abroad, and position our domestic industry for growth, for increased job creation, and for even more investment opportunity. It’s absolutely vital that we make progress on this technology now.”

“Critical decision” keeps Versatile Test Reactor on target

September 24, 2020, 3:05PMNuclear News

The proposed Versatile Test Reactor complex would cover about 20 acres. Image: INL

Now that the Department of Energy has approved Critical Decision 1 for the Versatile Test Reactor (VTR) project, the engineering design phase can begin once Congress appropriates funding, according to a September 23 announcement from the DOE’s Office of Nuclear Energy. The DOE has requested $295 million for the project in fiscal year 2021.

The news came nearly one month after a team led by Bechtel National Inc. (BNI), and including GE Hitachi Nuclear Energy (GEH) and TerraPower, entered into contract negotiations with Battelle Energy Alliance (BEA) for the design-and-build phase of the VTR. GEH’s sodium-cooled fast reactor PRISM technology was selected to support the VTR program in November 2018.

TerraPower, Centrus, and Duke Energy talk tech and collaboration

September 23, 2020, 3:01PMNuclear News

Three companies that are part of a larger collaboration to develop and demonstrate Natrium, the fast reactor design recently introduced by TerraPower and GE Hitachi Nuclear Energy (GEH), were invited to participate in a webinar hosted by ClearPath to talk about Natrium’s design, fuel requirements, and load-following potential.

The September 21 webinar, titled “Natrium: Latin for Sodium, Big for Advanced Nuclear,” was moderated by Rich Powell, executive director of ClearPath, and featured TerraPower’s Chris Levesque and Tara Neider, Centrus Energy’s Dan Poneman, and Duke Energy’s Chris Nolan.

HALEU investment is key part of TerraPower’s demo proposal

September 17, 2020, 2:58PMNuclear News

TerraPower announced on September 15 that it plans to work with Centrus Energy to establish commercial-scale production facilities for the high-assay, low-enriched uranium (HALEU) needed to fuel many advanced reactor designs.

The proposed investment in HALEU fuel fabrication is tied to a TerraPower-led submittal to the Department of Energy’s Advanced Reactor Demonstration Program (ARDP), which was created to support the deployment of two first-of-a-kind advanced reactor designs within five to seven years. TerraPower would like one of those designs to be Natrium, the 345-MWe sodium fast reactor that it has developed with GE Hitachi Nuclear Energy.

TerraPower’s Natrium pairs a sodium fast reactor with heat storage

September 2, 2020, 3:00PMNuclear News

An artist’s rendering of Natrium. Image: TerraPower

The Natrium reactor and energy system architecture, recently introduced by TerraPower and GE Hitachi Nuclear Energy (GEH), offers baseload electricity output from a 345-MWe sodium fast reactor with the load-following flexibility of molten salt thermal storage. Stored heat can be used to boost the system’s output to 500 MWe for more than five and a half hours when needed, according to TerraPower. A company representative told Nuclear News that the company expects a commercial Natrium plant to cost $1 billion or less.

Negotiations to build Versatile Test Reactor under way

August 27, 2020, 7:05AMNuclear News

Artist’s rendering of the Versatile Test Reactor. INL Image

A team led by Bechtel National Inc. (BNI) that includes GE Hitachi Nuclear Energy (GEH) and TerraPower is in contract negotiations with Battelle Energy Alliance (BEA) for the design-and-build phase of the Versatile Test Reactor, BEA announced on August 24. As planned, the VTR would support irradiation testing of fuels, materials, and equipment designed for advanced reactors.