TerraPower’s Natrium pairs a sodium fast reactor with heat storageNuclear NewsPower & OperationsSeptember 2, 2020, 3:00PM|Nuclear News StaffAn artist’s rendering of Natrium. Image: TerraPowerThe 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.What they’re saying: “TerraPower values collaboration with GE Hitachi to make nuclear generation as affordable as possible,” said Chris Levesque, TerraPower’s president and chief executive officer. “Our exceptional technology development capabilities, unmatched financing credibility, and achievable funding strategy mean that the Natrium technology will be available in the late 2020s, making it one of the first commercial advanced nuclear technologies.”Jay Wileman, GEH president and CEO, said, “We designed this system with operator input to potentially increase their revenues by 20 percent through the use of energy storage.”Natrium, which gets its name from the Latin for sodium, is designed to integrate into power grids with high penetrations of renewables, follow the daily electric load, and take advantage of peaking prices. The molten salt thermal storage technology that makes it possible is already in use at utility-scale solar thermal plants.Design essentials: Both TerraPower and GEH have experience designing and developing sodium fast reactors. “The Natrium system combines molten salt energy storage with the best of the Traveling Wave Reactor and PRISM technologies, along with additional innovations and improvements,” according to TerraPower. “The team has dramatically improved plant performance and economics, resulting in a sodium fast reactor that competes economically in the U.S. and other countries.”Nonnuclear mechanical, electrical, and other equipment would be housed at a distance from the reactor and in separate structures that could be built to industrial standards rather than nuclear standards, reducing costs. The design would reduce the amount of nuclear-grade concrete by 80 percent compared to large reactors, according to TerraPower.Heat transport: To get the reactor’s heat to energy storage and electricity generation, Natrium makes use of three heat transport fluids: liquid metal sodium, molten nitrate salt, and water. According to TerraPower, in the primary system the sodium-cooled nuclear core produces heat that is transferred to the molten salt through a heat exchanger. The molten salt flows from the nuclear island to the energy island where the hot salt may be stored or directly supplied to the steam generation system. The steam generation system then produces high-pressure, superheated steam that the turbine/generator converts to electrical power.Advanced Reactor Demonstration Program: TerraPower, GE Hitachi, and Bechtel have submitted a proposal based on Natrium technology for the Department of Energy’s Advanced Reactor Demonstration Program (ARDP).“For the ARDP proposal, Bechtel adds current and unmatched experience managing and executing large nuclear projects, and the team’s utility partners bring operating capabilities alongside a market demand for utility-scale advanced nuclear technologies,” TerraPower’s representative told NN.According to the company, Energy Northwest and Duke Energy have both expressed their support for the commercialization of Natrium through the ARDP. The project also has the backing of PacifiCorp, a subsidiary of Berkshire Hathaway Energy. TerraPower’s founders include Bill Gates, who serves as chairman of the board.Tags:advanced reactorsbechtelge hitachi nuclear energyheat storageintegrated energy systemssodium fast reactorsterrapowerShare:LinkedInTwitterFacebook
INL’s MARVEL could demonstrate remote operation on a micro scaleThe Department of Energy launched a 14-day public review and comment period on January 11 on a draft environmental assessment for a proposal to construct the Microreactor Applications Research Validation & EvaLuation (MARVEL) project microreactor inside Idaho National Laboratory’s Transient Reactor Test (TREAT) Facility.The basics: The MARVEL design is a sodium-potassium–cooled thermal microreactor fueled by uranium zirconium hydride fuel pins using high-assay, low-enriched uranium (HALEU). It would be a 100-kWt reactor capable of generating about 20 kWe using Stirling engines over a core life of about two years.The DOE proposes to install the MARVEL microreactor in a concrete storage pit in the north high bay of the TREAT reactor building. Modifications to the building to accommodate MARVEL are anticipated to take five to seven months. Constructing, assembling, and performing preoperational testing are expected to take another two to three months prior to fuel loading.Go to Article
Hitachi sunsets HorizonHitachi Ltd. plans to close Horizon Nuclear Power, its U.K. nuclear development subsidiary, early this spring, according to weekend news reports. Horizon is the firm behind Wylfa Newydd, the proposed nuclear new-build project in Wales.On January 10, citing a story that appeared earlier that day in The Times, Yahoo reported that Hitachi will close Horizon by March 31—a move, Yahoo said, that “could scupper a sale of the [Wylfa Newydd] site, which has attracted interest from bidders, including a U.S. consortium of Bechtel, Southern Company, and Westinghouse, and dent [the] U.K.’s clean energy goals.”However, a January 11 item on a Welsh online news service stated, “It is understood that if a sale of the site is not secured before Horizon shuts, the sale process will be continued by Hitachi.”Go to Article
ARC-20 cost-share funds go to ARC Nuclear, General Atomics, and MITDesigns chosen for ARC-20 support could be commercialized in the mid-2030s. Graphic: DOEThe Department of Energy’s Office of Nuclear Energy (DOE-NE) has named the recipients of $20 million in Fiscal Year 2020 awards for Advanced Reactor Concepts–20 (ARC-20), the third of three programs under its Advanced Reactor Demonstration Program (ARDP). The three selected teams—from Advanced Reactor Concepts LLC, General Atomics, and the Massachusetts Institute of Technology—will share the allocated FY20 funding for ARC-20 and bring the total number of projects funded through ARDP to 10. DOE-NE announced the news on December 22.The DOE expects to invest a total of about $56 million in ARC-20 over four years, with industry partners providing at least 20 percent in matching funds. The ARDP funding opportunity announcement, issued in May 2020, included ARC-20 awards, Advanced Reactor Demonstration awards, and Risk Reduction for Future Demonstration awards.Go to Article
Study completed on BWRX-300 deployment in PolandThe completion of a study assessing the feasibility of deploying a fleet of GE Hitachi Nuclear Energy’s (GEH) BWRX-300 small modular reactors in Poland was announced recently by the Polish firm Synthos Green Energy (SGE). The feasibility study, which was prepared by Exelon Generation, was not made publicly available by SGE. The study covers the analysis of key aspects of SMR technology implementation, including cost issues, personnel policy, regulatory and security issues, construction models, and operational issues, according to SGE.SGE is a subsidiary of Synthos S.A., a manufacturer of synthetic rubber and one of the biggest producers of chemical raw materials in Poland. According to SGE, it views SMR technology as an opportunity for the deep decarbonization of Polish industry and the country's heating sector.Go to Article
Advanced reactors take center stage in Popular MechanicsThe January/February 2021 issue of Popular Mechanics hit subscriber mailboxes this week with a stark cover image of a single small reactor under the headline, “Tiny nuclear reactors are about to revolutionize American energy.” The story looks at advanced reactors as a pivotal step to “redeem nuclear’s stature in American energy.”A good primer: The article does a good job introducing the casual reader to the idea that “bigger is no longer better” and that the future of nuclear power in the United States will most likely be “a combination of traditional large plants and smaller, safer megawatt reactors.”Advanced reactors, including small modular reactors, show that nuclear is no longer a one-size-fits-all operation, the article notes. The industry now “is all about personalization,” says Ken Canavan, Westinghouse’s chief technical officer, who is quoted in the article. The capacity and scalability of SMRs “is just irreplaceable,” he adds.The article explains that SMRs, microreactors, and other advanced reactor designs will be able to bring reliable, carbon-free power to small or remote locations, replacing fossil fuel power plants and supplementing the “resource-sucking downtimes left by renewables.”Go to Article
Five advanced reactor designs get DOE risk reduction fundingThe Department of Energy today announced $30 million in initial fiscal year 2020 funding—with the expectation of more over the next seven years—for five companies selected for risk reduction for future demonstration projects. The chosen reactor designs from Kairos Power, Westinghouse, BWX Technologies, Holtec, and Southern Company collectively represent a range of coolants, fuel forms, and sizes—from tiny microreactors to a molten salt reactor topping 1,000 MWe. They were selected for cost-shared partnerships under the Office of Nuclear Energy’s Advanced Reactor Demonstration Program (ARDP) through a funding opportunity announcement issued in May 2020.“All of these projects will put the U.S. on an accelerated timeline to domestically and globally deploy advanced nuclear reactors that will enhance safety and be affordable to construct and operate,” said Energy Secretary Dan Brouillette. “Taking leadership in advanced technology is so important to the country’s future, because nuclear energy plays such a key role in our clean energy strategy.”Go to Article
Advanced reactors important for carbon-free power production in U.S., tweets Vice NewsA video posted to Twitter by Vice News discusses the prospect of advanced reactors being an important mix of carbon-free power production in the United States. Hosted by Gelareh Darabi, an award-winning Canadian-British-Iranian journalist and documentary filmmaker, the video provides quick and easy statistics for the general audience and pulls from social media influencer I_sodope. It also includes comments from nuclear experts.Go to Article
U.K. sets plans for clean energy and green jobs by 2050A 170-page energy white paper, Powering Our Net Zero Future, issued by the United Kingdom government on December 14 sets big goals for cleaning up the U.K.’s energy system. According to the U.K. government, the plan would create and support green energy jobs across England, Scotland, Wales and Northern Ireland and would keep electricity bills affordable as the U.K. transitions to net zero emissions by 2050.The white paper notes that the U.K. will generate emission-free electricity by 2050 with a trajectory that will see "overwhelmingly decarbonized power in the 2030s. Low carbon electricity will be a key enabler of our transition to a net zero economy with demand expected to double due to transport and low carbon heat."The white paper builds upon the U.K. prime minister’s 38-page Ten Point Plan for a Green Industrial Revolution, which was issued on November 18.Go to Article
Kairos Power test reactor comes to repurposed Oak Ridge siteAn aerial view of the ETTP site. Photo: Heritage Center, LLCKairos Power plans to site a test reactor it has dubbed Hermes at the East Tennessee Technology Park (ETTP) in Oak Ridge, Tenn. The company has executed a Memorandum of Understanding with Heritage Center, LLC, to acquire the former K-33 gaseous diffusion plant site at ETTP, subject to ongoing due diligence evaluations. The announcement was made today, during the 2020 East Tennessee Economic Council Annual Meeting and Awards Celebration.“We are thrilled at the prospect of coming to East Tennessee,” said Michael Laufer, cofounder and chief executive officer of Kairos Power. “The infrastructure available at ETTP, combined with its proximity to key collaborators at the Oak Ridge National Laboratory, makes this a great location to demonstrate our technology. The successful commissioning of Hermes builds on our current technology development programs and extensive engagement with the U.S. Nuclear Regulatory Commission. Ultimately, Hermes will prove that Kairos Power can deliver real systems at our cost targets to make advanced nuclear a competitive source of clean energy in the United States.”Lou Martinez, vice president of strategy and innovation, added, “Today is an important day for Kairos Power. We are celebrating our 4th anniversary by showcasing an important milestone.”Go to Article
ORNL to examine irradiated accident tolerant fuel assembliesAn accident tolerant fuel experiment developed by Global Nuclear Fuel arrives at Oak Ridge National Laboratory for testing. Photo: ORNLGlobal Nuclear Fuel (GNF) has announced that irradiated lead test assemblies of its IronClad and ARMOR accident tolerant fuel (ATF) have been delivered to Oak Ridge National Laboratory for examination. The unfueled IronClad rods and fueled ARMOR rods, the first ATF samples to be installed in a commercial reactor, completed a 24-month fuel cycle at the Hatch nuclear plant near Baxley, Ga., in February and were shipped to ORNL in early November.The test samples, manufactured at GNF’s facility in Wilmington, N.C., are part of an industry-led effort with the Department of Energy to commercialize new fuels that could help boost the performance and economics of U.S. reactors within the decade. Framatome and Westinghouse are also involved in the DOE’s ATF program.According to GNF’s December 3 announcement, ORNL’s examination of the samples will include visual inspections, microscopy, and measurements of the thickness, corrosion, and other mechanical and material properties of the cladding. These data, GNF said, will be used to determine the performance benefits of the materials and support the licensing of new fuel technologies with the Nuclear Regulatory Commission.The DOE’s Office of Nuclear Energy noted in a December 4 press release that initial visual inspections of the test samples showed no visible signs of flaws or degradation on either of the assemblies.Go to Article