Nuclear energy was the focus of a recent NPR 1A podcast episode, hosted by journalist Jenn White, who welcomed guests to discuss the role of nuclear energy in the future of the United States. The guests—Joe Dominguez, chief executive officer of Constellation Energy; Samantha Gross, director of the Energy Security and Climate Initiative at the Brookings Institution; and Edwin Lyman, director of Nuclear Power Safety for the Union of Concerned Scientists—participated in the episode, titled “Where Does Nuclear Energy Fit in a Carbon-Free Future?”

Portland, Ore.–based PacifiCorp—owner of the soon-to-be-retired Wyoming coal plant selected in 2021 as the future site of TerraPower’s Natrium reactor demonstration project—has released its 2023 Integrated Resource Plan, which recommends the addition of two more Natrium units to the company’s generation resource mix by 2033.

A tiny 200-kWt reactor the Department of Energy says would be the first critical fast-spectrum circulating fuel reactor and the first fast-spectrum molten salt reactor (MSR) could be built and operated inside the Zero Power Physics Reactor (ZPPR) cell at Idaho National Laboratory’s Materials and Fuels Center (MFC). Details included in the Molten Chloride Reactor Experiment (MCRE) draft environmental assessment (EA)—released on March 16 for two weeks of public comment (later extended to four weeks, through April 14)—covered the potential environmental impacts associated with the development, construction, operation, and decommissioning of MCRE at INL, facilitated by the National Reactor Innovation Center (NRIC).

The Department of Energy’s commitment to breaking down market barriers with initiatives, programs, and access to facilities is making it simpler and more efficient than ever for industry to partner with national laboratories. It is especially timely, as the country continues to face evolving security, economic, and clean energy challenges. Partnering opportunities via the DOE’s Cooperative Research and Development Agreements (CRADAs) and Strategic Partnership Projects (SPPs) are particularly prevalent in the commercial nuclear community and have seen a tremendous amount of funding and support dedicated to advancing the development, demonstration, and deployment of new reactor technologies.

TerraPower, the advanced nuclear company backed by Bill Gates, announced last week that the start date for its Natrium reactor has been pushed back. As Russia is currently the only commercial source of the high-assay low- enriched uranium (HALEU) the plant requires, the company faces a lack of fuel availability. TerraPower originally planned to use Russian fuel to get its demonstration reactor up and running by 2028, but Russia’s invasion of Ukraine has dashed those plans.

Advanced reactors and small modular reactors with strikingly different coolants and sizes offer an array of different benefits, but when it comes to fuel cycle issues, including spent fuel and waste, they have a lot in common with conventional light water reactors. Two reports released within the last week—a National Academies of Sciences, Engineering, and Medicine (NASEM) consensus committee report two years in the making and a Department of Energy study released by Argonne National Laboratory—address the timely topic of advanced reactor fuel cycle issues. While the NASEM committee ventured to define research and infrastructure needs to support the entire nuclear power fuel cycle, inclusive of new technologies, for decades to come, the DOE report compares the front- and back-end fuel cycle metrics of three reactor designs (from NuScale Power, TerraPower, and X-energy) that have been selected for DOE cost-share–funded demonstrations within this decade. Together, these reports provide assurance that the fuel cycle needs of a fleet of new reactors can be met and point to near-term research and planning needs.

Since at least June of last year—when TerraPower and PacifiCorp announced plans to site the Natrium reactor demonstration project at one of Wyoming’s retiring coal plants—the concept of repurposing those plants to host nuclear reactors has been a popular topic of conversation among the energy cognoscenti.

Nuclear technology firm TerraPower and utility partner PacifiCorp have launched a study to evaluate the feasibility of deploying up to five additional Natrium reactor and integrated energy storage systems in the utility’s service territory by 2035, the companies announced yesterday. (PacifiCorp’s business units—Pacific Power and Rocky Mountain Power—serve customers in California, Oregon, and Washington, and in Idaho, Utah, and Wyoming, respectively.)

Global Nuclear Fuel–Americas (GNF-A) and TerraPower announced their plans to build a Natrium fuel fabrication facility next to GNF-A’s existing fuel plant near Wilmington, N.C, on October 21. While more than 50 years of fuel fabrication at the site have supported the boiling water reactor designs of GE (GNF-A’s majority owner) and GE Hitachi Nuclear Energy (GEH), the Natrium Fuel Facility will produce metallic high-assay low-enriched uranium (HALEU) fuel for the sodium fast reactor—Natrium—that TerraPower is developing with GEH.

“The world's largest chloride salt system developed by the nuclear sector” is now ready for operation in TerraPower’s Everett, Wash., laboratories. Southern Company, which is working with TerraPower through its subsidiary Southern Company Services to develop molten chloride reactor technology, announced on October 18 that the Integrated Effects Test (IET) was complete. The multiloop, nonnuclear test infrastructure follows years of separate effects testing using isolated test loops, and it was built to support the operation of the Molten Chloride Reactor Experiment (MCRE) at Idaho National Laboratory that the companies expect will, in turn, support a demonstration-scale Molten Chloride Fast Reactor (MCFR).

The Department of Energy’s management of its commercial-scale reactor demonstration projects has “generally been consistent with requirements to address risk,” according to a Government Accountability Office (GAO) report published recently. The GAO found that the DOE has met existing project management requirements, and that the two offices managing the awards—the Office of Nuclear Energy (NE) and the Office of Clean Energy Demonstrations (OCED)—plan to introduce additional project management tools, such as external independent reviews. The GAO recommended that the DOE adopt those plans as institutional best practices for other large energy projects, and the DOE concurred.

U.S. nuclear technology company TerraPower announced yesterday the close of a $750 million equity raise—one of the largest advanced-nuclear investment drives to date, according to the announcement—with $250 million of that contributed by South Korean firms SK Inc. and SK Innovation.

Both firms are subsidiaries of the Seoul-based conglomerate SK Group, South Korea’s second-largest conglomerate, after Samsung Group.

The Nuclear Innovation Alliance (NIA), a Washington, D.C.–based nonprofit, has released a new report, Advanced Nuclear Reactor Technology: A Company Compendium, along with an update to its Advanced Nuclear Reactor Technology: A Primer, first published last September.

Both reports are meant to serve as resources for investors, reporters, policymakers, regulators, and others wanting to learn more about the different technologies and key players involved in the design, licensing, construction, and operation of advanced nuclear reactors.

New Mexico State University is collaborating with TerraPower, Idaho National Laboratory, and Savannah River National Laboratory on a three-year project to develop a plan to recycle spent nuclear fuel. The project is being funded by an $8.5 million grant from the Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E), under the Optimizing Nuclear Waste and Advanced Reactor Disposal Systems (ONWARDS) program. ONWARDS is designed to increase the use of nuclear power as a reliable, clean energy source, as well to as limit the amount of waste generated by advanced nuclear reactors.

The Gateway for Accelerated Innovation in Nuclear (GAIN) awarded vouchers to Orano Federal Services and TerraPower on June 22, giving them access to specialized facilities and expertise at Department of Energy national laboratories. Orano is partnering with Oak Ridge National Laboratory on a new technical study that updates the physical chemistry limits for the safe transport of uranium hexafluoride (UF₆) gas enriched up to 10 percent in existing shipping containers, and TerraPower is turning to Los Alamos National Laboratory’s neutron testing capabilities to measure the properties of chlorine isotopes and determine how they will behave in the Molten Chloride Reactor Experiment (MCRE).

This past October, the Department of Energy’s Oak Ridge Office of Environmental Management (OREM) and its contractor Isotek successfully completed processing and disposing the low-dose inventory of uranium-233 stored at Oak Ridge National Laboratory (ORNL), ending a two-year effort that has eliminated a portion of the site’s legacy nuclear material and provided rare nuclear isotopes for next-generation cancer treatment research.

The Department of Energy's Advanced Research Projects Agency–Energy (ARPA-E) has awarded a total of $36 million for 11 projects to develop technologies that will limit the amount of waste produced from advanced reactors and will support sustainable domestic fuel stocks. The projects include research into the facilities and systems required to reprocess, recycle, and dispose of spent fuel generated through diverse advanced reactor fuel cycles.

X-energy, developer of the Xe-100 small modular reactor, has delivered the first of four sets of equipment for the Xe-100 reactor protection system (RPS) prototype, marking the latest milestone in the company’s efforts under the Department of Energy’s Advanced Reactor Demonstration Program (ARDP).

Isotek, the Department of Energy contractor responsible for overseeing the inventory of uranium-233 at Oak Ridge National Laboratory and preparing it for removal from the site, said it plans to resume preparations for processing high-dose U-233 in March. The company was forced to suspend its operational readiness review of the Initial Processing Campaign at Oak Ridge in January due to issues related to COVID-19, as well as difficulties operating in colder temperatures.

The American Nuclear Society is urging the Department of Energy to accelerate the development of an availability program for high-assay low-enriched uranium (HALEU).

In a letter sent to the DOE earlier this week, ANS President Steven Nesbit and Executive Director and Chief Executive Officer Craig Piercy state that HALEU availability is critical to the continued development of advanced nuclear technologies.