Because of its hardness and its hardiness in the face of high temperatures, silicon carbide has been used for industrial purposes for decades. It has proven its worth as a key component of tiny TRISO fuel particles. But SiC has a weakness—in its pure form it is too brittle for use in structural components, such as 12-foot-long light water reactor fuel cladding tubes.

The Department of Energy released an anticipated request for proposals on June 27 for low-enriched uranium enrichment. “Today’s action will help spur the safe and responsible build-out of uranium enrichment capacity in the United States, promote diversity in the market, and provide a reliable supply of commercial nuclear fuel to support the energy security and resilience of the American people and domestic industries, free from Russian influence,” the DOE declared.

TerraPower announced May 29 that it will work with Framatome North America to fund the high-assay low-enriched uranium (HALEU) metallization pilot plant that Framatome is building at its fuel fabrication facility in Richland, Wash. A successful demonstration of Framatome’s capability of converting enriched uranium oxide to HALEU metal will “support the development of the domestic HALEU supply chain,” both companies say.

Utilities need to know months ahead of a scheduled refueling outage that fresh fuel will be on-site and ready to load. Now that the Prohibiting Russian Uranium Imports Act has been signed into law, U.S. utilities with plans to use Russian-origin low-enriched uranium also need to know if they can secure a waiver for imports through December 31, 2027—subject to specific annual limits—if “no alternative viable source of [LEU] is available to sustain the continued operation of a nuclear reactor or a United States nuclear energy company” or if LEU imports from Russia are “in the national interest.”

On May 13, President Biden signed the Prohibiting Russian Uranium Imports Act, unlocking the $2.72 billion that Congress conditionally appropriated in March to increase production of low-enriched uranium (LEU) and high-assay low-enriched uranium (HALEU).

The United States has an ambitious goal: to establish a high-assay low enriched-uranium advanced nuclear fuel supply chain, revive the once thriving nuclear fuel market for low-enriched uranium in the nation, and “reestablish U.S. leadership in nuclear energy more broadly.” Making a success of that could have impacts beyond the nuclear sector. According to the Department of Energy’s Office of Nuclear Energy, “Expanding domestic LEU and HALEU enrichment production will be essential for fueling the clean energy required to bring down emissions in all sectors of the economy—including in hard-to-abate sectors such as manufacturing and industrial—while delivering high paying jobs to communities across the country.”

Bulgarian officials have approved the transition to Westinghouse fuel at the nation's Kozloduy nuclear power plant, as Bulgaria moves away from its reliance on Russian supplies. The fuel was recently delivered for use in Unit 5.

Clean Core Thorium Energy (Clean Core) has announced that its ANEEL fuel is ready to begin irradiation testing and qualification at Idaho National Laboratory. The fuel, made of thorium and HALEU, was developed by Clean Core for use in pressurized heavy water reactors, including CANDU (Canadian deuterium-uranium) reactors. Irradiation of the fuel samples in INL’s Advanced Test Reactor (ATR) is set to begin this month.

The Korea Atomic Energy Research Institute has developed a high-density uranium silicide fuel designed to replace high-enriched uranium in research reactors. Recent irradiation tests appear to be successful, KAERI reports, which means the fuel could be commercialized to continue a key global nuclear nonproliferation effort—converting research reactors to run on low-enriched uranium fuel.

On March 26, Silex Systems Ltd. announced that Global Laser Enrichment’s test loop pilot demonstration facility and operational safety programs have been reviewed by the Nuclear Regulatory Commission and approved for loading uranium hexafluoride feed material in preparation for the next phase of GLE’s enrichment technology demonstration in the second quarter of 2024.

Lightbridge Corporation announced today that it has reached “a critical milestone” in the development of its extruded solid fuel technology. Coupon samples using an alloy of zirconium and depleted uranium—not the high-assay low-enriched uranium (HALEU) that Lightbridge plans to use to manufacture its fuel for the commercial market—were extruded at Idaho National Laboratory’s Materials and Fuels Complex.

The Department of Energy yesterday announced a draft environmental impact statement (EIS) on HALEU Availability Program plans to purchase high-assay low-enriched uranium under 10-year contracts to seed the development of a sustainable commercial HALEU supply chain.

GE Vernova, which leads Global Nuclear Fuel (GNF) with partner Hitachi, announced February 14 that GNF has received approval from the Nuclear Regulatory Commission to manufacture, ship, and analyze the performance of nuclear fuel enriched with up to 8 percent uranium-235.

Crownhart

“I’ve got nuclear power on the brain this week.” So writes climate and energy reporter Casey Crownhart in a recent edition the Spark, the MIT Technology Review’s climate newsletter. In her article, Crownhart describes how, while she was conducting research on advanced nuclear energy for another article, she “went down some rabbit holes on . . . potential options for future nuclear plants” and has “reached new levels of obsession” about nuclear energy.

Nuclear primer: Crownhart’s article could serve as a primer for both basic nuclear and advanced nuclear technologies. She begins by discussing the “two absolutely essential pieces” of conventional nuclear power plants—namely, the enriched uranium fuel and the pressurized water cooling system—and explains that the cooling system “keeps the whole thing from getting too hot and causing problems.”

The United Kingdom’s Department for Energy Security and Net Zero announced plans on January 7 to invest £300 million (about $383 million) to build a high-assay low-enriched uranium (HALEU) enrichment facility in northwest England. The goal? To “end Russia’s reign as the only commercial producer of HALEU.” Britain is now the first European country to declare that it will begin HALEU enrichment in a bid for supply chain security.

The Department of Energy issued a final request for proposals (RFP) on January 9 for uranium enrichment services to help establish a commercial domestic supply of high-assay low-enriched uranium (HALEU) to fuel a potential fleet of advanced reactors. Without HALEU, advanced reactors will not be able to proceed past the demonstration stage. And given the investments of capital and time required to license and build a nuclear power plant—even a smaller, more efficient advanced reactor—eliminating fuel uncertainty could be what a utility needs to invest in new construction.

Leaders of five nations that collectively represent 50 percent of the world’s uranium conversion and enrichment capacity—the United States, Canada, Japan, France, and the United Kingdom—are making a habit of meeting on the sidelines of global climate talks to pledge their commitment to securing the nuclear fuel supply chain. On December 7 at the Net Zero Nuclear Summit—an event held in Dubai, United Arab Emirates, during the UN Climate Change Conference, or COP28—representatives of those nations announced plans to “mobilize at least $4.2 billion” in government and private investment in enrichment and conversion capacity. The commitment expands on an initial civil nuclear fuel security agreement that the so-called Sapporo 5 reached in April 2023, when they met (as now, on the sidelines) during a G7 Ministers’ Meeting on Climate, Energy, and Environment in Sapporo, Japan.

TerraPower and Uranium Energy announced today that they have signed a memorandum of understanding to “explore the potential supply of uranium” for TerraPower’s demonstration reactor in Kemmerer, Wyo.

Framatome Inc. and Ultra Safe Nuclear Corp. (USNC) signed an agreement on November 28 at the World Nuclear Exhibition in Paris, France, establishing a joint venture to manufacture nuclear fuel for USNC’s gas-cooled microreactor and other advanced reactor designs. Working together, the companies plan to produce commercial quantities of TRISO fuel particles and USNC’s proprietary Fully Ceramic Microencapsulated (FCM) fuel, which contains TRISO fuel particles within a ceramic fuel pellet.

The Department of Energy plans to award one or more contracts to deconvert high-assay low-enriched uranium (HALEU) from its post-enrichment gaseous uranium hexafluoride (UF₆) state to other chemical forms, such as metal or oxide. The DOE’s final request for proposals (RFP) for deconversion services was issued November 28 as one part of the agency’s effort—under the HALEU Availability Program—to establish a reliable domestic supply of advanced reactor fuel. The DOE will store the deconverted material until it is required by a fuel fabricator or other end user.