American Centrifuge Operating (ACO), a subsidiary of Centrus Energy, has started enriching uranium hexafluoride gas to high-assay low-enriched uranium (HALEU) levels at the Department of Energy’s enrichment facility in Piketon, Ohio, the DOE announced October 11. The HALEU will be used to help fuel the initial cores of two demonstration reactors awarded under DOE’s Advanced Reactor Demonstration Program and will also support fuel qualification and the testing of other new advanced reactor designs.

The Nuclear Regulatory Commission is requesting comments on the regulatory basis for a proposed rule for light water reactor fuel designs featuring high-assay low-enriched uranium (HALEU), including accident tolerant fuel (ATF) designs, and on draft guidance for the environmental evaluation of ATFs containing uranium enriched up to 8 percent U-235. Some of the HALEU feedstock for those LWR fuels and for advanced reactor fuels could be produced within the first Category II fuel facility licensed by the NRC—Centrus Energy’s American Centrifuge Plant in Piketon, Ohio. On September 21, the NRC approved the start of enrichment operations in the plant’s modest 16-machine HALEU demonstration cascade.

From the pages of the September 2023 issue of Nuclear News.

For decades, more energy has meant more fuel: fossil fuels.

But nuclear fuel—unlike coal, oil, or even natural uranium—is a feat of engineering, not a commodity extracted from the earth. Now, “more” means more engineering—to boost uranium density or to close the fuel cycle.

BWX Technologies, Inc. has announced the details of a contract with the Department of Energy’s National Nuclear Security Administration to process thousands of kilograms of government-owned scrap material containing enriched uranium and produce more than two metric tons of high-assay low-enriched uranium (HALEU) in an oxide form at an enrichment level of 19.75 percent U-235. That HALEU oxide could supply a fraction of the 22 metric tons the DOE has estimated will be needed by the mid-2020s to fuel advanced reactor demonstrations and meet existing commitments for research reactor fuel.

Centrus Energy’s HALEU demonstration cascade. (Photo: Centrus Energy)

Centrus Energy announced on September 6 that it is conducting final system tests and expects to begin producing high-assay low-enriched uranium (HALEU) in October from its 16-machine gaseous centrifuge enrichment demonstration cascade at the American Centrifuge Plant in Piketon, Ohio. After achieving initial HALEU production, Centrus has specific goals to meet under contract as the company ramps the demonstration cascade to its target annual production rate of 900 kg per year.

Centrus is required under a cost-share contract with the Department of Energy to produce 20 kg of 19.75 percent–enriched HALEU in uranium hexafluoride (UF₆) form by the end of this year. That contract, announced in November 2022, replaced an earlier contract signed in October 2019 that called for first production of HALEU by June 2022. The current contract calls for production at an annual rate of 900 kg of HALEU UF₆ per year in 2024, with additional options—subject to appropriations—to produce material in future years.

Ken Petersen
president@ans.org

The front end of the fuel cycle is getting a lot of attention lately—and it needs it. The war in Ukraine has disrupted the global supply chain for many products, nuclear fuel being one. Several countries have determined that they no longer want to rely on nuclear fuel from Russia. This can be anything from fabricated fuel including uranium, conversion, and enrichment to just enrichment.

Since the Cold War, Russia has been a major supplier of nuclear fuel to the West. Replacing Russia as the main supplier will take both time and money—a fact that has become even more clear as the small modular reactor community grows, and with it, the demand for high-assay low-enriched uranium (HALEU) for fuel.

The American Nuclear Society has been highlighting the immediacy of the fuel supply problem—which will become a crisis without immediate action—for years. In 2021, ANS wrote to Congress, urging swift action. This year, Nuclear News and ANS’s Nuclear Newswire have run a three-part series by energy writer and consultant Matt Wald on the domestic nuclear fuel shortage. The first article, “On the verge of a crisis: The U.S. nuclear fuel Gordian knot,” was published on Newswire on April 14; the second, “The U.S. nuclear fuel Gordian knot: From global supplier to vulnerable customer,” on May 19. The final piece of the series, “The U.S. nuclear fuel Gordian knot: The uncertain path forward,” was posted on September 1.

The Nuclear Regulatory Commission staff will hold a hybrid public meeting on September 7 to discuss the agency’s licensing and oversight of Centrus/American Centrifuge Operating’s American Centrifuge Plant, in Piketon, Ohio. The discussion will focus primarily on the company’s enrichment of high-assay low-enriched uranium, or HALEU.

In the last few weeks of 2021, when it was clear that the Russian invasion of Ukraine had put this country’s uranium fuel supply in jeopardy, nuclear energy advocates lobbied hard to attach provisions to various pieces of “must-pass” legislation—such as the National Defense Appropriations Act (NDAA), the Ukraine Supplemental Appropriations Act, the Infrastructure Investment and Jobs Act, and the CHIPS and Science Act—to have the government get the ball rolling on new domestic uranium fuel production capacity. Four times they thought they had succeeded, that Congress was going to allocate enough money to start the United States on the road to a secure supply of reactor fuel, including the higher-enriched fuel needed for advanced reactors.

Oklo Inc. and Centrus Energy announced a new memorandum of understanding on August 28 to support the deployment of Oklo’s microreactor design, dubbed Aurora, near the Piketon, Ohio, site where Centrus plans to operate a high-assay, low-enriched uranium (HALEU) enrichment demonstration under contract to the Department of Energy by the end of the year.

Deploying microreactor technology for military applications could have huge impacts on logistics and reliability for the military of the future, and on the commercial use of similar technologies. That’s why the Department of Defense is developing Project Pele—a high-temperature, gas-cooled and TRISO-fueled microreactor, transportable within mobile shipping containers—for testing at Idaho National Laboratory in 2025.

Canadian nuclear tech firm Terrestrial Energy has signed a manufacturing and supply contract with Springfields Fuels Limited—a Britain–based subsidiary of Westinghouse Electric Company—for the design and construction of an Integral Molten Salt Reactor (IMSR) fuel pilot plant.

In an August 3 press release, Terrestrial said that Springfields’ reactor fuel manufacturing facility has extensive existing infrastructure available to support the fuel supply for IMSR development and is scalable to support a fleet of IMSR plants operating in the 2030s. Located near Preston, Lancashire in northwestern England, the Springfields facility is the only site in the United Kingdom for nuclear fuel manufacturing.

Advanced nuclear technology firm TerraPower announced today the selection of four suppliers to support its Natrium reactor demonstration project, in development near a retiring coal plant in Kemmerer, Wyo.

BWX Technologies announced today that it has been selected to supply the nuclear reactor and fuel for the Defense Advanced Research Projects Agency’s Demonstration Rocket for Agile Cislunar Operations (DRACO) program—the goal of which is to demonstrate a nuclear thermal propulsion (NTP) engine in orbit.

Promising a “massive revival of nuclear power,” the U.K. government yesterday officially launched Great British Nuclear—an “arms-length” governmental body established to help ramp up the nation’s nuclear capacity to as much as 24 GW by 2050. Alongside, the U.K. announced a GBN-managed small modular reactor competition.

TerraPower and Centrus Energy Corp. announced on July 17 that they have signed a memorandum of understanding to “significantly expand their collaboration aimed at establishing commercial-scale, domestic production capabilities for high-assay, low-enriched uranium (HALEU)” to supply fuel for TerraPower’s first Natrium reactor. Nearly three years ago, TerraPower first announced plans to work with Centrus to establish commercial-scale HALEU production facilities. The two companies signed a contract in 2021 for services to help expedite the commercialization of enrichment technology at Centrus’s Piketon, Ohio, facility.

Really taking off during the pandemic, ANS’s online event programming remains very strong and continues to be a great resource for the nuclear community. This year alone, ANS has produced 14 different webinars—some of which are only available to members, with most available to the general public.

Ken Petersen
president@ans.org

It is a great time to be American Nuclear Society president. There are very positive articles in Nuclear News and other places on the advances in fusion, nuclear in space, isotopes, and new power plants. It seems that every month the good news keeps building. I am also fortunate to start my presidency after the extraordinary efforts of past presidents Steve Nesbit (2021–2022) and Steven Arndt (2022–2023).

Steve Nesbit created a special committee to make recommendations on the framework of a generic standard for a high-level radioactive waste repository. The excellent work is currently out for review and, once complete, this standard will be a significant step forward for existing and future reactors. When Steven Arndt started as ANS president last year, he said he would prioritize participation and advocacy, and in these regards he has been an outstanding nuclear advocate. He has taken advantage of being able to travel and has attended numerous conferences in person after the past few years of cancelations, postponements, and virtual meetings for ANS and other industry events. At the same time, Arndt has advocated for a Nuclear Worker Certification program. While the program is not yet approved, I believe it is an excellent initiative, particularly now, with so many people coming to the industry who are new to nuclear—and the growing need for more.

Advanced reactors may be key to a clean energy future, but to prove it they’re going to need fuel—and that fuel will be derived from limited uranium resources and managed throughout the nuclear fuel cycle, whether that cycle is open (like the current fuel cycle) or closed (with reprocessing). Six panelists convened on June 12 during the Annual Meeting of the American Nuclear Society for the executive session “Merits and Viability of Advanced Nuclear Fuel Cycles: A Discussion with the National Academies.” They discussed those fuel cycles and the findings of a National Academies of Science, Engineering, and Medicine (NASEM) consensus committee released as a draft report in November 2022 and published earlier this year.

It has been said that the nuclear provisions in the Biden administration’s Inflation Reduction Act are strong enough to be stand-alone bills. The IRA contains various tax incentives for nuclear, to the point where it seems that few in Congress are questioning the importance of nuclear energy to the nation’s power grid and climate goals.

Centrus Energy announced yesterday that it has received Nuclear Regulatory Commission approval to introduce uranium hexafluoride into its 16-machine centrifuge cascade in Piketon, Ohio, following operational readiness reviews by the NRC. Centrus says it “remains on track to begin production of high-assay low-enriched uranium (HALEU) by the end of 2023.” The announcement follows a series of inspections at the American Centrifuge site in April 2023.