The American Nuclear Society and the Nuclear Energy Institute have organized a workshop for industry partners to discuss standards needs to support advanced reactors. The workshop will be conducted virtually through the Zoom platform

The workshop will be held on Tuesday, June 23, from 10:00 a.m. to 4:30 p.m. (EDT).

Artist’s conception of Oklo’s Aurora. (Image: Gensler)

Oklo's 1.5-MWe fast spectrum design known as Aurora is the first advanced non–light-water reactor to be accepted for a licensing review by the Nuclear Regulatory Commission. Both the reactor’s design and the anticipated licensing process mark a major departure from large light-water reactor design and licensing.

The final plenary session of the American Nuclear Society's 2020 Virtual Annual Meeting was the General Chair’s Special Session, held on Wednesday, June 10. The session contained much information about the current and future role of advanced reactor technology. The session, with the subtitle “The Promise of Advanced Reactors during Uncertain Times: National Security, Jobs and Clean Energy,” featured two panels: the Lab Directors Roundtable and the Advanced Reactor Panel. The general chair is Mark Peters, Idaho National Laboratory director. The session was moderated by Corey McDaniel, of Idaho National Laboratory, and the assistant general chair of the Annual Meeting.

A few of the issues covered during the dual plenary session included challenges to advanced reactor deployment, public-private partnerships in research and development, nuclear non-proliferation and security, workforce issues, and market conditions and demand.

The Nuclear Regulatory Commission is taking comments on its “Proposed Rule for Emergency Preparedness for Small Modular Reactors and Other New Technologies,” published in the Federal Register on May 12. The proposed rule and associated draft regulatory guide apply to non–light-water reactors and certain nonpower facilities.

The Department of Energy is awarding $27 million in funding for nine projects through the Advanced Research Projects Agency–Energy’s (ARPA-E) Generating Electricity Managed by Intelligent Nuclear Assets (GEMINA) program. These projects will work to develop digital twin technology to reduce operations and maintenance (O&M) costs in the next generation of nuclear power plants in order to make them more economical, flexible, and efficient, according to the DOE.

A bipartisan group of senators is calling on the Nuclear Regulatory Commission to accelerate the completion of a rulemaking that would establish a technology-inclusive regulatory framework for advanced nuclear reactor technologies.

In a May 15 letter to NRC Chairman Kristine Svinicki, Sens. John Barrasso (R., Wyo.), chairman of the Senate Committee on Environment and Public Works, Sheldon Whitehouse (D., R.I.), Mike Crapo (R., Idaho), and Cory Booker (D., N.J.) note that the Nuclear Energy Innovation and Modernization Act (NEIMA)—signed into law by President Trump in January 2019—requires the NRC to, among other things, complete a rulemaking to license and regulate these technologies no later than December 31, 2027.

Reactor designers and others ready to invest in advanced nuclear technology now have a defined route to apply for cost-share funding, including $160 million in initial funding to build two reactors within the next five to seven years. On May 14, the U.S. Department of Energy issued a funding opportunity announcement (FOA) for the new Advanced Reactor Demonstration Program (ARDP).

Today, the U.S. Department of Energy announced the launch of the Advanced Reactor Demonstration Program (ARDP) within the Office of Nuclear Energy. ARDP is designed to help domestic private industry demonstrate advanced nuclear reactors in the U.S.

The Nuclear Regulatory Commission is developing a generic environmental impact statement (GEIS) for small-scale advanced reactor designs. Just how small a reactor must be to fit the parameters of the GEIS is one topic open for public comment, but the NRC staff anticipates including reactors generating up to 30 MWt. The public comment period is open until June 30

When it comes to advanced, high-temperature reactors—using working fluids such as molten salt, high-temperature gases, or sodium—there simply are not many qualified materials for nuclear component construction. Alloy 617 is not a new material, but it made the news after Idaho National Laboratory announced that it was recently added to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code for high-temperature nuclear applications, bringing the total number of qualified high-temperature materials to six.

High-assay low-enriched uranium (HALEU) is the fuel of choice for many advanced reactor developers, including Advanced Reactor Concepts, which is designing the ARC-100, a sodium-cooled fast reactor. Developers face a potential supply problem, however: The United States has no clear path to build the commercial HALEU production facilities that would be needed to fuel a fleet of advanced reactors. A letter of intent signed by ARC and Centrus Energy, announced on April 28, calls for cooperation on the deployment of a commercial supply of HALEU and could lead to a HALEU purchase agreement for ARC-100 deployments in the late 2020s.

The Department of Energy announced on April 28 that the Southern Ohio Diversification Initiative (SODI) and the Southern Nuclear Development LLC (SND) would receive funding for their advanced nuclear technology development projects. The two awards—one to support site preparation for a future domestic advanced reactor demonstration project and the other for an advanced reactor regulatory licensing grant—have a total value of $5.4 million.

Battelle Energy Alliance, the managing and operating contractor for Idaho National Laboratory, is seeking an expression of interest (EOI) from industry stakeholders interested in forming a partnership to develop and/or demonstrate advanced construction technologies and processes. The effort would be executed as an initiative of the National Reactor Innovation Center (NRIC) at INL. Battelle announced the EOI on April 17, with a deadline for responses of May 16.

The University of Tennessee (UT) and the Tennessee Valley Authority (TVA) signed a memorandum of understanding on April 7 to evaluate the development of a new generation of cost-effective advanced nuclear reactors, such as small modular reactors (SMR), at TVA’s 935-acre Clinch River Nuclear Site in Roane County, Tenn.

The TCR program is leveraging an agile approach—one that is centered around continuously informing the process—to accelerate deployment timelines and introduce performance improvements. Image: Adam Malin, ORNL

Soon after Enrico Fermi’s Chicago Pile-­1 went critical for a brief duration in December 1942, the construction of the first continuously operating reactor, the X-­10 Graphite Reactor, was initiated in February 1943 at Clinton Engineer Works in Oak Ridge, Tenn. On November 4 of that year, a mere nine months after the start of construction, the reactor began operation. This marked the onset of what Alvin M. Weinberg referred to as “the first nuclear era,” during which many reactors of various designs and operating parameters were built and demonstrated across the United States. Forty years ago, the Fast Flux Test Facility was the last U.S. non-­light-­water reactor to reach criticality, and it has since been decommissioned.

On February 27, Sens. Lisa Murkowski (R., Alaska) and Joe Manchin (D., W.Va.) introduced the American Energy Innovation Act (AEIA), a 555-­page piece of policy legislation that incorporates over 50 energy-­related bills considered and individually reported by the Senate Energy and Natural Resources Committee last year—measures sponsored or cosponsored by more than 60 senators from both sides of the aisle.

This week I had some considerable interaction on social media in the area of replacing fossil power at existing sites with micro reactors or SMR’s (Small Modular Reactors.) As we see real progress happening now in these exciting reactor fields (NuScale and Oklo come to mind first, but there are others!) I’d like to share five things to think about as we begin to seriously consider replacing fossil power (coal, oil) at particular sites with nuclear.

Advanced reactor cores are being designed for higher efficiencies and longer lifetimes, but to get there, they need high-assay low-enriched uranium (HALEU).

Enriched to between 5 and 19.75 percent fissile U-235, HALEU is packed with nuclear potential. It can be used as a feedstock for the demonstration of new fuel designs, from uranium alloys to ceramic pellets and liquid fuels. Those fuels can enable advanced reactor and microreactor demonstrations. Operating light-water reactors could potentially transition to HALEU uranium oxide fuels for extended operating cycles and improved plant economics.