A mock-up model at SRNL was used to demonstrate a full-scale jet cleanout system to remove undissolved material from the H Canyon electrolytic dissolver. (Photo: DOE)
A collaboration between Savannah River Nuclear Solutions (SRNS) and Savannah River National Laboratory (SRNL) is making progress toward processing non-aluminum spent nuclear fuel (NASNF) as part of the site’s accelerated basin de-inventory mission. SRNL is the managing and operating contractor at the Department of Energy’s Savannah River Site in South Carolina.
The D Area Groundwater Treatability Study project team assesses artesian flow into injection well at the Savannah River Site. (Photo: SRNS)
Savannah River Nuclear Solutions (SRNS), the management and operations contractor for the Department of Energy’s Savannah River Site, announced that it has injected more than 100 million gallons of clean artesian well water to neutralize shallow groundwater contamination underneath 33 acres of a former coal storage yard and the associated runoff basin at the site in South Carolina. According to Ashley Shull, senior scientist for the project, “100 million gallons is nine times more water than [is] contained in the Georgia Aquarium in Atlanta.”
The MASS-DEF framework with prevention actions and timelines modeled in EMRALD software interacting with force-on-force (FoF) simulation and thermal hydraulics models. The risk-informed modeling in the MASS-DEF framework integrates physical security effectiveness analysis with safety measures, such as time to core damage. (Graphic: INL)
Today’s nuclear power plants are the nation’s largest source of carbon-free energy, but they come with high operating and maintenance costs.
Competition from other sources, especially natural gas, coupled with low electricity prices, has resulted in the closure of some plants in the last decade due to economic reasons.
One way to alleviate these economic pressures is to reduce the cost of operating nuclear power plants, including the costs associated with physical security.
Teams use a 20-ton overhead crane to move the lower reactor vessel of the Oak Ridge Research Reactor into a cask for eventual shipment and disposal. (Photo: DOE)
Matthew Jasica is a member of a small team conducting large-scale experimental testing of reactors and their components at the NSTF. (Photo: Argonne)
A facility at Argonne National Laboratory has been simulating nuclear reactor cooling systems under a wide range of conditions since the 1980s. Its latest task, described by Argonne in an August 13 news release, is testing the performance of passive safety systems for new reactor designs.
Designed as a half-scale model of a real reactor system, Argonne’s Natural Convection Shutdown Heat Removal Test Facility (NSTF) is used for large-scale experimental testing of the performance of passive safety systems, which are designed to remove decay heat using natural forces including gravity and heat convection. Those tests yield benchmarking data qualified to the level of National Quality Assurance-1 (NQA-1) that is shared with vendors and regulators to validate computational models and guide licensing of new reactors and components.
Westinghouse ADOPT fuel pellets. (Photo: Westinghouse)
Westinghouse Electric Company announced Aug. 8 that it has completed the first pressing of ADOPT nuclear fuel pellets at the company’s Springfields Fuel Manufacturing Facility in the United Kingdom. The pellets, which can contain up to 8 percent uranium-235 by weight, are destined for irradiation testing in Southern Nuclear’s Vogtle-2 pressurized water reactor.
A glass test cell that was fabricated to visualize noble gas behavior in a stagnant molten salt column. (Photo: ORNL)
Transparency is one advantage of certain molten salts that could serve as both a coolant and fuel carrier in an advanced reactor. For scientists studying molten salt chemistry and behavior at the laboratory scale, it helps if the test vessel is transparent too. Now, Oak Ridge National Laboratory has created a custom glass test cell with a 1-liter capacity to observe how gases move within a column of molten salt, the Department of Energy announced August 5.
The ALCF AI Testbed includes the AI systems represented in this collage: Cerebras, Graphcore, Groq, and SambaNova. (Image: Argonne National Laboratory)
Generative artificial intelligence paired with advanced diagnostic tools could detect potential problems in nuclear power plants and deliver a straightforward explanation to operators in real time. That’s the premise of research out of the Department of Energy’s Argonne National Laboratory, and just one example of the DOE’s increasing exploration of AI applications in nuclear science and technology research. Training and restraining novel AI systems take expertise and data, and the DOE has access to both. According to a flurry of reports and announcements in recent months, the DOE is setting out its plans to ensure the United States can use AI to its advantage to enhance energy security and national security.
The Atlas railcar carries a simulated shipment of spent nuclear fuel during testing in September 2023. (Photo: DOE)
The Department of Energy has issued a request for information to gather input on its proposed package performance demonstration, which is intended to demonstrate the robustness of spent nuclear fuel transportation casks in hypothetical accident conditions. By simulating severe accident scenarios, the DOE said it intends to show to the public and stakeholders the safety and reliability of transporting SNF by rail, heavy-haul truck, and barge.
Workers begin construction at the Hermes site in Oak Ridge, Tenn. (Photo: Kairos Power)
Earlier today, on a site in Oak Ridge, Tenn., that was formerly home to the K-33 Gaseous Diffusion Plant, Kairos Power marked the start of construction on its low-power demonstration reactor. Named Hermes, the 35-MWt test reactor claims status as the first Gen IV reactor to be approved for construction by the Nuclear Regulatory Commission and the first non–light water reactor to be permitted in the United States in more than 50 years.
Locations of DOE-EM cleanup sites. (Map: GAO)
Despite efforts to increase hiring, the Department of Energy’s Office of Environmental Management continues to be understaffed, according to a recent Government Accountability Office report. The GAO found that, at the end of fiscal year 2023, DOE-EM had 263 vacant positions across its headquarters, cleanup sites, and EM Consolidated Business Center—a vacancy rate of 17 percent. The office is responsible for the cleanup of the environmental legacy waste resulting from decades of nuclear weapons production and government-sponsored nuclear energy research.
Aecon-Wachs workers performed the D&R of equipment and commodities from the plutonium processing facility at SRS. ( Photo: SRS)
A major milestone has been reached in the construction of a plutonium pit production facility at the Savannah River Site, located near Aiken, S.C.
After 18 months of work involving local trade unions, the dismantlement and removal (D&R) of commodities and equipment throughout the Savannah River Plutonium Processing Facility (SRPPF), previously installed by the Mixed Oxide (MOX) project, was completed in June 2024, the Department of Energy reported on July 24.
Engineers in Argonne’s Chemical and Fuel Cycle Technologies Division. (Photo: Argonne National Laboratory)
Oklo Inc. announced that it has completed the first end-to-end demonstration of its advanced fuel recycling process as part of an ongoing $5 million project in collaboration with Argonne and Idaho National Laboratories. Oklo’s goal: scaling up its fuel recycling capabilities to deploy a commercial-scale recycling facility that would increase advanced reactor fuel supplies and enhance fuel cost effectiveness for its planned sodium fast reactors.
INL’s new Bitterroot supercomputer installed in the Collaborative Computing Center. (Photo: INL)
A new supercomputer named Bitterroot started operating in June at Idaho National Laboratory’s Collaborative Computing Center (C3) and is speeding up nuclear energy research by improving access to modeling and simulation tools. Bitterroot arrived at INL in March, and the announced July 15 that the supercomputer was open to users on June 18 after installation and an extensive program of testing.
The Defense Nuclear Facilities Safety Board, which provides safety oversight of Department of Energy sites, is holding a .png)
