Curiosity landed on Mars sporting a radioisotope thermoelectric generator (RTG) in 2012, and a second NASA rover, Perseverance, landed in 2021. Both are still rolling across the red planet in the name of science. Another exploratory craft with a similar plutonium-238–fueled RTG but a very different mission—to fly between multiple test sites on Titan, Saturn’s largest moon—recently got one step closer to deployment.

On April 25, NASA and the Johns Hopkins University Applied Physics Laboratory (APL) announced that the Dragonfly mission to Saturn’s icy moon passed its critical design review. “Passing this mission milestone means that Dragonfly’s mission design, fabrication, integration, and test plans are all approved, and the mission can now turn its attention to the construction of the spacecraft itself,” according to NASA.

The United Kingdom’s Nuclear Decommissioning Authority has announced that it will establish a Plutonium Ceramics Academic Hub with the Universities of Manchester and Sheffield. The announcement follows a decision by the U.K. government in January to immobilize the country’s inventory of civil separated plutonium at the Sellafield nuclear site, mitigating the material’s long-term safety and security risks.

Wright

Chris Wright, president-elect Trump’s pick to lead the U.S. Department of Energy, spent hours today fielding questions from members of the U.S. Senate’s committee on Energy and Natural Resources.

During the hearing, Wright—who’s spent most of his career in fossil fuels—made comments in support of nuclear energy and efforts to expand domestic generation in the near future. Asked what actions he would take as energy secretary to improve the development and deployment of SMRs, Wright said: “It’s a big challenge, and I’m new to government, so I can’t list off the five levers I can pull. But (I’ve been in discussions) about how to make it easier to research, to invest, to build things. The DOE has land at some of its facilities that can be helpful in this regard.”

A plutonium target bombarded with a beam of titanium-50 in Lawrence Berkeley National Laboratory’s 88-Inch Cyclotron for 22 days has yielded two atoms of the superheavy element 116, in a proof of concept that gives Berkeley Lab researchers a path to pursue the heaviest element yet—element 120. The result was announced July 23 at the Nuclear Structure 2024 conference; a paper has been submitted to the journal Physical Review Letters and published on arXiv.

Researchers at the Department of Energy’s Argonne National Laboratory are investigating the details of plutonium chemistry with the goal of aiding the cleanup of the Hanford Site in Washington state. For more than 40 years, reactors located at Hanford produced plutonium for America’s defense program, resulting in millions of gallons of liquid radioactive and chemical waste.

In March 1949—75 years ago this month—the 25-kilowatt reactor known as Clementine reached full power. As an experimental reactor, it had a rather long and successful run. It was the world’s first fast neutron (high-energy) reactor and operated from initial criticality in 1946 to final shutdown in 1952.

U.S. officials have brought charges of nuclear materials trafficking against a Japanese gangster who has been in federal custody since 2022.

In a case filled with international espionage, along with alleged weapons and drug trafficking, Takeshi Ebisawa has been charged with attempting to sell uranium and weapons-grade plutonium. The 60-year-old Japanese national—who is believed to be a leading figure in the Yakuza, the Japanese organized crime syndicate—faces a long list of federal charges that carry sentence of life in prison.

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.

The Department of Energy recently shipped half a kilogram of plutonium oxide pellets from Oak Ridge National Laboratory to Los Alamos National Laboratory, the agency announced July 18, marking the largest such shipment since the DOE restarted domestic plutonium-238 production over a decade ago.

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.

Connecting nuclear engineers and scientists with space exploration missions has been a focus of the American Nuclear Society’s Aerospace Nuclear Science and Technology Division since its creation in 2008. One of the main ways those connections are made is through the Nuclear and Emerging Technologies for Space (NETS) conference, which the division supports in conjunction with the National Aeronautics and Space Administration.

Research into the high-resolution detection of plutonium mixtures by Purdue University professor Rusi Taleyarkhan and his team was featured on the cover of the February issue of the Journal of Analytical Atomic Spectroscopy, published by the British Royal Society of Chemistry.

The published research focuses on novel hybrid mass-alpha spectroscopy technology. Taleyarkhan and his team applied centrifugally tensioned metastable fluid detector sensor technology to the detection of mixtures of plutonium-239/240. This technology can serve as an alternative to conventional alpha radiation spectroscopy sensors and to mass spectroscopy systems, which can take weeks to deploy and are cost-prohibitive, especially when deployed in low-radiation fields for long periods of time.

Truck loaded with nuclear cargo before departing the IAEA’s Nuclear Material Laboratory. (Photo: NNSA).

Plutonium from an International Atomic Energy Agency laboratory in Austria has been removed to the United States, the Department of Energy’s National Nuclear Security Administration announced on March 29.

The plutonium was shipped from the IAEA’s Nuclear Material Laboratory in Seibersdorf, Austria, to Oak Ridge National Laboratory in Tennessee, where it will be used in sealed sources for nonproliferation research and development.

Safeguards: The plutonium included in the shipment represents approximately 15 years of accumulated residue from inspection samples collected in support of the IAEA’s safeguards mission, according to the NNSA. Technical experts from ORNL and Savannah River National Laboratory worked with a team from the IAEA for several years to complete all activities required for the safe and secure transportation of the material to Oak Ridge.

International nuclear safeguards verification relies on a precise count of isotope particles collected on swipes during International Atomic Energy Agency inspections of nuclear facilities and isolated through a series of lengthy chemical separations that can take about 30 days to complete. On October 15, Oak Ridge National Laboratory—a member of the IAEA’s Network of Analytical Laboratories (NWAL)—announced that analytical chemists at the site have developed a faster way to measure isotopic ratios of uranium and plutonium collected on swipes, which could help IAEA analysts detect the presence of undeclared nuclear activities or material.

ANS is celebrating Actinide Days by giving some exceptional radioisotopes the credit they deserve on social media, and today it’s double the fun, with both plutonium-238 and uranium-238 getting a turn in the spotlight. While the actinides may be buried in the bottom row of the periodic table, isotopes of these elements are hard at work in applications in medicine, industry, power, and space. Visit ANS on Facebook, Instagram, and Twitter to join the conversation and speak up for your favorite actinides.

The Defense Nuclear Facility Safety Board, which provides independent federal oversight of Department of Energy weapons facilities, has reported that low-level radioactive and other combustible waste is accumulating in the basement of Los Alamos National Laboratory’s Plutonium Facility (PF-4), and that housekeeping and waste management in the PF-4 basement have been a continuing challenge.

The Department of Energy’s Office of Environmental Management has doubled the number of work shifts for employees in glove box operations at its Savannah River Site in South Carolina. The increased work pace will help the department meet its commitment to South Carolina to remove surplus plutonium from the state, the DOE said.

Final cleanup activities at the Hanford Site’s demolished Plutonium Finishing Plant have resumed following a pause in work prompted by the COVID-19 pandemic, the Department of Energy announced. Crews with the DOE’s Richland Operations Office and site contractor Central Plateau Cleanup Company will remove, package, and dispose of rubble remaining from the demolition of the plant’s plutonium reclamation facility, which was torn down in 2017.

The world’s first atomic bomb test—code-named Trinity and conducted in New Mexico on July 16, 1945—had an unintended outcome that was only recently discovered.

ANS congratulates NASA for the successful landing of Perseverance on Mars. We look forward to watching from afar its exploration of the Red Planet and search for past microbial life. This is a proud moment as well for nuclear science and technology as a multi-mission radioisotope thermoelectric generator will be powering the rover to mission success.