PPPL physicist Dan Boyer. (Photo: Amber Boyer/Kiran Sudarsanan)

Researchers at the Department of Energy’s Princeton Plasma Physics Laboratory are using machine learning to predict electron density and pressure profile shapes on the National Spherical Torus Experiment-Upgrade (NSTX-U), the flagship fusion facility at PPPL that is currently under repair.

The hope is that such predictions, generated by artificial neural networks, could improve the ability of NSTX-U researchers to optimize the components of experiments that heat and shape the fusion plasma.

“This is a step toward what we should do to optimize the actuators,” said PPPL physicist Dan Boyer, author of the paper, “Prediction of electron density and pressure profile shapes on NSTX-U using neural networks,” published by Nuclear Fusion, a journal of the International Atomic Energy Agency. “Machine learning can turn historical data into a simple model that we can evaluate quickly enough to make decisions in the control room or even in real time during an experiment.”

Molten salt reactor technology first gained popularity in the 1960s, through the Molten Salt Reactor Experiment program at Oak Ridge National Laboratory. Now, decades later, a technology known as the molten salt nuclear battery (MsNB) is being developed to support the growing need for carbon-free, reliable, independent, and compact sources of small-scale heat and electrical power.

ANS held a panel discussion on Wednesday to look at where the United States energy system is headed in the next 15 years. The webinar, “What will a clean U.S. electric grid look like in 2035?” drew 465 viewers from 25 nations.

A recording of this webinar is archived along with all past ANS webinars on the ANS webinars page.

Manchin

Biden

President Biden struck an infrastructure deal yesterday with a bipartisan group of senators to provide new investments for electric utilities, transportation, broadband, and other projects.

The deal coincided with a Senate Energy and Natural Resources Committee (SENR) hearing yesterday, which examined the infrastructure needs of the U.S. energy sector and considered the legislative proposal released last week by SENR chairman Sen. Joe Manchin (D., W.Va.) . The proposal, labeled a "discussion draft," is currently in play for ongoing bipartisan infrastructure negotiations and includes provisions that would comply with rules on budget reconciliation, including a section that fully funds the Advanced Reactor Demonstration Program and other Energy Act of 2020 programs. Manchin's proposal would also look to create a Department of Energy grant program for at-risk nuclear plants on an as-needed basis.

The U.K. government and EDF have agreed to improved arrangements for the decommissioning of Britain’s seven advanced gas-cooled reactor nuclear power plants, which are due to reach the end of their operational lives this decade.

The Nuclear Innovation Institute (NII) has launched a study on the role of nuclear power in supporting a growing hydrogen economy. The study will be the first of its kind in Canada to evaluate the technical viability and business case for hydrogen production from nuclear power, according to NII, an Ontario, Canada–based nonprofit formed in 2018 to accelerate innovation in the nuclear industry.

The Nuclear Regulatory Commission has dismissed a challenge to the previously approved transfer of the license for the shuttered Three Mile Island-2 power reactor from FirstEnergy to a subsidiary of EnergySolutions for decommissioning. The order by the NRC commissioners denying the motion by Three Mile Island Alert to hold the license transfer in abeyance was issued on June 22.

Noting the challenges Japan will face in managing the nuclear waste that will be generated from decommissioning 79 of its nuclear research and development facilities, the International Atomic Energy Agency is recommending that the country prepare for delays in the development of disposal facilities and provide appropriate waste storage capacity for the interim period.

The recommendation was one of several that a team of IAEA experts provided to the Japan Atomic Energy Agency after reviewing the agency’s 70-year decommissioning program, called the “Back-End Roadmap,” and contained in the report, ARTEMIS Review of JAEA Back-End Roadmap, which was released on June 22,

More than $61 million in funding has been released for advanced nuclear energy technology projects in 30 states and in the U.S. territory of Puerto Rico, the Department of Energy announced on June 22. Of that total, $58 million is going to U.S. universities for nuclear energy research, cross-discipline technology development, and research reactor infrastructure.

Caputo

The Nuclear Regulatory Commission’s Annie Caputo will depart the agency when her term expires at the end of this month, NRC Chairman Christopher Hanson said yesterday. Her departure will leave the five-seat panel with only three commissioners—the minimum number required for it to conduct business—as former chairman Kristine Svinicki resigned in January of this year.

At this writing, Caputo has not announced her post-NRC plans.

Remaining on the commission are two Democrats, Hanson and Jeff Baran, and one Republican, David Wright. President Biden has not named a replacement for either of the vacancies and can choose only one Democrat, since no more than three commissioners can be from the same political party.

The Nuclear Regulatory Commission has launched a special inspection at the Vogtle new-build site to identify the errors that necessitated construction remediation work on Unit 3’s electrical cable raceway system.

Duke Energy has filed a subsequent license renewal (SLR) application with the Nuclear Regulatory Commission for the Oconee nuclear plant reactors, the Charlotte, N.C.–based utility announced on June 21.

Neutron resonance transmission analysis (NRTA) was developed by researchers at Los Alamos National Laboratory to identify unknown materials inside a sealed object using a beam of neutrons from a laboratory-scale apparatus. Recognizing that the potential nuclear security applications of NRTA were limited by the size and location of the apparatus, Areg Danagoulian, an associate professor in the Massachusetts Institute of Technology’s Department of Nuclear Science and Engineering, began about five years ago to consider how NRTA could be made portable to examine materials on location.

Join ANS for the panel discussion, What will a clean U.S. electric grid look like in 2035? at 1:30 p.m. (EDT) on Wednesday. Register now for the free virtual event.

Luria

Gonzalez

Reps. Anthony Gonzalez (R., Ohio) and Elaine Luria (D., Va.) last week introduced the Twenty First Century Nuclear Security Act—legislation the sponsors say would “deploy a whole-of-government effort” to gauge the risk to U.S. national security from a growing Russian and Chinese dominance in the global nuclear energy market and to identify opportunities for the United States to reestablish leadership in that arena.

The measure, according to a June 17 joint press release from the lawmakers, would require federal agencies to submit a report to Congress analyzing the importance of civilian nuclear power agreements and opportunities for advancing U.S. national security interests.

The Nuclear Regulatory Commission recently released its Enforcement Program Annual Report for calendar year 2020, showing a total of 61 escalated enforcement actions taken last year against licensees, non-licensees, and individuals—an increase of 7 percent from CY 2019, but a number that remains below the five-year (2016–2020) average.

A report by the OECD Nuclear Energy Agency proposes a new approach to assessing the financial adequacy for undertaking nuclear decontamination and decommissioning projects and high-level radioactive waste management.

With the world’s aging nuclear power reactors approaching the end of their planned operational lifetimes, the adequacy of funding for decommissioning and waste management increasingly commands the attention of decision makers, the NEA said.

Stover

Mahoney

Rojas

As one of its first duties, the 2021–2022 ANS Board of Directors has appointed three new members. Jessika V. Rojas, John M. Mahoney, and Tracy E. Stover joined four other incoming members on the Board.

The Department of Energy is preparing for an upcoming campaign to dissolve stainless-steel-clad spent nuclear fuel at its Savannah River Site in South Carolina by installing a new dissolver and an additional double-sized tank for storing dissolved material.

ANS lifetime member Nathan H. Hurt recently celebrated his 100th birthday in Lake Havasu City, Ariz. To mark the occasion the city’s mayor, Cal Sheehy, declared June 6 as Nathan H. Hurt Day.