ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Remembering ANS member Gil Brown
Brown
The nuclear community is mourning the loss of Gilbert Brown, who passed away on July 11 at the age of 77 following a battle with cancer.
Brown, an American Nuclear Society Fellow and an ANS member for nearly 50 years, joined the faculty at Lowell Technological Institute—now the University of Massachusetts–Lowell—in 1973 and remained there for the rest of his career. He eventually became director of the UMass Lowell nuclear engineering program. After his retirement, he remained an emeritus professor at the university.
Sukesh Aghara, chair of the Nuclear Engineering Department Heads Organization, noted in an email to NEDHO members and others that “Gil was a relentless advocate for nuclear energy and a deeply respected member of our professional community. He was also a kind and generous friend—and one of the reasons I ended up at UMass Lowell. He served the university with great dedication. . . . Within NEDHO, Gil was a steady presence and served for many years as our treasurer. His contributions to nuclear engineering education and to this community will be dearly missed.”
March 6, 2025|5:00–6:00PM (6:00–7:00PM EST)
Available to All Users
This Educator Training webinar discusses what is either nuclear energy’s greatest weakness or greatest strength: nuclear waste. Chris Perfetti from the University of New Mexico’s Department of Nuclear Engineering will define nuclear waste, explore how much waste we have to dispose of, and review several options for nuclear waste disposal, ranging from the ideal, to the plausible, to the absurd.
Associate Professor, University of New Mexico, Nuclear Engineering Department
Christopher Perfetti is an Associate Professor in the Nuclear Engineering Department at the University of New Mexico. Prior to his appointment at UNM, Chris was an R&D scientist at Oak Ridge National Laboratory, where he served as the Sensitivity and Uncertainty Analysis Method Team Lead for the SCALE Code Package.
Chris received BS and MS degrees in nuclear and radiological engineering from the University of Florida in 2007 and 2008, respectively, and his PhD in nuclear engineering from the University of Michigan in 2012.
His research interests include sensitivity and uncertainty analysis method development, Monte Carlo method development, advanced reactor core design, nuclear criticality safety, radioisotope production, and radiation shielding. Chris has served as the Chair of the American Nuclear Society’s Reactor Physics Division, Chair of the Alpha Nu Sigma National Honor Society, Chair of the Trinity (NM) ANS Local Section, and Chair of the Oak Ridge/Knoxville ANS Local Section.
He currently serves as the Secretary of the ANS Education, Training, and Workforce Development Division, as the Chair of the Adult Education Committee for the National Museum of Nuclear Science and History, and as the General Chair of the upcoming M&C2025 topical meeting. In his free time, Chris enjoys cycling, hiking, and taking his daughters to museums.
Chief Engineer, GE Hitachi Nuclear Energy
Eric Loewen is the Chief Engineer and Manager of the Chief Engineer’s Office at GE Hitachi Nuclear Energy, where he is responsible for leading the office in supporting new product and technology development, managing technical and enterprise risk, and mentoring and developing technical talent.
Eric graduated from Western State College with a BA in chemistry and mathematics, earned a commission in the U.S. Navy, and subsequently attended Navy Nuclear Power School and the Nuclear Prototype.
After his active Navy service, he earned his MS and PhD in Nuclear Engineering and Engineering Physics from the University of Wisconsin-Madison. Eric worked in private industry prior to joining Idaho National Laboratory (INL) as a systems integration manager and interim department manager.
Currently, he is chief consulting engineer at GE Hitachi Nuclear Energy (GEH) in Wilmington, NC, where he leads GEH activities to deploy the sodium-cooled advanced reactor PRISM that can recycle used nuclear fuel from the current fleet of water-cooled reactors, as well as fission and eliminate weapons-grade material.
His US Navy leadership roles included: Naval Prototype Nuclear Reactor School Instructor; B-2 Division Officer, Nuclear Quality Officer, Engineering Officer of the Watch, Surface Warfare Officer of the Deck aboard the USS LONG BEACH (CGN-9); and Commanding Officer of two Naval Reserve maintenance support units. During his career, Eric received many honors and awards including:
