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.”
K. Vinjamuri, D. E. Owen
Nuclear Technology | Volume 47 | Number 1 | January 1980 | Pages 119-124
Technical Paper | Fuel | doi.org/10.13182/NT80-A32416
Articles are hosted by Taylor and Francis Online.
Instrumented Fuel Assembly 429, an experimental assembly designed to study helium fill gas absorption and fission gas release in pressurized uranium dioxide (UO2) fuel rods used in light water reactors, is operating in the Halden Heavy Boiling Water Reactor in Halden, Norway. Preliminary assessment of results from fuel rod internal pressure measurements and from the postirradiation examination of selected fuel rods indicates that helium fill gas is absorbed into the UO2 during the first several months of operation. The fuel absorbs ∼5.7 × 10−3 cm3 He (STP)/g UO2 at the irradiation conditions of a 5.4-MPa helium pressure and a peak steady-state fuel temperature of 1500 K. The estimated effective helium diffusion coefficient is ∼1 × 10−8 cm2/s. Periodic transients with power increases of up to 50% do not drive the helium from the UO2 matrix.