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
Joint NEA project performs high-burnup test
An article in the OECD Nuclear Energy Agency’s July news bulletin noted that a first test has been completed for the High Burnup Experiments in Reactivity Initiated Accident (HERA) project. The project aim is to understand the performance of light water reactor fuel at high burnup under reactivity-initiated accidents (RIA).
Edward W. Larsen
Nuclear Science and Engineering | Volume 156 | Number 1 | May 2007 | Pages 68-73
Technical Paper | doi.org/10.13182/NSE07-A2685
Articles are hosted by Taylor and Francis Online.
We show that three-dimensional (3-D) particle transport (or diffusion) problems having helical symmetry can be described by a transport (or diffusion) equation possessing only two independent spatial variables. The new two-dimensional (2-D) equations are closely related to the 2-D (r,) equations. These results will provide (a) more efficient computer simulations of 3-D transport and diffusion problems with helical symmetry, and (b) a useful technique for validating 3-D transport and diffusion codes.