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
Sep 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
Fusion Science and Technology
August 2025
Latest News
General Atomics marks completion of ITER’s superconducting fusion magnet
General Atomics last week celebrated the completion of the central solenoid modules for the ITER reactor being built in southern France. Designed to demonstrate the scientific and technological feasibility of fusion power, the ITER tokamak will be the world’s largest experimental fusion facility.
R. A. Rydin
Nuclear Science and Engineering | Volume 50 | Number 2 | February 1973 | Pages 147-152
Technical Paper | doi.org/10.13182/NSE73-A23238
Articles are hosted by Taylor and Francis Online.
The stability of a reactor to xenon-induced spatial power oscillations is generally determined using the first harmonic flux mode alone. This assumption has been tested by including the second harmonic mode in the model and allowing cross coupling between modes. It was found that modal interaction effects are only significant for unstable situations, thus verifying that the use of a single flux mode stability criterion is an adequate approximation to the multimode case.
