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
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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
Dec 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
January 2026
Nuclear Technology
December 2025
Fusion Science and Technology
November 2025
Latest News
AI at work: Southern Nuclear’s adoption of Copilot agents drives fleet forward
Southern Nuclear is leading the charge in artificial intelligence integration, with employee-developed applications driving efficiencies in maintenance, operations, safety, and performance.
The tools span all roles within the company, with thousands of documented uses throughout the fleet, including improved maintenance efficiency, risk awareness in maintenance activities, and better-informed decision-making. The data-intensive process of preparing for and executing maintenance operations is streamlined by leveraging AI to put the right information at the fingertips for maintenance leaders, planners, schedulers, engineers, and technicians.
M. Goldsmith
Nuclear Science and Engineering | Volume 15 | Number 4 | April 1963 | Pages 382-387
Technical Paper | doi.org/10.13182/NSE63-A26454
Articles are hosted by Taylor and Francis Online.
A few-group method of calculating the epithermal flux in the vicinity of a slab absorber is developed. Non-moderating absorbers are treated in the P-1, P-3, and DP-1 approximations by applying blackness boundary conditions at the slab surfaces. A code which generates these coefficients is described. Comparison with Monte Carlo calculations indicates that six epithermal groups are needed to calculate the absorption rate to within 2% in a highly absorbing (optical depth = 10.6 at 0.025 ev) boron plate. An iterative method of treating moderating absorbers is also developed. Approximately three quarters of the error caused by neglect of moderation is removed after a single iteration.
