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.
H. R. von Gunten, R. F. Buchanan, A. Wyttenbach, K. Behringer
Nuclear Science and Engineering | Volume 27 | Number 1 | January 1967 | Pages 85-94
Technical Paper | doi.org/10.13182/NSE67-A18045
Articles are hosted by Taylor and Francis Online.
The fast-fission cross section of 233Pa has been determined for a fission-neutron spectrum originating from a 233U source that was exposed to thermal reactor neutrons. The of was measured by comparing the fission rate of a known quantity of 233Pa to that of a known thorium sample, using back-to-back fission counters. An average above-threshold value of 775 ± 190 mb has been found, based on a fission cross section of 142 mb for 232Th and an assumed threshold of 0.9 MeV for 233Pa. This value is in very good agreement with published estimated values. The characteristics of the fission counter in the presence of the high beta background resulting from 0.3 to 1.8 Ci of 233Pa were investigated and are presented in the paper.
