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.
Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
J W Rogers, D. A. Millsap, Y. D. Harker
Nuclear Technology | Volume 25 | Number 2 | February 1975 | Pages 330-348
Technical Paper | Material Dosimetry | doi.org/10.13182/NT75-A24372
Articles are hosted by Taylor and Francis Online.
The Coupled Fast Reactivity Measurements Facility (CFRMF) is a zoned-core critical assembly with a fast-neutron spectrum zone in the center of an enriched 235 U, water-moderated thermal “driver” zone. The neutron spectrum of the fast zone has a mean energy of ∼0.72 MeV with an energy distribution of interest in fast breeder reactor dosimetry and reaction rate studies. The CFRMF neutron field has become one of the standard spectra for testing fast-neutron reactions in fissile and nonfissile materials in an interlaboratory experimental effort. The CFRMF has found much use as a fast-neutron field for the activation of materials of interest in the fast breeder reactor programs because of its well -studied energy spectrum and spatial gradients, intensity [up to 1011 n/(cm2 sec)], the precise control and reproducibility of intensity and experimental amenabilities. The neutron energy spectrum at the core center has been measured by proton-recoil spectrometry between ∼3.0 keV and ∼2.5 MeV and calculated by resonance absorption, transport theory, and Monte Carlo multigroup techniques from 10 MeV down. Neutron flux distributions in the fast zone have been examined by activation and fission rate measurements which show that gradients do not exceed ∼0.3% in the region where the experiments are located.