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
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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.
Franco Vittorio Frazzoli, Alberto Magrini
Nuclear Technology | Volume 45 | Number 2 | September 1979 | Pages 177-182
Technical Paper | Instrument | doi.org/10.13182/NT79-A32308
Articles are hosted by Taylor and Francis Online.
A neutron gauge for the accurate determination of high mean void fractions in a water-steam mixture has been designed to operate on the transmission of a thermal-neutron beam obtained with a 252Cf neutron source coupled with a polyethylene howitzer. Calibrations, carried out with a Plexiglas-air combination simulating annular flow and core flow, show that the gauge is characterized by high sensitivity and precision with respect to the other radiation techniques. Taking into account the lack of calibration standards and the wide range of water and steam densities generally involved in heat transfer processes, we developed a mathematical model of the gauge response to obtain adequate performances for practical use. The model, which is valid in principle for any flow regime, is specialized here for annular flow, which is of interest for the foreseen application in heat transfer studies on an out-of-pile test facility.