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
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
November 2024
Nuclear Technology
October 2024
Fusion Science and Technology
Latest News
Aalo and Idaho Falls Power reach agreement on potential microreactor siting
Microreactor developer Aalo Atomics municipal electric utility Idaho Falls Power have developed a memorandum of understanding that could lead to the siting of seven sodium-cooled microreactors and a power purchase agreement for Idaho Falls.
J. C. Young, J. M. Neill, P. d’Oultremont, E.L. Slaggie, C. A. Preskitt
Nuclear Science and Engineering | Volume 48 | Number 1 | May 1972 | Pages 45-50
Technical Paper | doi.org/10.13182/NSE72-A22455
Articles are hosted by Taylor and Francis Online.
Neutron spectra have been measured between 50 eV and 8 MeV by the time-of-flight method in the core of a fast subcritical assembly, designated STSF-1A. This core is loaded with plate-type elements consisting of BeO, enriched uranium, and depleted uranium. The measurements were made at the surface of the central BeO plate. Reduction of the data and comparison to transport calculations followed the procedures used for the STSF-2 and STSF-2A assemblies, which were described in detail in a previous paper. The STSF-1A is similar in most significant details to ZPR-3 Assembly 57, built at ANL/Idaho, in which the spectrum was measured with a proton recoil detector, and this similarity permitted a comparison of the time-of-flight and proton-recoil techniques. The two methods have been found to be generally in satisfactory agreement.