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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
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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!
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Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
R. B. Perez, R. E. Uhrig
Nuclear Science and Engineering | Volume 17 | Number 1 | September 1963 | Pages 90-100
Technical Paper | doi.org/10.13182/NSE63-A17214
Articles are hosted by Taylor and Francis Online.
Use of a sinusoidally modulated source of neutrons is equivalent to “poisoning” a moderating medium with a 1/v poison. The inverse relaxation length of the neutron wave amplitude and the variation of the phase angle as a function of position are dependent upon the frequency of modulation and the neutron diffusion and thermalization parameters of the media in which the waves are being propagated. The neutron wave technique allows “poisoning” of solid moderators and provides a means of performing poisoning experiments for measuring nuclear properties of solid as well as liquid moderators. It should supplement the recent use of poisoning techniques in an attempt to reconcile discrepancy in the diffusion and thermalization parameters of moderators, as measured by pulsed neutron techniques. The neutron wave technique and the pulsed neutron technique are supplementary from an experimental viewpoint.