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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.
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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.
Trine-Yie Dawn
Nuclear Science and Engineering | Volume 77 | Number 3 | March 1981 | Pages 344-351
Technical Note | doi.org/10.13182/NSE81-A19842
Articles are hosted by Taylor and Francis Online.
The method of D-partitions is introduced to study the stability property of the reactor dynamic equation with six-delay-group representation. Two kinds of feedback models are considered—the delayed and the two-path temperature feedback. The stability region in parameter space, the effect of delayed neutrons, and the unconditional stability of the two-path temperature feedback are discussed in detail. The corresponding results of the one-delay-group model, one-group prompt-jump approximation, and effective lifetime model are also presented for comparing and discussing the validity or accuracy of these simplified kinetic models.
