ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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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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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.
S. Mostafa Ghiaasiaan
Nuclear Technology | Volume 81 | Number 1 | April 1988 | Pages 28-38
Technical Paper | Fission Reactor | doi.org/10.13182/NT88-A34076
Articles are hosted by Taylor and Francis Online.
A model was developed to simulate thermal-hy-draulic phenomena in the downcomer and lower plenum of a pressurized water reactor during reflooding. The system dynamics were formulated in terms of a set of time-dependent ordinary differential equations that were integrated numerically. A model was developed to simulate the oscillatory flow in the downcomer-lower plenum-core system. A numerical procedure was devised for solving the governing global momentum equation. This procedure is shown to be numerically stable and computationally efficient. The developed model for downcomer and lower plenum was coupled to the core thermal-hydraulic model, and predictions were made for FLECHT-SET experimental data. The results compared well with the experiment.