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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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.
James F. Davis, Richard S. H. Mah, William F. Stevens, Balabhadra Misra, Victor A. Maroni
Nuclear Technology | Volume 46 | Number 1 | November 1979 | Pages 149-158
Technical Paper | ISotopes Separation | doi.org/10.13182/NT79-A32387
Articles are hosted by Taylor and Francis Online.
A control scheme is proposed based on our analysis of the disturbances expected during normal operation of the lead column in the fuel enrichment distillation cascade for a near-term tokamak fusion reactor fuel cycle. The primary objective of this control scheme is to minimize both the time and the amount that the atom percent protium in the bottoms product is above a setpoint level. As a secondary objective, distillate stream flow and composition fluctuations should be minimized to avoid downstream operational and control problems without requiring intermediate storage. A fixed material balance control scheme was found to be satisfactory for meeting the control requirements of this system. Because the concentration of protium in the bottoms product (the controlled variable) was relatively small, the distillate stream composition and the tritium/deuterium ratio in the bottoms stream proved to be essentially independent of the choice of controller parameters. This insensitivity permitted the controller parameters to be chosen solely on the basis of the primary objective and led to a high gain setting and low reset value for the controller. With the provision of a bottoms storage to dampen out the effect of oscillatory response, these controller settings minimized the overshoot and produced an averaged protium concentration in the bottoms very close to the setpoint level