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Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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.
X. Cheng
Nuclear Technology | Volume 154 | Number 1 | April 2006 | Pages 52-68
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT06-A3717
Articles are hosted by Taylor and Francis Online.
In the frame of the European PDS-XADS (Preliminary Design Study-EXperimental Accelerator-Driven System) project, two concepts of a subcritical reactor core cooled by liquid lead-bismuth eutectic (LBE) were proposed. In this paper, the local thermal-hydraulic behavior of both LBE-cooled reactor-core concepts was analyzed. For this purpose, the MATRA subchannel analysis code (Multichannel Analyzer for Steady States and Transients in Rod Arrays) was selected, and modification was made for its applications to XADS conditions. Compared to the small-core concept, the large-core concept has a much lower hydraulic resistance, lower local coolant velocity, and lower temperatures of coolant and fuel pins. This enables the natural convection approach for removing reactor heat and for short-term realization of the core design using available technologies. The fuel assembly of the small-core concept has a tight configuration that leads to a high flow velocity and high pressure drop. The high power density of the small core results in high local temperatures of coolant, cladding, and fuel. Both coolant velocity and cladding temperature are such that special attention has to be paid to avoid corrosion and erosion damage of cladding materials. A parametric study shows that under the parameters considered, the mixing coefficient has the biggest effect on the coolant temperature distribution, whereas the cladding temperature is strongly affected by the selection of heat transfer correlations.