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Division Spotlight
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
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.
Kevin Segard, Richard Brock, Keith Higar (U.S. Fuels, Framatome), Sebastian Kuch (Fuels Germany, Framatome)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 1234-1247
Framatome has recently developed ARITA, a statistical Non-LOCA methodology based on the external coupling of the 3D core simulator ARTEMIS and the system thermal-hydraulics code S-RELAP5. As part of the qualification of the coupled approach used in ARITA, operating plant transients were analyzed. This paper considers one of these transients; a planned Loss of External Load transient performed on a 1300 MWe plant. This transient was initiated at End-of-Cycle conditions while in coastdown. The purpose of the transient was to measure plant responses to a Loss of External Load. An ARTEMIS/S-RELAP5 model was developed to simulate the transient and provide comparison data. Deviations between calculated and measured results are well behaved and show that ARTEMIS/S-RELAP5 provide a good representation of an operating reactor during transient conditions. The observed maximum deviation in the short-term corrected power is less than 1% rated thermal power, the maximum average coolant temperature deviation is less than 1 °C, and primary pressure difference during the initial peak is within 1 bar, while the peak near the end of the transient is within 2 bar. When steam generator level stabilizes, the final measured level is slightly over-predicted by about 3%. ARTEMIS trends well with the fixed incore detectors.
ARITA, ARTEMIS, COBRA-FLX and S-RELAP5 are trademarks or registered trademarks of Framatome in the USA or other countries.