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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
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Kwang-Yong Kim, Jun-Woo Seo
Nuclear Technology | Volume 149 | Number 1 | January 2005 | Pages 62-70
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT05-A3579
Articles are hosted by Taylor and Francis Online.
In the present work, the shape of a mixing vane in a pressurized water reactor fuel assembly has been optimized numerically using three-dimensional Reynolds-averaged Navier-Stokes analysis of the flow and heat transfer to find the effects of flow characteristics downstream of the mixing vane on heat transfer augmentation and also to optimize the shape of the mixing vane to increase the resistance to departure from nucleate boiling by enhancing the heat transfer without excessive pressure loss. The response surface method is employed as an optimization technique. The objective function is defined as a combination of the heat transfer rate and the inverse of friction loss with weighting factor. The bend angle and base length of the mixing vane are selected as design variables. In most of the numerical experiments, both the heat transfer and friction loss are enhanced as the bend angle and base length increase. The swirl and cross-flow characteristics and thermal-hydraulic performances of different shapes of mixing vane are discussed. From the results, the close relationship between the swirl factor and the heat transfer rate has been found. In the specified ranges of the design variables, the sensitivity of the objective function to the base length is only about one-tenth of the sensitivity to the bend angle. Nine points for numerical experiments were sufficient for construction of a reliable response surface. The optimum shape has been obtained as a function of the weighting factor in the objective function.