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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.”
Bassam I. Shamoun, Michael L. Corradini
Nuclear Technology | Volume 115 | Number 1 | July 1996 | Pages 35-45
Technical Paper | Nuclear Reactor Safety | doi.org/10.13182/NT96-A35273
Articles are hosted by Taylor and Francis Online.
Experimental observation has shown that the assumption of complete fuel fragmentation in a vapor explosion by the shock adiabatic thermodynamic model results in predicting upper bounds for the shock pressure, propagation velocity, and work output. This model has been modified by considering the condition where the assumption of complete fragmentation of the fuel is relaxed. A methodology is adopted using experimental values of the shock pressure and propagation velocity to estimate the initial mixture conditions of the experiment and the mass fraction of the materials participating in the explosion. Analysis of a steady-state subcritical vapor explosion in one dimension has been carried out by applying the conservation laws of mass, momentum, and energy and the appropriate equation of state for a homogeneous mixture of molten tin and water. The KROTOS-21 experiment, conducted at the Joint Research Center at Ispra, Italy, was used as the initial benchmark experiment in this analysis. A quasisteady explosion pressure of ∼3 MPa and a propagation velocity of ∼200 m/s were obtained in this experiment. Using this model, the estimated minimum mass of the fragmented fuel was found to be 0.21 kg (3.2%) of the total mass of the fuel. The predicted work output by this model corresponding to the aforementioned fragmented fuel mass was found to be 9.8 kJ. The estimated initial void fraction of the vapor was found to be 11.5%. In these analyses, a comparison is made of the various possible closure relations applied to the detonation wave theory for a vapor explosion and associated concerns of model stability in the two-phase region.