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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.”
Yue Guan, Fei Li, Mohammad Modarres, David Bessette, Marino Dimarzo
Nuclear Technology | Volume 133 | Number 3 | March 2001 | Pages 269-289
Technical Paper | Reactor Safety | doi.org/10.13182/NT01-A3174
Articles are hosted by Taylor and Francis Online.
This paper presents an application of a thermal-hydraulic and probabilistic assessment (TH-PA) method to the Westinghouse Advanced Passive 600-MW(electric) (AP600) design. The Westinghouse probabilistic risk assessment (PRA) was used for screening probabilistically important scenarios only. Corresponding integrated-behavior-logic diagrams (IBLDs) were constructed, and accident trajectories were developed. Small cold-leg break accidents and direct vessel injection line break accidents were analyzed. Scenarios in which TH phenomena may play a major role, and which have the highest frequency of core uncovery and heatup were identified. Important insights were obtained. Application of this method to the AP600 has shown its value in prioritizing safety issues. Its application to the AP600 has been further ensured by (a) relying on the Westinghouse PRA to model functional/logical relationships of the components/systems, (b) using a peer review approach to validate the most important IBLDs, and (c) comparing accident trajectories with the U.S. Nuclear Regulatory Commission-sponsored AP600 experimental results. While this application has demonstrated effectiveness of the method in accident scenario screening for the AP600, the TH-PA method has broader potential.