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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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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Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
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.”
J. T. Hogan, N. A. Uckan
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1504-1508
ITER | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29554
Articles are hosted by Taylor and Francis Online.
The MHD stability limits to the operational space for the International Thermonuclear Experimental Reactor (ITER) have been examined with the PEST ideal stability code. Constraints on ITER operation have been examined for the nominal operating scenarios and for possible design variants. Rather than relying on evaluation of a relatively small number of sample cases, the approach has been to construct an approximation to the overall operational space and to compare this with the observed limits in high-β tokamaks. An extensive database with ∼20,000 stability results has been compiled for use by the ITER design team. Results from these studies show that the design values of the Troyon factor (g ∼ 2.5 for ignition studies and g ∼ 3 for the technology phase), which are based on present experiments, are also expected to be attainable for ITER conditions, for which the configuration and wall-stabilization environment differ from those in present experiments. Strongly peaked pressure profiles lead to degraded high-β performance. Values of g ∼ 4 are found for higher safety factor (qψ ≥ 4) than that of the present design (qψ ∼ 3). Profiles with q(0) < 1 are shown to give g ∼ 2.5, if the current density profile provides optimum shear. The overall operational spaces are presented for g-qψ, qψ-li, q-αp, and li-qψ.