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Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
Masahiro Kinoshita
Fusion Science and Technology | Volume 6 | Number 3 | November 1984 | Pages 574-583
Technical Paper | Tritium System | doi.org/10.13182/FST84-A23139
Articles are hosted by Taylor and Francis Online.
The simulation procedure used in the code, CRYDIS-2, is greatly improved. The previous procedure used the Newton-Raphson method choosing a set of temperatures and liquid flow rates for the independent variables. Considering the property that the convergence characteristics of the liquid flow rates are much less sensitive to the type of the iterative method than those of the temperatures, the iterative loop is divided into two loops — the inner loop of the quasi-Newton method for temperature corrections and the outer loop of the successive iteration for flow rate corrections. The corrections of the deviation coefficients are also made in the outer loop, together with the flow rate corrections, when the nonideality of the hydrogen isotope solution is incorporated in the model. Since the order of the Jacobian matrix is halved, and the numerical evaluation of the Jacobian matrix and its inversion are needed only once, both the computer storage requirements and computation time are remarkably reduced. Thus, a new computer code, CRYDIS-N, which uses an efficient simulation procedure, is developed. Also, a simple but powerful method for estimating the initial set of temperatures is proposed, and it assures rapid achievement of convergence. The simulation procedure is a verison particularly developed for simulating hydrogen isotope distillation columns.