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Division Spotlight
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.
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.”
Per Lindén, Gudmar Grosshög, Imre Pázsit
Nuclear Technology | Volume 124 | Number 1 | October 1998 | Pages 31-51
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT98-A2907
Articles are hosted by Taylor and Francis Online.
Flow measurements were performed with pulsed-neutron activation (PNA) in a specially designed test loop. A stationary neutron generator was used as a neutron source, and the detection of the induced 16N activity in the flow was performed by two bismuth germanate detectors. Stable flow could be produced in the loop and measured with high precision (~0.5% error) by a scale and a stopwatch method, concurrent with the PNA measurement. A series of measurements have been made by varying the position of the detectors, the flow velocity, etc. The accuracy of the various time-averaging methods that are used in the evaluation of the PNA measurement could be assessed by a comparison with the flow calibration data. In particular, the dependence of the error of the different PNA evaluation methods as functions of detector spacing and flow velocity was determined. The measurements are part of a program that seeks to develop a flowmeter suitable for practical applications, which will include backing up the method with flow calculation and signal-processing methods such as neural networks for off-line calibration of the equipment.