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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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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.”
Lee C. Cadwallader, Cory S. Miller, Kathryn A. McCarthy
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 599-603
Safety and Environment (Poster Session) | doi.org/10.13182/FST98-A11963679
Articles are hosted by Taylor and Francis Online.
This paper discusses the possible forms of injury to maintenance personnel that could arise from a cryostat air ingress event. The results of a thermal-hydraulic analysis of several cryostat breach sizes show the time scales for possible injury and the severity of air pressure transients in the rooms near the cryostat. Energy sources were reviewed to identify worker safety concerns in a cryostat vacuum breach event. The room air pressure drop in medium and large breaches is the most important worker safety concern. Standard vacuum safety techniques are reducing time in proximity, maintaining an exclusion area, and employing some form of barrier or shielding between workers and vacuum reservoirs. Other suggested safety techniques discussed here are engineering controls (doors that can be easily opened under differential pressure), and administrative controls (buddy system, evacuation plan). These techniques are easy to implement in early design stages.