ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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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!
Latest Magazine Issues
Jul 2024
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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 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. 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.”
B. H. Mills, J. D. Rader, D. L. Sadowski, S. I. Abdel-Khalik, M. Yoda
Fusion Science and Technology | Volume 60 | Number 1 | July 2011 | Pages 190-196
Divertor & High Heat Flux Components | Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1) | doi.org/10.13182/FST11-A12350
Articles are hosted by Taylor and Francis Online.
The addition of fins to the cooled surface of gas-cooled divertor modules has been proposed as a means to enhance their thermal performance, in the HEMP concept, for example. Such fins enhance heat transfer by significantly increasing the surface area over which convection occurs. However, adding fins also increases pressure losses and manufacturing costs and can adversely affect coolant flow over the cooled surface. More importantly, the high heat transfer coefficients expected with helium (He) cooling may significantly lower the fin efficiency, thereby limiting the extent of heat transfer enhancement to values well below the increase in the area ratio. An experimental investigation was undertaken to quantify the extent of heat transfer enhancement and corresponding pressure loss increase associated with the addition of pin fins to the cooled surface of a modular, helium-cooled, finger-type divertor. Four test cases, including configurations similar to the HEMP and HEMJ concepts, were studied. The results show that the addition of fins to helium jet-cooled finger divertors may not provide enough heat transfer enhancement to justify the associated increases in design complexity and pressure loss. Generalized charts for the thermal performance of helium-cooled divertors have been developed; these allow the designers to estimate the maximum allowable heat flux and corresponding pressure drop for a specified set of operating conditions and maximum operating temperature.