ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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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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.”
G. L. Varsamis, D. Steiner, M. J. Embrechts
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1974-1978
Neutronic | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29631
Articles are hosted by Taylor and Francis Online.
This work presents the analysis of neutron streaming through a tungsten-based shield, modelled as a set of interconnecting tungsten plates, cooled by an aqueous lithium salt solution. The plates are connected with right-angle bends, and then merge to a stainless-steel casing. Discrete neutron streaming paths exist through the right-angle connections and through the stainless steel joints. The analysis was performed in one and two dimensions, with discrete ordinates codes, and in three dimensions with a Monte Carlo code. The results indicate clear streaming paths, both behind ducts and also in cases were materials with very different neutron mean free paths are connected. The neutron flux was observed to peak behind the stainless-steel joints, when compared to adjoining tungsten shield sections. Streaming through the right-angle connections between tungsten plates was limited. The discrete ordinate codes (with low order quadrature sets), generally underestimated the neutron streaming. Higher order approximations required extensive computing time approaching that of the Monte Carlo analysis.