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
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
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
Jan 2024
Latest Journal Issues
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.”
Arthur E. Ruggles
Nuclear Technology | Volume 164 | Number 3 | December 2008 | Pages 309-319
Technical Paper | Fission Reactors | doi.org/10.13182/NT08-A4029
Articles are hosted by Taylor and Francis Online.
Acoustic oscillations in nuclear steam supplies have caused structural vibration leading to plant modifications in both pressurized water reactor and boiling water reactor (BWR) systems. Power increases (i.e., uprates) in some BWR designs have resulted in acoustic oscillations in the steam supply that have caused fatigue failures in steam dryer assemblies. Standing waves in side branch lines are identified as one important acoustic source for waves in the main lines. The side branch standing waves are driven by vortex shedding across the branch opening. The side branch lines couple acoustically with standing waves in the main line, extending the range of physical behavior beyond that normally considered in the literature. There are many side branches mounted where there is flow in the main steam line, creating multiple acoustic sources, many of nearly the same frequency. These multiple sources cause time variation in the acoustic performance that may extend over many seconds, and these attributes must be considered during data acquisition, component load simulation, and stress simulation. Wet steam sound speed models appropriate to BWR steam supply conditions are also presented.