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Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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 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.”
H. Huang, R. B. Stephens, S. A. Eddinger
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 39-45
Technical Paper | Nineteenth Target Fabrication Meeting | doi.org/10.13182/FST59-39
Articles are hosted by Taylor and Francis Online.
High image resolution ([approximately]1.3 m/pixel) and precision positioning capability make the Xradia X-ray microscopy an attractive platform on which to study X-ray opacity variations. It can complement precision radiography (PR) as an instrument with much higher spatial resolution. PR measures X-ray transmission intensity variations down to 0.01% at 100-m resolution. Since the requirement to differentiate minute lateral variations in X-ray transmission intensity scales inversely with the spatial resolution, an X-ray imaging microscope such as the Xradia MicroXCT can be useful if it measures the transmission intensity variations to <1%. In normal practice, a number of imaging artifacts limit the intensity measurement to only [approximately]2% precision. Such artifacts include the thermal drift and the illumination uniformity of the X-ray source, as well as thickness variations in the scintillator plate and the beryllium X-ray tube window. The conventional flat-fielding technique is not effective against the dynamic interaction between the beryllium window texture and the moving shadow cast by a moving X-ray spot. We have modified the image processing routine so that the lateral variations in the transmitted intensity can be measured to [approximately]0.3% precision on low-Z samples. This technique can be used to record microstructure variations in beryllium samples. Currently, the beryllium microstructures are characterized by ultrasmall angle X-ray scattering on a synchrotron source, which is not commonly accessible, is expensive, and has a long turnaround time. This Xradia-based method has the potential to make it a routine measurement.