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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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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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.”
Yuh-Ming Ferng, Yin-Pang Ma, Kuo-Tong Ma, Nien-Mien Chung
Nuclear Technology | Volume 126 | Number 3 | June 1999 | Pages 319-330
Technical Paper | Materials for Nuclear Systems | doi.org/10.13182/NT99-A2977
Articles are hosted by Taylor and Francis Online.
Flow-assisted corrosion (FAC), an aspect of erosion/corrosion (E/C), is a mechanism of piping degradation that causes a loss of material from the inside of the piping and then thinning of the wall. FAC damage is believed to be accelerated by a single- or two-phase mixture flowing within the piping. A physical model is presented that attempts to predict the distributions of sites of FAC wear within the fitting; this model includes the E/C and the three-dimensional single- or two-phase-flow models. Based on the calculated results, the impact of centrifugal and gravitational forces on liquid droplet behavior can be reasonably simulated. Appropriate indicators derived from the E/C model are used to predict the FAC locations. Compared with the plant measured results, the proposed model can precisely predict the distribution of wear sites. The FAC pattern dominated by the upstream fittings can also be determined. The satisfactory agreement reveals that the indicators provided by the current models can be used to reasonably predict the FAC locations and explain the complicated phenomenon of FAC wear occurring within the fittings.