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
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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.”
Te-Chuan Wang, Shih-Jen Wang, Jyh-Tong Teng
Nuclear Technology | Volume 156 | Number 2 | November 2006 | Pages 133-139
Technical Paper | Fission Reactors | doi.org/10.13182/NT06-A3779
Articles are hosted by Taylor and Francis Online.
After the Three Mile Island accident, the U.S. Nuclear Regulatory Commission requested that nuclear power plants (NPPs) in the United States provide instruments to record reactor water levels. The instruments will improve reliability in diagnosing the approach of inadequate core cooling. The reactor vessel level indicating system (RVLIS) is a measuring system for determining the water level in the reactor vessel. RVLIS was installed at Maanshan NPP under this requirement. A station blackout (SBO) incident occurred in the Maanshan NPP on March 18, 2001. The SBO incident was simulated with the MELCOR 1.8.5 code. The important parameter, reactor vessel water level, was compared with plant data. The interesting phenomena about RVLIS responses included initial full water level above 100%, reactor pressure vessel (RPV) water shrinkage, and two peaks in upper range train A. The initial full water levels of the upper range were at ~112% because of calibration conditions. The two trains of the upper range dropped at ~1.2 h after SBO because of RPV water saturation. RVLIS upper range train A had two level rises after SBO because of two flows out of the pressurizer into the loop 2 hot leg. The results indicated that MELCOR could reproduce the RVLIS response very well.