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
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!
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.”
Yu Tang, Christopher Grandy, Ralph Seidensticker
Nuclear Technology | Volume 173 | Number 2 | February 2011 | Pages 135-152
Technical Paper | Fission Reactors | doi.org/10.13182/NT11-A11543
Articles are hosted by Taylor and Francis Online.
We present the results of a survey of the state of seismic isolation technology. The emphasis of the review is placed in the United States. The purpose of this survey was to provide an engineering basis for the use of seismic isolation in the design of nuclear power plants. In particular, the survey is focused on providing a basis for the design of advanced fast reactor (AFR) nuclear power plants. These AFR plants typically have components and piping that are thin walled as opposed to the thick-walled components and piping in light water reactor (LWR) plants. As a result the AFR plants do not have the adequate inherent strength to resist seismic loads that exists in the LWR plants. It is far more desirable, therefore, to reduce the seismic demand on the AFR plants than to require costly measures to strengthen the structures and components. It is believed that the use of seismic isolation is a viable and effective way to provide this reduction in seismic demand. Various types of seismic isolation systems and devices are reviewed along with their strengths and weaknesses. Descriptions of several U.S. seismically isolated buildings are presented. The results of actual performance of seismically isolated buildings are also presented, including representative measurements of accelerations in the structures when subjected to actual seismic events. It is concluded that the seismic isolation technology is well established and that the path forward leading to the use of this technology for AFR nuclear power plants is clear and achievable.