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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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.”
Joonhong Ahn, Myeongguk Cheon, Ehud Greenspan
Nuclear Technology | Volume 158 | Number 3 | June 2007 | Pages 408-430
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT07-A3851
Articles are hosted by Taylor and Francis Online.
We have developed a computation tool, WAste COMposition (WACOM) for performing a scoping study of the effects of the accelerator-driven transmutation of waste (ATW) system with a lead-bismuth-eutectic-cooled transmuter on actinide inventory and radiotoxicity reduction. WACOM consists of a simplified burnup model for a chain of 18 actinide isotopes and a fuel cycle model to evaluate high-level waste (HLW) generation from the reference ATW plant. Interpolation formulas for effective one-group cross sections as a function of the actinide mass fraction have been developed. Three kinds of HLW generation were considered: (a) HLW from uranium separation for light water reactor (LWR) spent fuel, (b) HLW from the partitioning process in multicycle ATW operation, and (c) the last core of the transmuter at the decommissioning of the ATW system. The latter two HLW sources resulting from multicycle ATW operation have been found to be greater than the first source. Potential benefits of ATW deployment have been found to be (a) reduction of the total actinide toxicity by a factor of 48 at the time of waste generation and (b) conversion of the actinide mixture into a more proliferation-resistant configuration, by effective transmutation of 239Pu, 241Am, and 237Np included in the LWR spent fuel. The total actinide radiotoxicity further decreases to 1/260 for the time period of 100 000 yr, which would improve the performance of the Yucca Mountain Repository.