ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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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Nuclear Science and Engineering
August 2024
Nuclear Technology
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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.”
Kyoung-Ho Kang, Rae-Joon Park, Sang-Baik Kim, K.Y. Suh, F. B. Cheung, J. L. Rempe
Nuclear Technology | Volume 153 | Number 2 | February 2006 | Pages 208-223
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT06-A3701
Articles are hosted by Taylor and Francis Online.
LAVA-GAP experiments were performed to investigate the thermal and mechanical performance of the in-vessel core catcher, which was proposed to improve in-vessel retention for high-power reactors. In the LAVA-GAP experiments, alumina melt was used as a core material simulant. The hemispherical in-vessel core catcher made of carbon steel was installed inside the lower head vessel maintaining a uniform gap of 10 mm from the inner surface of the lower head vessel. Two types of in-vessel core catchers were used in this study. The first one is a single-layered in-vessel core catcher without an internal coating, and the other one is a two-layered in-vessel core catcher with a 0.5-mm-thick ZrO2 internal coating. LAVA-GAP experimental results indicate that an internally coated in-vessel core catcher has better thermal performance compared with an uncoated in-vessel core catcher. For the precise investigations on the thermal and mechanical response of the in-vessel core catcher, thermal analyses using the LiLAC code and metallurgical inspections were performed. LiLAC calculation results suggest that the coating layer could lessen the thermal attack transferred to the core catcher and result in improving the integrity of the core catcher in the LAVA-GAP experiments. Metallurgical inspection results indicate that the carbon steel showed stable and pure chemical compositions without any oxidation and interaction with the coating layer. In terms of the material aspects, these metallurgical inspection results suggest that the ZrO2 coating performed well.