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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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.”
Yung-Shin Tseng, Chu Ching Hau, Jong-Rong Wang (NTHU), Po-Hsiu Lee, Chih-Tien Liu (Atomic Energy Council), Chunkuan Shih (NTHU)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 580-586
Since the Chloride-Induced Stress Corrosion Cracking (CI-SCC) has been attended in the Chinshan ISFSI project, the details of thermal information and humidity on the Transportable Storage Canister (TSC) becomes the valuable data for investigating the CISCC aging management. This is because that the temperature not only influenced the threshold of deliquescence but affected the growth rate of crack depth. Since the chloride salt only becomes deliquescent in specific situation depending on the site (e.g., the environment temperature and relative humidity) and cask (e.g., loading pattern and thermal load) condition of CSISFSI, which can be further evaluated by an applicable simulated methodology. In this study, a computational fluid dynamics (CFD), FLUENT, was utilized to investigate the temperature and considered the temperature with the relative humidity profile on each height of TSC shell of CSISFSI. A validated high-accuracy 2D model was developed to accelerate the simulation time due to the time scale of CISCC being up to 20 years. The result shows that the relative humidity will reduce as the temperature of TSC increases by decay heat of SNFs. For this reason, the maximum accumulated crack depth of the TSC will not exceed more than 0.36m height with 0.33mm/year, which is the maximum crack growth rate as the most conservative CaCl2 deliquescent threshold was assumed for prediction. Those quantized results not only prove that the re-inspection planning with 10 year period is enough to ensure the integrity of TSC but also provide a basis to reduce about 90% load for CSISFSI re-inspection work.