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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.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
Mario Dalle Donne, Giancarlo Sordon+
Fusion Science and Technology | Volume 17 | Number 4 | July 1990 | Pages 597-635
Technical Paper | Blanket Engineering | doi.org/10.13182/FST90-A29196
Articles are hosted by Taylor and Francis Online.
The design of a fusion reactor blanket based on a bed of lithium-containing ceramic pebbles or a mixture of ceramic and metallic pebbles requires knowledge of the effective thermal conductivity of such beds. Binary mixtures of spheres with the same diameter but different conductivities as well as beds formed by one type of sphere are investigated. The pebbles are made of Al2O3 (diameter = 1, 2, and 4 mm), Li4SiO4 (diameter = 0.5 mm), aluminum (diameter = 2 mm), and steel (diameter = 2 and 4 mm). The experimental apparatus consists of a stainless steel cylinder with a heating rod along the symmetry axis. The pebble bed is contained in the annular space between the two concentric cylinders. Experiments with stagnant and flowing gas are performed. The experimental values of the effective thermal conductivity and the wall heat transfer coefficient are compared with those predicted by correlations available from the literature. On the basis of the present experimental results, modifications of the existing models are suggested.