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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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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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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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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.”
Gerardo G. Zavala, Terry Kammash
Fusion Science and Technology | Volume 6 | Number 1 | July 1984 | Pages 30-34
Technical Paper | Plasma Engineering | doi.org/10.13182/FST84-A23117
Articles are hosted by Taylor and Francis Online.
High-speed injection of frozen hydrogen isotope pellets is considered by many to be the most effective method of fueling tokamak plasmas. In the plasma environment the pellet disintegration time could be extremely small, placing stringent requirements on the injection speed and the technology of fuel injection. Several models concerning the composition and spatial extent of the ablation cloud surrounding the pellet have been employed, and they have produced widely varying results for the ablation rate. Most, if not all, of these models have relied on spherical geometry to represent the ablation cloud, although in some instances the effects of the magnetic field on the energy flux reaching the pellet have been taken into account and have resulted in an adjustment of the ablation rate by a “flux reduction factor.” The geometric effects on ablation are examined by assuming the ablation surfaces to also be magnetic flux surfaces. Such an assumption is perhaps most natural for nonspherical geometry especially since there is some basis for it in the experimental observations. It is found that such geometric considerations could lead to sizable reductions in the ablation rate. It is also confirmed that the effects of the magnetic field on the ablation rate are not particularly significant.