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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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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.”
Jorge J. Sanchez, Warren H. Giedt
Fusion Science and Technology | Volume 44 | Number 4 | December 2003 | Pages 811-819
Technical Paper | doi.org/10.13182/FST44-811
Articles are hosted by Taylor and Francis Online.
The effects of natural convection in the tamping gas in a vertical hohlraum on the heat flow from a frozen layer of deuterium and tritium (D-T) on the inner surface of a target capsule is investigated numerically. The energy released from tritium decay within the capsule is transferred through the tamping gas to the cooling rings on each end of the hohlraum. The thickness of the frozen layer must be uniform. This means that the heat flow from it to the capsule must be spherically symmetric and that the temperature of the inner surface of the D-T layer will be uniform and in equilibrium with its vapor. The objective of this study was to determine the combination of boundary conditions and thin films for restricting convection in the tamping gas, which satisfy these requirements. With the capsule mounted between two thin plastic films, clockwise-flow convection cells form in the upper and lower gas regions. When this flow contacts the capsule, the temperature variation along the inner surface of the D-T layer was as great as 3 mK. This was reduced to 180 K by introducing thin films to isolate the capsule from the convection cells. Further reduction of this value to ~50 K was achieved by modifying the boundary conditions.