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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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 Technology
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.”
H. Amano, M. Atarashi, H. Noguchi, S. Yokoyama, Y. Ichimasa, M. Ichimasa
Fusion Science and Technology | Volume 28 | Number 3 | October 1995 | Pages 803-808
Tritium Safety | Proceedings of the Fifth Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 | doi.org/10.13182/FST95-A30503
Articles are hosted by Taylor and Francis Online.
Trace amounts of elemental tritium (HT) were released continuously to the surface atmosphere at a site at Chalk River Laboratories, Canada over the 12-day period 1994 July 27 to August 8. The test area consisted of four agricultural plots, each 5 m square. One plot was left in its natural state, and the other three were cultivated. Cherry tomatoes, radishes and edible Chinese mustard (Komatsuna in Japanese) were grown in the three cultivated fields. After the HT gas reached the surface of the field, some portion of it was converted into the water form (HTO) mainly by microorganisms in the soil. Then, plant absorbs HTO from both soil and air. Photosynthesized organic material in plant contains tritium,also. The main purpose of this research is to analyze the variation with time of tissue free-water tritium (TFWT) and organically bound tritium (OBT) in several plant species during the HT release. The specific activity of HTO in plants increased rapidly after the HT exposure. The HTO concentration in plant leaves almost attained its maximum value in about 10 days, even though there were several precipitation events, which decreased the soil HTO concentration. The specific activity of OBT in plants increased gradually after the start of the exposure. The OBT concentration in plants did not attain steady state over the whole exposure period of 12 days. The OBT/HTO ratio in plants increased gradually during the release. The ratio in Komatsuna leaves changed from 0.06 to 0.24 between 2 and 11 days. The production rates of OBT in plants are fitted to numerical equations.