ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
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.
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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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.”
Greg J. Evans, Tutun Nugraha
Nuclear Technology | Volume 140 | Number 3 | December 2002 | Pages 315-327
Technical Paper | Radioisotopes | doi.org/10.13182/NT02-A3342
Articles are hosted by Taylor and Francis Online.
In this study, deposition of I2(g) on stainless steel tubing was investigated. The purpose was to quantify the rate of iodine deposition and desorption, as well as to elucidate the underlying mechanisms. The parameters included I2 gas phase concentration (10-7 to 10-11 M), relative humidity (<25 to 100%), tube surface temperature (23 to 90°C), and steel type (SS-304L and SS-316L). Gaseous I2 was found to deposit through both physical and chemical adsorption with deposition velocities ranging from 5 × 10-3 to 1.0 cm/s. At concentrations below 10-9 M, I2 rapidly deposited and was easily desorbed, consistent with physical adsorption. At concentrations above 10-9 M and low relative humidity (<25%), both adsorption and desorption were slow, consistent with a slow chemisorption process. At high relative humidity (>75%), rapid chemisorption with pitting corrosion occurred. Under some conditions, adsorption became inhibited resulting in an apparent maximum surface loading. At high iodine concentration, high relative humidity, and tube temperatures of 40 or 60°C, no such inhibition occurred, resulting in rapid and continuous iodine adsorption.