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
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 Science and Engineering
August 2024
Nuclear Technology
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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.”
Terumitsu Miura, Toru Obara, Hiroshi Sekimoto
Nuclear Technology | Volume 155 | Number 1 | July 2006 | Pages 78-89
Technical Paper | Nuclear Plant Operations and Control | doi.org/10.13182/NT06-A3747
Articles are hosted by Taylor and Francis Online.
Polonium contamination on material surfaces has been considered one of the problems in the use of lead-bismuth eutectic (LBE) as a coolant and/or target in nuclear systems. Neutron-irradiated LBE contains polonium and can contaminate material surfaces of the primary loop in nuclear systems. Some methods for removal of polonium from neutron-irradiated LBE have been investigated. In this paper, the theory and the effectiveness of the baking method for polonium decontamination of a material surface contaminated by neutron-irradiated LBE are described. Theoretical investigation of the baking method was performed using Langmuir's equation. The effectiveness of the baking method was investigated by baking experiments using Type 316 stainless steel plates contaminated by neutron-irradiated LBE. The experimental results indicated that the baking method is effective for polonium decontamination when the baking temperature is more than 500°C in a vacuum condition (0.4 Pa). The effective temperature for polonium decontamination of Type 316 plates differed from that of quartz glass plates previously reported. Comparing the experimental results and calculations of the evaporation rate of polonium compound by Langmuir's equation showed that the difference in effective temperatures was due to the different chemical forms of polonium, i.e., elemental polonium and lead polonide.