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Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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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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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.”
Takanari Ogata, Takeshi Yokoo
Nuclear Technology | Volume 128 | Number 1 | October 1999 | Pages 113-123
Technical Paper | Materials for Nuclear Systems | doi.org/10.13182/NT99-A3018
Articles are hosted by Taylor and Francis Online.
An irradiation behavior analysis code for metallic fast reactor fuel, ALFUS, has been revised so that it can be applied to stress-strain analysis of U-Pu-Zr ternary fuel pins. The stress-strain calculation in ALFUS is closely coupled with models for slug deformation mechanisms, such as swelling due to accumulation of fission gas bubbles and nongaseous fission products. These models include the key parameters: threshold gas swelling for open pore formation, compressibility of the open pores, and accumulation rate of nongaseous fission products. The parameter values have been determined based on theoretical or experimental considerations. An empirical model has also been introduced into ALFUS to treat the effect of the large radial cracking that is a characteristic phenomenon in the ternary fuel slug. The irradiation behaviors of the ternary fuel pins of various design specifications have been analyzed using ALFUS. The analytical results are in fair agreement with the measured data for fission gas release, slug axial elongation, and cladding deformation. The calculated histories of swelling components can reasonably explain the dependency of measured cladding strain data on burnup and initial fuel smear density. One may conclude that ALFUS is valid for irradiation behavior analysis of the metallic fuel pin and is applicable to a wide range of fuel pin specifications. The methodology developed for ALFUS can be a basis for the design procedure for the metallic fuel pin.