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
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.
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.”
Fan-Bill Cheung, K. H. Haddad, Y. C. Liu
Nuclear Technology | Volume 126 | Number 3 | June 1999 | Pages 243-264
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT99-A2972
Articles are hosted by Taylor and Francis Online.
A subscale boundary-layer boiling (SBLB) test facility was developed with the aid of a scaling analysis to simulate the phenomena of pool boiling and critical heat flux (CHF) on the external bottom surface of a heated hemispheric vessel. Saturated and subcooled boiling experiments were performed in the SBLB facility to measure the spatial variation of the CHF and observe the underlying mechanisms, including the vapor dynamics and the resulting buoyancy-driven two-phase boundary-layer flow along the downward-facing hemispheric heating surface. Based on the experimental evidence and an advanced hydrodynamic CHF model, a scaling law was established for estimating the local CHF on the vessel outer surface. The scaling law, which compared favorably with the available CHF data obtained for various vessel sizes, was shown to be useful in predicting the local CHF limits on large commercial-size vessels. Additional work, however, is needed to determine the effect of thermal insulation.