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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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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.”
Lothar Wolf, Ashok Rastogi, Dag Wennerberg, Thomas Cron, Edgar Hansjosten
Nuclear Technology | Volume 125 | Number 2 | February 1999 | Pages 136-154
Technical Paper | Reactor Safety | doi.org/10.13182/NT99-A2938
Articles are hosted by Taylor and Francis Online.
The contribution by the Heiss Dampf Reaktor Safety Program, phase III, to the German containment hydrogen research activities were twofold:1. to confirm the findings of the experiments in the Battelle Model Containment (BMC) in volumes of typically ~100 m3 by similar ones at a larger scale with a total volume of 500 m32. to broaden the database for assessing the emerging modeling strategy for larger scales toward more realistic subcompartment sizes.To supplement the results obtained in the BMC in a proper, controlled manner for additional model development and computer code verification, a total of seven experiments was performed, and the following positions for hydrogen ignition were examined:test group E12.1: hydrogen deflagration in a vertically oriented subcompartmenttest group E12.2: ignition close to the venttest group E12.3: accelerated jet ignition in a horizontal direction.The maximum peak pressure occurred for E12.3.3 at 1.8 bars under typical accelerated jet ignition conditions for 12 vol% initial H2 concentration. Because of larger vent openings, maximum peak pressures were generally lower than observed in BMC tests, whereas maximum temperatures were substantially higher, reaching 1000°C and above. A few comparisons between data and code results from CONTAIN, RALOC-HYDCOM, and CONTAIN/BASSIM computations are shown, indicating the need for further improvements.