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Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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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.”
Rajeev Ranjan, R. K. Singh, S. K. Sikka, Anil Kakodkar
Nuclear Technology | Volume 153 | Number 3 | March 2006 | Pages 341-359
Technical Paper | Reactor Safety | doi.org/10.13182/NT06-A3712
Articles are hosted by Taylor and Francis Online.
This paper highlights a three-dimensional (3-D) transient numerical simulation of the Baneberry event of December 18, 1970, with a 10-kT yield and a 278-m source depth, conducted at the Nevada Test Site. This site has complex geological features with preexisting faults and layered geological strata characterized by a hard Paleozoic layer below the source, and saturated tuff on the west side of the source and clay-rich tuff toward the east side, both overlaid by top alluvial layers. In addition, a layer of 50% montmorillonite is sandwiched between two layers of 20% montmorillonite on the east end. This event is reported to have vented because of fault rupture and shock-wave reflections from a closer hard Paleozoic layer near the source. Here, the shock-induced slip along the preexisting fault plane has an important bearing on the containment efficiency of this event. None of the earlier reported simulation studies address the above slip phenomenon and the influence of variation in geological strata in the presence of the preexisting fault in a 3-D framework for underground nuclear events. The paper describes the capabilities of the SHOCK-3D finite element code for simulating short-time shock-wave propagation, fault rupture leading to sliding along the fault plane, and subsequent crater formation at ground zero with a long-duration transient computation to study the quasi-static behavior of the Baneberry event. Precise modeling schemes of the composite geological strata and fault system demonstrate that a dip-slip mechanism had developed for this event, leading to final venting. The present numerical computation results with SHOCK-3D are in excellent agreement with site observations. In addition, the limitations of earlier reported simulation results from the TENSOR two-dimensional axisymmetric code presented by Terhune et al. have also been overcome.