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Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
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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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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.”
Hae Yong Jeong, Hee Cheon No
Nuclear Technology | Volume 124 | Number 1 | October 1998 | Pages 52-64
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT98-A2908
Articles are hosted by Taylor and Francis Online.
A few features of the reflood model in RELAP5/MOD3.1 have been modified to improve the unrealistic prediction results of the model. In the new method, the modified Zuber pool boiling critical heat flux correlation is adopted in the range of mass flux G < 150 kg/m2s. The new criterion for reflood drop size, which is characterized by the use of We = 1.5 and a minimum drop size of 0.0007 m for p* 0.025, has been suggested based on some experimental data and the correlation derived through regression analyses of many reflood experiments. To describe the wall-to-vapor heat transfer at low pressure and low flow, the Webb-Chen correlation is utilized. The suggested method has been verified through simulations of the Lehigh University rod bundle reflood tests. A sensitivity study shows that the effect of drag coefficients is dominant in the reflood model. It is proved that current modifications result in much improved quench behavior and accurate wall and vapor temperature predictions when they are compared with those by the frozen version of RELAP5/MOD3.1.