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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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.”
Silva Kalcheva, Edgar Koonen, Pol Gubel
Nuclear Technology | Volume 158 | Number 1 | April 2007 | Pages 36-55
Technical Paper | Best Estimate Methods | doi.org/10.13182/NT07-A3823
Articles are hosted by Taylor and Francis Online.
The subject of this paper is estimation of the maximum values of the heat flux at steady-state nominal operating conditions in the Belgian Material Test Reactor (BR2) at SCK-CEN in Mol. A strong variation of the fuel depletion and the heat flux with the azimuthal direction and dependence on the orientation of the fuel element in the core are obtained. The full-scale three-dimensional (3-D) MCNP&ORIGEN-S heterogeneous geometry model of BR2 with a detailed 3-D isotopic fuel depletion profile, including a detailed azimuthal fuel modeling in the annular concentric plate fuel elements, is used to evaluate the variation of the heat flux with the azimuthal direction in the hot plane. The relative azimuthal power distribution is calculated with MCNP and introduced into ORIGEN-S to evaluate the azimuthal isotopic fuel profile. The applied detailed azimuthal fuel modeling is compared with homogeneous fuel depletion in the hot plane. An increase of the maximum value of the heat flux of 5% for low burnt fuel and 20% for highly burnt fuel due to the azimuthal modeling of the fuel depletion is obtained. A strong variation of the heat flux with the orientation of the fuel element in the core, modeled with the azimuthal fuel profile, is observed. Perturbation effects in the maximum value of the heat flux of 10% for low burnt fuel and up to 40% for highly burnt fuel, correlated to different orientations of the fuel element in the core, are obtained.