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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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Fusion Science and Technology
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.”
Kokooo, I. Murata, D. Nakano, A. Takahashi, F. Maekawa, Y. Jkeda
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 980-984
Neutronics Experiments and Analysis (Poster Session) | doi.org/10.13182/FST98-A11963740
Articles are hosted by Taylor and Francis Online.
Benchmark experiments on vanadium and vanadium alloy with D-T neutrons have been done at two angles, 0 degrees and 24.9 degrees, using the slab geometry and the time-of-flight (TOF) method. Data were collected for neutron energies ranging from 50 keV to 15 MeV. For vanadium, measurements were made for three slab thicknesses, i.e., 50.8 mm, 1524 mm, and 254 mm, whereas for the vanadium alloy, measurements were made only for 101.6-mm thickness. The measured neutron spectra were compared with MCNP-4A calculations using evaluated nuclear data from the JENDL-3.2, JENDL Fusion-File(IENDL-FF), FENDL/E-1.0 and European Fusion File veraon-3(EFF-3) libraries. The calculated data show reasonable agreement with the measurement, however, some differences are worth noting. Calculations for a slab thickness of 50.8 mm over the energy range from 0.05 to 0.1 MeV underestimate the measurements by about 40% at an angle of 24.9 degrees, while calculations for the energy range from 0.1 to 1.0 MeV, overestimate the measurements by about 40% at an angle of 0 degrees. Calculations made using the JENDL-FF library show good agreement with measurements for energies greater than 11 MeV. Calculations made using the FENDL/E-1.0 library give smaller results than any of the other three libraries in the energy range from 5 to 11 MeV.