ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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!
Latest Magazine Issues
Jul 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
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.”
Mong J. Yu, Chan S. Kim, Kune Y. Suh
Nuclear Technology | Volume 157 | Number 3 | March 2007 | Pages 261-276
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT07-A3817
Articles are hosted by Taylor and Francis Online.
Quenching experiments were performed to examine the effect of inclination angles and curvature on film-boiling heat transfer. The experiments employed a 294-mm-diam, 30-mm-thick stainless steel downward-facing hemisphere to substantiate the local film-boiling mechanism along the angular surface. Forty-six thermocouples were installed from 0 deg (the bottom) to 85 deg (near the equator) at three intervals: 10 deg (0 to 10 deg), 5 deg (10 to 55 deg), and 2.5 deg (55 to 85 deg) near the outer (1.5 mm) and inner (5 mm) surfaces of the test section. The angular film-boiling heat fluxes and heat transfer coefficients were obtained from the two-dimensional transient temperature profiles by solving a transient heat conduction equation in spherical coordinates. The test results were compared with those of the laminar and interfacial wavy film-boiling analysis. Undulating heat transfer coefficients were observed from the experimental data as the angle increases. These phenomena intensified near the equator, which has higher inclination angles than near the bottom. It was shown that the Helmholtz instability limited the vapor film thickness. In addition, the boiling mechanism on the downward-facing hemisphere was visualized utilizing a digital camera.