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
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
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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
Mar 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
April 2024
Nuclear Technology
Fusion Science and Technology
February 2024
Latest News
From South Korea to Belgium: Testing a high-density research reactor fuel
The Korea Atomic Energy Research Institute has developed a high-density uranium silicide fuel designed to replace high-enriched uranium in research reactors. Recent irradiation tests appear to be successful, KAERI reports, which means the fuel could be commercialized to continue a key global nuclear nonproliferation effort—converting research reactors to run on low-enriched uranium fuel.
Yuh Ming Ferng, Yung Shin Tseng, Bau Shei Pei, S. Long Wang, Chunkuan Shih, Tsun Fu Hung
Nuclear Technology | Volume 162 | Number 3 | June 2008 | Pages 308-322
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT08-A3958
Articles are hosted by Taylor and Francis Online.
In this paper, possible influences of power uprate on the distribution characteristics of erosion-corrosion (E/C) wear sites were analyzed through proper two-phase models. These models include three-dimensional two-phase computational fluid dynamics (CFD) simulations and appropriate E/C analysis. An analytical approach was applied to boiling water reactors. Based on the simulation results, the present CFD simulations successfully predicted two-phase phenomena that occurred in the piping system including centrifugal effects, gravitational effects, an imbalance of phase and mass separation in a T-junction, etc. When coupled with the calculated two-phase flow structures, the appropriate E/C models can be used to indicate the local distributions of severe E/C wear sites on the wall of the fittings. This shows a reasonable agreement with the plant-measured results. With these models, the impacts of power uprate on the distribution characteristics of E/C wear sites can be investigated. Comparisons between the calculated results for 100, 105, and 110% power levels clearly reveal that the power uprate has an insignificant effect on the distribution characteristics of wear sites for the selected piping system under investigation, especially in the wear ranges.