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.
Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
Materials in Nuclear Energy Systems (MiNES 2023)
December 10–14, 2023
New Orleans, LA|New Orleans Marriott
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
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
Eisenhower’s “Atoms for Peace” at 70
Seventy years ago to the day, President Dwight D. Eisenhower gave his historic address to the United Nations General Assembly in New York City. (See December 2023 Nuclear News's “Leaders” column to read the reflections of Kathryn Huff, the Department of Energy’s assistant secretary for nuclear energy, on the speech’s anniversary.)
Ethan Coffey, Greg Hanson, David Hill, Timothy Jones, Arnold Lumsdaine, Claire Luttrell, Chuck Schaich
Fusion Science and Technology | Volume 72 | Number 3 | October 2017 | Pages 505-509
Technical Note | doi.org/10.1080/15361055.2017.1333857
Articles are hosted by Taylor and Francis Online.
The ITER Electron Cyclotron Heating (ECH) system provides 20 MW of microwave power from 24 gyrotron sources. The power is transmitted through evacuated, corrugated waveguide transmission lines. The aluminum waveguide is cooled by the attachment of water-cooled copper tubes. These are connected through a conductive graphite foil that is used to increase the heat transfer ability between the aluminum and copper. In the regions where the waveguide is joined to a miter bend or to another waveguide section via a coupling, the waveguide cannot be actively cooled due to coupling hardware. Waveguide sections near couplings and miter bends are modeled and subjected to heat loads based on ITER design specifications. The thermal analysis predicts the maximum waveguide temperature in these regions and the amount of axial thermal expansion of the waveguide.
In addition, testing is done to determine the thermal contact conductance (TCC) between copper and aluminum surfaces with and without several candidate thermal contact materials. These results are used in the finite element analysis to model the ability to transfer heat across interfaces. The TCC test results make it clear that there is significant heat transfer between separate components, as the TCC between components is greater than 5 kW/m2K without thermal contact material and greater than 30 kW/m2K when thin graphite foil is used to increase the heat transfer ability. Therefore miter bends and miter bend mirrors are included as necessary in the finite element model.