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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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May 2025
Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Mustafa H. Almadih, T. Almudhhi, S. Ebrahim, A. Howell, G. R. Garrett, S. M. Bajorek, F. B. Cheung
Nuclear Technology | Volume 208 | Number 8 | August 2022 | Pages 1290-1300
Technical Paper | doi.org/10.1080/00295450.2021.2000558
Articles are hosted by Taylor and Francis Online.
In this study, boiling regimes have been identified and analyzed along with the corresponding vapor-liquid interfacial morphologies and heat transfer behaviors during quenching of a heated rod using an acoustic measurement technique. The quenching experiments are performed by using cylindrical test samples that are embedded with thermocouples. The experimental work includes investigating the whole range of pool boiling regimes from film boiling through transition boiling to nucleate boiling using Python’s tools of signal processing. The boiling signals are recorded by a special hydrophone (i.e., the HTI-96-Min Exportable, High Tech, Inc.) to register the different sound waves generated by boiling under the water. This special hydrophone is capable of working in boiling water to record high- and low-frequency signals in subcooled pool boiling. The latter has many applications, such as the operations of advanced nuclear reactors, chemical processing, power generation, etc. In this work, the technique of signal processing is employed to identify the boiling regimes and to seek a new understanding of the boiling dynamics, particularly vapor-liquid interfacial morphologies, by applying a new tool for signal processing. Physically, each boiling regime should have a characteristic dominant acoustic signal that can be identified. By correlating the acoustic signatures with the boiling heat fluxes in various regimes, the minimum and maximum heat fluxes measured during the quenching of the cylindrical samples can be identified from the recorded acoustic signals during subcooled pool boiling.