ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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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
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!
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Latest News
IAEA promoting nuclear energy with G20
The International Atomic Energy Agency launched a collaboration with the Group of 20 this week to highlight the key role that nuclear energy can play in achieving energy security and climate-change goals.
The aim of this first-of-its-kind partnership with G20—the world’s largest economic group—is to build momentum for nuclear power. This is the first time the IAEA has presented to G20 on issues relating to nuclear power.
Andrew Greenop, Jae Keun Choi, Bryant Phan, Per F. Peterson (Univ of California, Berkeley)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 825-834
Coiled-Tube Gas Heaters (CTGHs) are shell-and-tube heat exchangers that incorporate small coiled tubes with a gas (supercritical CO2 or air) flowing radially through the tube bundle cooling the liquid inside the tubes. This design reduces the overall volume of the tube bundle while maximizing the heat transfer surface area, improves the effectiveness of the heater, and allows for large pressure differentials between the two heat transfer fluids. CTGHs are optimal for use as the primary heat exchanger in small modular reactors, such as SFRs and FHRs. In a previous paper, a design and optimization code, called THEEM, was developed to model CTGHs using non-dimensional heat transfer and fluid data. In order to experimentally validate this code, the Coiled-tube Air-heater Separate Effects Test (CASET) experiment was built. CASET consists of a single CTGH sub-bundle in an acrylic vessel that uses room temperature air to cool hot water in the bundle. The initial validation experiments indicate that THEEM can accurately predict the temperatures and heat exchanger effectiveness, but the pressure drop calculations may need to be reevaluated. CASET was also used to measure the distribution of the air flowing through the bundle, which could then be used to improve THEEM in the future. Finally, the Wilson plot method was used to develop heat transfer convection correlations for both the shell-side and tube-side fluids, which could have applications to other coiled tube heat exchangers.