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Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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General Kenneth Nichols and the Manhattan Project
Nichols
The Oak Ridger has published the latest in a series of articles about General Kenneth D. Nichols, the Manhattan Project, and the 1954 Atomic Energy Act. The series has been produced by Nichols’ grandniece Barbara Rogers Scollin and Oak Ridge (Tenn.) city historian David Ray Smith. Gen. Nichols (1907–2000) was the district engineer for the Manhattan Engineer District during the Manhattan Project.
As Smith and Scollin explain, Nichols “had supervision of the research and development connected with, and the design, construction, and operation of, all plants required to produce plutonium-239 and uranium-235, including the construction of the towns of Oak Ridge, Tennessee, and Richland, Washington. The responsibility of his position was massive as he oversaw a workforce of both military and civilian personnel of approximately 125,000; his Oak Ridge office became the center of the wartime atomic energy’s activities.”
Seon Jeong Huh (Kookmin Uniy), Joo Hyung Moon, Youngmin Bae, Young In Kim (KAERI), Hee Joon Lee (Kookmin Univ)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 844-848
Local condensation heat transfer coefficient inside a circular vertical tube was experimentally measured for the design purpose of an air-cooled shell and tube heat exchanger in long term passive cooling system. An experiment was conducted in a 1/2500-volume scaleddown model of the emergency cooldown tank (ECT) of the system integrated modular advanced reactor (SMART). While saturated vapor downstream (Ref < 30) flows in the shell side, air natural upstream flows in the tube side. The inner diameter and length of the tube were 261.4 mm and 1.8 m. The outer diameter of the shell was 318.5 mm. Eleven thermocouples were installed at 150 mm apart alongside the outer wall of SUS plate, a thickness of 3 mm, between vapor and air streams. During a performance evaluation of the shell and tube heat exchanger, the heat loss from the emergency cooldown tank was approximately 30% of the total heat load from 1.2 to 1.4 kW. Local condensation heat transfer coefficients were reduced by the Nusselt equation with ranging the quality from 1 to 0. With the range of mass flux from 0.1 to 0.2 kg/m2/s, condensation heat transfer coefficients were distributed at 110 ~ 350 W/m2/K. The experimental data was compared to the existing condensation heat transfer correlations. Among those, Shah correlation gave the best prediction of current experimental data with 54% average error. To increase the accuracy, new correlation is proposed based on the Dittus-Boelter equation and local quality in this study. New proposed correlation predicts current experimental data with 10% average error.