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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
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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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.”
Holger Seher, Guido Bracke, Gerd Frieling, Ingo Kock (GRS)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 35-40
The TOUGH2 code was modified by GRS with several repository-relevant processes (called TOUGH2-GRS) and used as a code for simulating multi-phase flow in porous media. For code development and quality assurance, an extensive program was implemented to demonstrate the correctness and reliability of TOUGH2-GRS.
The LLW/ILW repository “Endlager für radioaktive Abfälle Morsleben (ERAM)” located in Saxony-Anhalt, Germany, was chosen to evaluate the impact of grid complexity on the results obtained by two-phase flow calculations with TOUGH2-GRS for C-14. Three grids with increasing complexity regarding spatial resolution and including multiple mine levels were generated and compared with single-phase-flow calculations with parameter datasets for ERAM, taken from the application for its decommissioning, which is currently under review.
The discharge of relevant nuclides is in all cases below the discharge modeled by single-phase simulations. The calculated discharge of C-14 depends on the complexity of model grids. The highest release of C-14 was calculated for the grid with medium complexity for a scenario with significant brine entry.
