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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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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.”
R. H. Renshaw, S. Roy
Nuclear Technology | Volume 55 | Number 2 | November 1981 | Pages 371-382
Technical Paper | Materials | doi.org/10.13182/NT55-371
Articles are hosted by Taylor and Francis Online.
Twelve steam generators in three nuclear power plants were damaged during manufacture by postweld stress relief heat treatment. This damage was detected after all were installed, but before any of the plants became operational. The steam generators were rebuilt, in situ, by complete replacement of the internals and tubing. The damage caused by heat treatment consisted of indentation of the tubing by distortion of the tube support plates. The indentations produced points of local high stress in the tubing, causing a potential for stress corrosion cracking. The indentations and the distortion of the support plates also prevented free axial motion of the tubing through the support plates in service, and it is thought that some tubes would have failed in service for this reason. The rebuilding program permitted design changes to accommodate technical information accumulated since the vessels were designed in 1975. These design changes principally were a strengthening of internal structural members to resist seismic forces and fluid forces predicted for pipe breaks, substitution of stainless steel for carbon steel tube support plates, a more elastic U-bend restraint design, increase of some clearances to better tolerate in-service thermal distortion, and a redesigned emergency water injection system to promote thermal syphoning of the reactor coolant under accident conditions. New methods of tube expansion, tube-to-tube-sheet welding, and heat treatment of the tubing were developed to facilitate field installation. The work required 15 months. It was planned and executed so that the delays to the erection programs of the plants were minimized. The final result was a significant improvement in the design of the steam generators, and an accumulation of technology that may be useful if steam generators should require in-service retubing.