ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
April 2025
Fusion Science and Technology
Latest News
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.”
Douglas R. Smith, Robert W. Albrecht
Nuclear Technology | Volume 79 | Number 1 | October 1987 | Pages 35-50
Technical Paper | Fission Reactor | doi.org/10.13182/NT87-A16003
Articles are hosted by Taylor and Francis Online.
A recent development in passive safety devices for advanced liquid-metal reactors is the installation of manometerlike core assemblies called gas enhancement modules (GEMs). Knowledge of the liquid sodium level within the GEMs is required to monitor GEM operation. A microwave, resonant cavity level measurement technique has been laboratory tested on a scale model of a GEM assembly in a nonsodium environment. The theory behind this method is discussed, and the experimental results are shown to compare well with those predicted by theoretical calculation. The resonant cavity level detector tracked extremely well over the desired 0.1524- to 1.1176-m range of operation and provided accurate, reproducible results well within the desired ±25.4-mm actual level. When tested for vibrational stability, level errors of only 0.254 mm were observed. The effects of material differences between the experimental GEM (copper) and the actual GEM (Type 304 stainless steel) are calculated. The actual GEM will have poorer resolution but still be within ±25.4-mm actual level. Temperature effects are also calculated and produce a 10.5 kHz/°C shift in resonant frequency, which could cause the indicated level to exceed the ±25.4 mm allowed if large (∼149°C) temperature changes occur.
