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
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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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Mar 2025
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Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
April 2025
Latest News
Penn State and Westinghouse make eVinci microreactor plan official
Penn State and Westinghouse Electric Company are working together to site a new research reactor on Penn State’s University Park, Pa., campus: Westinghouse’s eVinci, a HALEU TRISO-fueled sodium heat-pipe reactor. Penn State has announced that it submitted a letter of intent to host and operate an eVinci reactor to the Nuclear Regulatory Commission on February 28 and plans to engage with the NRC on specific siting decisions. Penn State already boasts the Breazeale reactor, which began operating in 1955 as the first licensed research reactor at a university in the United States. At 70, the Breazeale reactor is still in operation.
Carl E. Walter
Nuclear Science and Engineering | Volume 6 | Number 4 | October 1959 | Pages 279-283
Technical Paper | doi.org/10.13182/NSE59-A28844
Articles are hosted by Taylor and Francis Online.
In its elevated-temperature critical-assembly experiments, the University of California Radiation Laboratory, Livermore, will utilize stainless-steel-clad fuel elements. The fuel element consists of 0.001- or 0.002-in. thick enriched-uranium foil packaged in a welded 0.002-in. thick type-347 stainless-steel envelope. The design requirements for the fuel elements are stated, as are the considerations which led to the design selected. Beta heat treatment of the uranium was found necessary to provide compatible thermal-expansion characteristics for the two materials in the fuel element.
