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
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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Nuclear Science and Engineering
October 2024
Nuclear Technology
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Latest News
PNNL seeks high-energy neutrons from SpaceX launch of Polaris Dawn
When a SpaceX rocket lifted off from Kennedy Space Center on September 10 (see video here), sending a crewed commercial mission into low Earth orbit, an experiment designed by Pacific Northwest National Laboratory was onboard. Several high-purity metal samples will orbit Earth and absorb cosmic radiation for five days—including that from the Van Allen radiation belt—to help the lab answer questions about the radiation environment for manned space missions, according to a news release from PNNL.
R. O. Meyer, C. R. Hann, D. D. Lanning
Nuclear Technology | Volume 27 | Number 3 | November 1975 | Pages 389-393
Technical Paper | Fuel | doi.org/10.13182/NT75-A24312
Articles are hosted by Taylor and Francis Online.
Plutonium segregation during normal operation is not expected in light water reactor (LWR) plutonium recycle fuels, but it could occur if these fuels were operated in a sustained overpower condition. Existing thermal performance and neu-tronic computer codes have been used to compare the effects of postulated segregation with the behavior of homogeneous fuels. Central void formation, which should accompany plutonium segregation, reduces fuel temperatures markedly; but even if a central void is assumed not to form, the fuel’s centerline temperature stored energy, and melting point are not significantly affected by the postulated segregation. It is concluded that plutonium segregation is not an important phenomenon in LWR plutonium recycle fuels.