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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
W. Y. Kato, D. K. Butler
Nuclear Science and Engineering | Volume 5 | Number 5 | May 1959 | Pages 320-330
Technical Paper | doi.org/10.13182/NSE59-A25604
Articles are hosted by Taylor and Francis Online.
A measurement of the Doppler temperature effect has been made in the fast spectrum of a mockup of the EBR-I reactor in ZPR-III. The effect was measured by thermal cycling samples of enriched uranium, natural uranium, and plutonium and detecting the small changes in reactivity. The pile oscillation technique using a resonant detector was employed to measure the small oscillating component of the neutron flux. An upper limit of 0.5 × 10−8 Δk/ΔT was obtained for a 506-gm sample of U235 in the spectrum of an EBR-I mockup, and for a 235-gm sample of Pu239 in a plutonium-fueled assembly of the same configuration. The results for natural uranium were inconclusive.
