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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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Latest News
Google announces power purchase agreement with Commonwealth Fusion
In its June 30 announcement of a new deal to purchase 200 MW from Commonwealth Fusion Systems' (CFS) first ARC fusion power plant planned for Virginia, Google called it “the largest direct corporate offtake agreement for fusion energy” ever. While Google made no mention of its plans for the power, its press release noted that clean energy is needed to reduce data center emissions.
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.
