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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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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New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
F. C. Difilippo
Nuclear Science and Engineering | Volume 90 | Number 1 | May 1985 | Pages 13-18
Technical Paper | doi.org/10.13182/NSE85-A17426
Articles are hosted by Taylor and Francis Online.
The forward Kolgomorov equation is written for the case of a subcritical reactor monitored by two detectors and excited by a fission source located inside a fission chamber (an arrangement currently in use to measure reactivities). The marginal distribution of neutrons is shown to be given by the negative binomial distribution with an amplified correlation as compared to the case of a photoneutron source. The amplification allows the definition of an equivalent factor Deq for the Diven factor, which makes possible the application of formulas originally derived for interpretation of noise measurement in the presence of a photoneutron source to the case of a fission source. The ratio of the correlations measured under the successive presence of both kind of sources allows the direct measurement of the effective delayed fraction, βef. The factor Deq is proven to be consistent with a derivation based on the Schottky prescription for the noise source.