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2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
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Investing in what comes next
Hash Hashemian
The 2026 ANS Annual Conference, “Net Out and Power Up,” brought the nuclear community together in Denver at the end of May. Over four days at the Sheraton Denver, we heard from exceptional speakers on the most consequential questions facing our field; how fusion and fission can complement each other, how to meet surging electricity demand, and what it takes to sustain American nuclear leadership. The embedded topicals on nuclear fuels and materials and on fusion energy added real technical depth. It was exactly the kind of gathering that reminds us why this community is so remarkable.
That energy and commitment is precisely what I want to channel as I close out my term as president of the American Nuclear Society. Because sustaining it year after year, conference after conference, requires more than enthusiasm. It requires investment.
David Regnier, Olivier Litaize, Olivier Serot
Nuclear Science and Engineering | Volume 174 | Number 1 | May 2013 | Pages 103-108
Technical Note | doi.org/10.13182/NSE12-12
Articles are hosted by Taylor and Francis Online.
The average total prompt neutron multiplicity [nu with overbar] of 252Cf spontaneous fission is investigated as a function of the total kinetic energy TKE and the mass split of the fragments through the code FIFRELIN. This Monte Carlo device, already described in a previous work, aims at simulating the neutron evaporation from fission fragments. The observables and TKE and the light fragment mass AL are recorded from a sample of 107 fission events. The analyzed results show a value for the inverse of the slope [[partial differential][nu with overbar](TKE)/[partial differential]TKE]-1 equal to -11.0 MeV/n. In addition to this, the average number of neutrons per fission [nu with overbar](TKE, AL) is determined for every possible TKE and AL. For every fragment mass ratio, differences in behavior between [nu with overbar](TKE, AL) versus TKE and [nu with overbar](TKE) with no discrimination made with regard to AL are observed. Those differences are explained by the TKE dependency of fission yield. The approximation consisting of ignoring this TKE dependency of mass yield when calculating the [nu with overbar](TKE) slope is discussed. We estimate that such a calculation could lead to a significant bias on the absolute value of [partial differential][nu with overbar](TKE)/[partial differential]TKE and could explain the discrepancies between calculations found in the literature.
