New prompt fission gamma-ray spectral data from 239Pu(nth, f) in response to a high priority request from OECD Nuclear Energy Agency

Angélique Gatera, Tamás Belgya, Wouter Geerts, Alf Göök, Franz Josef Hambsch, Matthieu Lebois, Boglárka Maróti, Stephan Oberstedt, Andreas Oberstedt, Frederik Postelt, Liqiang Qi, Laszló Szentmiklósi, Marzio Vidali, Fabio Zeiser

Research output: Conference contribution

Abstract

Benchmark reactor calculations have revealed an underestimation of γ-heat following fission of up to 28%. To improve the modelling of new nuclear reactors, the OECD/NEA initiated a nuclear data High Priority Request List (HPRL) entry for the major isotopes (235U, 239Pu). In response to that HPRL entry, we executed a dedicated measurement program on prompt fission γ-rays employing state-of-the-art lanthanum bromide (LaBr3) detectors with superior timing and good energy resolution. Our new results from 252Cf(sf), 235U(nth,f) and 241Pu(nth,f) provide prompt fission γ-ray spectra characteristics: average number of photons per fission, average total energy per fission and mean photon energy; all within 2% of uncertainty. We present preliminary results on 239Pu(nth,f), recently measured at the Budapest Neutron Centre and supported by the CHANDA Trans-national Access Activity, as well as discussing our different published results in comparison to the historical data and what it says about the discrepancy observed in the benchmark calculations.

Original languageEnglish
Title of host publicationND 2016
Subtitle of host publicationInternational Conference on Nuclear Data for Science and Technology
EditorsPeter Siegler, Wim Mondelaers, Arjan Plompen, Franz-Josef Hambsch, Peter Schillebeeckx, Stefan Kopecky, Jan Heyse, Stephan Oberstedt
PublisherEDP Sciences
ISBN (Electronic)9782759890200
DOIs
Publication statusPublished - szept. 13 2017
Event2016 International Conference on Nuclear Data for Science and Technology, ND 2016 - Bruges, Belgium
Duration: szept. 11 2016szept. 16 2016

Publication series

NameEPJ Web of Conferences
Volume146
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Other

Other2016 International Conference on Nuclear Data for Science and Technology, ND 2016
CountryBelgium
CityBruges
Period9/11/169/16/16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Gatera, A., Belgya, T., Geerts, W., Göök, A., Hambsch, F. J., Lebois, M., Maróti, B., Oberstedt, S., Oberstedt, A., Postelt, F., Qi, L., Szentmiklósi, L., Vidali, M., & Zeiser, F. (2017). New prompt fission gamma-ray spectral data from 239Pu(nth, f) in response to a high priority request from OECD Nuclear Energy Agency. In P. Siegler, W. Mondelaers, A. Plompen, F-J. Hambsch, P. Schillebeeckx, S. Kopecky, J. Heyse, & S. Oberstedt (Eds.), ND 2016: International Conference on Nuclear Data for Science and Technology [04020] (EPJ Web of Conferences; Vol. 146). EDP Sciences. https://doi.org/10.1051/epjconf/201714604020