TAILIEUCHUNG - Critical review of CIELO evaluations of n + 235U, 238U using differential experiments

Key reactions have been selected to compare (CIELO 2) and IAEA CIELO (CIELO 1) evaluated nuclear data files for neutron induced reactions on 235U and 238U targets. IAEA CIELO evaluation uses reaction models to construct the evaluation prior, but strongly relied on differential data including all reaction cross sections fitted within the IAEA Neutron Standards project. | Critical review of CIELO evaluations of n 235U 238U using differential experiments EPJ Nuclear Sci. Technol. 4 27 2018 Nuclear Sciences R. Capote and A. Trkov published by EDP Sciences 2018 amp Technologies https epjn 2018029 Available online at https REGULAR ARTICLE Critical review of CIELO evaluations of n 235U 238 U using differential experiments Roberto Capote and Andrej Trkov NAPC Nuclear Data Section International Atomic Energy Agency Vienna 1400 Austria Received 18 December 2017 Received in final form 28 February 2018 Accepted 14 May 2018 Abstract. Key reactions have been selected to compare CIELO 2 and IAEA CIELO CIELO 1 evaluated nuclear data files for neutron induced reactions on 235U and 238U targets. IAEA CIELO evaluation uses reaction models to construct the evaluation prior but strongly relied on differential data including all reaction cross sections fitted within the IAEA Neutron Standards project. The evaluation relied on a mix of differential and integral data with strong contribution from nuclear reaction modelling. Differences in evaluations are discussed a better reproduction of differential data for the IAEA CIELO evaluation is shown for key reaction channels. 1 Introduction 2 Comparison of and IAEA CIELO evaluations An international collaboration called CIELO Collabora- tive International Evaluated Library Organisation was Let s review some of relevant reaction channels. initiated by the Nuclear Energy Agency of the OECD with the main goal to improve our understanding of neutron Total cross sections reactions on key isotopes that are important in nuclear applications 1 4 . A central role of this project is taken by Neutron total cross sections from 20 keV to 30 MeV on 235U 235 U and 238U which are the major components of the and 238U targets agree within experimental uncertainty reactor fuel in energy applications. about 2 3 including 1 systematic for both Existing .

• Năng lượng
• JEFF 3 3 (CIELO 2)
• IAEA CIELO (CIELO 1)
• Nuclear data files
• Neutron induced reactions
• IAEA CIELO evaluation
• IAEA Neutron Standards project