The measurement of neutron and neutron induced photon spectra in fusion reactor related assemblies |
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| Affiliation: | 1. Institut für Kern-und Teilchenphysik, Technische Universität Dresden, Mommsenstrasse 13, 01062 Dresden, Germany;2. Physikalisch Technische Bundesanstalt, Braunschweig, Germany;1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;3. Key Laboratory of Nuclear Solid State Physics Hubei Province, Wuhan University, Wuhan 430072, China;4. Hefei Science Center of Chinese Academy of Sciences, Hefei 230031, China;5. Hefei Center for Physical Science and Technology, Hefei 230031, China;1. Department of Engineering Physics, Tsinghua University, Beijing 100084, China;1. ITER Organization, Route de Vinon sur Verdon, F-13067 Saint Paul Lez Durance, France;2. CEA, DEN/DADN, centre de Saclay, F-91191 Gif-sur-Yvette cedex, France;3. Institute for Plasma Research, Bhat, Gandhinagar 382428, India;4. Japan Atomic Energy Agency, Naka-shi, Ibaraki-ken 311-0193, Japan;5. Korea Atomic Energy Research Institute, Daejeon, Republic of Korea;6. European Commission, DG ENER, Brussels, Belgium;7. Fusion for Energy, Barcelona, Spain;8. China Nuclear Energy Industry Corporation, Beijing 100032, China;1. ENEA Fusion and Technology for Nuclear Safety and Security Department, CR Frascati, Via Enrico Fermi 45, 00044 Frascati, Roma, Italy;2. ENEA Fusion and Technology for Nuclear Safety and Security Department, CR Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Roma, Italy;1. Laboratory of Plasma Physics and Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Japan;2. Hydrogen Isotope Research Center, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan |
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| Abstract: | The spectral neutron and photon fluence (or flux) measured outside and inside of assemblies related to fusion reactor constructions are basic quantities of fusion neutronics. The comparison of measured spectra with the results of MCNP neutron and photon transport calculations allows a crucial test of evaluated nuclear data as generally used in fusion applications to be carried out.The experiments concern mixed neutron/photon fields with about the same intensity of the two components. An NE-213 scintillation spectrometer, well described by response matrices for both neutrons and photons, is used as proton-recoil and Compton spectrometer. The experiments described here in more detail address the background problematic of two applications, an iron benchmark experiment with an ns-pulsed neutron source and a deep penetration mock-up experiment for the investigation of the ITER in-board shield system. The measured spectral neutron and photon fluences are compared with spectra calculated with the MCNP code on the basis of FENDL-1 data. The agreement is better than 10% except for the photon fluence from the iron benchmark experiment, which is underestimated in the calculations by 25%. |
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