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    STP1398

    Establishment of Fe-Filtered Neutron Beam Facility and Measurement of the Filtered Neutrons

    Published: 0


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    Abstract

    Thick Fe-filters have been installed at the beam tube No.1 (B-1) facility of the Kyoto University Reactor (KUR) at the Research Reactor Institute, Kyoto University (KURRI). By making reactor neutrons penetrate through Fe-filters of 45 cm in thickness mixed with Al-filters of 35 cm in total thickness, the Fe-filtered neutron beam at 24 keV has been established. In order to characterize the B-1 Fe-filtered neutron beam facility, following experiments/ analyses have been performed; (1) the Fe-filtered neutrons at 24 keV have been measured with a proton recoil gas counter, (2) the neutron energy spectrum of the Fe-filtered neutrons has been obtained by analyzing the activation foil data using the NEUPAC code, and (3) the neutron flux at 24 keV also has been determined to be 6.7 × 106 n/cm2/s by the sandwiched gold foils using the 197Au(n, γ)198 Au reaction. It has been found that the neutron fluxes at 24 keV obtained above are in general agreement with each other. Finally, (4) the absorbed doses at the B-1 facility also have been measured with thermoluminescence dosimeters (TLDs) and tissue-equivalent pair chambers.

    Keywords:

    Fe-filtered neutrons, neutron beam facility, 24 keV, KUR, a proton recoil gas counter, activation foil data, neutron spectrum adjustment, NEUPAC code, sandwich foil method, absorbed doses, TLDs, tissue-equivalent pair chambers


    Author Information:

    Kobayashi, K
    Research Reactor Institute, Kyoto University, Osaka,

    Yoshimoto, T
    Research Reactor Institute, Kyoto University, Osaka,

    Fujita, Y
    Research Reactor Institute, Kyoto University, Osaka,

    Utsuro, M
    Research Reactor Institute, Kyoto University, Osaka,

    Utsumi, H
    Research Reactor Institute, Kyoto University, Osaka,


    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP13595S