Reacteur BR1 - Première operation de recuit

Gabriel Penelle, Alexis Osipenco, R. Cornet, Stéphane De Burbure de Wesembeek, Roger Penninckx, H. Braun

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    Abstract

    Followlng a sIx years' perlod of operatlon at a maximum
    power of M- MW, the BRl reactor was annealed In order to release the
    Wigner energy stored in the crystalline lattice of lts moderating graphite
    . When the annealing was performed, the maximum energy was of the
    order of 90 cal/g . None of the usual annealing procedures I.e. the
    nuclear heating or the fIow of hot air in the plle, was used but a new
    process, the internal electrical heating, had to be developed for that
    purpose ; moreover, the fuel elements were unloaded from the reactor
    before the annealing • The report describes in a detailed manner the
    new System which was used and States the advantages of unioading the
    ura niurn .
    The studies and simulations done before the annealing, the
    methods used for measuring the energy of the graphite, and an estimate
    of the cost of the material are d‘scussed in a first part, which also
    includes a descr’ptlon of the material, the procedures established in
    order to guarantee the safety of the operation, and the doses integrated
    by the workers during the doublé handling of the 28 tons of irradiated
    uranium Included in the core •
    In a second part, the chronology of the annealing and its
    results are descr'bed and Illustrated ; they can be summarlzed as fotlows
    r a maximum temperature voluntarily limited at 398*C, more than
    300*C foi 26 hours *n the central part of the plle where the remainlng
    energy as measured after the annealing has dropped from 90 cal/g down
    to less than 2 cal/g.
    Original languageEnglish
    PublisherSCK CEN
    Number of pages234
    StatePublished - Oct 1962

    Publication series

    NameSCK CEN Reports
    PublisherSCK CEN
    No.BLG-135

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