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  1. Multisphere spectrometry and analysis of TEPC and REM meter results around a heavy water moderated reactor.

    Article - En anglais

    The NRU reactor is a vertically oriented, heavy water moderated and cooled research reactor.

    Water and iron shielding above the core permit only a small amount of leakage neutrons through the top deck plate.

    Two leakage neutron spectra determined using a multisphere, or Bonner sphere, system are reported here.

    The spectra are used to analyse measurements made with a moderator-type neutron dose equivalent meter (i.e. a rem meter) and a tissue-equivalent proportional counter (TEPC) system.

    Rem meter readings are not reproduced by folding the response function of the instrument with the fluence spectra.

    Based on TEPC and Bonner sphere data, ambient dose equivalents are found to be 30 and 17 muSv. h-1 (±25%), in the two locations investigated, for a reactor power level of 107 MW.

    Mots-clés Pascal : Spectrométrie multidimensionnelle, Modèle sphérique, Réacteur nucléaire, Irradiation neutron, Radioprotection, Technique mesure, Eau, Refroidissement, Equivalent dose, Compteur, Compteur proportionnel, Pollution radioactive, Médecine travail, Epidémiologie, Génie biomédical

    Mots-clés Pascal anglais : N dimensional spectrometry, Spherical model, Nuclear reactor, Neutron irradiation, Radioprotection, Measurement technique, Water, Cooling, Dose equivalent, Meter, Proportional counter, Radioactive pollution, Occupational medicine, Epidemiology, Biomedical engineering

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 95-0412256

    Code Inist : 002B30B01B. Création : 01/03/1996.