%0 Journal Article
%T Thermal and epithermal neutron fluence rates in the irradiation facilities of the TRIGA IPR-R1 nuclear reactor
%A Zangirolami
%A Dante Marco
%A Oliveira
%A Arno Heeren de
%A Ferreira
%A Andr¨¦a Vidal
%J Brazilian Journal of Physics
%D 2010
%I Scientific Electronic Library Online
%R 10.1590/S0103-97332010000100008
%X the triga ipr-r1 nuclear reactor at the centro de desenvolvimento da tecnologia nuclear cdtn/cnen, belo horizonte, brazil, has three irradiation facilities: a rotary specimen rack outside the reactor core with 40 irradiation channels which provide large scale isotope irradiation; the central tube placed at the center of the reactor core which permits sample irradiation with maximum neutron flux, as well as neutron beam extraction; a pneumatic transfer tube which makes possible the analysis of short half-life radioisotopes. the aim of this work is to evaluate the thermal and epithermal neutron fluence rates in the three irradiation facilities of the ipr-r1. al-0.1%au reference materials were irradiated bare and cd-covered, at 100 kw thermal power, and gamma spectrometry was applied with an hpge detector. for the rotary specimen rack, the values obtained for thermal and epithermal neutron fluence rates are (8.2 ¡À 0.2) ¡Á 1011n.cm-2.s-1 and (3.5 ¡À 0.1) ¡Á 1010n.cm-2.s-1, respectively. for the pneumatic transfer tube and the central tube, epithermal neutron fluence rate values are respectively (3.3 ¡À 0.2) ¡Á109n.cm-2.s-1 and (2.6 ¡À 0.1) x 1011n.cm-2.s-1. for these facilities, thermal neutron fluence rate values are (2.5 ¡À 0.2) ¡Á 1011n.cm-2.s-1 and (2.8 ¡À 0.1) ¡Á 1012n.cm-2.s-1, respectively. knowledge of these parameters will be fundamental in the planning of sample irradiation for analysis or radioisotope production in a more accurate way.
%K triga ipr-r1 nuclear reactor
%K neutron fluence rate
%K neutron activation analysis
%K irradiation facilities.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-97332010000100008&lng=en&nrm=iso&tlng=en