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[en] Before to change the HEU for Leu fuel of the ININ's TRIGA Mark III nuclear reactor the neutron spectra were measured in two beam ports using 5 and 10 W. Measurements were carried out in a tangential and a radial beam port using a Bonner sphere spectrometer. It was found that neutron spectra are different in the beam ports, in radial beam port the amplitude of thermal and fast neutrons are approximately the same while, in the tangential beam port thermal neutron peak is dominant. In the radial beam port the fluence-to-ambient dose equivalent factors are 131±11 and 124±10 p Sv-cm2 for 5 and 10 W respectively while in the tangential beam port the fluence-to-ambient dose equivalent factor is 55±4 p Sv-cm2 for 10 W. (Author)
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Oct 2012; 4 p; Sociedad Mexicana de Irradiacion y Dosimetria; Mexico D. F. (Mexico); 13. International Symposium; 13. Conferencia Internacional; Ocoyoacac, Estado de Mexico (Mexico); 15-19 Oct 2012; 23. National Congress on Solid State Dosimetry; 23. Congreso Nacional sobre Dosimetria de Estado Solido; Ocoyoacac, Estado de Mexico (Mexico); 15-19 Oct 2012; ISBN 978-607-00-6167-7; 