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arXiv · 1911.09374

Characterization of TRIGA RC-1 neutron irradiation facilities for radiation damage testing

Davide Chiesa·Mario Carta·Valentina Fabrizio·Luca Falconi·Angelo Grossi·Massimiliano Nastasi·Mario Palomba·Stefano Pozzi·Ezio Previtali·Pier Giorgio Rancoita·Barbara Ranghetti·Mauro Tacconi
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Abstract

This paper presents the results of neutron flux measurements at two irradiation facilities of the TRIGA Mark II reactor at ENEA Casaccia Research Center, Italy. The goal of these measurements is to provide a complete characterization of neutron irradiation facilities for accurate and precise dose evaluation in radiation damage tests and, more generally, for all applications that need a good knowledge of neutron flux in terms of intensity, energy spectrum and spatial distribution. The neutron activation technique is used to measure the activation rates of several reactions, chosen so to cover the whole energy range of neutron flux spectrum. A multi-group neutron flux measurement is obtained through an unfolding algorithm based on a Bayesian statistical model. The obtained results prove that this experimental method allows to measure the total neutron flux within 2% statistical uncertainty, and to get at the same time a good description of its energy spectrum and spatial distribution.

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Davide Chiesa, Mario Carta, Valentina Fabrizio, Luca Falconi, Angelo Grossi, Massimiliano Nastasi, Mario Palomba, Stefano Pozzi, Ezio Previtali, Pier Giorgio Rancoita, Barbara Ranghetti, Mauro Tacconi. 2019-11-21. Characterization of TRIGA RC-1 neutron irradiation facilities for radiation damage testing. https://doi.org/10.1140/epjp%2Fs13360-020-00334-7

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