Artículos de revistas
Energy distribution of the neutron flux measurements at the chilean reactor RECH-1 using multi-foil neutron activation and the expectation maximization unfolding algorithm
Fecha
2017Registro en:
Applied Radiation and Isotopes 129 (2017) 28–34
10.1016/j.apradiso.2017.08.001
Autor
Molina, F.
Aguilera, P.
Romero Barrientos, J.
Arellano Sepúlveda, Hugo
Agramunt, J.
Medel, J.
Morales, J. R.
Zambra, M.
Institución
Resumen
We present a methodology to obtain the energy distribution of the neutron flux of an experimental nuclear reactor, using multi-foil activation measurements and the Expectation Maximization unfolding algorithm, which is presented as an alternative to well known unfolding methods such as GRAVEL. Self-shielding flux corrections for energy bin groups were obtained using MCNP6 Monte Carlo simulations. We have made studies at the at the Dry Tube of RECH-1 obtaining fluxes of 1.5(4) x 10(13) cm(-2) s(-1) for the thermal neutron energy region, 1.9(5) x 10(12) cm(-2) s(-1) for the epithermal neutron energy region, and 4.3(11) x 10(11) cm(-2) s(-1) for the fast neutron energy region.