Energy distribution of the neutron flux measurements at the Chilean Reactor RECH-1 using multi-foil neutron activation and the Expectation Maximization unfolding algorithm

F. Molina, P. Aguilera, J. Romero-Barrientos, H. F. Arellano, J. Agramunt, J. Medel, J. R. Morales, M. Zambra

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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)×1013 cm−2 s−1 for the thermal neutron energy region, 1.9(5)×1012 cm−2 s−1 for the epithermal neutron energy region, and 4.3(11)×1011 cm−2 s−1 for the fast neutron energy region.

Original languageEnglish
Pages (from-to)28-34
Number of pages7
JournalApplied Radiation and Isotopes
Volume129
DOIs
Publication statusPublished - Nov 2017
Externally publishedYes

Keywords

  • Expectation maximization
  • Experimental reactor neutron flux distribution
  • Neutron activation

ASJC Scopus subject areas

  • Radiation

Fingerprint

Dive into the research topics of 'Energy distribution of the neutron flux measurements at the Chilean Reactor RECH-1 using multi-foil neutron activation and the Expectation Maximization unfolding algorithm'. Together they form a unique fingerprint.

Cite this