Characteristics of the neutron field of the facility at DIN-UPM

Radiation Protection Dosimetry
E GallegoInternational Organization for Standardization

Abstract

A new source facility (241Am-Be) has been installed in a bunker-type room of large dimensions. To characterise the neutron fields in the facility, detailed calculations have been made with MCNP-4C, showing the different components of the neutron radiation reaching the reference points (direct, inscattered, backscattered). The contribution from neutrons scattered in the walls to the total ambient dose equivalent remains reasonably low (<10%) in the reference points. Additionally, spectra measurements have been performed with a Bonner spheres spectrometer with a 6LiI(Eu) scintillator (0.4 phi x 0.4 cm2), UTA4 response matrix and BUNKIUT unfolding code. The calculated and experimentally obtained spectra are compared, with small differences found in the epithermal and thermal region, attributable to the concrete composition used in the calculations. The H*(10) rate has been determined from the spectra, and then compared to the reading of an active dosemeter (LB6411), with differences found lower than 8%.

References

Aug 2, 2002·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Héctor René Vega-CarrilloAureliano Carrillo-Nuñez

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Citations

Sep 9, 2004·Radiation Protection Dosimetry·J L MuñizA Delgado
Jun 18, 2010·Radiation Protection Dosimetry·Hakim MazrouMalika Allab
Dec 15, 2004·Health Physics·R BarqueroT M Edwards
Jun 29, 2012·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Hector Rene Vega-CarrilloRoberto Méndez
May 18, 2010·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Hakim MazrouMalika Allab
Apr 8, 2016·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Hector Rene Vega-Carrillo, Segundo Agustín Martinez-Ovalle
Oct 25, 2014·Radiation Protection Dosimetry·S D MonkM J Joyce
Oct 21, 2005·Physics in Medicine and Biology·R MéndezR Barquero
Jan 17, 2021·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Gonzalo F Garcia-FernandezKaren A Guzman-Garcia

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