Characterisation of neutron fields: challenges in assessing the directional distribution

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SCK.CEN has carried out neutron field characterisation campaigns at several nuclear reactors. The main goal of these measurement campaigns was to evaluate the performance of different neutron personal dosemeters. To be able to evaluate the performance of neutron personal dosemeters in terms of Hp(10), knowledge of the directional distribution is indispensable. This distribution was estimated by placing several personal dosemeters on all six sides of a slab phantom. The interpretation and conversion of this information into a reliable value for Hp(10) requires great care. The data were analysed using three methods. In the first approach, a linear interpolation was performed on three perpendicular axes. In the other two approaches, an icosahedron was used to model the angle of incidence of the neutrons and a linear interpolation or a Bayesian analysis was performed. This study describes the limitations and advantages of each of these methods and provides recommendations for their use to estimate the personal dose equivalent Hp(10) for neutron dosimetry.


Original languageEnglish
Pages (from-to)335-338
JournalRadiation protection dosimetry
Issue number1-4
Publication statusPublished - Oct 2014
EventNEUDOS 2013 -12th Symposium on Neutron and Ion Dosimetry - IRSN- Institut de Radioprotection et de Sûreté Nucléaire, Aix-en-provence, France
Duration: 3 Jun 20137 Jun 2013


  • neutron fields, directional distribution, nuclear reactors, neutron personal dosemeters

ID: 354063