title: Characterisation of neutron fields: challenges in assessing the directional distribution.
abstract: The 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.
authors: SCK·CEN, Boeretang 200, Mol 2400, Belgium.
authors: Vanessa
authors: V
authors: Cauwels
authors: SCK·CEN, Boeretang 200, Mol 2400, Belgium filip.vanhavere@sckcen.be.
authors: Filip
authors: F
authors: Vanhavere
authors: Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany.
authors: Marcel
authors: M
authors: Reginatto
mesh_terms: D000465:Algorithms; D001499:Bayes Theorem; D004867:Equipment Design; D006801:Humans; D009502:Neutrons; D055848:Nuclear Power Plants; D009688:Nuclear Reactors; D016273:Occupational Exposure; D019047:Phantoms, Imaging; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods*; D011835:Radiation Protection / Q000295:instrumentation / Q000379:methods*; D012016:Reference Values