title: Analysis of Radiation Damage in Light Water Reactors: Comparison of Cluster Analysis Methods for the Analysis of Atom Probe Data.
abstract: Irradiation of reactor pressure vessel (RPV) steels causes the formation of nanoscale microstructural features (termed radiation damage), which affect the mechanical properties of the vessel. A key tool for characterizing these nanoscale features is atom probe tomography (APT), due to its high spatial resolution and the ability to identify different chemical species in three dimensions. Microstructural observations using APT can underpin development of a mechanistic understanding of defect formation. However, with atom probe analyses there are currently multiple methods for analyzing the data. This can result in inconsistencies between results obtained from different researchers and unnecessary scatter when combining data from multiple sources. This makes interpretation of results more complex and calibration of radiation damage models challenging. In this work simulations of a range of different microstructures are used to directly compare different cluster analysis algorithms and identify their strengths and weaknesses.
authors.affiliation: 1National Nuclear Laboratory,Culham Science Centre,Building D5,Abingdon,Oxfordshire OX14 3DB,UK.
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Hyde
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Gérald
authors.initials: G
authors.lastname: DaCosta
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Constantinos
authors.initials: C
authors.lastname: Hatzoglou
authors.affiliation: 1National Nuclear Laboratory,Culham Science Centre,Building D5,Abingdon,Oxfordshire OX14 3DB,UK.
authors.forename: Hannah
authors.initials: H
authors.lastname: Weekes
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Radiguet
authors.affiliation: 1National Nuclear Laboratory,Culham Science Centre,Building D5,Abingdon,Oxfordshire OX14 3DB,UK.
authors.forename: Paul D
authors.initials: PD
authors.lastname: Styman
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Francois
authors.initials: F
authors.lastname: Vurpillot
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Cristelle
authors.initials: C
authors.lastname: Pareige
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Auriane
authors.initials: A
authors.lastname: Etienne
authors.affiliation: 4Studiecentrum voor Kernenergie-Centre d'Etudes de l'Energie Nucléaire (SCK-CEN),Institute of Nuclear Materials Science,Expert Group of Structural Materials,Boeretang 200,B-2400 Mol,Belgium.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Bonny
authors.affiliation: 4Studiecentrum voor Kernenergie-Centre d'Etudes de l'Energie Nucléaire (SCK-CEN),Institute of Nuclear Materials Science,Expert Group of Structural Materials,Boeretang 200,B-2400 Mol,Belgium.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Castin
authors.affiliation: 4Studiecentrum voor Kernenergie-Centre d'Etudes de l'Energie Nucléaire (SCK-CEN),Institute of Nuclear Materials Science,Expert Group of Structural Materials,Boeretang 200,B-2400 Mol,Belgium.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Malerba
authors.affiliation: 3UNIROUEN,INSA Rouen,CNRS,Groupe de Physique des Matériaux,Normandie Université,76000 Rouen,France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Pareige
keywords: atom probe field ion microscopy; solute clustering; statistical analysis