The development of a physical model of an Advanced Gas Cooled Reactor core: Outline of the feasibility study

Luiza Dihoru*, Olafur Oddbjornsson, Panos Kloukinas, Matt Dietz, Tony Horseman, Elia Voyagaki, Adam J. Crewe, Colin A. Taylor, Alan G. Steer

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

6 Citations (Scopus)
281 Downloads (Pure)


The ageing issues of the Advanced Gas Cooled Reactor (AGR) cores need addressing to maintain their safe and reliable operation, hence the requirement for the computer models of the cores used for the seismic resilience assessments to be conservative and to represent larger percentages of damaged graphite components. The current models have undergone limited experimental validation for high levels of degradation, so there is a need to validate those numerical models and also to enhance the understanding of core dynamics by physical modelling and testing. This paper outlines the feasibility study of a quarter scale model rig of an AGR core developed by the University of Bristol. The damage scenarios to be considered in demonstrating the core seismic tolerability were defined. The principles of scale modelling were put under scrutiny in parallel with several practical aspects of material selection and component design and manufacturing. Several variants of physical models of different size and shape were proposed and their merits with respect to their feasibility and outcomes were discussed. Aspects of instrumentation design are presented together with relevant measurement results. The rig is a viable experimental tool whose outputs can be employed directly in computer model validation.
Original languageEnglish
Pages (from-to)269-279
Number of pages11
JournalNuclear Engineering and Design
Early online date22 Jan 2017
Publication statusPublished - Nov 2017


  • Advanced Gas Cooled Reactor
  • Seismic resilience
  • Physical model


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