The evaluation of deformation and fracture of Gilsocarbon graphite subject to service environments

Experimental and modelling

Conference paper (2017)

Authors

B. Šavija Materials and Environment - CEG
G.E. Smith University of Bristol
Peter J. Heard University of Bristol
E. Sarakinou University of Bristol
James E. Darnbrough University of Bristol
Keith R. Hallam University of Bristol
E. Schlangen Materials and Environment - CEG
P.E.J. Flewitt University of Bristol
Research Group
Materials and Environment (CEG) (TU Delft)
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Published Date

2017

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

Commercial graphites are used for a wide range of applications. For example, Gilsocarbon graphite is used within the reactor core of Advanced Gas Cooled Reactors (UK) as a moderator. In service, the mechanical properties of the graphite are changed as a result of neutron irradiation induced defects and porosity arising from radiolytic oxidation. In this paper, we discuss measurements undertaken of mechanical properties at the micro-length-scale for virgin and irradiated material. These data provide the necessary inputs to an experimentally-informed model that predicts the deformation and fracture properties of Gilsocarbon graphite at the centimetre-length-scale. The results provide an improved understanding of how the mechanical properties and fracture characteristics of this type of graphite change as a result of exposure to the service environment.

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