In situ crystalline CTE measurements of nuclear graphite as a function of load and irradiation history

DOI

Graphite bricks are both the moderator and structural components at the heart of the Advanced Gas-cooled Reactor (AGR) cores. Internal stress arises from the moderation role of the graphite components, which leads to uneven material ageing across the component. These stresses are greatly increased by changes to the coefficient of thermal expansion (CTE), which is a function of irradiation and stress. These stresses can themselves be relaxed over time by the irradiation-induced creep. The need for reliable experimental data on these phenomena has driven this proposal. We propose the direct and in situ measurement of the crystalline CTE of irradiated Gilsocarbon nuclear graphite, over a test matrix comprising load, irradiation history, and temperature. The results will be incorporated into existing models for the stress state of polygranular graphite, improving model reliability.

Identifier
DOI https://doi.org/10.5286/ISIS.E.87816304
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/87816304
Provenance
Creator Dr Joe Kelleher; Dr Saurabh Kabra; Dr Zhanna Mileeva; Dr Joshua Taylor; Dr Ram Krishna; Dr James Wade; Mrs Tatiana Grebennikova; Professor Paul Mummery
Publisher ISIS Neutron and Muon Source
Publication Year 2021
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Construction Engineering and Architecture; Engineering; Engineering Sciences
Temporal Coverage Begin 2017-09-24T08:00:00Z
Temporal Coverage End 2018-04-19T11:13:15Z