Eddy current testing of AGR fuel cladding

Maxim Morozov, S Gareth Pierce, Gary T Bolton

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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The scope of the presented study was to investigate feasibility of Eddy Current Testing (ECT) for detection in storage of inter-granular attack (IGA) cracking and general clad thinning of irradiated fuel cladding from Advanced Gas-cooled Reactors (AGR). The impact of the storage environment, particularly the effect of immersion in water compared to measurements in air, has also been investigated. A miniature EC probe was developed to induce eddy currents in a pin and to read out EC response. The transducer was robotically moved along the AGR pin and multi-frequency EC responses were acquired using a spectrum analyser. Main results of the experimental investigation are the following: even very small artificial defects such as short EDM notches of depth of 100μm produce distinguishable EC response; localised clad thinning of depth of 100μm and above produces considerable EC response levels; effect of water environment on the EC response is negligible; effect of anti-stacking grooves on the EC response is considerable.

Original languageEnglish
Title of host publication54th Annual British Conference of Non-Destructive Testing, NDT 2015
Place of PublicationNorthampton
Number of pages12
Publication statusPublished - 8 Sept 2015
Event54th Annual British Conference of Non-Destructive Testing, NDT 2015 - International Centre, Telford, United Kingdom
Duration: 8 Sept 201510 Sept 2015


Conference54th Annual British Conference of Non-Destructive Testing, NDT 2015
Country/TerritoryUnited Kingdom


  • Eddy current testing
  • fuel cladding
  • irradiated fuels
  • nondestructive examination
  • artificial defects


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