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

28 Downloads (Pure)

Abstract

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 Sep 2015
Event54th Annual British Conference of Non-Destructive Testing, NDT 2015 - International Centre, Telford, United Kingdom
Duration: 8 Sep 201510 Sep 2015

Conference

Conference54th Annual British Conference of Non-Destructive Testing, NDT 2015
CountryUnited Kingdom
CityTelford
Period8/09/1510/09/15

Fingerprint

Gas cooled reactors
Eddy current testing
Eddy currents
Frequency response
Water
Transducers
Defects
Air

Keywords

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

Cite this

Morozov, M., Pierce, S. G., & Bolton, G. T. (2015). Eddy current testing of AGR fuel cladding. In 54th Annual British Conference of Non-Destructive Testing, NDT 2015 Northampton.
Morozov, Maxim ; Pierce, S Gareth ; Bolton, Gary T. / Eddy current testing of AGR fuel cladding. 54th Annual British Conference of Non-Destructive Testing, NDT 2015. Northampton, 2015.
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Morozov, M, Pierce, SG & Bolton, GT 2015, Eddy current testing of AGR fuel cladding. in 54th Annual British Conference of Non-Destructive Testing, NDT 2015. Northampton, 54th Annual British Conference of Non-Destructive Testing, NDT 2015, Telford, United Kingdom, 8/09/15.

Eddy current testing of AGR fuel cladding. / Morozov, Maxim; Pierce, S Gareth; Bolton, Gary T.

54th Annual British Conference of Non-Destructive Testing, NDT 2015. Northampton, 2015.

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

TY - GEN

T1 - Eddy current testing of AGR fuel cladding

AU - Morozov, Maxim

AU - Pierce, S Gareth

AU - Bolton, Gary T

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N2 - 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.

AB - 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.

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Morozov M, Pierce SG, Bolton GT. Eddy current testing of AGR fuel cladding. In 54th Annual British Conference of Non-Destructive Testing, NDT 2015. Northampton. 2015