Robotic ultrasonic testing of AGR fuel cladding

Maxim Morozov, S. Gareth Pierce, Gordon Dobie, Gary T. Bolton, Thomas Bennett

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

3 Citations (Scopus)
80 Downloads (Pure)


The purpose of the presented work was to undertake experimental trials to demonstrate the potential capabilities of an in-situ robotic ultrasonic scanning technique for measuring and monitoring loss of the cladding wall thickness in fuel pins of Advanced Gas-cooled Reactors (AGR) using inactive (i.e. non-radioactive) samples. AGR fuel pins are stainless steel cylindrical ribbed pipes of length circa of 1000 mm, inner diameter of the rod being circa 15 mm and wall thickness of circa 300µm. Spent AGR fuel pins are stored in a water pond and thus may be prone to corrosion and stresscorrosion cracking under adverse conditions. An ultrasonic immersion transducer with central frequency of 25MHz was used to measure wall thickness of the AGR fuel cladding using a frequency domain technique. Cylindrical ultrasonic scan of the samples 2 was performed using industrial robotic arm KUKA KR 5 arc HW. Also, very short (2.5mm long) and shallow (100µm in depth) crack-like defects were detected using time-domain technique.
Original languageEnglish
Title of host publication55th Annual Conference of The British Institute of Non-Destructive Testing NDT-2016
Place of PublicationNorthampton
Number of pages11
Publication statusPublished - 12 Sep 2016
Event55th Annual British Conference of Non-Destructive Testing - East Midlands Conference Centre and Orchard Hotel, Nottingham, United Kingdom
Duration: 12 Sep 201614 Sep 2016


Conference55th Annual British Conference of Non-Destructive Testing
Abbreviated titleNDT2016
Country/TerritoryUnited Kingdom


  • in-situ robotic ultrasonic scanning technique
  • cladding wall thickness
  • fuel pins
  • advanced gas-cooled reactors

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