A new approach for crack detection and sizing in nuclear reactor cores
Devereux, Michael G and Murray, Paul and West, Graeme M. (2020) A new approach for crack detection and sizing in nuclear reactor cores. Nuclear Engineering and Design, 359. 110464. ISSN 0029-5493 (https://doi.org/10.1016/j.nucengdes.2019.110464)
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Abstract
Remote Visual Inspection (RVI) of reactors in nuclear power plants allows station operators to assess the health and condition of their plant. In the UK, most nuclear stations are of the Advanced Gas-cooled Reactor (AGR) design. During planned periodic outages, a representative portion of each AGR core is inspected using specialist tools equipped with various sensors including a video camera for RVI. If cracks are observed in the core during data capture, a stitched image of the region needs to be created so that the crack can be analysed and sentenced (classifying the crack morphology, location, orientation and size) before the station is returned to service, provided return to service is justified. Currently, the crack analysis and sizing activities are conducted manually by expert analysts in a laborious process. In this paper, we present a new image processing approach capable of automating aspects of the crack analysis process. Specifically, we describe a set of techniques for quickly and accurately detecting the presence of cracks in AGR fuel channel inspection images. We also present a method for detecting circular channel features known as trepanned holes whose dimensions are known and can thus be used for scaling. The results of applying the proposed techniques are evaluated on image data from real AGR fuel channels and are shown to produce comparable results to those obtained manually. The advantage of the proposed approach is that it is fast, robust and more repeatable than the existing manual approach.
ORCID iDs
Devereux, Michael G, Murray, Paul ORCID: https://orcid.org/0000-0002-6980-9276 and West, Graeme M. ORCID: https://orcid.org/0000-0003-0884-6070;-
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Item type: Article ID code: 70821 Dates: DateEvent1 April 2020Published17 December 2019Published Online2 December 2019AcceptedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering
Strategic Research Themes > EnergyDepositing user: Pure Administrator Date deposited: 11 Dec 2019 16:18 Last modified: 12 Dec 2024 09:03 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/70821