Modeling of thermal fatigue crack for enhancement of electromagnetic nondestructive evaluation of nuclear power plant

Jing Wang, Noritaka Yusa, Hongliang Pan, Mika Kemppainen, Iikka Virkkunen, Hidetoshi Hashizume

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)

Abstract

The present study investigates modeling of thermal fatigue crack by the finite element method from the view point of eddy current testing. Three artificially produced thermal fatigue cracks introduced into Inconel 600 specimens are prepared Eddy current signals are gathered by a differential type plus point probe with 25 kHz and 100 kHz. Subsequent destructive tests show the profile of these cracks. In the numerical simulation thermal fatigue crack is modeled as a region with constant width, uniform conductivity and real profile. Results of the study combining the previous study on modeling of thermal fatigue crack in type 304 stainless steel specimen reveal that thermal fatigue crack, unlike stress corrosion crack, generally should be modeled as an almost nonconductive region regardless of frequencies. Furthermore the resistance of thermal fatigue crack defined as width divided by conductivity is almost unchanged, even though the appropriate conductivity and width are changing with the frequency.

Original languageEnglish
Title of host publicationPlant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Radiation Protection and Nuclear Technology Applications
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume1
ISBN (Print)9780791855782
DOIs
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Nuclear Engineering - Chengdu, China
Duration: 29 Jul 20132 Aug 2013
Conference number: 21

Conference

ConferenceInternational Conference on Nuclear Engineering
Abbreviated titleICONE
CountryChina
CityChengdu
Period29/07/201302/08/2013

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