X-ray tomographic in-service inspection of girth welds - The European project TomoWELD

Ewert, Uwe; Redmer, Bernhard; Walter, David; Thiessenhusen, Kai-Uwe; Bellon, Carsten; Clarke, Alan L.; Finke-Härkönen, Klaus-Peter

doi:10.1063/1.4914650

Title: X-ray tomographic in-service inspection of girth welds - The European project TomoWELD

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Abstract

The new standard 'ISO 17636-2:2013: Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray techniques with digital detectors', defines the practice for radiographic inspection of welded pipes for manufacturing and in-service inspection. It is applied in Europe for inspections of pipe welds in nuclear power plants as well as in chemical plants and allows a faster inspection with digital detector arrays (DDA) than with film. Nevertheless, it does not allow the evaluation of the depth and shape of volumetric and planar indications. In 2001 a planar tomography scanner, TomoCAR, was introduced for mechanized radiographic testing (RT) inspection and non-destructive measurement of cross sections. The project TomoWELD is based on a new concept of the scan geometry, an enhanced GPU based reconstruction, and the application of a new generation of photon counting DDAs based on CdTe crystal CMOS hybrids. The new detector permits the selection of energy thresholds to obtain an optimum energy range and reduction of the influence of scattered radiation. The concept and first measurements are presented. Flaw depth and shape of volumetric and planar irregularities can be determined.

Authors:

Ewert, Uwe; Redmer, Bernhard; Walter, David; Thiessenhusen, Kai-Uwe; Bellon, Carsten ^[1]; Clarke, Alan L. ^[2]; Finke-Härkönen, Klaus-Peter ^[3]

BAM Bundesanstalt für Materialforschung, Berlin (Germany)
TWI Technology Centre Wales, Port Talbot (United Kingdom)
Oy AJAT Ltd., Helsinki (Finland)

Publication Date:: Tue Mar 31 00:00:00 EDT 2015

OSTI Identifier:: 22391252

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1650; Journal Issue: 1; Conference: 41. Annual Review of Progress in Quantitative Nondestructive Evaluation, Boise, ID (United States), 20-25 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CADMIUM TELLURIDES; CHEMICAL PLANTS; COMPUTERIZED TOMOGRAPHY; CRYSTALS; DEFECTS; DEPTH; GAMMA RADIATION; IN-SERVICE INSPECTION; NUCLEAR POWER PLANTS; PHOTONS; THIN FILMS; WELDED JOINTS; X RADIATION

Citation Formats


                    Ewert, Uwe, Redmer, Bernhard, Walter, David, Thiessenhusen, Kai-Uwe, Bellon, Carsten, Nicholson, P. Ian, E-mail: ian.nicholson@twi.co.uk, Clarke, Alan L., and Finke-Härkönen, Klaus-Peter. X-ray tomographic in-service inspection of girth welds - The European project TomoWELD.  United States: N. p., 2015. 
        Web.  doi:10.1063/1.4914650.

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                    Ewert, Uwe, Redmer, Bernhard, Walter, David, Thiessenhusen, Kai-Uwe, Bellon, Carsten, Nicholson, P. Ian, E-mail: ian.nicholson@twi.co.uk, Clarke, Alan L., & Finke-Härkönen, Klaus-Peter. X-ray tomographic in-service inspection of girth welds - The European project TomoWELD.  United States.  https://doi.org/10.1063/1.4914650

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                    Ewert, Uwe, Redmer, Bernhard, Walter, David, Thiessenhusen, Kai-Uwe, Bellon, Carsten, Nicholson, P. Ian, E-mail: ian.nicholson@twi.co.uk, Clarke, Alan L., and Finke-Härkönen, Klaus-Peter. 2015.  
        "X-ray tomographic in-service inspection of girth welds - The European project TomoWELD".  United States.  https://doi.org/10.1063/1.4914650.

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@article{osti_22391252,

  title        = {X-ray tomographic in-service inspection of girth welds - The European project TomoWELD},

  author       = {Ewert, Uwe and Redmer, Bernhard and Walter, David and Thiessenhusen, Kai-Uwe and Bellon, Carsten and Nicholson, P. Ian, E-mail: ian.nicholson@twi.co.uk and Clarke, Alan L. and Finke-Härkönen, Klaus-Peter},

  abstractNote = {The new standard 'ISO 17636-2:2013: Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray techniques with digital detectors', defines the practice for radiographic inspection of welded pipes for manufacturing and in-service inspection. It is applied in Europe for inspections of pipe welds in nuclear power plants as well as in chemical plants and allows a faster inspection with digital detector arrays (DDA) than with film. Nevertheless, it does not allow the evaluation of the depth and shape of volumetric and planar indications. In 2001 a planar tomography scanner, TomoCAR, was introduced for mechanized radiographic testing (RT) inspection and non-destructive measurement of cross sections. The project TomoWELD is based on a new concept of the scan geometry, an enhanced GPU based reconstruction, and the application of a new generation of photon counting DDAs based on CdTe crystal CMOS hybrids. The new detector permits the selection of energy thresholds to obtain an optimum energy range and reduction of the influence of scattered radiation. The concept and first measurements are presented. Flaw depth and shape of volumetric and planar irregularities can be determined.},

  doi          = {10.1063/1.4914650},

  url          = {https://www.osti.gov/biblio/22391252},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1650,

  place        = {United States},

  year         = {Tue Mar 31 00:00:00 EDT 2015},

  month        = {Tue Mar 31 00:00:00 EDT 2015}

}

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