Simulation model for estimating probabilities of defects in welds

O. J V Chapman, M. A. Khaleel, F. A. Simonen

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

10 Citations (Scopus)

Abstract

In recent work for the U.S. Nuclear Regulatory Commission in collaboration with Battelle Pacific Northwest National Laboratory, Rolls-Royce and Associates Ltd. has adapted an existing model for piping welds to address welds in reactor pressure vessels. This paper describes the flaw estimation methodology as it applies to flaws in reactor pressure vessel welds (but not flaws in base metal or flaws associated with the cladding process). Details of the associated computer software (RR-PRODIGAL) are provided. The approach uses expert elicitation and mathematical modeling to simulate the steps in manufacturing a weld and the errors that lead to different types of weld defects. The defects that may initiate in weld beads include center cracks, lack of fusion, slag, pores with tails, and cracks in heat affected zones. Various welding processes are addressed including submerged metal arc welding. The model simulates the effects of both radiographic and dye penetrant surface inspections. Output from the simulation gives occurrence frequencies for defects as a function of both flaw size and flaw location (surface connected and buried flaws). Numerical results are presented to show the effects of submerged metal arc versus manual metal arc weld processes.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
EditorsH.S. Mehta, S. Bhandari, D. Jones, S. Rahman, G. Wilkowski, K.K. Yoon
PublisherASME
Pages375-382
Number of pages8
Volume323
Edition1
Publication statusPublished - 1996
Externally publishedYes
EventProceedings of the 1996 ASME Pressure Vessels and Piping Conference. Part 1 (of 2) - Montreal, Can
Duration: 21 Jul 199626 Jul 1996

Other

OtherProceedings of the 1996 ASME Pressure Vessels and Piping Conference. Part 1 (of 2)
CityMontreal, Can
Period21/7/9626/7/96

Fingerprint

Welds
Defects
Metals
Pressure vessels
Cracks
Electric arc welding
Heat affected zone
Slags
Welding
Fusion reactions
Dyes
Inspection

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Chapman, O. J. V., Khaleel, M. A., & Simonen, F. A. (1996). Simulation model for estimating probabilities of defects in welds. In H. S. Mehta, S. Bhandari, D. Jones, S. Rahman, G. Wilkowski, & K. K. Yoon (Eds.), American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP (1 ed., Vol. 323, pp. 375-382). ASME.

Simulation model for estimating probabilities of defects in welds. / Chapman, O. J V; Khaleel, M. A.; Simonen, F. A.

American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. ed. / H.S. Mehta; S. Bhandari; D. Jones; S. Rahman; G. Wilkowski; K.K. Yoon. Vol. 323 1. ed. ASME, 1996. p. 375-382.

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

Chapman, OJV, Khaleel, MA & Simonen, FA 1996, Simulation model for estimating probabilities of defects in welds. in HS Mehta, S Bhandari, D Jones, S Rahman, G Wilkowski & KK Yoon (eds), American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. 1 edn, vol. 323, ASME, pp. 375-382, Proceedings of the 1996 ASME Pressure Vessels and Piping Conference. Part 1 (of 2), Montreal, Can, 21/7/96.
Chapman OJV, Khaleel MA, Simonen FA. Simulation model for estimating probabilities of defects in welds. In Mehta HS, Bhandari S, Jones D, Rahman S, Wilkowski G, Yoon KK, editors, American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. 1 ed. Vol. 323. ASME. 1996. p. 375-382
Chapman, O. J V ; Khaleel, M. A. ; Simonen, F. A. / Simulation model for estimating probabilities of defects in welds. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. editor / H.S. Mehta ; S. Bhandari ; D. Jones ; S. Rahman ; G. Wilkowski ; K.K. Yoon. Vol. 323 1. ed. ASME, 1996. pp. 375-382
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