Summary of results from the IPIRG-2 round-robin analysis

Sharif Rahman; R Olson; A Rosenfield; G Wilkowski; U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research.Division of Engineering Technology

doi:10.2172/197842

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Summary of results from the IPIRG-2 round-robin analysis

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Summary of results from the IPIRG-2 round-robin analysis

Sharif Rahman, R Olson, A Rosenfield, G Wilkowski and U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research.Division of Engineering Technology

NUREG/CR, Division of Engineering Technology, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission :Supt. of Docs., U.S. G.P.O. [distributor]

02/2026

DOI: 10.2172/197842

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Abstract

This report presents a summary of the results from three one-day international round-robin workshops which were organized by Battelle in conjunction with the Second International Piping Integrity Research Group (IPIRG-2) Program. The objective of these workshops was to develop a consensus in handling difficult analytical problems in leak-before-break and pipe flaw evaluations. The workshops, which were held August 5, 1993, March 4, 1994, and October 21, 1994 at Columbus, Ohio, involved various technical presentations on the related research efforts by the IPIRG-2 member organizations and solutions to several round-robin problems. Following review by the IPIRG-2 members, four sets of round-robin problems were developed. They involved: (1) evaluations of fracture properties and pipe loads, (2) crack-opening and leak-rate evaluations, (3) dynamic analysis of cracked pipes, and (4) evaluations of elbows. A total of 18 organizations from the United States, Japan, Korea, and Europe solved these round-robin problems. The analysis techniques employed by the participants included both finite element and engineering methods. Based on the results from these analyses, several important observations were made concerning the predictive capability of the current fracture-mechanics and thermal-hydraulics models for their applications in nuclear piping and piping welds.

Cracking

Evaluation

Fracture mechanics

Pipelines

Residual stresses

Details

Title: Subtitle: Summary of results from the IPIRG-2 round-robin analysis
Creators: Sharif Rahman
R Olson
A Rosenfield
G Wilkowski
U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research.Division of Engineering Technology
Resource Type: Report
Series: NUREG/CR
DOI: 10.2172/197842
Publisher: Division of Engineering Technology, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission :Supt. of Docs., U.S. G.P.O. [distributor]; Washington, DC
Number of pages: 1 v. (various pagings)
Language: English
Date published: 02/2026
Academic Unit: Mechanical Engineering
Record Identifier: 9984201541202771

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