A Methodology for Evaluating the Variability in Fracture Properties of Ferritic Nuclear Pressure Vessel Steels

[+] Author and Article Information
K. E. Stahlkopf, R. E. Smith

Electric Power Research Institute, Palo Alto, California

W. L. Server, R. A. Wullaert

Fracture Control Corporation, Goleta, California

J. Pressure Vessel Technol 99(3), 470-476 (Aug 01, 1977) (7 pages) doi:10.1115/1.3454561 History: Received August 04, 1976; Online October 25, 2010


A methodology is presented upon which an effective material property design curve can be based. The methodology is a statistically developed procedure which allows appropriate confidence limits to be established. The application of this methodology is a goal of a recently completed fracture toughness program of the Electric Power Research Institute (EPRI), and the results of this program are presented in this paper. The methodology is designed to allow the formulation of a statistically based KIR (reference toughness) curve as contrasted with the present approach which is found in Appendix G, Section III, of the ASME Boiler and Pressure Vessel Code.

Copyright © 1977 by ASME
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