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http://dx.doi.org/10.3795/KSME-A.2014.38.11.1257

Estimates of Partial Safety Factors of Circumferential Through-Wall Cracked Pipes Based on Elastic-Plastic Crack Initiation Criterion  

Lee, Jae-Bin (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology)
Huh, Nam-Su (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.38, no.11, 2014 , pp. 1257-1264 More about this Journal
Abstract
Efforts are presently underway for developing an optimal design methodology for GEN-IV nuclear reactors based on target failure probabilities. A typical example is the system-based code, in which the results are represented in the form of partial safety factors (PSFs). Thus, a PSF is one of the crucial elements in either component design or integrity assessment based on target failure probabilities during the operation period. In the present study, a procedure for calculating the PSF of a circumferential through-wall cracked pipe based on the elastic-plastic crack initiation criterion is established, in which the importance of each input variable is assessed. Elastic-plastic J-integrals are calculated using the GE/EPRI and reference stress methods, and the PSF values are calculated using both first- and second-order reliability methods. Moreover, the effect of statistical distributions of assessment variables on the PSF is also evaluated.
Keywords
Circumferential Through-Wall Crack; Failure Probability; Load and Resistance Factor Design; Partial Safety Factors; Second Order Reliability Method; Target Reliability;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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