Cost-risk optimization of nondestructive inspection level. Technical report

Technical Report · Mon Sep 01 04:00:00 EDT 1975

OSTI ID:7331133

Johnson, D P

This paper develops a quantitative methodology for determining the nondestructive inspection (NDI) level that will result in a minimum cost product considering both type one inspection errors, acceptance of defective material units, and type two inspection errors, rejection of sound material units. This methodology represents an advance over fracture mechanics - nondestructive inspection (FM-NDI) design systems that do not consider type two inspection errors or the pre-inspection material quality. Four methods are identified for determining the flaw-frequency and three methods are identified for determining the conditional failure probability (one of these methods is probabilistic fracture mechanics). Methods for determining the rejection probability are discussed elsewhere. The NDI-FF methodology can have significant impact when the cost of failures represents a significant fraction of the manufacturing costs, or when a significant fraction of the components are being rejected. (GRA)

• Research Organization: Failure Analysis Associates, Palo Alto, Calif. (USA)
• OSTI ID: 7331133
• Report Number(s): PB-246256; FAA-75-4-9
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
COST
EFFICIENCY
INSPECTION
MATERIALS TESTING
NONDESTRUCTIVE TESTING
OPTIMIZATION
REACTOR COMPONENTS
TESTING