Comparison of Two Models for Damage Accumulation in Simulations of System Performance
- Idaho National Laboratory, Idaho Falls, ID (United States)
A comprehensive simulation study of system performance needs to address variations in component behavior, variations in phenomenology, and the coupling between phenomenology and component failure. This paper discusses two models of this: 1. damage accumulation is modeled as a random walk process in each time history, with component failure occurring when damage accumulation reaches a specified threshold; or 2. damage accumulation is modeled mechanistically within each time history, but failure occurs when damage reaches a time-history-specific threshold, sampled at time zero from each component’s distribution of damage tolerance. A limiting case of the latter is classical discrete-event simulation, with component failure times sampled a priori from failure time distributions; but in such models, the failure times are not typically adjusted for operating conditions varying within a time history. Nowadays, as discussed below, it is practical to account for this. The paper compares the interpretations and computational aspects of the two models mentioned above.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1367507
- Report Number(s):
- INL/CON-15-35375
- Resource Relation:
- Conference: ABRISCO 2015 and Topical PSAM Meeting on Safety and Reliability of O&G Exploration and Production, Rio de Janeiro (Brazil), 23-25 Nov 2015
- Country of Publication:
- United States
- Language:
- English
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