Probabilistic safety assessment of components

Probabilistic safety assessment of components

Obviously, precautions against damage of components by operational and exceptional loads have to be taken. This is performed according to the procedures and standards of the nuclear regulations, e.g. by using the strength and fracture mechanical parameters (warranty parameters) of the involved mater...

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Bibliographic Details
Published in:The International journal of pressure vessels and piping Vol. 88; no. 1; pp. 19 - 25
Main Authors: Roos, E., Wackenhut, G., Lammert, R., Schuler, X.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 2011
Elsevier
Subjects:
Applied sciences
Exact sciences and technology
Failure
FORM
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Integrity
Limit state function
Mathematical analysis
Mechanical engineering. Machine design
Partial safety factors
Physics
Precautions
Probabilistic fracture mechanics
Probability of failure
Proving
R6-method
Scatter
Solid mechanics
SORM
Steel design
Steel tanks and pressure vessels; boiler manufacturing
Structural and continuum mechanics
Uncertainty
SORM
R6-method
Probabilistic fracture mechanics
FORM
Limit state function
Partial safety factors
Probability of failure
Uncertainty
Probabilistic approach
Rupture
Pressure vessel
Modeling
Safety factor
Uncertain system
Welded joint
Safety
Reliability
Damaging
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Summary:Obviously, precautions against damage of components by operational and exceptional loads have to be taken. This is performed according to the procedures and standards of the nuclear regulations, e.g. by using the strength and fracture mechanical parameters (warranty parameters) of the involved materials. Within this integrity proof by calculation, however, the effects of the uncertainties in the input parameters cannot be evaluated quantitatively. By considering the possible parameter scatter in the geometrical dimensions and loads while performing the integrity proof, the failure probabilities, and hence the caused uncertainties, become quantifiable. In addition, postulated flaw sizes can be considered and the effects of operational measures can be evaluated. This requires, on one hand, exact knowledge about the scatter of the decisive parameters, and on the other hand knowledge about their effects on the employed methods, and hence on the result of the calculation. In this paper the applied reliability theory is described. Furthermore, the failure probabilities, especially of the weld joints of a feed water line, were calculated and the available partial safety factors were analysed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0308-0161
1879-3541
DOI:10.1016/j.ijpvp.2010.11.005