Proceedings Vol. 17 (2011)
ENGINEERING MECHANICS 2011
May 9 – 12, 2011, Svratka, Czech Republic
Copyright © 2011 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)
list of papers scientific commitee
pages 459 - 462, full text
Specific feature of the nuclear power plants is in comparison with coal fired plants the break postulation of each high energy piping. Fluid system is considered as high-energy piping if the maximum operating temperature exceeds 100°C and the maximum operating pressure exceeds 2MPa. Based on the progress of the linear fracture mechanics US NRC approved deterministic „leak before break“ methodology. If the defined requirements are met, the break postulation may be canceled. The first step is the assessment of the through wall critical length lcrit. Using the Simulation Based Reliability Analysis approach all uncertainties in the input data of lcrit are in the paper analyzed and the related probability of pipe failure is predicted.
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