Computation of conditional large early release probabilities of piping components

Research output: Book/ReportReportProfessional

Abstract

In-service inspections are applied to safety important pipe components in nuclear power plants (NPPs) to ensure their structural reliability. In risk-informed in-service inspections (RI-ISI), these inspections are planned according to risk importance of piping components. The quantitatively computed risk of a piping component combines the probability of the failure and the associated consequences. This report focuses on estimating the consequences of piping component failures. Conditional large early release probability (CLERP) is used as the consequence measure. It is demonstrated how CLERP values of piping component failures can be calculated automatically in the new RI-ISI feature of probabilistic risk assessment (PRA) software FinPSA. The RI-ISI feature enables detailed modelling of the consequences of piping component failures without complicating the PRA model itself.
Original languageEnglish
PublisherVTT Technical Research Centre of Finland
Number of pages18
Publication statusPublished - 2017
MoE publication typeD4 Published development or research report or study

Publication series

NameVTT Research Report
PublisherVTT
VolumeVTT-R-04644-17

Fingerprint

Inspection
Risk assessment
Nuclear power plants
Pipe

Keywords

  • risk-informed in-service-inspections
  • probabilistic risk assessment
  • nuclear safety
  • pipe

Cite this

Tyrväinen, T. (2017). Computation of conditional large early release probabilities of piping components. VTT Technical Research Centre of Finland. VTT Research Report, Vol.. VTT-R-04644-17
Tyrväinen, Tero. / Computation of conditional large early release probabilities of piping components. VTT Technical Research Centre of Finland, 2017. 18 p. (VTT Research Report, Vol. VTT-R-04644-17).
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author = "Tero Tyrv{\"a}inen",
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Tyrväinen, T 2017, Computation of conditional large early release probabilities of piping components. VTT Research Report, vol. VTT-R-04644-17, VTT Technical Research Centre of Finland.

Computation of conditional large early release probabilities of piping components. / Tyrväinen, Tero.

VTT Technical Research Centre of Finland, 2017. 18 p. (VTT Research Report, Vol. VTT-R-04644-17).

Research output: Book/ReportReportProfessional

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Tyrväinen T. Computation of conditional large early release probabilities of piping components. VTT Technical Research Centre of Finland, 2017. 18 p. (VTT Research Report, Vol. VTT-R-04644-17).