THE EFFECTS OF MAINTENANCE ACTIONS ON THE PFDavg OF SPRING OPERATED PRESSURE RELIEF VALVES
Conference
·
OSTI ID:1129735
The safety integrity level (SIL) of equipment used in safety instrumented functions is determined by the average probability of failure on demand (PFDavg) computed at the time of periodic inspection and maintenance, i.e., the time of proof testing. The computation of PFDavg is generally based solely on predictions or estimates of the assumed constant failure rate of the equipment. However, PFDavg is also affected by maintenance actions (or lack thereof) taken by the end user. This paper shows how maintenance actions can affect the PFDavg of spring operated pressure relief valves (SOPRV) and how these maintenance actions may be accounted for in the computation of the PFDavg metric. The method provides a means for quantifying the effects of changes in maintenance practices and shows how these changes impact plant safety.
- Research Organization:
- SRS
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC09-08SR22470
- OSTI ID:
- 1129735
- Report Number(s):
- SRNL-STI-2014-00148
- Country of Publication:
- United States
- Language:
- English
Similar Records
The Effects of Maintenance Actions on the PFDavg of Spring Operated Pressure Relief Valves
ESTIMATED SIL LEVELS AND RISK COMPARISONS FOR RELIEF VALVES AS A FUNCTION OF TIME-IN-SERVICE
Investigation Of Adhesion Formation In New Stainless Steel Trim Spring Operated Pressure Relief Valves
Journal Article
·
Mon Nov 30 19:00:00 EST 2015
· Journal of Pressure Vessel Technology
·
OSTI ID:1171508
ESTIMATED SIL LEVELS AND RISK COMPARISONS FOR RELIEF VALVES AS A FUNCTION OF TIME-IN-SERVICE
Conference
·
Mon Mar 26 00:00:00 EDT 2012
·
OSTI ID:1037174
Investigation Of Adhesion Formation In New Stainless Steel Trim Spring Operated Pressure Relief Valves
Conference
·
Tue Apr 16 00:00:00 EDT 2013
·
OSTI ID:1074389