Paper Info
Title
A method for evaluating fault coverage using simulated fault injection for digitalized systems in nuclear power plants
Abstract
The fault coverage for digital system in nuclear power plants is evaluated using a simulated fault injection method. Digital systems have numerous advantages, such as hardware elements share and hardware replication of the needed number of independent channels. However, the application of digital systems to safety-critical systems in nuclear power plants has been limited due to reliability concerns. In the reliability issues, fault coverage is one of the most important factors. In this study, we propose an evaluation method of the fault coverage for safety-critical digital systems in nuclear power plants. The system under assessment is a local coincidence logic processor for a digital plant protection system at Ulchin nuclear power plant units 5 and 6. The assessed system is simplified and then a simulated fault injection method is applied to evaluate the fault coverage of two fault detection mechanisms. From the simulated fault injection experiment, the fault detection coverage of the watchdog timer is 44.2% and that of the read only memory (ROM) checksum is 50.5%. Our experiments show that the fault coverage of a safety-critical digital system is effectively quantified using the simulated fault injection method.
Year
DOI
Venue
2006
10.1016/j.ress.2005.05.002
Reliability Engineering & System Safety
Keywords
DocType
Volume
Digital plant protection system,Local coincidence logic processor,Fault coverage,Simulated fault injection,Heartbeat-watchdog timer,ROM checksum
Journal
91
Issue
ISSN
Citations 
5
0951-8320
0
PageRank 
References 
Authors
0.34
8
6
Name
Order
Citations
PageRank
Suk-Joon Kim100.34
Poong-hyun Seong211524.53
Jun Seok Lee393.03
Man Cheol Kim400.34
Hyun Gook Kang500.34
Seung-Cheol Jang652.01