Estimation of reactor protection system software failure probability considering undetected faults

Khalaquzzaman, M.; Lee, Seung Jun; Kim, Man Cheol; Jung, Woo‐Sik

doi:10.1016/j.nucengdes.2014.09.008

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The operation principle of four-channel digital RPS with detailed block diagrams is described in [7,11,12]. The functional requirements for the digital safety protection system are briefly discussed in [13].…”

Section: Rps Software Input-profilementioning

confidence: 99%

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Reactor protection system software test-case selection based on input-profile considering concurrent events and uncertainties

Khalaquzzaman

Lee

Cho

et al. 2015

Journal of Nuclear Science and Technology

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Recently, the input-profile-based testing for safety critical software has been proposed for determining the number of test cases and quantifying the failure probability of the software. Input-profile of a reactor protection system (RPS) software is the input which causes activation of the system for emergency shutdown of a reactor. This paper presents a method to determine the input-profile of a RPS software which considers concurrent events/transients. A deviation of a process parameter value begins through an event and increases owing to the concurrent multi-events depending on the correlation of process parameters and severity of incidents. A case of reactor trip caused by feedwater loss and main steam line break is simulated and analyzed to determine the RPS software input-profile and estimate the number of test cases. The different sizes of the main steam line breaks (e.g., small, medium, large break) with total loss of feedwater supply are considered in constructing the input-profile. The uncertainties of the simulation related to the input-profile-based software testing are also included. Our study is expected to provide an option to determine test cases and quantification of RPS software failure probability.

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Section: Rps Software Input-profilementioning

confidence: 99%

“…However, the method of converting the number of software faults into failure is unresolved. BBN method does not consider specific operating conditions of a software [6,7]. John Musa introduced the concept of operationalprofile-based software testing.…”

Section: Introductionmentioning

confidence: 99%