STPA-Based Hazard and Importance Analysis on NPP Safety I&C Systems Focusing on Human–System Interactions

Sung-Min Shin, Sang Hun Lee, Seung Ki Shin, Inseok Jang and Jinkyun Park

Reliability Engineering and System Safety, 2021, vol. 213, issue C

Abstract: To ensure system safety, conducting required control actions (CAs) in time at the right place is essential. Among the CAs, safety critical ones such as reactor trip signals in a nuclear power plant are preferentially and automatically generated by the instrumentation and control (I&C) system. If necessary, however, they can also be generated manually by human operators. Even for manual CAs, though, the I&C system is still needed to convey relevant feedback to the human operators. It is therefore indispensable to analyze the risk associated with the transmission of feedback to the human operators in terms of the condition of the I&C system. In this context, System-Theoretic Process Analysis (STPA) can provide a framework to link the conditions of the I&C system with the feedback transmission for manual CA generation. Based on STPA, this study proposes a method to analyze I&C system hazards and assess the relative importance of system components in terms of human–system interactions, or more specifically, feedback transmission for manual CA generation. As a feasibility study, the method is applied to an example case requiring reactor trip signal generation in the Advanced Power Reactor 1400 (APR-1400).

Keywords: STPA; I&C; NPP; Human-system Interaction (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0951832021002349
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:213:y:2021:i:c:s0951832021002349

DOI: 10.1016/j.ress.2021.107698

Access Statistics for this article

Reliability Engineering and System Safety is currently edited by Carlos Guedes Soares

More articles in Reliability Engineering and System Safety from Elsevier
Bibliographic data for series maintained by Catherine Liu ().