Digital instrumentation and control systems (I&C) are appearing as upgrades in older nuclear power plants (NPPs) and are commonplace in new NPPs. To assess the risk of NPP operation and to determine the risk impact of digital system upgrades on NPPs, quantifiable reliability models are needed along with data for digital systems that are suitable for using in existing probabilistic safety assessments (PSA). This paper presents a methodology for the consideration of software failures of I&C systems in nuclear PSA context. Evidence of operational data of the digital system platform TELEPERMr XS (TXS) developed at AREVA GmbH is considered in the software failure probability quantification process.
|atw - International Journal for Nuclear Power
|Published - 2015
|MoE publication type
|A1 Journal article-refereed