Probabilistic safety assessment (PSA) is the standard method for assessing and improving safety of nuclear power plants. Shutdown PSA is a version that has been developed relatively later compared to…
There is a great demand for risk assessment tools and techniques that can ensure safe and robust performance of an Unmanned Aircraft System (UAS) equipped with adaptive elements in missions…
The rapid growth in availability and use of Unmanned Aircraft Systems (UAS) brings with it safety questions and significant challenges to the Federal Aviation Administration (FAA) and the aviation community.…
This paper discusses ASCA’s experience in applying the Dynamic Flowgraph Methodology (DFM) to a space propulsion system problem specified by the Idaho National Laboratory (INL). This problem serves as a…
Probabilistic Risk Assessment (PRA) is a comprehensive, structured, and logical analysis method aimed at identifying and assessing risks in complex technological systems for the purpose of cost-effectively improving their safety…
This paper discusses ASCA’s experience in applying the Dynamic Flowgraph Methodology (DFM) to a space propulsion system problem specified by the Idaho National Laboratory (INL). This problem serves as a…
Two dynamic methodologies, dynamic flowgraph methodology (DFM) and the Markov/Cell-tocell mapping technique (CCMT), are implemented on the benchmark Digital Feedwater Control System (DFWCS) specified in NUREG-6942, "Dynamic Reliability Modeling of Digital…
There is an accelerating trend to upgrade and replace nuclear power plant analog instrumentation and control systems with digital systems. While various methodologies are available for the reliability modeling of…
