Our Projects

Relevant ongoing or recently-completed ASCA, Inc. projects are listed below.

Our Publications

August 24, 2020
Dynamic Flowgraph Methodology (DFM) Modeling of Nuclear and Advanced Technology System Risk and Reliability Scenarios

Probabilistic safety assessment (PSA) is the standard method for assess-ing and improving safety of nuclear power plants. Shutdown PSA is a version that has been developed relatively later compared to that asso-ciated with the assessment of plant power operation. Many common fea-tures and some differences exist between power PSA and shutdown PSA. The main PSA […]

January 12, 2018
Dynamic Probabilistic Risk Assessment of Unmanned Aircraft Adaptive Flight Control Systems

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 involving multiple phases with uncertain system or operational conditions. A dynamic probabilistic risk assessment scheme involving multiple phase-specific implementations of a Backtracking Process Algorithm (BPA) […]

January 13, 2017
Risk Informed Safety Case Framework for Unmanned Aircraft System Flight Software Certification

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. One of the key questions and challenges concerns the integration of UASs into the National Airspace System (NAS) and the path, criteria and processes that […]

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