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NRC Sources Sought: Evaluate Adequacy of Systems Theoretic Process Analysis (STPA) for Identifying Common Causes of Systematic Failures for Digital I&C (DI&C) Systems

Notice ID: APP-23-RES-0017


Current practice for the safety evaluation and analysis of digital safety systems in nuclear power plants has been challenged with increasing digitization and increasing interdependencies and interactions across systems and components. In pursuit of safety-focused performance-based approaches, the staff undertook a 2020-2021 project titled: “Investigate Use of Systems-Theoretic Accident Model and Processes (STAMP)-based Methods for Digital Nuclear Safety System Evaluation.” STAMP is a systems theory-based model framework to perform safety analysis or evaluation of designs received for certification or received with license amendment requests, and to perform causal analysis of mishaps experienced in operation.

Capabilities Sought:

  1. Subject Matter Expert (SME) must have expertise in Safety-Critical Systems Engineering, Cyber Physical Systems Engineering, Software-Dependent Systems Engineering, or Computer Science and Engineering or some combination of these disciplines, applied to Safety Critical Systems; the expertise could have been acquired through an appropriate combination of formal education (PhD preferred), research, development, or industrial experience.
  2. SME must have expertise in Systems-Theoretic Accident Model and Processes (STAMP) and STPA or a combination of STPA and equivalent methods for identifying hazards or hazardous conditions rooted in the engineering of safety critical digital systems.
  3. SME must have a minimum of 5 years of research experience in safety analysis of safety critical digital systems across multiple industries (e.g., aerospace, nuclear, transportation, medical) …

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