Probabilistic Risk Assessment


This is an introductory workshop to provide developing regulatory agencies with basic knowledge about probabilistic risk assessments (PRAs). This workshop is based on the NRC P-105, “PRA Basics for Regulatory Applications” and, in general, is augmented to be applicable to internal regulators. The workshop is designed to be a start at developing PRA expertise and can be supported by a spectrum of follow-on courses.


The Probabilistic Risk Assessment (PRA) Fundamentals Workshop is a 4.5-day workshop with an integrated exercise and exam. The workshop covers PRA fundamentals and highlights associated principles, programs, applications, and quality. Students are introduced to fundamental PRA concepts including the definition of risk approaches to risk assessment (PRA and other approaches) basic PRA terminology, objectives, limitations, and strengths of PRA.

The workshop covers the basic structure of a PRA, the mathematics involved, the spectrum of inputs to PRA, sources of input information, and the PRA outputs. It provides a healthy perspective of what the outputs do and do not mean. The workshop emphasizes how to apply the outputs in harmony with the results of traditional engineering or deterministic safety assessment for responsible risk-informed decision making. The exercises are designed to encourage student interaction amongst themselves and with the instructors, in order to provide practical involvement from the basic structure level to the application level. The exam review, which includes interactive oral presentations by the students, further contributes to their developing knowledge and application of PRA.

Regulatory Staff and Management