Helping to solve the plant safety puzzle: An overview of PRA

September 17, 2021, 3:01PMNuclear NewsCurtis Smith, Andrew Miller, Stephen Hess, and Fernando Ferrante

Probabilistic risk assessments (PRAs) have advanced the safe operation of the U.S. reactor fleet over many decades. Risk insights from PRAs have provided information from many different perspectives, from what is most important to maintain at a facility to a better understanding of how to address new information regarding safety issues. The methods and tools that have supported the creation and enhancement of PRA models were established through multiple decades of research, starting with WASH-1400, The Reactor Safety Study,1 published in 1975, through the comprehensive plant-specific models in use today.

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