WASH-1400 – The Reactor Safety Study – The Introduction of Risk Assessment to the Regulation of Nuclear Reactors (NUREG/KM-0010)

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Publication Information

Manuscript Completed: August 2016
Date Published: August 2016

Prepared by:
Reynold Bartel

Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Availability Notice


This NUREG incorporates information from the November 9, 2015, presentation titled "WASH-1400 and the Origins of Probabilistic Risk Assessment in the Nuclear Industry," by Drs. Thomas Wellock and Robert Budnitz, at the U.S. Nuclear Regulatory Commission (NRC) Headquarters in Rockville, MD. Felix Gonzalez and Dr. Nathan Siu from the Office of Nuclear Regulatory Research and Christine Steger, a member of the knowledge management staff in the Office of the Chief Human Capital Officer, who had the vision to produce this program in support of the NRC's Knowledge Management Program. A video of the lecture is available (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15348A211). The intended audience for this NUREG is anyone who has an interest in either the technical topic or the history of the use of risk analysis tools at the NRC. The lecture on November 9 featured both historical knowledge from Dr. Wellock and primary source information from Dr. Budnitz, who participated in the review of WASH-1400 in the mid 1970s. For completeness, the preparer expanded on the material presented on November 9 to ensure sufficient context for readers who may not be familiar with the topic.

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