1200 AD-A quantitative approach to answering such questions was developed following disastrous floods in 1953, which killed nearly 2,000 people.
1960s-Bell Telephone Laboratories to address the need for evaluating missile launch control system reliability.
Shuttle program provides a more recent example of the aerospace application The National Aeronautics and Space Administration (NASA) space of QRA. U S . Nuclear Safety Development. The first use of event trees/fault trees for a major QRA in the nuclear industry was the Reactor Safety Study in 1975.
In the early 1990s, the NRC began requiring each nuclear plant licensee to conduct an Individual Plant Examination of External Events (IPEEE), which quantified the risk associated with all analyzed incidents.
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