High Quality Content by WIKIPEDIA articles! NUREG-1150 ("Severe Accident Risks: An Assessment for Five U.S. Nuclear Power Plants", 1991, by the Nuclear Regulatory Commission [NRC]) is an improvement on WASH-1400 and CRAC-II using the results of plant-specific Probabilistic Risk Assessments (PRAs). It determined that the current generation of nuclear power plants exceeds NRC safety goals. "This study was a significant turning point in the use of risk-based concepts in the regulatory process and enabled the NRC to greatly improve its methods for assessing containment performance after core damage and accident progression." However significant, and sometimes unrealistic, conservatisms were applied in this study and it is (as of 2006) being replaced with a new state-of-the-art study entitled State-of-the-Art Reactor Consequence Analyses(see below).

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