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NUREG-1150 Internal Event Frequencies

Operator error probabilities were estimated using NUREG/CR-4910 normalized to errors determined in the internal events analysis. This allowed for varying number of personnel, amount of time available, and stress level. When more pessimistic values were substituted for best estimate values, the calculated core melt frequency increased by a factor of at least three. [Pg.419]

D.M. Ericson, Analysis of Core Damage Frequency Internal Events Methodology, Jr., et al,. NUREG/CR-4550, Vol. 1., January 1990... [Pg.117]

The internal-event core damage frequency distributions from NUREG-1150 are included as Figure 2.6-6. The bars in Figure 2.6-6 show the 90 percent uncertainty ranges along with the mean and median values. The interpretation of these uncertainty bars will be discussed further in Section 2.6.9. [Pg.189]

To characterize uncertainty, analysts use a distribution of possible values and discuss each risk measure in terms of the mean, median, and various percentiles of its distribution. For exan ple, the internal-event core damage frequencies from the NRC NUREG-1150 risk assessment of five plants are shown in Figure... [Pg.199]

Figure 4.2-2 Frequency of early containment failure or bypass (internal events from NUREG-1150)... Figure 4.2-2 Frequency of early containment failure or bypass (internal events from NUREG-1150)...
T. A. Wheeler et al., Analysis of Core Damage Frequency From Internal Events Expert Judgment Elicitation, NUREG/CR-4550, SAND86-2084, Vol. 2, 1989. [Pg.509]

Analysis of Core Damage Frequency from Internal Events Peach Bottom Unit 2. Science Applications International Corp, NUREG/CR 550, Vol. 4, US Nuclear Regulatory Commission (1986)... [Pg.440]


See other pages where NUREG-1150 Internal Event Frequencies is mentioned: [Pg.336]    [Pg.190]    [Pg.225]    [Pg.225]    [Pg.183]    [Pg.397]   


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