Probabilistic seismic hazard re-analysis in Taiwan: implication of fault-slip rates and earthquake recurrence model

In SHA, the calculation of the annul frequency of exceedance, involves the frequency of occurrence of earthquakes of various magnitude, the rupture dimension and location of the earthquakes, and the attenuation of the ground motion from the earthquake rupture to the site. Increasingly, fault slip rates are being used to constrain earthquake recurrence relationships for site-specific PSH assessment. There is evidence that the characteristics earthquake model (Young and Coppersmith model) is more appropriate for individual faults. In this study the Y-C characteristics earthquake model was used on the re-assessment of PSH analysis in Taiwan. Comparison in PSH analysis with and without the implication of fault slip rates and earthquake recurrence model was made in Taiwan area. Discussion on the sensitivity of each modal parameter on SHA was made. Basically, the component seismic design base of the nuclear power plants in Taiwan is derived through deterministic method. SHA is used in the probabilistic risk assessment (PRA) of the Lungmen project. Hence, the result will provide important information for the PRA re-evaluation of the nuclear power plants. (authors)