Quantification of Accident Sequences

This task is similar to quantification in the power PSA. However, the sources of data as well as the procedure to develop a data base may be different. 

Data for component unavailability for SLP PSA have significantly different emphases than that for the power PSA. While in the power PSA the unavailability of safety components are (often) dominated by the failures in stand-by, in SLP PSA they are clearly dominated by maintenance unavailability. Maintenance schedules and actual duration of various tests and maintenance actions need to be carefully evaluated to determine the actual equipment availability (of major systems specific POS depending on their status may be defined). For random failures, the failure rates used in the power PSA could be used (although some of the analysts argue that the random failure rates to be sued in SLP PSA shall be different that for power PSA, no conclusive evidence of such position has been demonstrated). 

Quantification of accident sequences, uncertainty and sensitivity analysis follow the same methodological approach as for the Full-Power PSA. Due to various influences, it was shown that the SLP PSA results typically have higher uncertainties. 

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Quantification of accident sequences, including uncertainty, importance and sensitivity analyses ... 

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