Lu,
If flying worries you that much, I presume that you also don't drive; a much more hazardous sport (especially in Quebec!).
I would imagine that the reliability of the components of any ejection system (not just rotor seperation charges) would need to be 1. It is, after all, the last resort, and failure of the system is likely to lead to a Pk of 1. <img src="eek.gif" border="0">