>> You do your analysis based on individual/uncorrelated failure modes. May I introduce you to Fault Tree Analysis? NUREG 0492 https://www.nrc.gov/reading-rm

>> You do your analysis based on individual/uncorrelated failure modes. May I introduce you to Fault Tree Analysis? NUREG 0492 https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr0492/index.html https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/... One result of that is to show that there are no double failures with common cause, rather than just assuming that to be true.