324-325 / 1143
Summary
From this table it can be seen that when the
implementation of the proof test coverage is
accurately applied to this high-pressure protection
system, the calculated risk reduction provided
decreases by a factor of 1.97.
In certain
circumstances, the potential
impact may be
significant to the end-user.
As discussed earlier,
the unrevealed
failures will
accumulate over
time
causing an increase in PFD
AVG
over
time until
revealed by an actual
demand
on the SIF or during overhaul at the mission time.