3.5.12

Are relevant availability requirements defined for the alarm system?

It is important that the components constituting the alarm system are fault tolerant, so that the system ensures that safety critical information always is available to the operators, both in normal operation and during emergencies. Factors to be considered include: redundant CPU, I/O and bus systems, UPS as back up to electrical/electronic equipment and redundant displays.

Comments/Recommendations

YA-711, point 9, p. 10
DC: Is independent backup of safety critical systems in the drilling module available (H2S, HC, pressure, flow rates)?