Diversity and Multi-Version Systems - Nuclear Power Plant Instrumentation and Control Systems for Safety and Security - page 213

Figure 31. GMB-A diversity assessment results of the MVP-1 - MVP-5

Figure 32. NUREG-A diversity assessment results of two-version I&C systems (examples taken from
(NUREG/CR-7007, 2009) and RadICS-based)

• Check-list-based analysis of applicable

diversity types (CLD); initial data for the
CLD analysis are I&C design and docu-
mentation, a table of diversity types (sub-
types) was developed in advance; a result of
the CLD analysis is a formalized structured
information about used diversity types and
subtypes in analyzed I&C system.

• MAD; initial data for the MAD procedure
are results of the CLD analysis and values
of metrics and weight coeicients for di-
versity types (subtypes) used in I&C sys-
tems; a result of the MAD assessment is a
value of general diversity metric.

• RBD and MM-based assessment taking

into account results of MAD.