Environmental Engineering Reference
In-Depth Information
•
MVP-3:
Diversity is implemented by ap-
plication of diferent strategies (MP and
FPGA) and others.
•
MVP-4:
Diversity is implemented by ap-
plication of diferent strategies (MP and
FPGA), processes and others.
•
MVP-5:
Diversity is implemented by
application digital (FPGA) and analog
technologies.
RadICS-based I&C system, Radiy) are illustrated
in the Figures 32 and 33 correspondingly. Results
of the GMB-A diversity assessment of FPGA-
based I&C are shown in the Figure 34.
Results of diversity assessment techniques
comparison:
Results of a comparative analysis of
NUREG-A, CLB-A and GMB-A techniques are
shown in the Table 8. NUREG-A technique is
more general. CLB-A and GMB-A techniques are
detailed to evaluate the actual diversity level of a
MVS. Results of assessing a few I&C systems
using the techniques are consistent (the same
priority row).
One of systems (main or diverse) of two-version
I&C systems for analysed MVP-1, MVP-5 is
based on the RadICS platform. Results of MP-1
- MP-5 assessing by use of NUREG-A and GMB-
A techniques are shown in the Figures 29 - 31
(ID - total indicator of diversity calculated by use
NUREG-A technique, HS-core - ID for hardware/
software core of I&C system). Acceptable value of
the diversity is defined by NUREG-A as ID = 1.
Besides, results of diversity assessment using
these techniques for four I&C systems (PWR,
DAS, AWTS which were described in (NUREG/
CR-7007, 2009) and a variant of two-version
ASSESSMENT OF MULTI-VERSION
FPGA-BASED SYSTEMS SAFETY
General Approach to Assessment
Assessment of a diversity level and MVS safety is
based on the following basic procedures analysis
and evaluation:
Figure 30. Graphical illustrations of NUREG-A diversity assessment results of the MVP-1 - MVP-5
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