Emergency and Preventive Reactor Protection Systems - Nuclear Power Plant Instrumentation and Control Systems for Safety and Security - page 315

Figure 5. SHC E&PRP in reactor control & protection systems

• Screening and galvanic isolation of input,
output and power supply circuits in each
channel using optoelectronic components;
• Usage of radial communication structure
(“point-to-point”) between the channels
which provide saving of possibility and
correctness of data transmission between
the other channels in the case of failure of
each one channel;

• Physical separation of the SHC E&PRP re-
dundant channels located in separate cabi-
nets and receiving primary power supply
from diferent sources;
• Usage of iber-optic communication lines
for data transmission between operat-
ing stand-alone component parts of SHC
E&PRP.