Rod Group and Individual Control System - Nuclear Power Plant Instrumentation and Control Systems for Safety and Security - page 348

FUTURE RESEARCH DIRECTIONS

Electromagnetic disturbance emission, radi-
ated by SHC RG&IC-R operating stand-alone
component parts during their switch-on, perfor-
mance and switch-off, does not exceed the values,
set in GOST, 1991 for information engineering
equipment.
Approbation and implementation. Main
technical solutions, elements base, hardware and
software, which were intended to be used in SHC
RG&IC-R, as well as methods of validation and
testing at NPP were approved before the start of its
development - in software-hardware complexes,
developed and manufactured by RPC “Radiy”
on base of common platform (see Chapter 1),
which are successfully operated at Ukrainian
NPP power units. The compliance with applicable
safety requirements is confirmed by validation
of deliverable complete set of SHC RG&IC-R.

The diversity principle supposes execution of
emergency reactor protection command by two
different ways. One of them is execution by SHC
RG&IC, which described below. The second way
is mechanical circuit disconnection, deenergizing
all power control cabinets from alternating (base)
and direct (reserve) current power supply, by the
emergency reactor protection command.
In consequence of that, one of the directions of
future activity for rod group and individual control
systems modernization is elaboration and using
operating stand-alone item (software-hardware
complex), what assess CR drives power by di-
rect and alternating power, diagnostic of power
parameters and reliable mechanical disconnection
of main and reserve supply circuit by command
of emergency protection system and demonstrate
its compliance with safety requirements on all
stages of life cycle. Note, that “Radiy” Corpora-
tion is currently elaborating the same complex,
what can be delivered together with or separately
from SHC RG&IC.

SOLUTIONS AND
RECOMMENDATIONS

Central part of rod group and individual control
systems of WWER-1000 units was implemented
by apparatus designed and manufactured by
ŠKODA JS а.s. (Czech Republic) on the first stage
of modernization at Ukrainian NPPs. Now these
systems do not correspond to requirements in new
Ukrainian and international regulations and stan-
dards and operator- “Energoatom” Company rec-
ommended to replace them on software- hardware
complexes designed by Ukrainian organizations.
Software- hardware complexes for group
and individual control (RG&IC-R) designed
and manufactured by Research and Production
Corporation Radiy, can be recommend for this
replacement. This complex can be used not only
from modernization of operating units, but for new
units Khmelnitsky NPP 3 and 4 with increasing
number of control rods.

CONCLUSION

As an actuation system that performs functions
of emergency and preventive reactor protection,
reactor power control and unloading, and com-
mands send by the power unit operating personnel,
the rod group and individual control system and
its central part, the software-hardware complex
SHC RG&IC-R, developed by the Research and
Production Corporation Radiy, are considered.
Besides the control functions, SHC RG&IC-R
performs information functions required to support
operating personnel and additional functions such
as automatic diagnosis, notification of failures,
archiving, displaying and recording of current
and archive information.