Environmental Engineering Reference
In-Depth Information
operating systems of the reactor compartment -
DPU1; normal operating systems of the turbine
department - DPU5.
The 1E insulators developed by Westinghouse
are used to connect the DPU2-DPU4 with signal
sources of the safety systems, and also to connect
the DPU1 to signal sources of safety class 2 in nor-
mal operating systems of the reactor compartment.
In order to organize digital communication
channels with associated systems, industrial per-
sonal computers are used that are built in cabinets
of the communication servers.
Approximately 700 parameters arrive directly
from the sensors and about 1400 through the digi-
tal data transmission channels from the existing
computer information system.
Redundancy (duplication) of individual most
important blocks and combining the execution of
functions of certain functional components (serv-
ers) in devices of the same station is provided.
The structure of the system and hardware de-
vices used offer the possibility of its expansion
in the future by means of: increasing productivity
and expanding the functional capabilities with the
introduction of additional personal workstations
and functional service of the SPDS in connection
with autonomy of each of the station, which is
assured by the modular structure of the system
and use of the “client-server” concept; increas-
ing the productivity of individual stations of the
network by replacement of processors with more
productive ones, building up the on-line memory,
connection of additional magnetic and optical
disks and peripheral devices; connection to the
Westnet bus of additional sources of incoming data
by using communication devices with the object
from the WDPF set of equipment; use of widely
disseminated commercial software products (Sun
OS/C/Ethernet open windows); combining several
Westnet networks in a single system.
A general view of the SPDS at the main control
room is given in Figure 3.
Software
Software can be classified in the following manner
based on its level of approval: standard software
WDPF-II developed previously by Westinghouse,
approved for different projects, including nuclear
power plants; previously developed commercial
systems software of other foreign developers;
software created for the first time especially for
SPDS.
One particular feature of SPDS is the presence
of a software server (EWS/SS200), which stores
a standard reference set of all programs. Loading
Figure 3. General view of the SPDS at the main control room
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