General Provisions - Nuclear Power Plant Instrumentation and Control Systems for Safety and Security - page 24

• Generate alarming messages in cabinet of
normal operation failures and detection of
defects and failures of lower level cabinets.
• Archive, display and recording or techno-
logical information, input and output sig-
nals, commands and diagnostic messages.
• Maintain human-machine interface.

The main elements of aggregation during
assembling of WULKAN-based SHC are sub-
complexes, designed as independently operated
devices in on-floor or wall hanging cabinets,
tables, and crates:

• Sub-complexes of data acquisition and

processing on DPU platform, contained in
equipment family WDPF-II. RADIY PLATFORM-based SHC and I&C

systems are described in the next chapters.
WULKAN - equipment family, intended for use
in I&C systems, is a Ukrainian version of West-
inghouse Distributed Process Family (WDPF-II)
of Westinghouse Electric Company.
Manufacturing and supply are performed in the
form of complete SHCs (with integrated system
and application software) or as a base part of
SHC (with system software, which composition
is determined by contract). In the second case
application software is developed by third-party
organization and integrated with a base part SHC.
Under control of system software, in real time
SHC performs the following main functions (in-
cluding the possibility of redundancy):

• Sub-complexes of workstations on the

base of industrial computers of Sun
Microsystems, Inc. (USA).

• Sub-complexes of hubs.

Sub-complexes have variable composition
and are assembled from a set of technical means,
included in equipment family WULKAN: mod-
ules for transformation of continuous and discrete
signals; galvanic separation devices; controllers
of local networks Ethernet, RS-485, Westnet-ΙΙ
Plus Data Highway; magnetic and optical disc
storages; monitors, keyboards, printers, etc. Dur-
ing supply of complete SHC, composition of each
sub-complex is determined by performed func-
tions, number and type of input and output signals,
necessity of redundancy and other requirements.
During supply of base part of SHC, composition
of each sub-complex is specified by the customer
directly in a contract. Combination both electric
and fiber-optic cables can be used.
On the platform WDPF-II software-hardware
complex for computer information system in
South-Ukrainian NPP unit 1(Afanasiev, 2002)
was designed and manufactured, which then was
integrated with safety parameters display system
(Anikanov, 2003). Similar by purpose and per-
formed functions SHCs were designed on the plat-
form WULKAN and implemented by Ukrainian
corporation “Westron” (Belohin, 2007) in other
Ukrainian units. Software-hardware complexes

• Reception and output of electric analog

and discrete signals.

• Reception and execution of commands of

operating personnel.

• Exchange of messages with other SHCs

and / or I&C systems via digital communi-
cation channels.

• Processing, archiving, display and record-

ing of current and archived data.

Auxiliary functions provide continuous
monitoring of technical state of SHC, output of
diagnostic messages, hardware access monitoring,
reception and output of standard time signals (if
necessary).