Organization and Information Support of Expert Reviews of I&C Systems Modernization at NPP of Ukraine - Nuclear Power Plant Instrumentation and Control Systems for Safety and Security - page 380

Table 1. Continued

LC stage of the NPP
I&C systems

Documents substantiating safety of the NPP I&C
systems at LC stages

Reports of expert review of the NPP I&C
systems

Putting the I&C systems
into stationary operation
at NPP

Technical decision for putting of modernized NPP I&C
systems into stationary operation

Report of state expert review of NRS of technical
decision for putting of modernized NPP I&C
systems into stationary operation with a package
of documents

Report of trial operation results of the NPP I&C
systems
Act and protocols of acceptance testing of the NPP I&C
systems and other materials of acceptance commission
activities
Final safety analysis report of the NPP I&C systems
Information about changes in design and operational
documentation of the NPP I&C systems according to
results of trial operation
Information about metrological certification results of
measuring channels of the NPP I&C systems

INFORMATION SUPPORT OF THE
EXPERT REVIEWS OF THE NPP
I&C SYSTEMS MODERNIZATION

• Direct participation of experts in veriica-
tion, validation, testing and acceptance of
components (on enterprise) and/or the sys-
tem (at NPP);

• Independent veriication, validation,

checking of separate components.

For information support of the expert review it
is reasonable to build a knowledge base that will
allow accumulating and systemizing and finding
different information which is required for experts
to perform safety assessment of the NPP I&C sys-
tems. Besides that a knowledge base will provide
support for other types of activities, such as the
development of regulatory documents, NPP sup-
port, research and development, international co-
operation, preparation of publications and others.
Necessity in automation of I&C systems expert
review is caused by the following factors.

The first group of methods regulated in the
regulatory document GND, 2000 has been the most
widely used till now. Recently logical analysis of
documents is more often added with checking cal-
culations (provided that experts possess required
approved methods and/or computing programs)
that increases assessment confidence.
In this topic we described only organization of
safety assessment during the expert review. More
detail description of safety assessment procedure
and different assessment methods can be found in
many other publications, for example in a series
of articles on standardization and safety assess-
ment of the NPP I&C systems (Yastrebenetsky,
2001,a-e, Yastrebenetsky, 2002,a-b, Goldrin,
2001, Kharchenko, 2002) and in other publications
(Kharchenko, 2008, Sklyar, 2006, Lindner, 2008,
Sergienko, 2008, Konorev, 2010, Miedl, 2010).

1. In Ukraine a wide-ranging implementation

of new and modernization of operated I&C
systems at NPP power units is performed (in
particular within a period from 1996 to 2012
at NPPs of Ukraine more than 250 of vari-
ous modernizations and implementations
of new I&C systems were realized and also
more than 800 expert reviews of the NPP
I&C systems) (see Table 2).