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 383

Figure 2. General structure of the knowledge base at NPP I&C systems

• National Standards of Ukraine (DSTU);
• State Standards of former USSR (GOST),
which are still in force;
• National Standards of Russian Federation,
Regulation of Federal Department on eco-
logical, technological and atomic supervi-
sion of Russia;

◦ Safety in diferent branches (D1
subclass);
◦ Reliability, diagnostics, testing (D2
subclass);
◦ Software (D3 subclass);
◦ Electromagnetic compatibility (D4
subclass);
◦ Quality assurance (D5 subclass);
◦ Diferent (general technical docu-
ments important for the NPP I&C
systems, but not included in the class-
es mentioned above) (D6 subclass).

• Company standards of SSTC NRS.

In addition regulatory documents are clas-
sified by a considered object according to Yas-
trebenetsky, 2004:

• Documents directly related (and only) to
the NPP I&C systems and/or their compo-
nents (class А);
• NPP safety documents that contain re-
quirements on diferent NPP systems and
elements, including the NPP I&C systems
(class B);
• Documents related to industrial (used in
diferent branches of industry) I&C sys-
tems and their components which are also
applied at NPP (class C);
• Documents, containing general technical
requirements that are also relayed to the
NPP I&C systems and their components
(class D):

It should be noted that in Chapter 1 and all
other chapters of knowledge base selection of
required data can be made by a combination of
classification features, which are specified for
objects considered in a certain chapter.
Chapter 2 contains a set of regulatory require-
ments, regulated in national and international
regulatory documents. This chapter allows per-
forming through review of definitions of the same
requirements in different regulatory documents of
Ukraine and international ones. All requirements in
knowledge base are grouped by types (for example,
requirements on reliability, on quality assurance,
on resistance to influencing factors etc.). For each
of the specified type of requirements there are