Environmental Engineering Reference
In-Depth Information
containing required data on the basis of which
expert review is made.
Expert review purpose is the assessment of
coverage and sufficiency of documents, substan-
tiating NRS during the use of NPP from the point
of possibility of granting a proper permission
(license).
Main tasks of the expert review are as follows:
ganization sends to the regulatory authority
after completion of expert review of docu-
mentation, which substantiate safety of the
NPP I&C systems at current LC stage;
• On the basis of received report, the regula-
tory authority issues a conclusion of pos-
sibility and conditions of document ap-
proval, substantiating safety, or technical
decision of operator of performing next
stage of activities. As a submitting condi-
tion it is necessary to incorporate all com-
ments given in the report (“incorporation
of comments” is intended to bring the ex-
pert review object and/or subject into com-
pliance with speciied safety requirements
or develop measures required for compen-
sation of detected discrepancies);
• Assessment of provisions of reviewed doc-
umentation for compliance with purposes
and criteria of safety and also main prin-
ciples of NRS assurance determined by
legislative and regulatory documents cur-
rently in force;
• Analysis of a nature of suggested organi-
zational and technical measures directed
to NRS assurance and also their scope and
coverage of compliance with regulatory
documents' requirements;
•
Licensing process can be terminated in a
case if a conclusion of the regulatory au-
thority contains a inal rejection of approv-
al of the submitted document;
•
Reports development of state expert review
execution, containing grounded assess-
ment of coverage and suiciency of sub-
stantiation of expert review object safety in
reviewed documentation.
•
In case of successful passing of all the ex-
pert review stages provided in the licens-
ing plan and if comments provided in the
released reports are incorporated, the regu-
latory authority agrees NPP technical deci-
sion on putting of the system into station-
ary operation.
According to Yastrebenetsky, 2002,b, Yas-
trebenetsky, 2001,f procedure of safety assessment
during licensing of modernization (reconstruction,
creation) activities of the I&C system is based on
the following premises:
General diagram of safety assessment of the
NPP I&C systems at different LC stages is given
in Table 1.
Assessment methods of compliance of the NPP
I&C systems with regulatory requirements can
be classified in the following way:
• Safety assessment is performed during the
state expert review executed by the special-
ized expert organization authorized by the
regulatory authority;
• Expert review is executed in separate stag-
es connected with system life cycle stages;
• Assessment results (experts comments
with their substantiations, conclusions and
recommendations) are given in the report
of NRS state expert review that expert or-
• Logical analysis of documents on the ver-
bal level (without any calculations or ex-
perimental checking);
• Analysis of documents with checking cal-
culations (e.g. reliability);
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