Product & Service Directory–2014
9
Operators in the control room of Unit 5 (VVER-1000).
quality assurance program and project
schedule.
Stage 1 of the project includes
preparation of technical documentation
for comprehensive assessment of systems,
structures and components (SSCs) on
Units 5&6. Stage2of theproject envisages
preparation of the methodology for
comprehensive assessment of the residual
lifetime. Furthermore, a timeline was set
for project implementation:
Incorporation of results and
preparation of a Lifetime Extension
Program – to be completed by the
end of 2013 (Unit 5) andMarch 2014
(Unit 6);
Presenting a Programfor Preparation
of Lifetime Extension to the Nuclear
RegulatoryAgency– tobe completed
by the spring of 2014;
Approval of the Program by the
Nuclear Regulatory Agency by June
2014 (Unit 5) and October 2014
(Unit 6).
The comprehensive assessment
includes several important steps:
Analysisofsystems,structures,hydro-
technical equipment anddetermining
major (critical) components subject
to assessment;
Assessment of the most important
mechanisms with effect on aging and
degradationof critical components, as
well as preparing methodologies for
control and management of aging;
Preparation of relevant procedures
andmethodologies for assessment of
residual lifetime of main structures
and components;
Assessment of residual lifetime of
separate systems, components and
building structures;
Justification of sets of measures to
assureoperation, andmaintainquality
ofsystems,structuresandcomponents
for Units 5&6, incorporated in the
Program for Preparation of Units for
Lifetime Extension.
Based on the results of the
comprehensive assessment, a set of
measures will be planned as a minimum:
Replacement of components;
Additionalanalysisandjustificationof
residual lifetime for non-replaceable
components;
Correction in the procedures for
technical equipment, operation and
maintenance of components with
regard to extended operation.
Kozloduy NPP took into account
IAEA’s standards for aging management
for nuclear power plants as well as
requirements for reliable operation
of equipment determined in both
manufacturer’s documentation and
operational documentation.
Currently, Unit 5 is licensed by the
Nuclear Regulatory Agency, Bulgaria
for operation until 5th November 2017,
and Unit 6 is licensed by the Nuclear
Regulatory Agency for operation until
2nd October 2019. The plant goal is to
obtain a 20-year life extension. However,
legislation allows for license renewal
for maximum 10 years (2027 and 2029,
respectively). Therefore, extension of
lifetime will be achieved in two steps
in accordance with Bulgarian law. The
plant management is confident that the
vast experience accumulated during the
Modernization Program will allow for
effective and timely preparation for a
Lifetime Extension Program.
Contact: Dimitar Lazhov, Kozloduy
NPP; telephone: 359 97374070, fax: 359
97376019, email:
.
