Download concrete structures.

IAEA Meeting
Vienna
29.05-01.06 2012
Assessment of management
of ageing of major nuclear
power plant components
important to safety:
concrete structures.
Bakirov Murat
(Russia)
VITALITY OF PROJECT
Vitality is high, because:
1) IAEA-TECDOC-1025 was made in 1998, when practical experience of
PLEX were not exist. (And now such experience is accumulate and
continue to building up)
2) Containment, confainment, main reactor building are important
barrier of safety. (Fucusima accident shows that in situation of serious
disaster containment was the last and the most important barrier)
3) Now absence of unify approach (methodology) to estimate condition
of confainment building after project lifetime. (It’s nessessary to make it
like it was made for equipment of NPP’s)
VITALITY OF PROJECT
4) Depth understanding of mechanism of ageing will be base of
knowledge for modernization of reactor buildings for new NPP projects.
(Satisfaction of new high level requirements)
5) Examination of modern methods and procedures of inspection and
monitoring technics for reinforced concrete structures. (Recommendation
to select the most effective non-destructive testing methods and also
periodicity of control and places of control)
6) Analysis of failure, distress and repair of concrete structures. (
Recommendation to maintenance and additional calculations and
experiments.)
7) Choosing the most effective calculation models of analysis of a
reinforced concrete containment on account of project (non-project)
accidents. (Earthquake, rapture of main pipes and destroying of pressure
vessel, optimization of tension of steel-rope )
NAME OF DOCUMENT?
Assessment and management of ageing of major
nuclear power plant components importing to
safety: concrete containment buildings or
concrete structures?
Our aim is to extend our document?
We not only describe containment buildings but also reactor
building, turbine hole and middle building?
Classification of nuclear reactor types in common use.
WWER reactors in operation – two major types
WWER – 440 designs (V-179, V-230, V-213 )
Confainment area
Cross section of WWER-1000 V-320
Containment building
Previous materials
Previous materials received from scientific secretary IAEA
J. Moore /K. Kang is very good starting base summarized
previous experience in that field (based on IAEA techdoc).
Probable contents based on original publication of TECDOC1052, -1400 and others materials of IAEA, including my
personal opinion.
Contence
1) Introduction (TECDOC-1025)
2) Concrete containment building (TECDOC-1025)
3) Failure mechanisms in concrete
3.1 Causes and mechanisms of deterioration in reinforced
concrete
1 Microstructure and role of environment in concrete
deterioration
2 Physically induced deterioration (freeze, effect of salt,
porosity, erosion)
3 Chemically induced deterioration (carbonation, corrosion
of steel reinforcement.
Contence
3.2 Types of concrete damage
1 Causes and mechanisms of concrete damage
2 Chemical attack
3 Fire
4 Static overloading
5 Impact (local dynamic effect)
6 Earthquake (the seismic load is not a local effect)
7 Pressure impact
8 ???
3.3 Types and causes of cracking in concrete structures
1 Cracking in plastic stage
2 Cracking after hardening
3 Assessment of distressed concrete
4 Fatigue cracking
Contence
3.4 Conditional assessment of concrete structure
1 Introduction in evaluation of concrete structures –
overview
2 Methodologies to assessment concrete structure
according to feature of concrete containment building
3 Stages of concrete assessment (documentation review, in
situ non distructive and distructive testing
4 Development of sampling plan
5 Development of a testing program
6 FEM calculation
7 Evaluation of test results and calculation results and
engeneering analysis
8 Proposals to mitigation of ageing effect (repair)
3.5 Evolution technic and test methodology
… joint with HUGE important part 4
3.6 Laboratory testing
3.7 Load testing of construction
5) Understanding and detecting ageing
6) Assessment and repairing ageing effect
7) Concrete containment building ageing management
programme (to all types of reactors)
8) Conclusion and recomindation
Part 4 Testing methods for reinforced concrete
Building NPPs (destructive testing-DT,non-destructive
NDT, minor destructive testing MDT)
INTODUCTIN
PRINCIPLES
MEASUREMENT METHODS
WHEN USE
HOW TO INTERPRET THE MEASUREMENT VALUES
PRACTICAL APPLICATION
NEW TECHNIGUES
COMBINATION OF TESTING METHODS
FUTURE TRENDS
SELECTED EXAMPLES OF EFFECTIVE AND INNOVATION MONITORING TECHNOLOGIES
References
(thise chapter in finish of)
I’m sure that our
future activity is
going to be fruitful