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PLIM - IAEA May, 14-18 2012 – Salt Lake City
Anh Tho TRAN QUANG, Ir.
Ageing nuclear plants inspection, maintenance and performance monitoring eased by Data Validation and Reconciliation (DVR) approach
Outlines
Belsim Company - Who are we?
Ageing NPP – Challenges and procedures
Data Validation & Reconciliation (DVR) - Another approach
DVR & Nuclear Power Plants - Benefits
Questions
Belsim Company – Who are we?
Leading provider of DVR software and services
More than 20 years of Industry and Technology expertise in DVR
VDI 2048 compliant
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Ageing NPP - Challenges
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Safety Human resources Economical
All actions and decisions…
…optimization
Ageing NPP - Challenges
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Safety Human resources Economical
Preventive Maintenance: Systematic…
…optimization
Ageing NPP - Challenges
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Safety Human resources Economical
Preventive Maintenance: Conditional…
…optimization
Ageing NPP - Challenges
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Safety Human resources Economical
Preventive Maintenance: Conditional…
Continuous inspection Unidentified issues Exact localization
Ageing NPP - Challenges
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Safety Human resources Economical
Preventive Maintenance: Conditional…
Continuous inspection Unidentified issues Exact localization
Plant process data enhancement Information Reliability & Availability Automated procedure
Ageing NPP – A new approach
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
RAW
RECONCILED
Data Validation & Reconciliation – THE PRINCIPLES
VARIABLES EQUATIONS
THERMODYNAMIC
RED
UN
DA
NT N
ETW
OR
K
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
OPERATOR’S KNOWLEDGE
ON SITE OBSERVATIONS
Move from individual observation to network …
MASS BALANCE ONLY
1. Sensor precision
2. Installation problems, induced biases
3. Fluctuation of the physical phenomenon itself
4. Drift or accuracy bias of the sensor itself
5. Compensation (e.g. flow meters)
6. Accuracy of the acquisition system
σ: 5%
σ: 20%
σ: 10%
MASS IMBALANCE 10 ≠ 7 + 6
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Data Validation & Reconciliation – THE PRINCIPLES
CORRECT ALL measurements
As LITTLE as possible
Using REDUNDANCY (more information than required)
*
iy iy
0),
0),
)(
*
*
2*
ji
ji
i i
ii
xyG(
xyF( to subject
y
yyMin
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
MASS IMBALANCE 10 ≠ 7 + 6
Move from individual observation to network …
σ: 5%
10.29
4.71
5.58
MASS BALANCE CLOSED 10.29 = 4.71 + 5.58
σ: 4.6%
σ: 20% σ: 14.4%
σ: 10% σ: 9.9%
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
REDUNDANT INFORMATION Independent ways of calculation
RELATED INFORMATION Interdependent Network of information
CROSS CHECK INFORMATION Most probable state of your plant
Move from individual observation to network …
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Data Validation & Reconciliation – INCOHERENCY
Global Statistical test condition
95% of measurements are within confidence interval
Individual Statistical test condition
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
Data Validation & Reconciliation – WORKFLOW
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
DVR Results – INEFFICIENCIES DETECTION
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
6 times higher than expected
DVR Results – FAULTY SENSORS DETECTION
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
8/06/10 9/06/10 10/06/10 11/06/10 12/06/10
Flo
w r
ate
[k
g/s
]
HP reheater condensate cooler flow kg/s
∆ ≈ 9 kg/s
After DP range
modification
DVR Results – SENSOR DRIFTING
Total main feedwater flow based on reconciled data
Total main feedwater flow based on raw data
kg/s
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
35
36
37
38
39
40
41
42
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
23/12/11 12/01/12 1/02/12 21/02/12
MA
SS
FLO
W T
UB
E S
ID
E [
kg
/s]
UG
LO
B [
W/
m²/
K]
DVR Results – EQUIPMENT DEGRADATION
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
DVR Results – REACTOR THERMAL POWER
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
MW
th
erm
al
Reactor thermal power based on RAW data
Reactor thermal power based on RECONCILED data
Sea water temperature
Conclusions
Automatic workflow
Early detection
Real-time access
Reliable, coherent and most accurate
Safety Human resources Economical …optimization
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
=
Thank you for your attention!
www.belsim.com or call us +(32) 4 259 88 88
BELSIM
AGEING NPP
DVR A NEW APPROACH
DVR BENEFITS PERFORM. MONIT.
TRUE PICTURE
CONCLUSION
QUESTIONS
