CLIP for thermal performance monitoring on EDFs PWRs : efficient MW recovering on the secondary syst

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CLIP for thermal performance monitoring on EDFs
PWRs efficient MW recovering on the secondary
system

• F. Gachon, C. Thomas, JM Favennec (EDF RD
  Branch, Chatou, France)
• E. Tournu (EDF Nuclear Generation
  St-Denis, France)

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EDFs Nuclear Power Plants

• Installed capacity 67,000 MWe
• 58 operating reactors (on 19 sites)
• 34 900 MWe (3-loopers)
• 20 1300 MWe (4-loopers)
• 4 1450 MWe (4-loopers)
• PWRs (FRA design on Westinghouse license)
• 1 new reactor being built EPR (Flamanville 3)
• Mutualization on series of similar plants a
  powerful motivation for nuclear RD projects
• SAPEC 15 M project and investment
• for enhanced safety performance of operation
• CLIP is one of SAPECs Periodic Tests mission
  to help recover MWs

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Managing Safety Performance with key Periodic
Tests need for relevant accuracy and quality
secondary side
Pturbine inlet
Eelec power
Ffeedwater flow
primary side
CLIP (MWe losses detection on sec. system)
Pneutron power calibration BIL100?RPN
Fcoolant flow rate (BIL100 RCP114)
Pon-line thermal power calibration BIL100?BILKIT
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SAPECs Safety Performance Periodic Tests (EP)

• The Safety-oriented Periodic Tests are
• BIL100 high accuracy measurement of thermal
  Power output on secondary side (between 87
  and 100 nominal power)
• RPN11/BIL100 check and re-calibration of
  external nuclear power detectors
• BILKIT/BIL100 adjustment and re-calibration of
  BILKIT on BIL100 measurement
• RCP114  primary coolant flow rate measurement
  (by means of primary-secondary heat
  balance)
• RGL4 adjustment of the position of  grey 
  control rods with electrical power measurement
• RGL102 check of rod falling time

• The Performance-oriented Periodic Tests are
• BIL100 High Accuracy Measurement of Thermal
  Power output on secondary side (between 87 and
  100 nominal power)
• BILXXX measurement of Thermal Power output on
  secondary side (between 30 and 100 nominal
  power)
• CLIP thermal performance efficiency monitoring
  on the secondary side

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SAPEC hardware architecture
Test Ressources Management
test sensors
PATERN
CLIP,
Acquisition Devices
Hewlett Packard, SOLARTRON, AOIP, SFERE....
Site Information System
Network
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SAPEC key elements, data acquisition
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CLIP in the world of SAPEC
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CLIP principle overview
2- Detailed diagnosis on components
1- Global overview
3- Detailed reports with MWe quantification and
localization

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Expected benefits with CLIP

• For a 1,000 MWe NPP
• a 1 increase in efficiency is 10 MWe additional
  power output
• 10 MWe is over 1M/year revenue
• a 10 MWe recovery in efficiency with CLIP is 30
  times cheaper than building 10 new MWs

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CLIP principle overview
Monitoring system are secondary side, reheaters
and condenser
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CLIPs main features for accurate
monitoring of thermal efficiency
accuracy of efficiency monitoring primarily
depends on

• accuracy of measurement data ( 80 specific
  test sensors)

• accuracy of modeling (heat balance model with
  accurate plant
• commissionning test data)

• accuracy of reference data used for comparison

• experience feedback and expert judgment to decide
  which faults or problems to diagnose

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CLIP CITER model of nuclear plant (secondary
system)
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CLIP CITER thermodynamical elements

Some elementary function blocks
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CLIPs main features for EDFs operators

• An autonomous and safe system
• An industrial tool
• A system based on a detailed thermodynanmic
  modeling of the secondary side
• A system providing a diagnosis of high resolution
• A system using validated data with adequate
  accuracy
• A system allowing  what if  scenarios to probe
  deeper into analysis

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CLIP global display
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CLIP Display of final results
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CLIP Display of detailed results
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CLIP Reheaters diagram
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CLIP HP reheaters diagram
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CLIP Display of detailed results
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CLIP HP/BP turbines diagram
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CLIP Display of detailed results
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CLIP Condenser diagram
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CLIPs benefits
Benefits from CLIP experience feedback 1-
Detections of MW losses are most numerous in 1-5
MWe range they generate the biggest benefits
because those losses are the most difficult to
detect with conventional means gtgt those
benefits paid very quickly for investment in the
additional instrumentation 2- Above
figure of survey data indicates that benefits are
higher when periodic CLIP test is performed more
often (once a week, typically)
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CLIPs cost/benefit main figures

• Yearly added revenue with CLIP on PWR fleet is 30
  M
• CLIP generates an added revenue of 30 times the
  cost of its operation
• Cumulated benefits up to 2006 are over 300 M
  (NPV)

• Gains in MWe in all operating phases of our
  plants
• When CLIP is installed
• Immediate detection of previous anomalies in
  plant operation
• When restarting the unit after an outage
• Rapid, optimal reconfiguration thanks to
  detection of modifications in settings
• During operation
• In-service detection of losses of MWe (drift,
  modifications in settings, appearance of
  dysfunctions, etc.)
• To optimize maintenance
• Aid in decision-making thanks to cost assessment
  of losses

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• CLIP benefits

first installation
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CLIP benefits
When restarting the unit after an outage
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CLIP benefits
During operation (1/3)
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CLIP benefits
During operation (2/3)
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CLIP benefits
During operation (3/3)
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CLIP benefits
To optimize maintenance (1/2) aid in
decision-making
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CLIP benefits
To optimize maintenance (2/2) cost-assessment
of losses related to to a maintenance operation
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