Recent PLiM Advances for Current Operation and Long Life€¦ · Recent PLiM Advances for Current...
Transcript of Recent PLiM Advances for Current Operation and Long Life€¦ · Recent PLiM Advances for Current...
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Recent PLiM Advances for Current Operation and Long Life
R.F. Dam, S. Ayazuddin, J. Nickerson
2nd International Symposium on Nuclear Plant Life
Management, Shanghai, China, Oct 2007
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Introduction• Recent Advances:
– Consider the relationship to Equipment Reliability Programs
– Look at examples in several areas in which AECL is involved
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PLiM & Equipment Reliability• Plant Life Management
– topic of interest for 20 years.• Focus on Older Plants and Life
Extension• Evolving a broader perspective
– Maintenance Optimization & Aging Management– Long lived/short lived– Knowledge Management– Business aspects– Overall program integration
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PLiM & Equipment Reliability
PM
SHMP
EQ
ISIPIP
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PLiM & Equipment Reliability• Over the last decade: increasing focus
on an integrated approach• Equipment Reliability
– INPO AP-913, does not treat programs asindependent
– Result is to have more effective and efficient overall O&M
– Reflects a broader perspective
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Equipment Reliability
Assessment
ImplementationSurveillance &
Feedback
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Equipment Reliability
Critic
ality
Equipment Reliability
LCM
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Integrated PLiM/ER Program
Scoping and Identification of Critical SSC
Continuing ER Improvement
Implementation Long Term Planning And LCM, Corrective and Performance Monitoring
System Health & Life Cycle Manangment
ProgramsFeedback & Monitoring
ProgramsSpare Parts & Obsolescence
System/Component Long Term Aging Management PM, Surveillance & Condition Monitoring Programs
Systematic Approach to Maintenance Aging Assessment
Active Components(Maintainable/Repairable)
Passive Components(Long Lived)
Critical SSCs
ER
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Integrated PLiM/ER Program
NO
YES
CRITICALITY ANALYSIS
DETERMINATION OF
ACTIVE & PASSIVE COMPONENTS
* DETERMINATION OF DEGRADATION MECHANISMS & STRESSORS (ARDM)* REVIEW INSPECTION AND CONDITION MONITORING PROGRAM* PERFORM CONDITION ASSESSMENT
LIFE CYCLE MANAGEMENT
FEEDBACK MONITORING
PROGRAM
* DETERMINATION OF FAILURE CHARACTERISTICS (ARDM)* REVIEW MAINTENANCE STRATEGIES* PERFORM CONDITION ASSESSMENT
LONG-TERM SYSTEM / COMPONENT AGING MANAGEMENT
IDENTIFICATION OF
SPVs
SPARE PARTS
OBSOLESCENCE ISSUES
PROACTIVE AGING MANAGEMENT & OBSOLESCENCE
PROGRAM
SCOPE,SCREENING &
RANKING OF SSCs
KNOWLEDGE BASED MANAGEMENT AND AECL MAINTENANCE TEMPLATE DATABASE
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PLiM & Equipment Reliability
ComplementaryPLiM
(with a broader focus) = EquipmentReliability
How do PLiM & Equipment Reliability Relate?
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Specific Advances• Life Extension• Preventative Maintenance Program• Support Tools• Knowledge Management• Outage Frequency Enhancement• New Build Application• Design Support
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Life Extension• Life Extension
– NRU LE Program– Embalse NPP (NASA)
• NRU:– Facility Screening tailored to needs– Enhanced procedures and decision making process
– Target:� Life extension� Program enhancement during life extension
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Life Extension• Embalse:
– Detailed training in Canada and at Embalse– CNE personnel developed capability of training their own people
– Further enhanced procedures� Shared division of responsibility
– Developed aging knowledge support� Aging Related Degradation Mechanism Guidelines
• Process/Mechanical, I&C and Electrical, Civil
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Preventative Maintenance• AECL developed integrated approach
– One time assessment should provide:� Maintenance Assessment� Identify single point vulnerabilities� Define priorities� Inputs into all programs
– Be able to MAP to AP-913– Approach is “zero based approach”� Applicable when less plant experience
• Develop PM Programs for new plants• Qinshan III
– Program must continually improve
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Outage Frequency Enhancement• Taking advantage of on-line refueling• Push outage frequencies beyond 2 years
– 2 ½ to 3 years• Must be trouble free between outages
– More reliance on doing the right maintenance at the right time
• If not …..– Unplanned outages– Unmanageable outages
• PLiM thinking is needed to support
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Support Tools• AECL has developed enhancements in 3 ways:1. Improved detailed processes to increase overall assessment consistency and efficiency
2. Developed the SYSTMS tool3. Developed a knowledge management strategy that supports the assessment process • AECL Maintenance Template Database
(AMTD)
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SYSTMS™:Process control :Analysis Tracking:Functional Failure Analysis:Failure Modes & Effects Analysis:Criticality:Maintenance Strategy :Selection:Surveillance Program:Implementation Tracking:System based Adaptive Maintenance Program
Support Tools (cont)
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Support Tools (cont)• Consistent assessments
– The ability to determine important failure modes or ARDMs and what to do about them.
• Retirement of experienced experts– Exacerbates the knowledge management problem
• AECL is dealing with enhanced knowledge management activities– AMTD
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Support Tools (cont)
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Supporting the Assessment (cont)• The data within each component template is organized to include:1.Failure Modes2.Failure Causes3.Degradation Mechanisms4.Stressors5.Maintenance Tasks
• Input from AMTD used to derive ARDM guidelines–C&I, Equipment, concrete structures (Embalse)
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New Build• New plant design such as the ACR
1000– The Maintenance Based Design concept can be supported through these tools.
– More than SAM or CA can address� Many more parameters and options� The result is a combination that meets target performance
– Pilots are underway to explore the benefits and refine the process.
– Major benefit: understanding and defining the maintenance strategy required for the new plant to achieve operational goals.
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Design Support• FMECA design assist support
(FMEA = Failure Modes & Effects Criticality Analysis)– Consideration of Aging Assessment approaches reveals that there are roots in FMEA/FMECA thinking
– Same tools – same thinking – improve design– AECL has completed such an application for the AECL CANDUclean system with good success.
– Prototype adaptations to SYSTMS™ were developed for this application.
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Next Steps• Adaptive Aging Management Program–Ensure effective monitoring and experience feedback on a system as service operation continues
• AECL has tools to assist in this area–E.g. ChemAND & ThermAND
• Risk Based Inspection (RBI) is the next area of improvement–Qualitative–Quantitative
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Conclusions• PLiM has a broader focus• It meets the need of another current
focus; Equipment Reliability• Enhanced and refined processes• Establish appropriate knowledge
management foundation• Applies to newer and older plants• Applies to New Build• Applies to design
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