Official Use Only

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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