irsn strategy to assess a new maintenance policy 27.09.2010 / nesebar, bulgaria presented by...
TRANSCRIPT
IRSN STRATEGY TO ASSESS A NEW MAINTENANCE POLICY
27.09.2010 / Nesebar, Bulgaria
Presented by Naoëlle MATAHRI, IRSN
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CONTEXT
A competitive environment
Optimization of the maintenance strategy
Increase of the availability
High level of safety
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The selected method: AP-913 METHOD
Method developed by INPO
Objectives: Improvement of the reliability of the systems and components Improvement of the availability
Principle: analysis of the components behaviour and the operating condition
Structure: 6 equipment reliability (ER) process areas
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AP-913 representation
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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ER process area « Scoping and identifcation of critical components »
Common scoping criteria
Identify important functions
Identify critical components
Identify non-critical components
Identify run-to-failure components
Based on the impact on the safety, the availability, the radiological protection, the personnel security and the environment
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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ER process area « Continuing equipment reliability improvement »
Development and use of preventive maintenance (PM) templates
Continuing adjustments to PM task and frequency based on station and industry equipment operating experience
Documentation of the PM technical bases
Consideration of alternative maintenance strategies to ensure reliable equipment
Continuous improvement from plant staff recommendations
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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ER process area « Performance monitoring »
System performance
Component performance
Predictive trending results
Operations rounds monitoring
Monitor testing and inspection results
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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ER process area « Preventive maintenance implementation »
Preventive maintenance work
Document equipment « as found », equipment condition
Equipment condition feedback
Standard post maintenance test
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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ER process area « Corrective action »
Corrective maintenance
Cause and corrective action
Prioritization of equipment problems
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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ER process area « Life cycle management »
Long term strategy for system and component health
Prioritization of improvement activities
Integration of long term plans with the station business strategy
Continuing equipment reliability
improvement
Performance monitoring
Corrective action
Life cycle management
Scoping and identification of
critical components
Preventive maintenance
implementation
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IRSN Strategy
Analysis of the international experience feedback of the implementation and use of the method.
Experiences of some American and foreign nuclear power plants and the American documents from INPO, EPRI, NEI and others.
A large EPRI documentation about the implementation but also the operating experience feedback : recommendations, advices and good practices detected and highlighted.
A complete understanding of the method and the key points of the implementation by foreign licensees.
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IRSN Strategy
Classification :Definition of common criteria for the nuclear power plant, Choice of these criteria,Methodology to classify.
Performance criteria: Definition of these criteria, Justification of the selected performance criteria.
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IRSN Strategy
PM Template:A matrix which represents, in a synthetic way, the monitoring and maintenance actions of similar equipment, and the associated periodicities. Objective: to guarantee zero failure for the critical components.Examples of tasks in these templates :
Diagnostic task,Functional test,Major periodic maintenance,Maintenance based on the results of the diagnostic task (the
preventive maintenance will be carried out only if the diagnosis shows weak points),
Periodic routine maintenance,Periodic test…
Analysis of the content of the templates in order to guarantee the availability of the SSC important for safety.
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IRSN Strategy
Organisational change: new divisions, new competences…
Competences: To understand the physical, mechanical… phenomena, To know the behaviour and the environment condition of the SSC, To evaluate the performance of the SSC and its possible degradation, To perform predictive trending analysis.
Necessary specific trainings for the plant staff
An accompaniment on site
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IRSN Strategy
Measurement of the effectiveness of this maintenance from the safety point of view:
Maintenance performance indicators (MPI), To monitor the maintenance performance in an effective and objective way, The leading indicators for the effectiveness of the maintenance process and the lagging indicators measure results.
This mix provides a general sense of the overall performance of a maintenance programme.
IRSN performed the operational state-of-art in many countries and international organizations (IAEA, UE…). This analysis of the existing practices is performed in nuclear and non-nuclear industries.
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Conclusion
The AP-913 method: a very structured asset management method
the main purpose : the zero failure for the structures, systems and components (SSC) classified in the critical category. all the stages of components life: manufacture, supply, installation, monitoring of the performance during its use, life cycle management of the component.
The international experience feedback of the use of the method taken into account in the IRSN first assessment.