Maintenance reliability centred

The principles utilized in these expert systems are general purpose and based on failure modes, effects and critically analysis, FMECA, a sub-process of reliability centred maintenance, RCM, and statistical process control, SPC. The analysis paradigm includes ... 

Optimized preventive maintenance programmes can contribute to ensuring both safe and competitive NPPs. Reliability centered maintenance provides an optimization of preventive maintenance. The principles underlying reliability centred maintenance include preventing failures where the repercussions for the plant could be serious in terms of safety or economics. The methodology involves evaluation of the functional consequences of failure, analyses of experience feedback, and optimization of preventive maintenance tasks. Electricite de France (EdF) has implemented preventive maintenance programmes based on a reliability centred maintenance methodology at EdF nuclear plants, and results have shown benefits in safety, performance and cost. 

Moubray, J. (2000). Reliability-centred maintenance. Second edition, revision 2.3. Oxford, Butterworth-Heinemann. 

In an operational context, there is a need to adjust and optimize existing maintenance programs. In order to facilitate this, one has to be specific on failure causes and mechanisms. A Failure Mode Effect and Criticality Assessment (FMECA) module has thus been included in the RAM tool. With the FMECA module in place, the ageing and downtime modelling are further improved compared to the basic RAM model in Section 5.1. Critical failures are split into different failure modes with the related Mean Time to Failures (MTTFs) and failure causes. A description of maintenance measures is linked to each of the failure modes. Information regarding the different cost elements of maintenance and operation are registered in the maintenance-planning module, or the Reliability Centred Maintenance (RCM) module. Interval optimisation for each of the preventive maintenance tasks is derived as the interval that produces the minimum total cost. 

Central to VDMP is a method called experience-based reliability centred maintenance (EBRCM) that uses feedback data and decision logic to methodically select maintenance tasks for assets [31]. This approach utilises the internal expert and operating knowledge in collaboration with FMEA s and decision logic methods to create an updated maintenance plan that is unique to the requirements of an organisation. To complement the improvements made by a VDMP, a lifecycle analysis should be carried out before the purchase of any asset to estimate the total cost of an asset before installation. 

Laakso K, Hanninen S, Simola K (1995) Experience based reliability centred maintenance—a case study of the improvement of the maintenance programme for valve drives. Int J Manag Phys Assets, 333-350... 

NOTE The following methods may be used to determine the undetected failures that need to be tested examination of fault trees failure mode and effect analysis reliability centred maintenance. 

Another important concept in preventive maintenance is that of reliability centred maintenance (RCM). RCM is a systematic process of preserving a system s function by selecting and applying a range of preventive maintenance techniques. It differs from most approaches to preventive maintenance by focusing on function rather than equipment. In general, the concept of RCM is applicable in large and complex systems such as chemical plants, oil refineries and power stations. 

Valis, D. Vintr, Z. 2006. Vehicle Maintenance Process Optimisation Using Life Cycle Costs Data and Reliability-Centred Maintenance. Proceedings of the First International Conference on Maintenance Engineering. Beijing Sdenoe Press. ISBN 7-03-018064-X. 

Moubray, J. 1997. Reliability Centred Maintenance. 2nd ed. Oxford Butterworth-Heinemann. 

However, indirectly the Control System can also influence the value of Ki, in that features of the Control System (e.g. condition monitoring) may allow a new maintenance policy, such as reliability-centred maintenance, and thereby reduce the difference between Kq and Ki. To take this into account, we introduce the preventive maintenance factor, y, with Ki = yKo. 

Fonseca D.J. and Knapp G.M., (2000) An Expert System for Reliability Centred Maintenance in the Chemical Industry , Expert-Systems-with-Applications, Vol. 19, No. l,pp. 45-57. 

Goodfellow J.W., (2000) Applying Reliability Centred Maintenance (RCM) to Overhead Electric Utility Distribution Systems , Power Engineering Society Summer Meeting, Vol. 1, pp. 566-569. 

Hauge B.S., Stevens A.M., Loomis R.J.Jr. and Ghose A., (2000) Reliability-Centred Maintenance on the Space Shuttle Program , Proceedings of the Annual Reliability and Maintainability. Symposium, IEEE, Piscataway, NJ, USA, pp. 311-316. 

Rausand M., (1998) Reliability Centred Maintenance , Reliability-Engineering System Safety, Vol. 60, No. 2, pp. 121-132. 

Srikrishna S., Yadava G.S. and Rao P.N., (1996) Reliability-Centred Maintenance Applied to Power Plant Auxiliaries , Journal of Quality in Maintenance Engineering, Vol. 2, No. l,pp. 3-14. 

Worledge D.H., (1993) Industry Advances in Reliability Centred Maintenance , Proceedings of the European Safety and Reliability Conference (ESREL 93), Amsterdam, Netherlands, pp. 267-277. 

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