A Reliability-Centered Maintenance Study for an Individual Section Forming Machine

Okwuobi, Samuel; Ishola, Felix; Ajayi, Oluseyi O.

doi:10.20944/preprints201809.0494.v1

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…List of electric power technical supervision equipment For CPR1000 nuclear power plant with equipment classification, the equipment classification results can be referred to to improve the identification efficiency of technical supervision equipment list [5][6], and mostly can be used the Reliability Centred Maintenance (RCM) method [7][8].…”

Section: List Of Nuclear Safety Supervision Equipmentmentioning

confidence: 99%

Research and Application Practice on Technical Supervision of Nuclear Island Mechanical Equipment in NPP

Yang

Wang

2023

J. Phys.: Conf. Ser.

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The safe and reliable operation of nuclear island mechanical equipment in NPP is directly related to the stable power generation of units. Strengthening the supervision and management of nuclear island mechanical equipment is an important measure to improve its reliability. This paper presents a nuclear power plant nuclear equipment purpose and significance of electric power and technical supervision, technical supervision scope, equipment identification methods, technical supervision content build process, and the reactor coolant system main pump as an example, compiled the technical supervision guide, some CPR1000 nuclear power plant in the pilot application. The existing problems in the management of the main pump group were found, and suggestions for improvement, reliability improvement and economy improvement were put forward. The practice has proved that the technical supervision of nuclear island mechanical equipment in nuclear power plants is helpful to improve the power generation capacity and economy of nuclear power plants.

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Section: List Of Nuclear Safety Supervision Equipmentmentioning

confidence: 99%

Research and Application Practice on Technical Supervision of Nuclear Island Mechanical Equipment in NPP

Yang

Wang

2023

J. Phys.: Conf. Ser.

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New FMEA Risks Ranking Approach Utilizing Four Fuzzy Logic Systems

Ivančan¹,

Lisjak²

2021

Machines

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Process equipment and plant maintenance problems are complex in the oil refinery business, since effective maintenance needs to ensure the reliability and availability of the plant. Failure Mode and Effects Analysis (FMEA) is a risk assessment tool that aims to determine possible failure modes, and to reduce the ratio of unknown failure modes, by identifying business-critical systems and the risks of their failures. For the identified failure modes, FMEA determines risk mitigation action(s). The goal is to prevent failure and keep assets and plants running at peak performance by providing fully integrated operations, maintenance, turnarounds, modifications, and asset integrity solutions, during all phases of the asset life cycle. This research was based on FMEA use/application in refineries’ units, and proposes the new fuzzy FMEA risk quantification approach method: “four fuzzy logic system”. The model included a pre-assessment, by sets of fuzzy logic systems, that examined the input parameters that affected the variables of severity, occurrence, and detectability. The proposed model prioritized risks better and addressed the drawbacks of the conventional FMEA method.

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Reliability-Centered Preventive Maintenance Optimization for a Single-Component Mechanical Equipment

Liu,

Tang,

Wang

et al. 2023

Symmetry

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Due to the high failure rates of mechanical equipment with complex structures and numerous moving parts, devising an effective preventive maintenance (PM) plan and avoiding the influence brought by failure is crucial. However, some PM efforts are disorganized, unpractical, and unscientific, leading to prolonged downtime and significant cost losses. The challenge in creating PM plans is exacerbated by the asymmetry between maintenance and failure data. Therefore, focusing on single-unit mechanical equipment, the reliability-centered maintenance (RCM) idea is put forward to find out the key parts to implement preventive maintenance, and PM models are built to draw up a more reasonable PM plan. Such strategies aim to lower maintenance costs and enhance economic performance. Data on past maintenance and failures are analyzed to determine the life distribution and maintenance effect functions, helping to quantify the uncertainty caused by data asymmetry. Two PM optimization models considering time-varying failure rates are proposed: one focuses on minimizing costs, while the other aims to maximize availability. A PM plan example is demonstrated using a component from a tire-building machine including six parts, which proves the validity of the models. The availability results of two parts corresponding to the maintenance strategy obtained by the availability maximization model are above 0.99, and the results of total costs per unit time of the remaining four parts obtained by the cost minimization model are under 5.69.

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A Reliability-Centered Maintenance Study for an Individual Section Forming Machine

Cited by 3 publications

References 11 publications

Research and Application Practice on Technical Supervision of Nuclear Island Mechanical Equipment in NPP

Research and Application Practice on Technical Supervision of Nuclear Island Mechanical Equipment in NPP

New FMEA Risks Ranking Approach Utilizing Four Fuzzy Logic Systems

Reliability-Centered Preventive Maintenance Optimization for a Single-Component Mechanical Equipment

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