scholarly journals Nuclear Power Fault Diagnostics and Preventative Maintenance Optimization

2021 ◽  
Author(s):  
Cody Walker ◽  
Nancy Lybeck ◽  
Vivek Agarwal ◽  
Pradeep Ramuhalli ◽  
Mike Taylor
Keyword(s):  
Nuclear Power ◽  
Maintenance Optimization ◽  
Fault Diagnostics ◽  
Preventative Maintenance

scholarly journals An Enhanced Preventive Maintenance Optimization Model Based on a Three-Stage Failure Process

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Ruifeng Yang ◽  
Jianshe Kang ◽  
Zhenya Quan
Keyword(s):  
Optimization Model ◽  
Preventive Maintenance ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Failure Process ◽  
Maintenance Optimization ◽  
Maintenance Policy ◽  
Model Based ◽  
Inspection Interval

Nuclear power plants are highly complex systems and the issues related to their safety are of primary importance. Probabilistic safety assessment is regarded as the most widespread methodology for studying the safety of nuclear power plants. As maintenance is one of the most important factors for affecting the reliability and safety, an enhanced preventive maintenance optimization model based on a three-stage failure process is proposed. Preventive maintenance is still a dominant maintenance policy due to its easy implementation. In order to correspond to the three-color scheme commonly used in practice, the lifetime of system before failure is divided into three stages, namely, normal, minor defective, and severe defective stages. When the minor defective stage is identified, two measures are considered for comparison: one is that halving the inspection interval only when the minor defective stage is identified at the first time; the other one is that if only identifying the minor defective stage, the subsequent inspection interval is halved. Maintenance is implemented immediately once the severe defective stage is identified. Minimizing the expected cost per unit time is our objective function to optimize the inspection interval. Finally, a numerical example is presented to illustrate the effectiveness of the proposed models.

An Integrated Simulator for the Maintenance Optimization of Light Water Reactors

2006 ◽  
Author(s):  
Shinobu Yoshimura ◽  
Kazuo Furuta ◽  
Yoshihiro Isobe ◽  
Mitsuyuki Sagisaka ◽  
Michiyasu Noda ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Energy ◽  
Social Acceptance ◽  
Development Project ◽  
Maintenance Optimization ◽  
Light Water Reactors ◽  
Light Water ◽  
Piping Systems ◽  
Water Reactors

An attempt was made to develop an integrated simulator for maintenance optimization of LWRs (Light Water Reactors) based on PFM (Probabilistic Fracture Mechanics). The concept of the simulator is to provide a method to optimize maintenance activities for representative components and piping systems in nuclear power plants totally and quantitatively in terms of safety, availability and economic efficiency (both from cost and profit). The simulator will also provide a guideline regarding social acceptance of risk-based decision makings. This study has been conducted under “Innovative and Viable Nuclear Energy Technology (IVNET) Development Project” financially supported by Japanese METI.

Maintenance Optimization and Nuclear Power Plant Life Management—A Proposal for an Integrated Set of Maintenance Effectiveness Indicators

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Paolo Contri ◽  
Irina Kuzmina ◽  
Bernhard Elsing
Keyword(s):  
Electricity Markets ◽  
Nuclear Power ◽  
Power Plants ◽  
Research Centre ◽  
Energy Market ◽  
Maintenance Optimization ◽  
Joint Research ◽  
Joint Research Centre ◽  
Research Activities ◽  
Open Issues

Economic deregulation of electricity markets in many countries has placed nuclear power plants (NPPs) in a new competitive environment where capital, operating, and maintenance costs must be minimized. Optimization of the maintenance strategy, enhancement of the maintenance efficiency, and monitoring of the performance are becoming the key attributes to ensure the survival of nuclear utilities in the energy market. The Institute for Energy and Transport (IET), one of the seven scientific Institutes of the Joint Research Centre (JRC), aDirectorate General of the European Commission (EC) recognized the need to collect relevant experience and suggests a consolidated system of maintenance performance indicators (MPIs) to measure the maintenance effectiveness. This paper highlights the latest improvements of the suggested system and discusses open issues that need to be addressed in further research activities for enhancing the maintenance effectiveness of NPPs.

Maintenance Optimization of LWRs Based on PFM Analysis

2006 ◽  
Author(s):  
Shinobu Yoshimura ◽  
Kazuo Furuta ◽  
Yoshihiro Isobe ◽  
Mitsuyuki Sagisaka ◽  
Michiyasu Noda ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Social Acceptance ◽  
Evaluation Model ◽  
Development Project ◽  
Maintenance Optimization ◽  
Piping Systems ◽  
Economic Evaluation Model ◽  
Maintenance Activities ◽  
Water Reactors

We have been developing an integrated simulator for the maintenance optimization of LWRs (Light Water Reactors) based on PFM (Probabilistic Fracture Mechanics). As a typical example of the analysis, .an attempt was made to develop an economic evaluation model for the purpose of optimizing the maintenance activities of SG tubes in PWRs based on PFM approach, In the model, the probabilities of these risks were evaluated first and then the risk-benefit analysis was carried out to evaluate costs and profits as well during 60 years lifetime under various maintenance strategies. The model would be applied to pipes which are critical in terms of safety, availability and economy. The concept of the simulator is to provide a method to optimize maintenance activities for representative components and piping systems in nuclear power plants totally and quantitatively in terms of safety, availability and economic efficiency (both from cost and profit). The simulator will also provide a guideline regarding social acceptance of risk-based decision makings. This study has been conducted under “Innovative and Viable Nuclear Energy Technology (IVNET) Development Project” financially supported by Japanese METI.

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