Probabilistic analysis of a two-server n -unit system subject to preventive maintenance and repair

1976 ◽  
Vol 8 (2) ◽  
pp. 249-250
Author(s):  
M. N. Gopalan ◽  
P. Venkatachalam
Keyword(s):  
Probabilistic Analysis ◽  
Preventive Maintenance ◽  
Maintenance And Repair ◽  
Unit System

Optimal preventive maintenance and repair policies for multi-state systems

2015 ◽  
Vol 140 ◽  
pp. 78-87 ◽  
Author(s):  
Shey-Huei Sheu ◽  
Chin-Chih Chang ◽  
Yen-Luan Chen ◽  
Zhe George Zhang
Keyword(s):  
Preventive Maintenance ◽  
Maintenance And Repair

Complex two-unit system with preventive maintenance

1981 ◽  
Vol 21 (4) ◽  
pp. 559-567 ◽  
Author(s):  
R Subramanian ◽  
R Natarajan ◽  
N Ravichandran
Keyword(s):  
Preventive Maintenance ◽  
Unit System

Joint Optimum Preventive-Maintenance and Repair-Limit Replacement Policies

1980 ◽  
Vol R-29 (3) ◽  
pp. 279-280 ◽  
Author(s):  
P.K. Kapur ◽  
K.R. Kapoor ◽  
D.V.S. Kapil
Keyword(s):  
Preventive Maintenance ◽  
Maintenance And Repair

Design and Development of the Enterprise Asset Management System Based on EAM

2013 ◽  
Vol 416-417 ◽  
pp. 2066-2071
Author(s):  
Guo Xiang He
Keyword(s):  
Life Cycle ◽  
Asset Management ◽  
Preventive Maintenance ◽  
Business Processes ◽  
Life Cycle Management ◽  
Maintenance And Repair ◽  
The Core ◽  
Whole Process ◽  
Repair Costs ◽  
Asset Management System

The paper describe the EAM function by proposing the main modules and major business processes, abstracting the main business processes.it implements preventive maintenance of assets, assets track, the whole process of life-cycle management based on the equipment,asset account and treat management maintenance as the core, the submission, approval,implementation of work order as main line. EAM can effectively improve the efficiency of equipment maintenance, reduce maintenance and repair costs, improve asset reliability and value.

Laser-Based Maintenance and Repair Technologies for Reactor Components

2004 ◽  
Author(s):  
Masaki Yoda ◽  
Naruhiko Mukai ◽  
Makoto Ochiai ◽  
Masataka Tamura ◽  
Satoshi Okada ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Preventive Maintenance ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Rapid Heating ◽  
Water Environment ◽  
Inspection System ◽  
Material Surface ◽  
Maintenance And Repair

Stress corrosion cracking (SCC) is the major factor to reduce the reliability of aged reactor components. Toshiba has developed various laser-based maintenance and repair technologies and applied them to existing nuclear power plants. Laser-based technology is considered to be the best tool for remote processing in nuclear power plants, and particularly so for the maintenance and repair of reactor core components. Accessibility could be drastically improved by a simple handling system owing to the absence of reactive force against laser irradiation and the flexible optical fiber. For the preventive maintenance, laser peening (LP) technology was developed and applied to reactor components in operating BWR plants. LP is a novel process to improve residual stress from tensile to compressive on material surface layer by irradiating focused high-power laser pulses in water. We have developed a fiber-delivered LP system as a preventive maintenance measure against SCC. Laser ultrasonic testing (LUT) has a great potential to be applied to the remote inspection of reactor components. Laser-induced surface acoustic wave (SAW) inspection system was developed using a compact probe with a multi-mode optical fiber and an interferometer. The developed system successfully detected a micro slit of 0.5mm depth on weld metal and heat-affected zone (HAZ). An artificial SCC was also detected by the system. We are developing a new LP system combined with LUT to treat the inner surface of bottom-mounted instruments (BMI) of PWR plants. Underwater laser seal welding (LSW) technology was also developed to apply surface crack. LSW is expected to isolate the crack tip from corrosive water environment and to stop the propagation of the crack. Rapid heating and cooling of the process minimize the heat effect, which extends the applicability to neutron-irradiated material. This paper describes recent advances in the development and application of such laser-based technologies.

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