Energy Procedia 00 (2011)16 (2012) 153 вЂ“ 158
Energy Procedia 000вЂ“000
2012 Worldwide Conference on Future Energy, Environment, and Materials
Applications of Underwater Lazer Peening in Nuclear Electric power
Jialei Zhu*, Xiangdong Jiao, Canfeng Zhou, Hui Gao
School of Mechanical Anatomist, Beijing Institute of Petrochemical Technology, Beijing 102617, China
Pressure corrosion cracking is the significant threat for the safe and stable operation of indivisible power vegetation, and the residual tensile anxiety is the major causes. Intended for in-service indivisible power plants, the most effective means to prevent stress corrosion cracking is replace the stress status of material area by peening technology. Compared to traditional taken peening, laserlight peening provides advantages of great directionality, very good accessibility, easy to control, simply no residue, more deeply compressed part, and more suited to use in the upkeep of in-service nuclear electrical power plants. Through this paper, analysis and using underwater laser beam peening technology in indivisible power plant repair are described.
В© 2011 Published by Elsevier N. V. Collection and/or peer-review under responsibility of Foreign Materials Research Society.
В© 2011 Published by Elsevier Ltd. Variety and/or peer-review under responsibility of [name organizer] Keywords: Nuclear electric power; in-service maintenance; laser peening; underwater
1 . Introduction
You will discover more than 500 nuclear power plants in the world. It is a extremely important issue to operate them as well as stably. Stress corrosion cracking(SCC)is the major element to reduce the reliability of aged aeroplano components, which might cause unscheduled outages and reduce availability. Initiation and propagation of SCC due to three factors, which usually must be present simultaneously: metallurgical susceptibility, critical environment, and static(or sustained) tensile challenges. For elemental power plant, together with the special environment and materials, the aspect that adds SCC is definitely primarily the residual tensile tension induced by welding procedures. Mitigate or eradicate stress corrosion and SCC is the powerful means to ensure nuclear electric power plants functioning safely and stably. How to strengthen weak elements of in service * Corresponding writer. Tel.: 010-81293719; fax: 010-81293719 E-mail talk about: [email protected] com.
1876-6102 В© 2011 Posted by Elsevier B. Versus. Selection and/or peer-review beneath responsibility of International Elements Science Society. doi: 15. 1016/j. egypro. 2012. 01. 026
Jialei Zhu et al. as well as Energy Procedia 16 (2012) 153
Publisher name as well as Energy Procedia 00 (2011) 000вЂ“000 вЂ“ 158
nuclear power crops to achieve the successful maintenance can be an very worthy of concern for both economic and social rewards.
2 . Features of laser peening
With the benefits of good directionality, easy to transport and high energy density, the lazer has an significant value inside the maintenance of elemental power crops, underwater laser beam peening is one of the major applications.
Laser peening is a great emerging surface-treatment technology that has been developed in the early 1970s at Battelle Columbus Labs, It has manufactured a significant strengthen effect the moment used in aviators component, and has confirmed potential inside the device lifestyle extension, this lay a foundation due to the application inside the nuclear electricity plants.
Referralspresent the rule of lazer peening. In comparison with other peening technology, the implementation of laser peening does not create a rebound moderate and the reaction force, and enables correct remote control, consequently , it does not can be found residue that affect the usual operation, and can achieve the whole operation a few narrow or special condition area. A more crucial stage is that the effect of laser peening has a lot more merit than the ordinary means, the depth of compressive stress coating up to 4mm or more with all the surface roughness of the elements...
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