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Research of Upgrading Design Proposals for the Auxiliary Power Supply Systemof Ling’ao Nuclear Station

Author: GuoMaoYu
Tutor: ZhangQinShun；QiangHui
School: Shanghai Jiaotong University
Course: Nuclear energy and nuclear science and technology
Keywords: Auxiliary power system Expansion program Technical Specification Probabilistic safety assessment methods Rehabilitation programs
CLC: TM623.7
Type: Master's thesis
Year: 2009
Downloads: 16
Quote: 0
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Abstract


The auxiliary power system of the nuclear power plant as a safe power supply , auxiliary power unit failure led switched to auxiliary power supply to the engineered safety features must be run from the main grid to ensure the safety of the reactor shutdown . The auxiliary power supply systems in the construction of the Ling Ao Nuclear Power Station (Phase II) of the original design of the auxiliary power system expansion to form by the Ling Ao Nuclear Power Station ( a ) , but the existence of the expansion program of nuclear power plant technology does not meet the specifications of the serious defects , the defects will lead to two unable to obtain charging license period , and also can not be planned grid , taking to Lingao an auxiliary power system has many issues need to be resolved through the transformation , which proposed the transformation of the two power plant auxiliary power system program . The purpose of this topic is to the transformation design review and amendment by the combination of two methods of technical analysis and probabilistic safety assessment , on the basis of technical specifications to meet nuclear safety in order to ensure the transformation design with reliability , advanced economy, and other advantages. Firstly, the role of probabilistic safety assessment methods , processes and its application status of nuclear power plants are briefly introduced , and then briefly the Ling Ao Nuclear Power Station auxiliary power system expansion program , and then combined with the interpretation of technical specifications , design principles and operation of electrical equipment maintenance experience deductive reasoning , given the conclusion of the extension option is unacceptable technical analysis , and then using probabilistic safety assessment methods are calculated and assessed , given the negative views on expansion programs related to nuclear safety risk increment , which identified the need to design and implementation of rehabilitation programs . Followed by technical analysis to select the transformation of the overall design of the program , and then the two 220KV Line transformation and 6.6KV cable switch programs subkey optimized through a combination of technical analysis and probabilistic risk assessment methods . Finally, outlined the Ling Ao Nuclear Power Station auxiliary power system transformation project 's design and engineering progress in the case , the subject research results of the application prospects carried the optimistic estimate , at the same time recommended by nuclear power plants more widely adopted probability safety assessment methods for engineering transformation program of assisted decision-making .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Power plant > Nuclear power plant (NPP ) > Operation and maintenance
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