**6. References**


Switching. in Proc. International Conference on Power Systems Transients, Sep. 28-Oct. 2, 2003.: 1-6


20 Nuclear Power – Practical Aspects

BIL Basic Impulse Level CB Circuit Breaker DG Diesel Generator DS Disconnect Switch DTT Direct Transfer Trip EHV Extra-High-Voltage GIL Gas-Insulated Line GIS Gas-Insulated Substation

HV High Voltage LV Low Voltage MV Medium Voltage NPP Nuclear Power Plant

**Author details** 

Chang-Hsing Lee

**Acknowledgements** 

valuable comments on this work.

Delivery 2011, Vol. 26, No. 2: 1008-1016.

Shi-Lin Chen

**6. References** 

1-7.

VFTO Very Fast Transient Overvoltage

*EE Dep. of National Tsing Hua University, Hsinchu, Taiwan* 

*EE Dep. of Chung Yuan Christian University, Chung Li, Taiwan* 

The authors wish to thank Professor He Zhao, Advisor to China Electric Power Research Institute, and Dr. Edward Hsi, EE Department, Chung Yuan Christian University, for their

[1] Lee C. H., Hsu S. C., Hsi P. H., Chen S. L. Transferring of VFTO from EHV to MV System as Observed in Taiwan's No. 3 Nuclear Power Plant. in IEEE Trans. Power

[2] Jakel W., Muller A. B. Switching Transient Levels Relevant to Medium Voltage Switchgear and Associated Instrumentation. in Proc. International Conference and

[3] Buesch W., Marmonier J., Palmieri G., Chuniaud O., Miesch M. GIS Instrument Transformers: EMC Conformity Tests for a Reliable Operation in an Upgraded Substation. in Proc. Conference on Electric Power Supply Industry, Oct. 23-27, 2000.:

[4] Uglesic I., Hutter S., Milardic V., Ivankovic I., and Filiovic-Grcic B. Electromagnetic Disturbances of the Secondary Circuits in Gas Insulated Substation due to Disconnector

Exhibition on ElectroMagnetic Compatibility, June 12-13, 1999.: 35-40.

**Abbrevious** 


[22] Ji L. Y., Huang W. H., Zhang Z. Y., Shi W. Analysis and Simulation of Conducted Interference in Three-Phase in One tank GIS. in Proc. 2009 Second Asia-Pacific Conference on Computational Intelligence and Industrial Applications.: 269-299.

**Chapter 2** 

© 2012 Burgazzi, licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use,

distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 Burgazzi, licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

In order to tackle the development of advanced nuclear technologies, the reliability of passive systems has become an important subject and area under discussion, for their extensive use in new and advanced nuclear power plants, (NEA, 2002), in combination with

Following the IAEA definitions, [1], a passive component does not need any external input or energy to operate and it relies only upon natural physical laws (e.g. gravity, natural convection, conduction, etc.) and/or on inherent characteristics (properties of materials, internally stored energy, etc.) and/or 'intelligent' use of the energy that is inherently

The term "passive" identifies a system which is composed entirely of passive components and structures or a system which uses active components in a very limited way to initiate subsequent passive operation. That is why passive systems are expected to combine among others, the advantages of simplicity, a decrease in the need for human interaction and a reduction or avoidance of external electrical power or signals. These attractions may lead to increased safety and acceptability of nuclear power generation if the detractions can be

Besides the open feedback on economic competitiveness, special aspects like lack of data on some phenomena, missing operating experience over the wide range of conditions, and driving forces which are smaller - in most cases - than in active safety systems, must be taken into account: the less effective performance as compared to active safety systems has a

**Reliability of Passive** 

Luciano Burgazzi

**1. Introduction** 

reduced.

http://dx.doi.org/10.5772/47862

active safety or operational systems.

**Systems in Nuclear Power Plants** 

available in the system (e.g. decay heat, chemical reactions etc.).

strong impact on the reliability assessment of passive safety systems.

A categorisation has been developed by the IAEA in [1] distinguishing:

Additional information is available at the end of the chapter

[23] Lee C. H. Simulation and Analysis of The Very Fast Transient Overvoltage in Medium Voltage Systems. Ph. D Thesis, National Tsing Hua University, Taiwan: 2011.
