External accidents of natural origin

Chapters 15 and 16 discuss accidents resulting from earthquakes and tornadoes. Protection against floods has to be considered in the choice and the improvement of a site usually, no possible flood water is permitted to reach the level of the station, whose elevation is frequently raised by an embankment. Obviously, the choice of a site includes the study of the possible collapse of nearby dams and of the consequent flood waves. 

Other possible events are much more specific in nature (oscillations of lakes due to earthquakes or to wind, sand storms, volcanic eruptions, etc.) and must be studied on the merits of the local conditions. 

Bourgeois, J., Tanguy, P., Cogne, F. and Petit, J. (1996) La Surete Nucleaire en France et dans le Monde. Polyteehniea, Paris. 

Petrangeli, G. (1967) Factors involved in the evaluation of the maximum credible boron release from the core surfaces of a PWR with chemical shim , Euratom, EUR 3609 e. 

US Code of Federal Regulations (2004) Part 50.46 Acceptance Criteria for Emergency Cooling Systems for Light Water Nuclear Power Reactors , US Government. 

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