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Erroneous beliefs about nuclear safety

It is worth mentioning and discussing some beliefs prevalent in the field of nuclear safety. [Pg.239]

The opposite is true, since the probabilistic safety analyses addressing this problem have concluded that a large part of the risk of a nuclear plant is related to plant situations of shutdown or low power. A plant is shutdown for inspection and periodic maintenance, and often safety systems are disabled, the containment opened, and unusual operations are performed which decrease the usual defences, so that accidents are possible which could not happen in other conditions. [Pg.239]

In a pressurized reactor, a solid system has to be avoided by all means  [Pg.239]

A solid system , in the jargon of PWR operators, is a primary cooling system completely filled with water, that is without the steam bubble in the pressurizer. [Pg.239]

In soUd system conditions, the pressure resisting structures of the primary system are in effect exposed to undue overstressing as a compressible element in the fluid part of the system is lacking one can think of an effect of local overheating and consequent thermal expansion of the fluid, or of the start up of a high head pump connected with the primary system, etc. [Pg.239]


Chapter 27 Erroneous beliefs about nuclear safety 241... [Pg.241]


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