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DEFENCE IN DEPTH
Defence in depth

Additional factors

 

All safety activities, whether organizational, behavioural or equipment related, are subject to layers of overlapping provisions, so that if a failure should occur it would be compensated for or corrected without causing harm to individuals or the public at large...

Basic safety principles for nuclear power plants 75-INSAG-3

This is where we started this module, looking at the 'layers of overlapping provisions'. The technology specific modules will concentrate mainly on problems of equipment. INES methodology also considers additional factors such as management, culture, training, etc.

The three aspects shown above are all part of the consideration for additional factors. The first two only really apply to facilities. Each factor is explained in turn in the pages that follow.