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DEFENCE IN DEPTH
Defence in depth: reactors

TYPES OF EVENTS: AN EVENT WITHOUT AN INITIATOR

 

This is the second type of event.

Events that don’t cause an initiator, but do involve failures in safety systems.

Such events often go unnoticed by the reactor itself, they rely on normal operation systems.

e.g.

Loss of a high pressure injection pump has no immediate impact when the reactor is operating.

However, safety is degraded, the reactor is or was at greater risk and that is what INES is measuring.