From the point of view of the danger of radiation impact on the environment, disturbances in the operation of nuclear power plants associated with the loss of coolant differ from all other emergency situations in that the initial event, which consists in damage to one of the safety barriers, creates a threat of destruction of all other safety barriers.
The approach to the problem under consideration can be defined as follows: what is more preferable — to stop the development of an emergency at the initial stage, preventing the operational parameters from going beyond the limits of dangerous values, or to overcome severe consequences (dehydration of the core, overheating of fuel elements and the related problem of refilling, etc.).
More detailed analysis of the passive protection system on the links
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