PR S 40017

Question 1

what is a safety critical task, give an example

Answer 1

protects against a wrong side failure in a safety related asset or component. a failure of this item would have a high probability of causing an outcome with sever consequence
points lock and detection, ACDR track circuits

Question 2

what is a safety significant task,
give an example

Answer 2

protects against a wrong side failure in a safety related asset or component. failure of this item would have a medium to low probability of causing severe consequences.
Insulation resistance testing, parallel bonding