Analysis and Estimation of Core Damage Frequency of Flow Blockage and Loss of Coolant Accident: A Case Study of a 10 MW Water-Water Research Reactor-PSA Level 1

Table 6

System fault tree with top event “emergency core cooling system failure.”

Basic event	Components failure identification	Probability
1	Hole in hose	1.200 × 10^−4
2	Operator fails to connect hose	1.000 × 10^−2
3	Water valves fail stuck closed	3.600 × 10^−6
4	No water in the tank	1.020 × 10^−4