Risk-Based Allowed Outage Time and Surveillance Test Interval Extensions for Angra 1

Table 4

Test of the redundant train pump.

Test of the redundant train pump	Pump A: commence of AOT	Pump B: test is performed right before entering AOT	Pump C: test is performed right before entering AOT	Modifications on pump common-cause failure to start probabilities
Two- or three-component system	𝑄FS→1 (true)	𝑄^′FS=𝑄FS/4; 𝑄MA→0 (false)	𝑄^′FS=QFS/4; 𝑄MC→0 (false)	𝑄^′CCFS=𝑄CCFS/4
	𝑄FR→1 (true)
	𝑄MA→1 (true)