P’s & C’s

Question 1

P-4

Answer 1

Reactor Trip (2/2 per train):
Trips Main Turbine
Closes FRV & bypasses when Tave < 554˚
Blocks 10/35% dumps (A)
Seal-in SI reset
Shifts steam dumps to reactor trip mode (B)
(SSPS Train A = RTA, BYB; B = RTB, BYA)

Question 2

P-6

Answer 2

IR Permissive
> 10^-10 amps (1/2)
Permits manual blocking of SR trip and allows de-energizing the SR Hi Volts