SESS

Question 1

Unit 3 has received a LOP on PBA-S03. The control operator notices that the Train ‘A’ Spray Pond pump has a blue SESS alarm. This alarm tells the operator that the Train A Spray Pond pump …..

A. is in the proper position for the current actuation.
B. pump has lost control power.
C. has tripped due to an 86 Lockout.
D. was called upon to start but did not start.

Answer 1

Answer: D

Question 2

With the plant at 100% power in an otherwise normal configuration, the Essential Chiller “A” breaker is opened and racked out with control power removed. What SESS indications should be expected?

A. Neither Blue nor White light.
B. Blue light only.
C. Blue and white light.
D. White light only.

Answer 2

Answer: D

Question 3

The unit is operating in Mode 1. The Train “A” ESS CLG WTR SEIS (white) window alarms (ES2A02D and 08L). Which of the following can NOT be a cause of this alarm?

A. 4160 Vac circuit breaker closing spring NOT charged.
B. EWA-P01 lockout relay actuated.
C. Loss of 480 Vac power to EWA-UV-65
D. Loss of 125 Vdc control power to the 4160 Vac supply breaker.

Answer 3

Answer: C