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. Has lost control power
B. Was called upon to start but did not start
C. Has tripped due to an 86 lockout
D. Is in the proper position for the current actuation

Answer 1

B. Was called upon to start but did not start

Question 2

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 the alarm?

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

Answer 2

A. Loss of 580 VAC power to EWA-UV-65

Question 3

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

Answer 3

A. White light only.

Question 4

What is the power supply to SESS?

A. PN
B. NN
C. PK
D. PH

Answer 4

C. PK

Question 5

Time 0 - The 120 VAC control circuit fuse for the CS pump room essential ACU (PHA-M3533) blows.
Time 1 - An inadvertent ‘A’ Train CSAS actuates.
Assuming that the blown fuse has not been replaced, which one of the following is correct regarding the White (SEAS) and Blue (SEIS) lights on the Safety Equipment Status System ESA-UA-2A alarm panel?

A. Time 0 - White light off, Blue light on
Time 1 - White light on, Blue light on
B. Time 0 - White light on, Blue light off
Time 1 - White light on, Blue light off
C. Time 0 - White light on, Blue light off
Time 1 - White light on, Blue light on
D. Time 0 - White light off, Blue light on.
Time 1 - White light off, Blue light on.

Answer 5

C. Time 0 - White light on, Blue light off

Time 1 - White light on, Blue light on

Question 6

HPSI pump ‘A’ is out of service.
RCS Hot Leg sample valves SSA-UV-203 and SSB-UV-200 are open for chemistry sampling.
Subsequently
Unit 1 automatically trips due to a large steam line break.
4.16kv bus PBB-S04 faulted and is de-energized.
Containment pressure is 3.2 psig and increasing.
Pressurizer pressure is 1900 psia and lowering.
Pressurizer level is 24% and lowering.
Any required ESFAS signals have initiated.
The CRS has directed you to verify the RCS Hot Leg sample valves status.
Which one of the following conditions is correct?

A. Both hot leg sample will be open. No SESS lights will be initiated.
B. The ‘A’ train Hot Leg sample valves will be closed, the ‘B’ train valve will be open and the associated White SEIS lights will be illuminated for the ‘B’ train sample valve.
C. Both Hot Leg sample valves will be closed and can be opened by positioning their hand switch to close then open. A blue SEAS light will initiate when the valves are opened.
D. Both Hot Leg sample valves will be closed and can be opened by positioning their hand switch to open.

Answer 6

C. Both Hot Leg sample valves will be closed and can be opened by positioning their hand switch to close then open. A blue SEAS light will initiate when the valves are opened.

Question 7

A motor-operated ESF valve is disabled and unable to perform its function.
The valve is NOT alarm.
The impairment will last more than one shift.
In accordance with 40DP-9OP02, Conduct of Shift Operations, the operating crew will…

A. Perform and document an IV of the valve’s position.
B. Rack out the valve breaker after it has been disabled.
C. Hang a Yellow Caution Tavg on the valve’s hand switch.
D. Insert a manual SESS alarm associated with the valve.

Answer 7

D. Insert a manual SESS alarm associated with the valve.

Question 8

Unit 1 has tripped from 100% power.
Class 4160 kV bus, PBB-S04 has faulted and is de-energized.
Subsequently
SIAS/CIAS/MSIS automatically initiate .
WCA-UV-62, CHW RETURN HDR OUTSIDE CNTMT ISOL VLV, has a blue SEAS light illuminated.
(1) What is the expected status of the white SEIS and blue SEAS lights for CHW RETURN HDR INSIDE CNMT ISOL VLV, WCB-UV-61 and CHW SUPPLY HDR OUTSIDE CNTMT ISOL VLV, WCB-UV-63?
(2) What are the available means to operate WCA-UV-62 to recover Containment Integrity?

A. (1) Only the white SEIS lights are illuminated. (2) Manual Valve
B. (1) Only the white SEIS lights are illuminated. (2) Either manual operation or remote operation using WCA-HS-62
C. (1) Both the white SEIS and blue SEAS are illuminated. (2) Manual valve operation only
D. (1) Both the white SEIS and blue SEAS are illuminated. (2) Either manual operation or remote operation using WCA-HS-62

Answer 8

D. (1) Both the white SEIS and blue SEAS are illuminated. (2) Either manual operation or remote operation using WCA-HS-62