Spray Flashcards
(34 cards)
The primary purpose of the Spray system is to
A. Chemically remove H2 from Ctmt atm
B.Cool the CTMT bldg during power ops
C. Limit Ctmt Bldg pressure rise after an accident
D. Limit Ctmt bldg press rise during a plant Heat Up
C. Limit the Ctmt bldg pressure rise after an accident
Which statement describes the operational design of the CTMT spray pumps
A.3 full capacity pumps rated for 2680 gpm @ 175 psia design head
B.4 half cap pumps rate for 1340 gpm @ 175 psia design head
C.2 full capacity pumps rated for 2680 gpm @175 psia design head
D. 3 half cap pumps rated for 1340 gpm @ 195 psia design head.
D. 3 half cap pumps rated for 1340 gpm @ 195 psia design head
Given the following conditions:
Large Break LOCA in ctmt
CTMT press is 17psig
Spray Pumps A and C are running (red lights on green lights off
Spray Pump B has BOTH Red and Green lights off.
All Bulbs are good
EK-1161, Spray pumps A,B,C trip is not alarming.
CRS directs the RO to start B spray pump
When RO attempts to start P-54B, the:
A. Pump will start and the Red light will come on
B.pump will start and the Red light will come on, pump will trip and green light goes on
C.Pump will remain off and green light will come on
D. Pump will remain off and Red and green lights will both remain off
D. Pump will remain off and Red and green lights will remain off.
The operating crew has entered ONP-17. Loss of SDC ATT 4 Alternating PCS/Core Heat Removal Method (PCS integrity not est) which prohibits used of Spray pumps for SDC unless the PCS is vented by the equivalent of removing an PZR manway. Why is this condition specified?
A. To ensure NPSH of the spary pumps are met
B. To prevent overpressurizing the PCS
C. To prevent overpressurizing the CS pump suction piping
D. To prevent water hammer when isolation valves are opened.
C. To prevent overpressurizing the Spray pump suction piping.
Which of the following statements describes the flow path downstream of the Spray Pumps are used for filling the SITs.
A. A SDC HX, Spray recirc line, SIT recirc line, SIT Fill and drain header
B. A SDC HX, Spray Recirc to SIRWT SF-401, SIT recirc line, SIT Fill and drain header
C. Spray pump mini flow, SIT recirc line, SIT fill and Drain header
D HPSI subcooling line, HPSI header, normal SIT fill pathc.
A. A SDC HX, Spray Recirc line, SIT recirc line, SIT fill and drain headers.
Given the following conditions:
Plant Mode 3
Tech Spec Surv test QO-1 SIS system is being performed.
The white pushbutton above the B spray pump HS comes on during the performance of the test.
Depressing the WHITE PB under these conditions will:
A, reset the stby feature of P-54B and deenergize the WHITE light
B. Start B spray pump and deenergize the white light
C. Place B spray pump in STBY condition
D. Not affect the operation of P-54B
B. Start P-54B and deenergize the white light.
Draw the spray system
Dwg
Which statement describes the purpose of the interface between spray and HPSI?
A. Spray pump is used to boost the discharge of the HPSI pump to allow injection flow sooner during a large break LOCA.
B. POST RAS a portion of the spray flow is directed to the suction of the HPSI pumps to ensure they have adequate NPSH.
C. Spray flow is used as a backup for the CCW supply to HPSI injection Pump Seal Cooling.
D. HPSI pumps can be used as a backup method of supplying spray flow in the event that spray pumps are not available.
B. POST RAS a portion of the spray flow is directed to the suction of the HPSI pumps to ensure they have adequate NPSH.
Which of the following Spray sys indications and controls are avail on Panel C-33 Redundant Safety Injection Panel? A. Flow B. Pump Control Switches C. Pump Discharge pressure D. Header Pressure.
A. Flow
Containment Spray flow can be monitored from the A. CR only B. CR and Panel C-33 C. CR and Panel C-150. D East and West Safeguards rooms.
B. CR and Panel C-33
Which of the following Spray Pump Indications and controls are NOT located on C-33. A. Spray pump handswitches. B. FI-0301B Spay flow indicator C. CV-3001 Spray valve, HS D. CV-3070, HPSI subcooling valve, HS
A. Spray pump handswitches
What is the purpose for the white light/PB located on the BKR status panels for the spray pumps.
A. The white light illuminates upon SIS, enables pump start on CHP and goes out on pump start.
B. The white light illuminates on CHP when pump starts.
C. The white light illuminated indicates the 3rd pump is in STBY and will start on Low Header pressure.
D. The white light illuminated indicates the related HPSI pump is running with is Subcooling valve open.
A. The white light illuminates upon SIS, enables pump start on CHP and goes out on pump start
Which statement describes the design feature to protect the spray pump A from runout during a RAS.
A. Rest Orif in the Spray Headers limit flow to protect from pump runout.
B. Adj Hardstops on spray header valves are set to limit flow to protect from pump runout.
C. Instaneous Overcurrent protection on the pump motor will trip in a runout cond
D. The ability to manually close the Spray Header valves even with a CHP signal will prevent runout conditions.
D. The ability to manually close the Spray Header valves even with a CHP signal will prevent runout conditions
Given the table for the following conditions.
Large break LOCA
Bus 1 D is de energized and isolated due to a fault
All avail HPSI and Spray pumps are running.
Assuming all conditions are met to est HPSI subcooling which of the following will describe the appropiate valve postioning?
3001 spray valve 3002 spray valve 3070 HPSI Subcooling P-66B 3071 Subcooling P-66A
A. OPEN OPEN CLOSED OPEN
B. OPEN CLOSED CLOSED OPEN
C. CLOSED OPEN OPEN CLOSED
D. OPEN OPEN OPEN CLOSED
A. OPEN OPEN CLOSED OPEN
Given the following conditions:
• A small break LOCA has occurred.
• SIAS has actuated.
• Containment pressure rose to 8.5 psig and has since lowered to below 2.0 psig.
• The CHP signal is reset.
• The Reactor Operator has placed the Containment Spray Pump hand switches in TRIP and
returned them to mid-position.
• The Containment Spray valves have been closed.
• SIAS has NOT been reset.
If the PCS break worsens and Containment Pressure again rises and exceeds the
Containment High Pressure setpoint, how will the Containment Spray (CS) System respond?
A. Spray valves will auto open,
Pumps must be manually started
B. Spray valves will auto open
Pumps will auto start
C. Valves must be man opened
Pumps must be manually started
D. Valves must be man opened
Pumps will auto start.
A. Spray valves will auto open,
Pumps must be manually started
• A LOCA has occurred inside Containment.
• A Recirculation Actuation Signal (RAS) has been received.
• 2400V Bus 1D equipment is operating.
• 2400 V Bus 1C is de-energized and isolated due to a fault.
• The operators are aligning for recirculation in accordance with EOP-4.0, Loss of
Coolant Accident Recovery.
Which of the following alignments would provide the MAXIMUM permissible spray flow
and subcooling flow?
A. One Spray Valve open AND ONE HPSI Subcooling valve open.
B. ONE Containment Spray Valve open and
BOTH HPSI Subcooling Valves open
C. BOTH Containment Spray Valves open and
ONE HPSI Subcooling Valve open.
D. BOTH Containment Spray Valves open and
BOTH HPSI Subcooling Valves open
A. One Spray Valve open AND ONE HPSI Subcooling valve open.
Which of the following combination of SIRWT levels will provide the required logic to
generate a Recirculation Actuation Signal (RAS)?
LS-0327 LS-0328 LS-0329 LS-0330
(LEFT CHANNEL) (RIGHT CHANNEL) (LEFT CHANNEL) (RIGHT CHANNEL)
A. 1% 5% 5% 1%
B. 1% 5% 1% 5%
C. 5% 1% 5% 1%
D. 5% 1% 5% 5%
A. 1% 5% 5% 1%
Which ONE of the following signals will automatically start P-54A, Containment Spray Pump? A. Left Channel SIAS B. Right Channel CHP C. Right Channel SIAS D. Left Channel CHP
B~ Right Channel CHP
A large break LOCA has occurred.
• RAS has actuated 1 minute ago.
• Containment Sump Control Valve, CV-3030, associated with Containment Spray
Pumps P-66B and P-66C has failed to open.
• Hand Switch HS-3001A, CHP Bypass, is in the BYPASS position.
What is the status of the following Containment Spray Valves?
CV-3070 HPSI Subcooling P-66B CV-3001 spray valve.
A. Open Closed
B. Open Open
C. Closed Open
D. Closed Closed
D. Closed Closed
• Plant was initially at 100% power when a large-break LOCA occurs
• All systems functioned as designed
• SIWR T level is currently at 6% and lowering
Assuming a Recirculation Actuation Signal (RAS) then occurs, which of the following
statements describes the effect on Containment Spray Valve CV-3001?
A. RAS will close CV-3001 if Containment Sump Valve CV-3030 does not open
B. RAS will throttle CV-3001 ifHPSI Pump P-66A is not operating
C. RAS will throttle CV-3001 ifHPSI Subcooling Valve CV-3071 does not open
D. RAS will close CV-3001 ifSIWRT Outlet Valve CV-3030 does not close
A. RAS will close CV-3001 if Containment Sump Valve CV-3030 does not open
What value of Containment pressure initiates a Containment High Pressure (CHP)? A. 3.4 psig B. 3.7 psig C. 4.0 psig D. 4.3 psig
C. 4.0 psig
Given the following plant conditions:
• Alarms EK-1167, “COMPONENT CLG PUMPS P52A, P52B, P52C TRIP” and
EK-1169, “COMPONENT CLG PUMP DISCHARGE LO PRESS” are received.
What statement DOES NOT describe an effect on the Containment Spray System?
A. Loss of Cooling to the Shutdown Cooling Heat Exchangers
B. Loss of bearing cooling for the Containment Spray Pumps.
C. Loss of seal cooling for the Containment Spray Pumps.
D. Loss of Containment Spray Pump motor cooling.
D. Loss of Containment Spray Pump motor cooling.
Consider a Large Break LOCA with a concurrent loss of CCW to Engineered
Safeguards. Which one of the following describes the effect, if any, on operation of the
Containment Spray Pumps based on cooling of the pump seals? (Assume Service
Water Backup cooling is NOT available.)
A. Can be operated as needed throughout the event with minimal effect on pump
seals.
B. Approximately 10 minutes after Safety Injection Signal occurs pump seal failure is
expected to occur.
C. Approximately 10 minutes after Recirculation Actuation Signal occurs pump seal
failure is expected to occur.
D. Cannot be operated since Service Water backup cooling is not available.
C. Approximately 10 minutes after Recirculation Actuation Signal occurs pump seal
failure is expected to occur.
A Large Break LOCA has occurred with the plant at 100% power.
- Safety Injection initiated as designed with off site power available.
- Containment High Pressure (CHP) initiated as designed.
- 40 minutes into the event the Safety Injection & Refueling Water Tank (SIRW)
level is
C. Possible lowering of Net Positive Suction Head to the HPSI Pumps
