CCW Flashcards
To ensure that in the event of a Large Break LOCA the Low Pressure Safety Injection
Pump P-67A bearings and seals will be cooled adequately, which of the following is
true for the valves listed below?
CV-0913, CCW Inlet to Safeguards
CV-0950, CCW Outlet from Safeguards
These valves are normally maintained …
A. Closed to prevent seal leakage when pump is idle, but auto opens on a SIAS.
B. Closed to reduce the potential for draining CCW to the lake, but auto opens on a SIAS.
C. Open due to a single failure criteria concerns, even though they receive an open signal on a SIAS.
D. Open because they do NOT receive an open signal on a SIAS.
C. Open due to a single failure criteria concerns, even though they receive an open signal on a SIAS
The plant experienced a Safety Injection (SIAS) with loss of offsite power and the
following plant conditions exist:
• Safety Injection occurred 30 seconds ago
Offsite power in NOT available
Both Diesels are running nad loaded on the buses..
• Component Cooling Water (CCW) pump alignment prior to Safety Injection was:
o P-52A, CCW Pump, RUNNING
o P-52B and P-52C, CCW Pumps, in STANDBY
• Component Cooling Water (CCW) header pressure is presently 78 psig.
Based on the information provided select the correct response in regards to the CCW
system operation.
A. All three CCW pumps should be running.
B. CCW pumps, P-52A and P-52C should be running and P-52B will start in 10
seconds if system header pressure remains 78 psig.
C.CCW pumps, P-52A and P-52B should be running and P-52C will start in 10
seconds if system header pressure remains 78 psig.
D. CCW pumps, P-52A and P-52B should be running and P-52C will not start if system
header pressure remains 78 psig
C.CCW pumps, P-52A and P-52B should be running and P-52C will start in 10
seconds if system header pressure remains 78 psig.
What temperature indications are available in the Control Room for monitoring the
Component Cooling Water (CCW) system?
A. CCW Heat Exchanger, E54A inlet, CCW Heat Exchanger, E54B inlet, CCW Heat
Exchanger, E54A outlet and CCW Heat Exchanger, E54B outlet.
B. CCW Heat Exchanger, E54A inlet, CCW Heat Exchanger, E54B inlet, CCW
temperature inlet and outlet for Shutdown Cooling Heat Exchangers.
C. CCW Heat Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet, CCW
temperature inlet for Shutdown Cooling Heat Exchangers
D. CCW Heat Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet, CCW
temperature outlet for Shutdown Cooling Heat Exchangers
D. CCW Heat Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet, CCW
temperature outlet for Shutdown Cooling Heat Exchangers
With respect to T-3, CCW Surge Tank, which ONE of the following best describes
available Control Room indications and controls?
A. CV-0918, Surge Tk Makeup Valve position indicating lights, handswitch HS-0918,
and L1A-0920, Surge Tk (T-3) level.
B. CV-0915, Surge Tk Vent Valve position indicating lights, handswitch HS-0915, and
L1A-0917, Surge Tk (T-3) level.
C. CV-0915, Surge Tk Vent Valve position indicating lights, L1A-0917, Surge Tk (T-3)
level, and L1A-0920, Surge Tk (T-3) level.
D. CV-0915, Surge Tk Vent Valve position indicating lights, handswitch HS-0915, and
L1A-0920, Surge Tk (T-3) level.
C. CV-0915, Surge Tk Vent Valve position indicating lights, L1A-0917, Surge Tk (T-3)
level, and L1A-0920, Surge Tk (T-3) level.
What temperature indications are available in the Control Room for monitoring the
Component Cooling Water (CCW) System?
A. CCW Heat Exchanger, E54A inlet, CCW Heat Exchanger, E54B inlet, CCW Heat
Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet.
B. CCW Heat Exchanger, E54A inlet, CCW Heat Exchanger, E54B inlet, CCW
temperature inlet and outlet for Shutdown Cooling Heat Exchangers.
C. CCW Heat Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet, CCW
temperature inlet for Shutdown Cooling Heat Exchangers.
D. CCW Heat Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet, CCW
temperature outlet for Shutdown Cooling Heat Exchangers.
D. CCW Heat Exchanger, E54A outlet, CCW Heat Exchanger, E54B outlet, CCW
temperature outlet for Shutdown Cooling Heat Exchangers
With the plant at full power, an intersystem LOCA occurs in the Primary Coolant Pump
Seal Cooler. A moment later the following valid alarm annunciates:
• EK-1365, PROCESS L1Q MONITORING HI RADIATION
Which one of the following describes the expected indication for CCW Surge Tank
Vent, CV-0915, and CCW Surge Tank Makeup Valve, CV-0918?
A. CV-0915 lined up to the Vent Gas Collection Header (VGCH).
CV-0918 closed.
B. CV-0915 lined up to the Vent Gas Collection Header (VGCH).
CV-0918 open.
C. CV-0915 lined up to the Waste Gas Surge Tank.
CV-0918 closed.
D. CV-0915 lined up to the Waste Gas Surge Tank.
CV-0918 open.
A. CV-0915 lined up to the Vent Gas Collection Header (VGCH).
The following plant conditions exists:
• Reactor power is 100%
• No Equipment out of service
During an I&C surveillance for CHP signal setpoint an inadvertent CHP signal is
generated causing plant equipment to operate.
What is the effect on the CCW system as a result of this CHP signal ONLY?
A. CV-0945, “CCW Heat Exchanger E-54A Inlet” opens.
CV-0946, “CCW Heat Exchanger E-54B Inlet” opens.
B. CCW Pump P-52C trips if it was running.
CV- 0950, “Engineering Safeguards Pumps CCW Return” closes.
CV- 0944, “Cooling Water to SFP and Radwaste Evaps” closes.
C. CV-0910, “ Containment Supply Isolation” closes.
CV-0911, “Containment Return Isolation” closes.
CV-0940, “Containment Return Isolation” closes.
D. STANDBY CCW pump(s) AUTO starts.
CV-0938 “SDC Heat Exchanger E-60A/B Inlet” opens.
CV-0937 “SDC Heat Exchanger E-60A/B Inlet” opens.
C. CV-0910, “ Containment Supply Isolation” closes.
CV-0911, “Containment Return Isolation” closes.
CV-0940, “Containment Return Isolation” closes
CCW CKIO.O 002
Given the following conditions:
• The plant was operating at 30% power when a seismic event occurs.
• An SIAS (caused by a CHP) concurrent with a loss of all off-site power occurs.
• A break in the Instrument Air system has resulted in a loss of all instrument air
pressure.
• The Diesel Generators have been loaded by the DBA Sequencer.
Assuming the CCW system responded as designed, which of the following describes
the correct operation/position of the following components?
CCW Pump P-52C CV-0910, CV-0940 CV-0910
CCW Cont Ret CCW
CONT SUPPLY
A. ON OPEN CLOSED
B. ON CLOSED OPEN
C. Off, unless CCW Low Press exists/CLOSED/OPEN
D. Off unless CCW low press exists/OPEN/CLOSED
C. Off, unless CCW Low Press exists/CLOSED/OPEN
The plant experienced a Safety Injection (SIAS) with loss of offsite power and the
following plant conditions exist:
• Safety Injection occurred 30 seconds ago.
• Offsite power is NOT available.
• Both Diesel Generators are running and loaded on the busses.
• Component Cooling Water (CCW) pump alignment prior to Safety Injection was:
o P52A RUNNING
o P52B and P52C in STANDBY
• Component Cooling Water (CCW) header pressure is presently 78 psig.
Based on the information provided select the correct response in regards to the CCW
system operation.
A. All three CCW pumps should be running.
B. CCW pumps, P52A and P52C should be running and P52B would start in 10
seconds if system header pressure remains 78 psig.
C. CCW pumps, P52A and P52B should be running and P52C would start in 10
seconds if system header pressure remains 78 psig.
D. CCW pumps, P52A and P52B should be running and P52C would not start if
system header pressure remains 78 psig.
C. CCW pumps, P52A and P52B should be running and P52C would start in 10
seconds if system header pressure remains 78 psig
The plant experienced a Safety Injection (SIAS) with loss of offsite power and the
following plant conditions exist:
• Safety Injection has occurred.
• Load Shed occurred 30 seconds ago.
• Offsite power is NOT available.
• Both Diesel Generators are running and loaded on the busses.
• Component Cooling Water (CCW) pump alignment prior to Safety Injection was:
o P52A RUNNING
o P52B and P52C in STANDBY
• Component Cooling Water (CCW) header pressure is presently stable at 75 psig.
Based on the information provided select the correct response in regards to the CCW
system operation.
A. All three CCW pumps should be running.
B. CCW pumps, P52A and P52C should be running and P52B will start in 10
seconds if system header pressure remains at 75 psig.
C. CCW pumps, P52A and P52B should be running and P52C will start in 10
seconds if system header pressure remains at 75 psig.
D. CCW pumps, P52A and P52B should be running and P52C will NOT start as long
as system header pressure remains at 75 psig
C. CCW pumps, P52A and P52B should be running and P52C will start in 10
seconds if system header pressure remains at 75 psig.
The plant was initially at 100% Rx power with all systems in normal alignment. A Safety
Injection Actuation then occurred with a Loss of all Off-Site Power. Component Cooling
Water pump P-52B auto started but not Component Cooling Water pump P-52A. What
conditions must exist for Component Cooling Water pump P-52C to auto start?
A. Component Cooling Water pump P-52C will auto-start immediately.
B. Component Cooling Water pump P-52C will auto-start 40-42 seconds after the DBA
Sequencer actuates.
C. Component Cooling Water pump P-52C will auto-start immediately only if
system pressure is less than 80 psig.
D. Component Cooling Water pump P-52C will auto-start if system pressure is less
than 80 psig 40-42 seconds after the DBA sequencer actuates.
D. Component Cooling Water pump P-52C will auto-start if system pressure is less
than 80 psig 40-42 seconds after the DBA sequencer actuates
From full power a valid Safety Injection Actuation has occurred. The SIAS has NOT
been reset. Later in the accident, the operator desires to ensure that the Spent Fuel
Pool has adequate cooling.
Which one of the following system operations alone will ensure adequate cooling to the
Spent Fuel Pool under these conditions?
A. Start an additional CCW pump.
B. Start an additional SW pump.
C. Ensure control switch for CV-0944A, CCW to SFP HXs, RW Evaps, C-50’s/54 &
NSSS is selected to OPEN.
D. Ensure control switch for CV-0944A, CCW to SFP HXs, RW Evaps, C-50’s/54 &
NSSS is selected to BYPASS.
D. Ensure control switch for CV-0944A, CCW to SFP HXs, RW Evaps, C-50’s/54 &
NSSS is selected to BYPASS
CV-0945 and CV-0946, CCW Heat Exchanger Inlet Valves, receive an open signal
during emergency conditions. What condition generates the open signal and what is
the reason?
A. Safety Injection Signal (SIS). Ensures 100% cooling is available post SIS.
B. Recirculation Actuation Signal (RAS). Ensures 100% cooling is available post RAS.
C. Safety Injection Signal (SIS). Maintains minimum flow for CCW pumps.
D. Recirculation Actuation Signal (RAS). Maintains minimum flow for CCW pumps.
B. Recirculation Actuation Signal (RAS). Ensures 100% cooling is available post RAS.
Which one of the following Engineered Safeguards Features will result in a loss of
Component Cooling Water (CCW) to the Primary Coolant Pumps (PCPs), and what is
the reason for the alignment?
A.Containment High Pressure (CHP) - ensures containment building performs its
design function.
B. Containment High Radiation (CHR) - reduces radiation release potential by isolating
CCW headers.
C. Safety Injection Signal (SIS) on Low Pressurizer Pressure - Since operators will be
manually tripping PCPs for Low Pressurizer Pressure events, this provides more
cooling for SIS actuated components.
D. Safety Injection Signal (SIS) on Low Pressurizer Pressure - ensures adequate
cooling capability for the hotter containment sump water following a Large Break
LOCA, by isolating CCW to the PCPs
A.Containment High Pressure (CHP) - ensures containment building performs its
design function.
The Plant is in Mode 1 with all equipment in the normal configuration when the
following occurs:
• A loss of off-site power coincident with a Safety Injection Actuation.
• Both DIGs start and sequence loads per design.
Two minutes later, CCW Pump, P-52B, trips with a resultant CCW header pressure of
68 psig. Which one of the following describes the effect on CCW Pump, P-52C, and
the appropriate action to take?
A. Will auto start. Verify P-52C discharge pressure >115 psig.
B. Will auto start. Check for excessive loading on DIG 1-1.
C. Will NOT auto start. Manually start P-52C and ensure acceptable loading on DIG
1-1.
D. Will NOT auto start. Reduce CCW loads to avoid a runout condition on P-52A.
C¥’ Will NOT auto start. Manually start P-52C and ensure acceptable loading on DIG
1-1. c. CORRECT - The DBA sequencer will start P-52C only if pressure at the time of sequence (40 seconds)
is
Which of the following describes the Component Cooling Water interlock associated
with Primary Coolant Pump P-50A?
A. Automatically trips the PCP if CCW FLOW to the PCP integral heat exchanger
drops to less than 80 gpm, to protect PCP seals from overheating and damage
B. Automatically trips the PCP if CCW TEMPERATURE out of the integral heat
exchanger exceeds 1750 F to protect from overheating the thrust bearing
C.Prevents starting the PCP if CCW FLOW to the integral heat exchanger is less than
80 gpm to ensure adequate oil cooling capability.
D. Prevents starting the PCP if CCW PRESSURE supplied to the integral heat
exchanger is less than 80 psig to ensure adequate oil cooling capability.
C.Prevents starting the PCP if CCW FLOW to the integral heat exchanger is less than
80 gpm to ensure adequate oil cooling capability.
C) Correct, there is a start permissive associated with CCW flow to the primary
coolant pump to ensure that it is adequately cooled prior to being run to avoid
damage/failure.
The plant has been tripped and the operators are in the process of working through
EOP-4 Loss of Coolant Accident. Safety Injection has actuated and containment
pressure is 3 psig and rising, when all off-site power is lost. Following the loss of
power both Diesel Generators start and load. When the sequencers have timed out
the NCO at the controls notes that CCW P-52C is not running.
Is the response of P-52C correct and why?
A. No, the pump should have started on Safety injection
8. No, the pump should have sequenced on when power was restored
C. Yes, P-52C only starts if there is a low CCW system pressure
D. Yes, P-52C is not safety related and doesn’t get a sequencer start signal
C. Yes, P-52C only starts if there is a low CCW system pressure
C) Correct - P-52C does get a start signal but only if CCW system pressure is low.
The plant was initially at 100% Rx power with all systems in normal alignment. A Safety
Injection Actuation then occurred with a Loss of Off-Site Power. Component Cooling
Water pump P-52B auto started but not Component Cooling Water pump P-52A. What
conditions must exist for Component Cooling Water pump P-52C to auto start?
A. Component Cooling Water pump P-52C will auto-start immediately
B. Component Cooling Water pump P-52C will auto-start when the DBA Sequencer
reaches 40-42 seconds.
C. Component Cooling Water pump P-52C will auto-start immediately only if CC
system pressure is less than 80 psig.
D. Component Cooling Water pump P-52C will auto-start if CC system pressure is less
than 80 psig with DBA Sequencer at 40-42 seconds.
D. Component Cooling Water pump P-52C will auto-start if CC system pressure is less
than 80 psig with DBA Sequencer at 40-42 seconds.
The plant has been tripped and the operators are in the process of working through
EOP-4 Loss of Coolant Accident. Safety Injection has actuated and containment
pressure is 3 psig and rising, when all off-site power is lost. Following the loss of power
EDG 1-1 started and loaded, EDG 1-2 failed to start. When the sequencers have
timed out the NCO at the controls notes that CCW P52A is not running and CCW
P-52C is running.
Is the response of P-52C correct and why?
A. No, the pump should not have started on SIS or a loss of offsite power.
B. No, the pump is not safety related and doesn’t get a sequencer start signal.
C. Yes, P-52C starts if there is a low CCW system pressure.
D. Yes, P-52C starts immediately with SIS accompanied by a loss of offsite power.
C. Yes, P-52C starts if there is a low CCW system pressure
C. Correct: P-52C will get a start signal if CCW system pressure is low. With the failure of EDG 1-2 to start and the
failure of P52A, the low pressure condition pressure condition will be met
The plant has been tripped and the operators are in the process of working through
EOP-1 Standard Post Trip Actions when all off-site power is lost. Following the loss of
power both Diesel Generators start and load. When the sequencers have timed out the
NCO at the controls notes that CCW P-52C is not running.
Is the response of P-52C correct and why?
A. Yes, P-52C is not safety related and doesn’t get a sequencer start signal.
B. Yes, P-52C only starts if there is a low CCW system pressure.
C. No, the pump should have started immediately upon EDG 1-1 energizing Bus 1C.
D. No, the pump should have sequenced on when power was restored.
B. Yes, P-52C only starts if there is a low CCW system pressure.
B. Correct: P-52C starts with the NSD/DBA sequence only in conjunction with a CCW low pressure signal (from
PS-0918) to avoid unnecessary diesel loading.
A general requirement contained in SOP-16 “Component Cooling Water System”
states not to place CV-0944A (CCW to SFPHXs, RW Evaps) hand switch in BYPASS
unless directed by an approved procedure.
What is the potential consequence of placing this hand switch in BYPASS?
A. Defeats the CLOSE signal from SIAS thus diverting cooling flow from
components needed during the SIAS.
B. Causes the valve to close thus losing cooling to the SFP.
C. Causes the valve to open thus causing excess flow on the CCW pumps.
D. Defeats the OPEN signal from SIAS thus losing cooling to the SFP during the
SIAS.
A. Defeats the CLOSE signal from SIAS thus diverting cooling flow from
components needed during the SIAS.
CV- 0910, CCW supply to containment isolation valve, fails open upon loss of air to its
actuators.
What is the basis for this failure mode?
A. Ensures the valve fails in its required position for a Design Basis Accident.
B. Ensures CCW loads in containment maintain cooling during normal operations if air
is lost to the actuator.
C. Prevents a loss of DC power to the solenoid actuator from closing the valve.
D. The valve has no safety related function, therefore it has no need to ever be
closed
B. Ensures CCW loads in containment maintain cooling during normal operations if air
is lost to the actuator.
The following plant conditions exist:
• Reactor Power: 100%
• Component Cooling Water pump alignment:
o P-52B STANDBY
o P-52A and P-52C RUNNING
• A leak exists in the CCW system.
• CCW header pressure is 84 psig and stable.
• EK-1172, “COMPONENT CLG SURGE TANK LEVEL T3 HI-LO LEVEL” has
annunciated.
What is the CCW system response due to the present conditions?
A. All three CCW pumps are running due to system low pressure.
B. CV-0918 “Surge Tank T-3 Fill” is closed.
C. P-52B is blocked from starting due to CCW Surge Tank T-3 level.
D. CV-0918 “Surge Tank T-3 Fill” is open.
D. CV-0918 “Surge Tank T-3 Fill” is open.
The plant is at full power with all equipment operating normally. At 0030 hours a 5 gpm
tube leak occurs in the E-54A, Component Cooling Water Heat Exchanger. What effect
will this have on the CCW System?
A. The CCW System will be diluted by Service Water causing Sodium Nitrite
concentration to lower.
B. The CCW Surge Tank will need to be manually drained to prevent a high level.
C. CCW will flow into the Service Water System; CV-0918, CCW Surge Tank Makeup,
opens.
D. EK-1172, CCW Surge Tank Hi-La Level will annunciate due to a low level
C. CCW will flow into the Service Water System; CV-0918, CCW Surge Tank Makeup,
opens.
Given the following conditions: • The plant was operating at 100% power when an inadvertent SIAS occurred. • All systems responded as designed. • Two (2) minutes after the SIAS, EK-1172, COMPONENT CLG SURGE TANK T-3 HI-LO LEVEL, alarms. • CCW Surge Tank is 34% and lowering. Which of the following heat exchangers could be responsible for the drop in CCW Surge Tank level? A. Spent Fuel Pool Cooling HX. B. Letdown HX. C Shutdown Cooling HX. D. PCP Mechanical Seal Cooler
C Shutdown Cooling HX.
Which of the following indications ALONE can be used to verify that PCS is leaking
INTO the Component Cooling Water system.
A. CV- 0918, “Surge Tank T-3 Makeup” valve position.
B. CCW Surge Tank T-3 level indicator.
C. CCW Surge Tank T-3 Hi-Lo Level alarm.
D. CCW radiation monitor RIA-0915 high radiation reading.
D. CCW radiation monitor RIA-0915 high radiation reading.
Given the following conditions:
With the plant operating at 100% power an inadvertent SIAS caused by Pressurizer
low-low pressure occurrs.
- All systems responded as designed.
Three (3) minutes after the SIAS, EK-1172, COMPONENT CLG SURGE TANK
T-3 HI-LO LEVEL, alarms.
CCW Surge Tank is 94% and rising.
No additional failures have occurred.
A leak in which of the following heat exchanger accounts for the rise in CCW Surge
Tank level?
A. Spent Fuel Pool Cooling Heat Exchanger
B. Letdown Heat Exchanger
C. Reactor Shield Cooling Heat Exchanger
D. Shutdown Cooling Heat Exchanger
B. Letdown Heat Exchanger
B. Correct: Letdown heat exchanger is still aligned after SIAS and if leaking will raise surge tank level
With the plant in Mode 1, which one of the following CCW system conditions satisfies
immediate entry into LCO 3.0.3? Consider each case separately.
A. During an engineering review of the AUTO start logic; one (1) CCW pump is
determined to be inoperable.
B.The shell side of one CCW heat exchanger developed a leak and had to be isolated
from the header to stop the leak.
C. One train of CCW was declared inoperable 73 hours ago.
D. During testing of RIA-0915 “CCW Radiation Monitor”, it is discovered that the
CLOSE signal to the CCW Surge Tank Vent is not actuating as required.
B.The shell side of one CCW heat exchanger developed a leak and had to be isolated
from the header to stop the leak.
With the plant operating in Mode 1, which one of the following CCW system conditions
satisfies entry into LCO 3.0.3? Consider each case separately.
A. MV-SW133, SW inlet to E-54A, CCW HX is inadvertantly closed.
B. One train of CCW was declared inoperable 73 hours ago.
C.CV-0945, CCW inlet to E-54A, CCW HX fails closed and cannot be re-opened.
D. P-52A, CCW Pump is declared inoperable due to a sheared pump shaft.
C.CV-0945, CCW inlet to E-54A, CCW HX fails closed and cannot be re-opened.
The following plant conditions exist:
• Mode 4
• PCS Temperature - 2200 F
• PCS Pressure is 230 psia
• Shutdown Cooling is in service
• CCW pump P-52C is running
• CCW pump P-52A was running but tripped
• CCW pump P-52B auto started and is now running
• The CCW system pressure and temperature has returned to pre-pump trip values.
Based on the above information which, if any, Technical Specification applies?
A. No T.S. LCO applies to this condition.
B. T.S. 3.7.7.A
C. T.S. 3.7.7. C
D. T.S. 3.0.3
B~ T.S. 3.7.7.A
The following plant conditions exist:
• Mode 1
• PCS Temperature - 5600 F
• PCS Pressure - 2010 psia
• 1-2 DIG running for MO-7A2 test
• CCW pump P-52A was running but tripped
• CCW pump P-52C is now running
• CCW pump P-52B failed to auto start in STANDBY
• The CCW header pressure at 76 psig and lowering rapidly.
Based on the above information which, if any, Technical Specification applies?
A. No T.S. LCO applies to this condition.
B. T.S. 3.7. 7.A
C. T.S. 3.7.7. C
D. T.S. 3.0.3
B. T.S. 3.7. 7.A
(SRO ONLY) Technical Specification 3.7.7 “Component Cooling Water (CCW)
System” bases ensures that one CCW train in conjunction with the SWS and a 100%
capacity Containment Cooling System (containment spray, containment coolers, or a
combination) remove core decay heat between 20 to 40 minutes after a design basis
LOCA.
Complete the following:
This prevents the containment sump fluid from (1) in temperature during
the (2) phase following a LOCA, and provides a gradual
(3) in the temperature of this fluid as it is supplied to the Primary Coolant
System (PCS) by the safety injection pumps
(1) (2) (3)
A. Increasing recirculation Reduction
B. Increasing injection Reduction
C. Decreasing recirculation elevation
D. Decreasing injection reduction
A. Increasing recirculation Reduction TS 3.7.7 bases
With the plant in MODE 1, the shell side of E-54A, Component Cooling Water (CCW)
Heat Exchanger developed a leak and had to be isolated from the header to stop the
leak. How does this affect the CCW System’s ability to perform its design function, and
which guidance applies?
100% of CCW post accident cooling capability is …
A. still available. SOP-16, Component Cooling Water System, requires starting an
additional CCW pump to maintain E-54B CCW Hx differential pressure within
required limits.
B. NOT available. ONP-6.2 Attachment 1, CCW Leak Isolation, is performed to
restore required post accident cooling capability.
C. still available. Technical Specification 3.7.7, CCW System, requires that E-54A
CCW Heat Exchanger be restored to service within 72 hours.
D. NOT available. Technical Specification 3.0.3 requires initiating actions for plant
shutdown within one hour
D. NOT available. Technical Specification 3.0.3 requires initiating actions for plant
shutdown within one hour
(SRO ONLY) Which ONE of the following describes the requirements for the CCW
System as described in Technical Specification 3.7.7 Bases?
A. If the SWS side (tube side) of either CCW Heat Exchanger is out of seNice, 100%
of the required CCW post accident cooling capability cannot be assured.
B. If the SWS side (tube side) of either CCW Heat Exchanger is out of service, 100%
of the required CCW post accident cooling capability can be provided.
C. In the event of a DBA, two CCW trains are required to provide the minimum heat
removal capability assumed in the safety analysis.
D. If the CCW side (shell side) of either CCW Heat Exchanger is out of seNice, 100%
of the required CCW post accident cooling capability can be provided.
B. If the SWS side (tube side) of either CCW Heat Exchanger is out of service, 100%
of the required CCW post accident cooling capability can be provided.
T.S. 3.7.7 Bases, page B 3.7.7-7
To ensure that in the event of a Large Break LOCA the Low Pressure Safety Injection
Pump P-67A bearings and seals will be cooled adequately, which of the following is
true for the valves listed below?
CV-0913, CCW Inlet to Safeguards
CV-0950, CCW Outlet from Safeguards
These valves are normally maintained …
A. CLOSED to prevent seal leakage when pump is idle, but automatically open on a
SIAS.
B. CLOSED to reduce the potential for draining CCW to the lake, but automatically
open on a SIAS.
C.OPEN due to single failure criteria concerns, even though they receive an open
signal on a SIAS.
D. OPEN because they do NOT receive an open signal on a SIAS
C.OPEN due to single failure criteria concerns, even though they receive an open
signal on a SIAS.
c. CORRECT - Though not original plant design, this was deemed to be a
prudent feature.
The plant has been tripped and the operators are in the process of working through
EOP-1 Standard Post Trip Actions when all off-site power is lost. Following the loss of
power both Diesel Generators start and load. When the sequencers have timed out the
NCO at the controls notes that CCW P-52C is not running.
Is the response of P-52C correct and why?
A. Yes, P-52C is not safety related and doesn’t get a sequencer start signal.
B. Yes P-52C only starts if there is a low CCW system pressure.
C. No, The pump should have started immediatesly unopn EDG 1-1 energizing Bus 1C
D. No the pump should have sequenced on when power was restored.
B. Yes P-52C only starts if there is a low CCW system pressure.
Several CCW cooled components have the ability to be directly cooled by the Service
Water system if the need should arise. If the Service Water system failed which of the
components below would lose their backup cooling availability?
A. Radwaste Evaporators
B. Containment spray pumps
C. SFP Heat Exchanger
D. Charging pumps
B. Containment spray pumps
The plant has experienced a loss of offsite power and the following plant conditions
exist:
• Offsite power is NOT available.
• Component Cooling Water (CCW) pump alignment prior to the loss of offsite
power was:
• P-52B, CCW Pump, RUNNING
• P-52A and P-52C, CCW Pumps, in STANDBY
Component Cooling Water (CCW) header pressure is presently 83 psig. Both Diesel
Generators start; and the sequencer energized 30 seconds ago.
Based on the information provided select the correct response in regards to the CCW
system operation.
A. All three CCW pumps should be running
B. CCW pumps, P-52A and P-52 C should be running and P-52B will start in 10 seconds if system header pressure drops to 80 psig.
C. CCW pumps, P-52A and P-52B should be running and P-52C will start in 10 seconds
D. CCW pumps should be running and P-52C will not start if system header pressure remains 83 psig.
D. CCW pumps should be running and P-52C will not start if system header pressure remains 83 psig.
While performing a valve lineup in preparation for hanging an out of service, CV-0951
“Engineering Safeguards PP CLG SW Return” was inadvertently opened.
Which one of the following alarms and its cause would be expected due to this valving
error?
A. PROCESS LIQUID MONITORING HI RADIATION; the safeguards pump discharge
has been crosstied to CCW causing increased radiation levels.
B. WEST/EAST ROOM ENG. SAFEGUARD PPS CLG WTR LO FLOW”; opening
CV-0951 has reduced cooling water flow to the safeguard pump seals
C. COMPONENT CLG HX E54A/B HI-LO TEMP, opening CV-0951 has increased the
heat load on the CCW system
D. COMPONENT CLG SURGE TANK T-3 HI-LO LEVEL; Service water is crosstied to
CCW and CCW is pumping directly to the lake
D. COMPONENT CLG SURGE TANK T-3 HI-LO LEVEL; Service water is crosstied to
CCW and CCW is pumping directly to the lake
With the plant operating in Mode 1, which one of the following CCW system conditions
satisfies entry into LCO 3.0.3? Consider each case separately.
A. MV-SW133, SW inlet to E-54A, CCW HX is inadvertantly closed.
B. One train of CCW was declared inoperable 73 hours ago.
C. CV-0945, CCW inlet to E-54A, CCW HX fails closed and cannot be re-opened.
D. P-52A, CCW Pump is declared inoperable due to a sheared pump shaft
Not sure.
