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Test 3 > SI > Flashcards

SI Flashcards

1
Q

Which one of the following describes the interlock between MOV-3081, HPSI Train 1 to
Cold Leg Valve, and MOV-3083, HPSI Train 1 to Hot Leg Valve?
A. The hand switch for MOV-3081 must be in AUTO before MOV-3083 may be
opened.
B. MOV-3083 must be closed before MOV-3081 may be opened.
C. SS-3083B, Hot Leg Injection Selector Switch, must be in the “MO-3083” position
before MOV-3081 may be closed.
D. MOV-3081 must be closed before MOV-3083 may be opened.

A

D. MOV-3081 must be closed before MOV-3083 may be opened.

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2
Q

The plant was on Shutdown Cooling when a loss of Shutdown Cooling occurred due to
a seized bearing on P-67A Low Pressure Safety Injection (LPSI) Pump. The crew is
now ready to start P-67B, LPSI Pump, to restore shutdown cooling flow.
Which one of the following flow rates for P-67B is the MINIMUM acceptable flow rate
for pump protection?
A. 150 gpm
B. 250 gpm
C. 500 gpm
D. 2810 gpm

A

B. 250 gpm

Min flow is 170 gpm

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3
Q

Given the following:
-The Plant is in MODE 5 with Shutdown Cooling is in service
-A loss of power to Bus 1C occurs
-The CRS directs you to throttle LPSI Injection Valves
Which one of the following describes the LPSI Injection Valves that can be throttled
from the Control Room for these conditions?
A. MO-3008, LPSI TO REACTOR COOLANT LOOP 1A, and MO-3010, LPSI TO
REACTOR COOLANT LOOP 1B
B. MO-3010, LPSI TO REACTOR COOLANT LOOP 1B, and MO-3014, LPSI TO
REACTOR COOLANT LOOP 2B
C. MO-3012, LPSI TO REACTOR COOLANT LOOP 2A, and MO-3014, LPSI TO
REACTOR COOLANT LOOP 2B
D. MO-3008, LPSI TO REACTOR COOLANT LOOP 1A, and MO-3012, LPSI TO
REACTOR COOLANT LOOP 2A

A

C. MO-3012, LPSI TO REACTOR COOLANT LOOP 2A, and MO-3014, LPSI TO
REACTOR COOLANT LOOP 2B

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4
Q

Given the following:
-A Reactor trip from full power occurs
-Pressurizer pressure lowers to 1500 psia
-Left channel Safety Injection equipment does NOT start
A loss of which one of the following buses explains the above sequence of events?
A. Preferred AC Bus Y30.
B. Preferred AC Bus Y10.
C. DC Bus D11-1.
D. DC Bus D11-2.

A

A. Preferred AC Bus Y30.

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5
Q

The plant has experienced a loss of Preferred AC Bus Y-10. Which one of the
following describes the minimum logic necessary to automatically initiate Recirculation
Actuation (RAS) on low SIRWT Level?
A. BOTH level switches powered from the left channel reach a low level setpoint.
B. BOTH level switches powered from the right channel reach a low level setpoint.
C. ANY level switch powered from the right channel reaches a low level setpoint.
D. ANY level switch powered from the left channel reaches a low level setpoint.

A

C. ANY level switch powered from the right channel reaches a low level setpoint.

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6
Q

Given the following:
-The Plant is in MODE 3
-Preparations are being made to perform a critical approach and enter MODE 2
Safety Injection Tank parameters are as follows:
SIT PRESSURE LEVEL (% actual) BORON (ppm)
T-82A 207 52 2250
T-82B 217 20 1920
T-82C 219 67 1880
T-82D 215 55 1700
Based on the above parameters, which Safety Injection Tank(s), if any, will NOT be
able to perform it’s design function if the Plant is placed in MODE 2?
A. T-82B AND T-82C ONLY.
B. T-82A AND T-82D ONLY.
C. T-82C AND T-82D ONLY.
D. None, all parameters are within specifications.

A

C. T-82C AND T-82D ONLY.

Level must be between 14 - 66% and boron must be between 1720 - 2500ppm

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7
Q

Given the followng conditions:
-The plant is in Mode 1.
-T-82A, Safety Injection Tank, level has just been adjusted to 46% using High
Pressure Safety Injection Pump P-66A.
The reason for monitoring pressure between the SI line check valves for several hours
is because the pressure may:
A. RISE due to heat transfer across the PCS check valves, expanding the cooler water
in these pipes.
B. RISE due to increased check valve leakage since the differential pressure across
the check valve was lowered during the fill.
C. LOWER as the sampling is performed on the Safety Injection Tank, and thereby
causing flashing in the line.
D. LOWER due to leakage back to the Low Pressure Safety Injection (LPSI) pump
discharge, causing LPSI discharge pressure to rise to its relief valve setpoint.

A

A. RISE due to heat transfer across the PCS check valves, expanding the cooler water
in these pipes.

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8
Q

Given the following conditions:
-The plant is being cooled down and depressurized in preparation for a refueling outage.
-SIAS is BLOCKED
-A failure of the Pressurizer controller causes pressure to rise from 1550 psia to the following pressures:
A- 1700 psia
B- 1685 psia
C- 1695 psia
D- 1705 psia
The Safety Injection signal is:
B. no longer blocked since 3/4 pressure channels have increased above 1690 psia. SIS WILL actuate when pressure is lowered to

A

A. no longer blocked since 3/4 pressure channels have increased above 1690 psia. SIS WILL actuate when pressure is lowered to

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9
Q

The Plant is preparing to start P-67A, LPSI Pump, to place the Shutdown Cooling
System in service.
Which one of the following is the LOWEST P-67A flow rate that meets the minimum
required flow rate for pump protection per SOP-3, “Safety Injection and Shutdown
Cooling System”?
A. 160 gpm
B. 220 gpm
C. 500 gpm
D. 1000 gpm

A

B. 220 gpm

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10
Q

Given the following:
-A Reactor trip from full power occurs
-Pressurizer pressure lowers to 1500 psia
-Right channel Safety Injection equipment does NOT start
A loss of which one of the following buses explains the above sequence of events?
A. Preferred AC Bus Y40.
B. Preferred AC Bus Y20.
C. DC Bus D21-1.
D. DC Bus D21-2.

A

B. Preferred AC Bus Y20.

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11
Q

Given the following:
-The Plant is in MODE 3
-Preparations are being made to perform a critical approach and enter MODE 2
Safety Injection Tank parameters are as follows:
SIT PRESSURE LEVEL (% narrow range) BORON (ppm)
T-82A 207 12 2250
T-82B 217 20 1920
T-82C 219 60 1690
T-82D 215 55 1900
Based on the above parameters, which Safety Injection Tank, if any, will NOT be able
to perform it’s design function if the Plant is placed in MODE 2?
A. NONE.
B. T-82A and T-82C.
C. T-82A ONLY.
D. T-82C ONLY.

A

B. T-82A and T-82C.

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12
Q

Given the followng conditions:
-The Plant is in MODE 1
-T-82A, Safety Injection Tank, level has just been adjusted to 46% using P-66A,
High Pressure Safety Injection Pump
The reason for monitoring pressure between the SI line check valves for several hours
is because the pressure may:

A. RISE due to heat transfer across the PCS check valves, expanding the cooler water
in these pipes.

B. RISE due to increased check valve leakage since the differential pressure across
the check valve was lowered during the fill.

C. LOWER as the sampling is performed on the Safety Injection Tank, and thereby
causing flashing in the line.

D. LOWER due to leakage back to the Low Pressure Safety Injection (LPSI) pump
discharge, causing LPSI discharge pressure to rise to its relief valve setpoint.

A

A. RISE due to heat transfer across the PCS check valves, expanding the cooler water
in these pipes.

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13
Q

The plant is at full power with the following parameters noted:
-Containment pressure at 2.9psig and rising
-S/G pressures at 820 psia and lowering
-Pressurizer pressure at 1710 psig and lowering
At the time these parameters were noted, which one of the following describes the expected status of the SI system?
A. Actuated due to Containment pressure
B. Actuated due to Pressuizer pressure
C. Not actuated, but will when S/G pressure

A

D. Not actuated, but will when Containment pressure is 4 psig

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14
Q 
Given the following conditions:
-LOCA has occured
-PCS pressure is at 1450# and slowly lowering
-SIRWT level at 70% and slowly lowering
As PCS pressure is lowered, at what pressure will the HPSI and LPSI pumps first start injecting borated water into the PCS?
HPSI / LPSI
A. 1100/150
B. 1150/250
C. 1200/200
D. 1300/230
A

C. 1200/200

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15
Q

-Plant is at full power
-SIT T-82C level has lowered due to sampling
-You have been directed to fill the tank
-The CRS informs you that SI line check valve leakage on that loop is 0.05gpm
Which one of the following describes the significance of the check valve leakage to the task of filling the SI tank?
A. The HPSI train injection valve should be opened slowly to prevent water hammer, since a steam void may have formed in the line
B. The high pressure from the HPSI pump may cause leakage to the PCS through the leaking check valve, resulting in PCS boration
C. The HPSI train injection valve should be opened quickly in an attempt to reseat the check valve while filling the SI Tank
D. Filling the SIT will lower its pressure, resulting in lower pressure in the SI line on that loop, causing flashing in the line

A

A. The HPSI train injection valve should be opened slowly to prevent water hammer, since a steam void may have formed in the line

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16
Q

-The plant is at 70% power
-While Chemistry is performing its monthly sample of the SIRWT, the boron concentration is determined to be 1705ppm. Tha sample has been verified to be correct.
What actions are required?
A. Raise SIRW boron to at least 1720ppm in 1 hour
B. Raise SIRW boron to at least 1720ppm in 8 hours
C. Reduce SIRW boron to no greater than 1700ppm in 1 hour
D. Reduce SIRW boron to no greater than 1700ppm in 8 hours

A

B. Raise SIRW boron to at least 1720ppm in 8 hours

17
Q 
Which one of the following SITs is capable of delivering the required volume of borated water to the PCS for a large break LOCA?
A. T-82A at 12% and 200#
B. T-82B at 20% and 195#
C. T-82C at 60% and 224#
D. T-82D at 40% and 181#
A

C. T-82C at 60% and 224#

14-66% and >200#

18
Q

Which statement explains the design of Hot Leg Injection during a LOCA?
A. Ensures that on a cold leg break the core will remain covered
B. Ensures that on a hot leg break the escaping fluid will be subcooled, which helps lower containment pressure
C. Raises the flow through the HPSI pump to keep it from overheating
D. Flushes the core to prevent boric acid from precipitating out that may potentially block core cooling flow

A

D. Flushes the core to prevent boric acid from precipitating out that may potentially block core cooling flow

19
Q

During a controlled cooldown, the operators have blocked SIAS in accordance with GOP-9, “Mode 3 >525F to Mode 4 or Mode 5”.
After blocking SIAS, how will the plant be protected from a large break LOCA?
A. The operator is relied on to manually actuate SIAS
B. The operator is relied on to manually un-block the SIAS block
C. The containment high pressure SI is NOT blocked by this action
D. The operator is relied on to manually initiate the containment high pressure SI

A

C. The containment high pressure SI is NOT blocked by this action

Test 3 (4 decks)

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