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Systems > Test 4: RPS, RCIC, HPCI, SLC, TIP, RHR, ADS, Core Spray, RWCU, RSDP > Flashcards

Test 4: RPS, RCIC, HPCI, SLC, TIP, RHR, ADS, Core Spray, RWCU, RSDP Flashcards

1
Q

What is the Reactor Steam Dome High Pressure RPS setpoint (per TRM)?

A

1060psig

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2
Q

What is the basis for the Reactor Steam Dome High Pressure setpoint?

A

Prevents system rupture and counteracts the reactivity addition from the decrease in voids

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3
Q

What is the SDV RPS setpoint? (TRM)

A

104gal

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4
Q

What is the basis for the SDV level trip?

A

-ensures adequate volume available for scram discharge

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5
Q

What is the high drywell pressure scram setpoint? (TRM)

A

1.7psig

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6
Q

What is the basis for the high drywell pressure scram setpoint?

A
  • indicates possible RCS breach

- minimizes fuel damage and reduces energy to coolant and drywell during LOCA

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7
Q

What is the RPV level scram setpoint?

A

LL1 - 166”

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8
Q

What is the basis for the RPV level scram?

A

-maintains fuel integrity (<2200dF w/ ECCS during LOCA)

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9
Q

What is the RPS setpoint and logic for Turbine Stop Valves?

A

<90% open

BAD CAD logic - need both TSVs in string to give trip for that channel

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10
Q

What is the basis for TSV/Turbine Trip scram?

A
  • Protects MCPR, anticipates increase in pressure and flux from the TSV closure
  • Scrams before neutron monitors or RPV pressure
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11
Q

What is the RPS setpoint and logic for Turbine Control Valves?

A

-600psig EHC (RETS header)
1 out of 2 twice
A: 1 or 3
B: 2 or 4

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12
Q

What is the basis for TCV scram?

A
  • Protects MCPR, anticipates increase in pressure and flux from the TSV closure
  • Scrams before neutron monitors or RPV pressure
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13
Q

What is the MSIV scram setpoint and logic?

A

-<90% open
BAD CAD
-closing 2 steam lines may cause scram
-closing 3 steam lines will always cause scram

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14
Q

What is the basis for the MSIV scram?

A

Prevents reactivity spike from pressure transient

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15
Q

What is the setpoint and logic for SRM scram?

A
  • Hi Hi 5x105 cps

- Any SRM will cause scram without shorting links installed

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16
Q

What is the setpoint for IRM scram?

A

117%/125%

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17
Q

What is the basis for the IRM scram?

A
  • protects against rod withdrawal errors

- maintains enthalpy <170 cal/gm

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18
Q

What is the APRM high flux scram set point for each mode?

A

117.4% (RUN)

15% (not in RUN)

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19
Q

What is the TLO simulated thermal power scram set point?

A

0.55W + 61.1%

W = core flow

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20
Q

What is the SLO simulated thermal power scram set point?

A

0.55(W-20.5)+61.1%

W = core flow

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21
Q

What is the basis for the APRM hi flux scram?

A

RUN - protects against overpressure transient and is assumed to terminate the CRDA and MSIV closure transient
-Also limits potential consequences of transients in Mode 1 that could result in exceeding safety limits

Startup - limits power to less than 23%, secondary protection to IRM trip

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22
Q

What is the logic for APRM/OPRM scrams?

A

Voters - a trip signal from at least 2 APRMs/OPRMs

INOP APRM = 1 vote

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23
Q

When is the RPV pressure trip bypassed?

A

Never

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24
Q

When is the Turbine Trip scram bypassed?

A

Less than 26%CTP (117psig 1st stage turbine pressure) or with keylock switch

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25
Q

When is the TCV scram bypassed?

A

Less than 26%CTP (117psig 1st stage turbine pressure) or with keylock switch

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26
Q

When is the SDV level scram bypassed?

A
  • Mode switch in REFUEL or SHUTDOWN

- manual switch

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27
Q

When is the MSIV scram bypassed?

A

Mode switch NOT in RUN

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28
Q

When is the high drywell pressure scram bypassed?

A

Never

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29
Q

When is the RPV level scram bypassed?

A

never

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30
Q

What is the minimum amount of time that must pass before a scram can be reset?

A

10 seconds

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31
Q

How much time must pass once the mode switch is placed in shutdown before the scram can be reset?

A

2 seconds

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32
Q

What is the RPS trip logic?

A

1 out of 2 taken twice

De-energize to trip

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33
Q

What is the normal power supply for RPS A?

A

E5(7) via MG set A and EPA breakers 1 and 2

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34
Q

What is the normal power supply for RPS B?

A

E6(8) via MG set B and EPA breakers 3 and 4

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35
Q

What is the Alternate normal power supply for RPS A?

A

E5(7) via EPA breakers 5 & 6

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36
Q

What is the alternate normal power supply for RPS B?

A

E5(7) via EPA breakers 5 & 6

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37
Q

What is the alternate alternate power supply for RPS A?

A

E6(8) via EPA breakers 5 & 6

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38
Q

What is the alternate alternate power supply for RPS B?

A

E6(8) via EPA breakers 5 & 6

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39
Q

SSPV chatter can be indicative of what in relation to RPS power supplies?

A

Low voltage

40
Q

What document requires Alternate Rod Insertion (ARI)?

A

10CFR50.62

41
Q

What causes the blue scram light to illuminate on the full core display?

A

Both the 126 and 127 scram valves not full closed

42
Q

How could approximately 1/4 of the control rods scram at a time?

A

Pull fuse to SSPV group

43
Q

Are SDV vents and drains normally open or closed?

A

Normally open (de-energize to close)

44
Q

What is the effect of a half scram on the SDV vents and drains?

A

Remain energized (remain open)

45
Q

How many backup scram valves are there and where are they located?

A

2

Located on scram air header

46
Q

How many ARI valves are there and where are they located?

A

8 (4 pairs )
1 each on North and South HCU banks
1 on scram air header supply
1 on SDV vents and drains air supply

47
Q

What are the initiation signals for ARI and what is the logic?

A

LL2 (105”) or RPV Pressure 1137.8psig

Must receive two of the same signal

48
Q

What powers ARI valves?

A

11A(12A)

Div 1 only!

49
Q

What powers Backup scram valves?

A

Div 1: 3(4)A

Div II: 3(4)B

50
Q

RCIC initiation signal?

A

LL2- 105”

51
Q

RCIC initiation sequence?

A

F045, Steam Supply, opens (NC)
F025/26, Drain pot drains, close when F045 NFC.
F004/5, Condensate pump disch. to RBEDT, close when F045 NFC.
F046, Cooling supply, opens (NC)
F013, Injection valve, opens (NC) if V8 and F045 are NFC
Barometric condenser vacuum pump starts

52
Q

RCIC trips

A

Manual Trip (RTGB and RSDP)
Overspeed @ 5625 RPM (RTGB and RSDP)
Level High @ 206”. Will not reopen from RSDP (RTGB and RSDP)
Exhaust Pressure high @ 50# (RTGB)
Exhaust diaphragm pressure high @ 5# (RSDP)
Suction Pressure low @ 15” Hg for 13 sec (RTGB and RSDP)
Any isolation signal (RTGB)

53
Q

RCIC Group 5 Isolations

A 
Group 5  closes steam supply F007 and F008 and torus suction valves F029 and F031.    Isolation signals:
Steam line pressure low: 70#
Exhaust diaphragm pressure high: 5#
Leak detection
    Steam tunnel HI 165/190F for 27 min
    Steam tunnel dT 47F for 27 min
    Steam line are 165F for 27 min
    dT @ RCIC 47F
    RCIC area HI 165F 
Flow high: 220% for 5 sec 
Manual: OUTBOARD only w/. initiation signal present
54
Q

RCIC Group 9 isolations

A

Group 9 closes vacuum breakers F062/F066

Steam line pressure low @ 70# AND High DW pressure @ 1.7#

55
Q

RCIC discharge pressure @ 800# and 30 gpm, what is the status of F019, Min flow?

A

Opens @ >130# and <40 gpm

56
Q

What will close the RCIC F013, injection valve?

A

V8, TTV or F045, Steam supply full closed

57
Q

What will cause the RCIC F010, CST suction, to close?

A

Both the F029 and F031, Torus suctions, full open

58
Q

Where does RCIC draw steam from?

A

Main Steam Line C upstream of MSIV

59
Q

Where does RCIC steam exhaust to?

A

Suppression Pool

60
Q

What is RCIC’s normal suction from?

A

CST

61
Q

What is RCIC’s alternate suction?

A

Suppression Pool

62
Q

What will cause the RCIC torus suction valves (F029 and F031) to open?

A

Low CST level 3 feet, 1 inch.

63
Q

What is the capacity of RCIC?

A

equal to the boil off rate 15 minutes after a reactor scram (1-2%power)

64
Q

What starts the RCIC ramp generator?

A

Turbine Steam Supply (F045) valve opening

65
Q

When does the RCIC min flow valve (F019) normally open and close?

A

Open discharge >130# and <40gpm

Close >80gpm

66
Q

What is required for the F013 RCIC injection valve to open?

A

Auto opens LL2 and V8 TTV and F045 TB steam supply valve not full closed

67
Q

What will cause the RCIC F010, CST suction, to open automatically?

A

This N.O. valve receives an open signal upon system initiation (LL2), and will open if closed unless both F031 and F029 are open.

68
Q

What is the effect on RCIC when the system is injecting and RPV level reaches 206”?

A

High RPV level of 206 inches causes F045 to close. F045 FC causes F013 injection valve to close. Steam line drain valves F025, F026 open due to F045 FC. Cond’t Pump Discharge valves to RBEDT F004 and F005 lose their auto close function when F045 closes. Cooling water supply valve F046 does NOT auto close on lack of initiation signal.

69
Q

What is the effect of putting a RCIC valve control in manual at the MCC with regards to PCIS?

A

PCIS valves in local will no longer close on a Group 5 isolation and they cannot be operated from the control room

70
Q

What is the flow path for RCIC in pressure control?

A

CST to CST

71
Q

What logic remains when RCIC F045 TB steam supply valve is placed in local at the RSDP?

A

F045 will still close when RPV level reaches 206”

72
Q

How long after initiation ARI can ARI be reset?

A

25 seconds

73
Q

What are the ECCS Acceptance Criteria?

A 
Peak Clad temp <=2200dF
Max Clad Oxidation <= 17%
Max Hydrogen production <=1% of max 
Maintain coolable core geometry
Long term cooling with no operator actions
74
Q

What methods can be used for adequate core cooling?

A

Core Submergence
Steam cooling w/injection
Steam cooling w/o injection
2/3 core height with 5000gpm of core spray

75
Q

What controls the amount of heat available for the Zr+2H20 reaction?

A

Operating within APLHGR limits

76
Q

What controls the core uncovery time for accident analysis?

A

ECCS response time

77
Q

What is ECCS response time?

A

Time from when a parameter exceeds ECCS initiation set point until ECCS performs safety function

78
Q

What is the difference between Deflagration and Detonation?

A

Both burn with intense heat
Deflagration - flames travel at subsonic speeds
Detonation - flames travel at super sonic speeds

79
Q

What comes off of the inner pipe within a pipe and where does the inner pipe go in the RPV?

A

Under core plate

  • SLC injection
  • Core Plate D/P
  • Jet Pump Flow
80
Q

What comes off of the outer pipe within a pipe and where does the outer pipe go in the RPV?

A

Above core plate

  • CRD D/P
  • Core plate D/P
  • Core Spray Leak Detection
81
Q

What are the effects of a loss or transfer of an RPS power supply?

A 
CREV initiation
1/2 scram
SBGT starts
Half MSIV isolation signal
RB HVAC isolates
Half PCIS isolations (A-in B-out in general)
Full CAM, PASS, 1/2 CAC
RPS A only - TIPs retract
82
Q

What signals will auto initiate HPCI?

A

LL2 (105”)
OR
Hi DW pressure (1.7#)

83
Q

What happens on a HPCI initiation?

A 
White initiation light
F059 - cooling water valve - OPEN
F004 - CST suction valve - OPEN
F007 - pump discharge - OPEN
F008 &amp; F011 - test return line - CLOSED
Vacuum pump starts
F001 - steam supply - OPEN
F025/F026 - condenser drain - closed
Aux Oil Pump starts
V9 Governor valve initially strokes open then closed and the V8 turbine stop valve starts to open
84
Q

What causes a Group 8 Isolation and what valves are affected?

A

LL 1 (166”) OR High steam dome pressure (131#)

RHR SDC suction valves F008, F009 close
RHR Inbd Injection Isolation F015 on LL1 only if F008 or F009 are not full close

85
Q

What causes a Group 4 isolation?

A 
SELF
Steam line low pressure - 115#
Exhaust Diaphragm Pressure - 7#
Leak Detection
     HPCI equip area 165F
     HPCI steamline area 165F
     Tunnel deltaT 47F
     HPCI steam tunnel 165F, 190F
Flow high (steam) - 220% for 5 seconds
Manual (closes outboards only)
86
Q

What is the normal suction source for HPCI?

A

CST

87
Q

Where does HPCI inject?

A

Feedwater line A

88
Q

What will cause HPCI to swap suction to alternate? What is the alternate supply?

A

Suppression Pool
Low CST level (<3’5”)
OR
hi torus level (-25”)

89
Q

When does the HPCI min flow valve open?

A

<400gpm and >140#

closes >1400gpm

90
Q

What causes a HPCI trip?

A 
Manual
Overspeed - 4600rpm 
Level - 206"
Exhaust pressure high - 157.5#
Suction pressure low - 15" vacuum for 13 seconds
Any isolation signal
91
Q

When do HPCI trips reset?

A

All except level and isolation clear when condition clears.

high level seals in until LL2 or manually reset

High DW pressure will NOT initiate HPCI if tripped on LL2

92
Q

What are the group 4 valves?

A

HPCI steam F002 (inboard - Div 2 AC)
F003 (outboard - Div 1 DC)

HPCI Torus Suction
F042 (inboard - div 1 DC)
F041 (outboard - div 1 DC)

93
Q

What are the group 7 valves?

A

HPCI Exhaust Vacuum Breakers
F079 inboard - Div 2 AC
F075 outboard - Div 1 AC

94
Q

What are group 7 isolation signals?

A

Steam line low pressure (115#)
AND
Drywell Press High (1.7#)

95
Q

What is a HPCI turbine trip?

A

HPCI turbine trip solenoid energizes to trip V8

96
Q

What are the effects of a loss of panel 3A(4A) on HPCI?

A

HPCI will not operate,
outboard isolations fail to close
Torus suction valves fail open due to false CST low level signal

97
Q

What permissions need to be met for the HPCI CST suction valve (F004) to open?

A

At least one torus suction valve must not be full open (F041 or F042)
or control switch

Systems (6 decks)

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