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LOIT SIM 2018 JCH > LOIT SIM 2018 AOP Notes > Flashcards

LOIT SIM 2018 AOP Notes Flashcards

1
Q

Do the TS requirements apply while using AOP’s?

A

YES

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2
Q

During 40AO-9ZZ01, Emergency Boration, what is a Entry condition?

A

Loss of SDM

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3
Q

During Emergency Boration, if SDM isn’t met and No Letdown, what is directed?

A

Trip Reactor

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4
Q

During Emergency Boration, when would we ONLY use HPSI?

A

If Charging isn’t available

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5
Q

During Emergency Boration, when do we use LPSI?

A

If < 220 psia

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6
Q

What level in RWT do we start using Alternate Suction (530/527) during Emergency Boration?

A

< 73%

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7
Q

If RWT is >73%, what can we use during Emergency Boration?

A

536 - If PC recircing RWT, need >83% (1 CHG PP if not >92%) 3rd CH PP in PTL

514 - w/o BAMPS thru 164 (BA filter bypass), No PC, 3rd CH PP in PTL

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8
Q

RCS Leakage that occurs within the RCS Barrier

A

IS RCS Leakage

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9
Q

RCS Leakage outside of RCS barrier and is Capable of being Isolated

A

IS NOT RCS Leakage

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10
Q

RCS Leakage outside of RCS barrier that is Unisolable

A

IS RCS Leakage

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11
Q

Tech Spec 3.4.14, RCS Operational Leakage shall be Limited to:

A
  • No Pressure Boundary
  • 1 GPM Unidentified
  • 10 GPM Identified
  • 150 GPD Primary to Secondary thru any 1 SG
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12
Q

During RCS or SG Tube Leak, when do we Isolate Letdown?

A

If all available CH PPs running & PZR LVL still Lowering

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13
Q

If PZR LVL lowers with all 3 CH PPs running & LD isolated

A

Trip Reactor & Perform SPTA’s

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14
Q

During RCS Leakage, if Isolating LD maintains the PZR LVL

A

Continue 40AO-9ZZ02 & Quantify Leak

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15
Q

When RCS leak is present and sending AO’s

A

Use Caution when going to Investigate

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16
Q

During CH Header Leaks, besides conservative action of tripping the Reactor, what else is done

A

Align ALTERNATE CH Path for Boration

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17
Q

What is flowpath for CH Flow restoration to RCS

A
  1. CH PP Handswitch in PTL
  2. Close CH PP Normal Discharge Valves
  3. Open the CH PP Alternate Discharge Valves
  4. Open either Train A or B HPSI System X-Tie
    * If A - Open HPSI Inject Vlv, B - Long Term Recirc
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18
Q

During Alternate Discharge for CH, what is impact to Letdown

A

Loss of CH Flow thru Regen HX, LD Isolates
PZR LVL goes up
Stop CH flow after Alternate Lineup completed

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19
Q

During CH Alternate Discharge, what happens to Seal Injection

A

OPS has 3 Minutes of pump operation if NC were Lost

Seal Life shortened by contaminants

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20
Q

During CH Alternate Discharge, what is impact to Aux Spray

A

If lose Main Spray, Loss of PZR control

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21
Q

During SGTL, what occurs related to SBCS & Aux Steam OPS

A

Perform App. C to minimize release
Place SBCV’s 1007 & 1008 to OFF
Isolate AS X-Tie

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22
Q

Key Excess RCS Leakrate Entry Condition

A

NC = RU-6, surge tank lvl rising

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23
Q

Regen HX leakage

A

IS NOT RCS Leakage (Intersystem) capable of being isolated

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24
Q

RCP HPSC leakage

A

IS RCS Leakage (NC Reliefs)

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25
Q

ERFDADS RCS Leakage indication

A

Lags actual by 7.5 Minutes

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26
Q

Leak Rate equation

A

CHG - CBO - LD

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27
Q

For a LD Leak during RCS Leakage

A

Cooldown (if possible)
Lower LD to 10 GPM to optimize cooldown
Isolate at 180F Regen HX prevents steam leak

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28
Q

PZR Safety Leak during RCS Leakage

A

Use both PZR Cooling Fans

Lower PZR PRESS to not <2175 PSIA, RDT L/T/P

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29
Q

LD Leak into LD HXC

A

PCV’s close (& AO isolates NC to LD HXC)

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30
Q

RCP HSPC Leakage

A 
Trip Reactor
Trip RCP's
Isolate CBO
Close HPSC Breakers and Valves (close NC CIV's if not isolated)
NC Reliefs ensure CIV's close
Shutdown if NC Activity is 60 Ci or more
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31
Q

For SGTL, which RU monitor/channel provides most sensitive real-time leak rate?

A

RU-141 Channel 2

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32
Q

Limits for RCP operations without NC

A

NO NC w/ Seal Injection, restore NC in 10 minutes

NO NC w/o Seal Injection, restore NC in 3 mins

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33
Q

Why do we isolate CBO after Loss of CW to RCP’s?

A

Prevent damage to pump seals (high temps of CBO - no NC cooling flow)

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34
Q

NC Leak inside CTMT actions

A

Close NC CTMT isolation valves
Trip Reactor
Stop all RCP’s
Isolate CBO

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35
Q

NC Leak outside CTMT

A

ID impacts when EW utilized

36
Q

Safety System Operability when EW is cross tied during RCS Leakage

A

Cross-connect EW to NC makes BOTH EW (3.7.7) & EC (3.7.10) Inoperable
* Cross to SFP does NOT Inop either

37
Q

EWA-UV-145 & 65 (EWA X-Tie to NC Valves) will Auto-Close on either of what 2 conditions?

A
  1. SIAS or

2. Low EW ‘A’ Surge Tank Lvl

38
Q

Per Loss of CW AOP, on a Loss of PW or TC, what is directed?

A

Trip Reactor

39
Q

With “B” EW x-tied to NC, what will Isolate flow to the RCP’s?

A

CSAS

40
Q

For a NC Leak in CTMT, what steps are performed per Loss of CW?

A
  1. Close NC CIV’s (401, 402, 403)
  2. Trip Reactor
  3. Stop RCP’s
  4. Isolate CBO
41
Q

When RCP motor or bearing temps rise, what is potential damage that can occur?

A

Insulation breakdown (leads to motor faults & bkr trips due to overcurrent)

42
Q

During RCP Emergencies AOP, what is RCP Upper Thrust Brg Temp and Motor amps that are Trip Criteria?

A
  1. RCP Upper Thrust = >245F

2. Motor Amps = >520 amps

43
Q

On RCP Upper Thrust Bearing temps trending to 245F, what can we consider doing?

A

Starting Hydraulic Oil Lift Pump (slow rate of rise)

44
Q

What temperature response is expected for a RCP with Seal Injection removed?

A

RCP HPSC inlet temps rise to 200-220F. All other seal temps remain normal

45
Q

What occurs to a RCP in Hot Standby on loss of Seal Injection & NC?

A

After 20 Minutes, could experience Seal Damage

46
Q

RCP Emergencies AOP directs a Reactor Shutdown and the affected pump secured if Seal #2 pressure outlet gets to?

A

> 1700 psia (seals 1 & 2 indicate degraded)

47
Q

RCP CBO flow should be?

A

Between 0.5 - 9.5 GPM

48
Q

If RCP CBO flow is NOT between 0.5 - 9.5 GPM, what is performed per the AOP?

A
  1. Trip Reactor
  2. Stop affected RCP (s)
  3. If CBO >9.5 GPM, isolate RCP CBO
49
Q

If 1 seal fails on a RCP, what do we evaluate?

A

The need to initiate a Shutdown to remove the affected RCP from service

50
Q

When MUST a shutdown be performed for RCP seals?

A
  1. 2 seals indicate failed on a RCP
  2. Seal 2 Outlet Pressure >1700 psig
  3. If Seal 1 or 2 drop is >1700 psid
51
Q

What temp do we isolate CBO before getting to?

A

> 250F on seal 2

52
Q

Per Loss of Letdown, if 515 or 523 closes and the Hi-Temp switch is Failed, what is performed?

A

Jumper around the switch

53
Q

On Loss of Letdown, RCP CBO will end up lowering the PZR what PCT and how Long?

A

10% in 55 Minutes (assumes 3 GPM CBO/RCP)

54
Q

What is temperature interlock that closes CHB-UV-515 and required actions to Restore LD?

A

515 closes on SIAS & Hi-Temp from Regen HX (413F, 395F is alarm)

If switch fails, verify indication on TI-221, then Jumper 63X-T221.

55
Q

Why should Boron Equalization not be performed during Extended Loss of Letdown?

A

Depletes RCS Hydrogen

56
Q

Once Seal Injection is removed from an RCP, what is the temperature response for that RCP?

A

HPSC Inlet Temps should rise to between 200-220F when Seal Injection is stopped, all other seal temps should remain NORMAL

57
Q

TS 3.4.9 is OPERABLE with what 2 parameters and what Modes?

A

a. PZR LVL 27%-56%
b. 2 groups PZR Heaters OPERABLE with >125 KW capacity

Modes 1,2,3

58
Q

During Loss of LD, if LD is lost for >22 minutes what is performed?

A

Open CH-526 (bypass) for 4 minutes

59
Q

If PZR LVL gets to 56% or Charging isn’t Needed, what is performed during Loss of LD?

A

Close Seal Injection valves or CH-255 then stop Charging Pumps

60
Q

During Loss of LD, if Seal Injection is needed and/or PZR LVL <53%, what is performed?

A

Open 240, start Charging pumps, adjust 240 to 90-135 PSID, and restore SI

61
Q

When do we know that Adequate Seal Injection flow exists?

A

Seal Injection Flow > CBO flow

62
Q

On a Loss of NKN-D42, what occurs with CVCS?

A

CH-523 closes due to 63X relay
Charging Pumps are Anti-Pumped
Loss of Power to PLCS control circuit

63
Q

On a Loss of IA, what should be expected when IA pressure drops <80#?

A

CD Pump mini-flow recirc Fails OPEN (lowered MFP suction pressure/flow)
HDP Discharge Fails CLOSED (Lower MFP flow)
HDT Hi-Lvl Dumps Fail OPEN (Lower MFP flow)

64
Q

What occurs with IAA-UV2 on a LOP & “A” CSAS?

A

Fails CLOSED on LOP (PKA)

CLOSES on CSAS “A”

65
Q

If IAA-UV-2 WON’T OPEN, what is performed?

A

Trip RX
Perform SPTA’s
Trip all RCP’s
Isolate RCP CBO to all RCP’s

66
Q

On a loss of IA to CTMT, what happens to the RDT?

A

Increased Level & Pressure (RCP CBO divert, 506 Fails Closed)

67
Q

At 50-60 PSIG during Loss of IA, what occurs with Feed and Steam Isolation Valves?

A

MSIV, Econ FWIV, Econ Control Vlvs FAI

IV’s can still Fast-Close

68
Q

As Backpressure rises during a Loss of Condenser Vacuum, what occurs with the CD, MT and FWPT?

A
  1. 5” = SBCS Condenser Interlock
  2. 5” = MT Trip
  3. 5” = MFWPT’s Trip
69
Q

What is TRIP Criteria when the Main Generator is sync’d to the Grid at <410 MW?

A

ANY of following:
Condenser Pressure > 5” HgA
CD Pressure > 4” HgA < 5” HgA for > 1 hour
MT load < 70MW

70
Q

If Main Generator is sync’d and backpressure in ANY shell is 7” and rising, what is expected?

A

Trip Reactor

71
Q

During Loss of Vacuum, when lowering Turbine Load, what is done if TAVE-TREF can’t be maintained within 5F?

A

Use SBCS 1007 or 1008, OR use ADV’s

72
Q

Once vacuum is restored after a Loss of Vacuum, what needs to be done to SBCS?

A

Manual Reset (B06-XC Off Reset) or at Test Panel

73
Q

During normal conditions, how many stages of AR Pumps are “In-Service”?

A

BOTH

74
Q

What occurs when a Heater Drain Pump trips?

A

Lowers Hotwell Level

CD Pump trip if HDP trips at <35” Hotwell (9” drop)

75
Q

What is power source to Cooling Tower LC’s?

A

NKN-D19 (Panel G)

76
Q

On a MT Trip from 100% due to 7.5” HgA backpressure, what else is expected?

A

Only SBCS 1007/1008 open

RX Trip on PZR HI & MFP’s operating

77
Q

For the Load Reject AOP, what are RX Trip Criteria?

A

PWR > 74% & RPCB hasn’t occurred (Auto or Manual)
CEA Deviates > 6.6” from group & any RG < TIL’s
SBCS Cond Interlock can’t be reset & PWR > 12%
CPC ASI point 187 > .45 trend to .5 (+/-)

78
Q

What occurs on a Loss of NKN-D42 (CVCS)?

A

CHN-227 Fails (CH PP swaps suction to 514)
LD Isolates (63X relay, CHB-523 Closes)
DC Lost to VCT Makeup (NA)
CHN-201 X/Y LD Backpressure valves FC
All CH PPS stop (Manual Control available)
RCP Seal Injection valves FO
Loss of Position for LD CTRL & BP Valves

79
Q

Loss of NKN-M45, how does Plant respond?

A

Loss of CTRL PWR to Non-Vital switchgear
Turbine Trip (requires GEN Trip)
Loss NAN-S01/S02 (No Fast Bus Transfer)
Loss of Non-Vital 13.8, 4.16 and 480 V PWR
Class Busses remain aligned to Off-Site PWR
Manual CTRL of PZR Heaters based on PZR LVL

80
Q

Lose NKN-M45, what is impact to MN GEN and what immediate OPS actions are required?

A

MN GEN Protective Relaying Lost. MN GEN NO TRIP
RX TRIP Relay loses 125 VDC = TURBINE TRIP

AO also Closes Shorting BKR at Excitation Cabinet

81
Q

Loss of 125 VDC, impact to HTR DRAIN PPS and Immediate OPS Actions per ZZ14?

A

D41: HDP B Loses CTRL PWR, RECIRC VLVS FO, HDP A DISCH VLV FC

D42: HDP A Loses CTRL PWR, DISCH and RECIRC VLVS FC, AO open NBN-S02E Manually

D43: HDP B DISCH VLV FC

82
Q

Plant response to Loss of NKN-M46 per ZZ14?

A

Lose Normal CTRL PWR to NAN-S06 (manual transfer to M45) and Backup to S05
RCP’s lose CTRL PWR
Loss of PWR to DC EBOP’s (Turbine/FWPT)

83
Q

NNN-D12 lost and Plant >75% (per ZZ14)?

A

FWPT Suction indications are Lost
A and C CD PPS Mini-Flows FO (loss of suction pressure to FWPT’s - can’t see)
10 seconds = FWPT B Trips

IF RPCB happens, MN TURB runback and auto CEA open circuits are disabled

84
Q

Lose NNN-D15/16, how do we stabilize the plant per ZZ14?

A

Loss of Either FWPT A/B control cabinet, FWPT Control valves will Close
Manual Trip of FWPT and Ensure RPCB

85
Q

On a loss of NKN-M45, what CR annunciators are lost in each unit?

A 
U1/2 = Lose all Annunciator Panels (with SIAS)
U3 = 1/2 of the Annunciators (with SIAS)
86
Q

On a Loss of NNN-D12, what occurs with Rod Control and PZR LVL?

A

Lose Auto rod control and PZR LVL setpoint

LOIT SIM 2018 JCH (1 decks)

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