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Flashcards in Test 1 Deck (91):
1

LOT 202.16 SGBD


What will cause a BDS Isolation signal?

SGNR Level - Low 2 [2/4 on 1/4]

SI

AMSAC

P-4 w/ Source Range Blocked


Shuts BDS ORC valves. (All SGs)

Must be manually reset on CP006.

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2

LOT 201.21 Containment Isolation


What causes a Feedwater Isolation Signal?

P-4 True:
Tave - Low (574 ˚F) [2/4]

No Permissives:
SI
P-14
S/G Level - High (87.5%) [2/4 on 1/4]


P-4 True: Rx Trip [2/2] AND Bypass Bkrs [2/2] open


Note:
Closes FWIVs, bypasses, FRVs, Low FRVs, trips MFP turbines, and trips turbine.

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3

LOT 201.24 Post Accident Sampling


What cools the Post Accident Sampling sample cooler?

CCW

4

LOT 202.33 RCB HVAC


Where in the MCR are the controls for the RCB HVAC system?

CP002
RCFC

CP022
Everything Else

5

LOT 201.21 Containment Isolation


Does charging isolate on a phase A containment isolation?

Yes


Seals do not isolate.

6

LOT 201.33 Non-Class DC


What powers the 48 VDC Battery Chargers?

MCC 1K2

MCC 1G8 (TSC DG)

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7

LOT 201.01 RCB


What is the design pressure of containment?

Internal:
56.5 psig
Between -0.1 and +0.3 psig
CNMT PRESS HI / LOW (CP002)
(LCO 3.6.1.4 Containment Internal Pressure)

External:
3.5 psig


Max expected for DBA is 41.2 psig

CNMT PRESS HI/LOW on CP002 will put you in LCO 3.6.1.4 Containment Internal Pressure.


Note:
Design temperature is 286 ˚F

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8

LOT 201.01 RCB


How many emergency sumps are in the RCB?

Three


Supplies LHSI, HHSI, and Containment Spray (CS)


Note:
Located on RCB -11' 3"

9

LOT 201.37 Class 1E 125VDC


How many battery chargers are in-service per channel on the Class 1E 125VDC system?

One Battery Charger


Class 1E battery charger output breakers are administratively controlled to prevent both breakers being closed at the same time. (Allowed for 15 mins for battery charger swapping)


Note:
Non-Class 1E 125VDC has both battery chargers connected.

10

LOT 203.25 ICS


Describe how U1118 measures feedwater flow if LEFM system is lost?

Switches to Corrected Venturi Input
AND
Starts 72 hr timer

Switches to Venturi Input when 72 hr timer expires 
OR 
> 10% drop in Rx power
Will bypass Corrected Venturi input and 72 hr timer
Power drop compares current Rx Power to captured LEFM Rx power


Correction Factors and Power level are captured when LEFM lost for Corrected Venturi Input.


Note:
Time Remaining changes from Cyan to Red when 6 hrs are remaining on clock.

11

LOT 201.35 Non-Class DGs


What trips the Flex DGs?

Engine Overspeed
(1980 rpm)

Lube Oil Pressure - Low
(73 psig)

Cooling Water Temperature - High
(215°F)

Coolant Level - Low
(sensor in upper portion of radiator)

Engine Overcrank [Lockout]
(3 cycles)

12

LOT 201.34 Non-Class 1E Vital 120 VAC


What powers the 25 kVA 120V UPS panels (DP005/DP006)?

Normal (Inverter):
125VDC Bus 1B

Alternate (VRT):
MCC 1J1 (DP005)
MCC 1J2 (DP006)


Note:
Unlike 20 kVA 120V UPS panels, the 25 kVA 120V UPS panels do NOT contain a rectifier.

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13

LOT 201.21 Containment Isolation


What will cause a Phase B CIS?

Containment Pressure - High 3 (9.5 psig) [2/4]

Manual [2/2 on 1/2] (CP002/CP005)


Reset located on CP002.


Note:

  • Initiates Containment Spray
    • ​Manual initiation will only open valves (Must manually start pump)
  • Isolates CCW to RCPs (6 Valves)

14

LOT 202.33 RCB HVAC


Which RCB HVAC subsystems are safety related?

RCFC

Normal / Supplementary Purge
CIVs / Piping to Rad Monitors

MSIV Cubicle Ventilation
AFW pump room fans

Containment Cubicle Exhaust Fans


RCFC P/S: (4 of 6 req)

  • 11A (LC E1A1)/12A (LC E1A2)
  • 11B (LC E1B1)/12B (LC E1B2)
  • 11C (LC E1C1)/12C (LC E1C2)

Exhaust Fans P/S: (2 of 4 req)

  • 27(MCC E1A4)
  • 28(MCC E1B4)
  • 29(MCC E1A2)
  • 30(MCC E1C4)

15

LOT 201.39 ESF DGs


What will auto start / stop the DC Standby Fuel Oil Pump?

Auto Start:
< 540 RPM w/ engine start signal

Auto Stop:
≥ 540 RPM AND > 25 psig header pressure


Power Supply: Non-Class 125VDC 1B

16

LOT 202.16 SGBD


What provides cooling for the BDS HXs?

Condensate

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17

LOT 201.34 Non-Class 1E Vital 120 VAC


What indications are available in the MCR for the Non-Class 1E Vital 120 VAC System?

CP003
DP048A Trouble (20 kVA)
DP005 Trouble (25 kVA)
DP006 Trouble (25 kVA)


No direct Control Room or ICS computer points for the 45 kVA system (DP003 and DP004). However, if DRPI (DP003) is lost we are susceptible to entering Tech Spec 3.0.3 condition.

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18

LOT 202.33 RCB HVAC


How many Rx Containment Fan Coolers (RCFC) are required to be operating?

4 of 6 units
LCO 3.6.2.3 Containment Cooling
5 of 6 units OPERABLE


Keeps containment ≤ 110 ˚F during normal operation and during spray. (LCO 3.6.1.5 Containment Air Temperature)

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19

LOT 201.39 ESF DGs


What ESF DG pumps are engine driven?

Shaft Driven Lube Oil

Shaft Driven Fuel Oil

Shaft Driven Jacket Water

HP Fuel Injection Pumps
Driven off cam shaft

20

LOT 201.01 RCB


What is the containment average air temperature limit as required in LCO 3.6.1.5 Contaiment Air Temperature?

≤ 110 ˚F


Determined by looking at running RCFC inlet temperatures.

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21

LOT 201.23 Primary Sampling


What is the purpose of the RCS sample delay coil?

Limits short-lived activity product exposure (N-16)

22

LOT 201.31 13.8 kV / 4.16 kV Electrical


What provides control power for the RCP breakers?

125 VDC Bus 1B


Feeder breakers for the 13.8 kV Aux Buses are from the 125 VDC Bus 1A.

Precludes the possibility of losing both primary and backup protection of the containment penetration conductors for the RCPs?

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23

LOT 201.21 Containment Isolation


What will cause a Phase A CIS?

SI
P-11 False:
PZR Pressure - Low (1857 psig) [2/4]
Steam Pressure - Low (735 psig) [2/3 on 1/4]

No Permissives:
Containment Pressure - High (3.0 psig) [2/3]
Manual [1/2] (CP001/CP005)

Manually [1/2] (CP002/CP005)


P-11 False: PZR Pressure ≥ 1985 psig [1/3]

Reset located on CP002.


Note:
Will effect systems not safety related. (i.e IA to RCB)

24

LOT 201.37 Class 1E 125VDC


What is the minimum Individual Cell Voltage (ICV) allowed on the Class 1E batteries?

2.07 VDC
LCO 3.8.2.3 Battery Parameters


Battery overall voltage must be ≥128.03 VDC to make battery OPERABLE. (59 cells x 2.17 avg volts/cell)

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25

LOT 201.01 RCB


Which containment radiation monitor(s) are/is covered by tech specs for RCS leak detection?

RCB Atmosphere Monitor RE-8011 (Particulate)


LCO 3.4.6.1 RCS Leak detection

Applicable in MODES 1 - 4

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26

LOT 201.37 Class 1E 125VDC


What powers the Class 1E 125VDC Buses (E1A11/E1B11/E1C11/E1D11)?

Channel I:
E1A11: E1A1 / E1A2

Channel II:
E1D11: E1A4 / E1A1

Channel III:
E1B11: E1B1 / E1B2

Channel IV:
E1C11: E1C1 / E1C2


1 2 4 1 1 2 1 2

27

LOT 201.34 Non-Class 1E Vital 120 VAC


What powers the 45 kVA 120V UPS Panels (DP003/DP004)?

Normal (VRT):
MCC 1L1 (DP003)
MCC 1L2 (DP004)

B/U (VRT)
MCC 1G8


Note:
45 kVA 120V UPS Panels do NOT have rectifiers, inverters, or batteries. It's backup is the TSC DG.

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28

LOT 203.05 Well Water


What does well water supply?

Seals for River Makeup pumps

Makeup to ECW pond
WW-0013 provides isolation

Makeup to Freshwater settling basin

Emergency makeup to firewater


Note:
Relief goes to the main cooling reservoir.

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29

LOT 201.30 Offsite Electrical


Which switchyard breakers can be operated from the control room?

Unit 1:
Y510 / Y520

Unit 2:
Y590 / Y600


Isolates the Main Transformer from the switchyard.


Note:
Visual Indication on CP007 AND CP010. Operable from CP007 ONLY.

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30

LOT 201.21 Containment Isolation


What causes a containment ventilation isolation (CVI) signal?

No Permissives:
SI
Radiation - High (RT8012/RT8013) [1/2]

Manual:
Containment Phase A [1/2]
(CP002/CP005)
Containment Phase B [2/2 on 1/2]
(CP002/CP005)


Reset located on CP022.


Note:
Isolates Containment Normal and Supplemental Purge Systems and Containment Airborne Activity Monitor (RT-8011)

31

LOT 201.35 Non-Class DGs


What trips the TSC DGs?

Engine Overspeed
≈ 110% (1980 rpm)

Lube Oil Pressure - Low
(30 psig)

Cooling Water Temperature - High
(210 ˚F)

Loss of Excitation
(≥ 2 sec)

Overcurrent
(300 Amps)

Phase Differential [Lockout]

Engine Over crank [Lockout]
(3 cycles)

32

LOT 202.16 SGBD


Where in the S/G does blowdown take suction?

Normal:
Just above tubesheet
96 gpm

High Flow B/D:
Downcomer
190 gpm (1 SG at a time)

33

LOT 202.33 RCB HVAC


What is the temperature limit of the IVC as required by TRM 3.7.13 Air Temperature Monitoring?

≤ 104 ˚F
Shall not exceed for > 8 hrs OR > 30 ˚F

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34

LOT 201.33 Non-Class DC


What powers the 125VDC Bus 1B Battery Chargers?

MCC 1A5

MCC 1G8 (TSC DG)

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35

LOT 201.31 13.8 kV / 4.16 kV Electrical


What happens if you are paralleling across a 13.8 kV tie breaker and forget to open the breaker?

1F / 1G / 1H Tie - STBY
15 sec alarms
30 sec opens the tie breaker
30.5 sec opens Aux / STBY incoming breakers AND the ESF Feeder Breakers

1F / 1G / 1H STBY - STBY
15 sec alarms
30 sec opens other unit's STBY Breaker
30.5 sec opens Tie / Unit's STBY incoming breakers AND the ESF Feeder Breakers
Does NOT open Aux incoming breaker

1J AUX - STBY
15 sec alarms
30 sec opens Aux Breaker
30.5 sec both STBY incoming breakers trip

1J STBY - STBY
15 sec alarms
45 sec opens other unit's STBY Breaker
45.5 opens unit's STBY breaker and AUX breaker

36

LOT 201.30 Offsite Electrical


Which switchyard lines are not allowed to be counted toward tech specs?

Blessing 44 Line
Limited capability to provide required voltage

138 KV Blessing Line
Lines run below other lines

HILLJE 64 Line
Lines run below other lines

HILLJE 44 Line
Lines run below other lines

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37

LOT 201.38 Class 1E 120VAC


What powers the class 1E 120V distribution panels (DP001/DP002, DP1201/DP1202/DP1203/DP1204)?

DP001:
Primary / Secondary / Battery
E1A1 / E1A1 / E1A11

DP1201:
Primary / Secondary / Battery
E1A2 / E1A1 / E1A11

DP1202:
Primary / Secondary / Battery
E1A4 / E1A4 / E1D11

DP1203:
Primary / Secondary / Battery
E1B1 / E1B1 / E1B11

DP1204:
Primary / Secondary / Battery
E1C4 / E1C2 / E1C11

DP002:
Primary / Secondary / Battery
E1C2 / E1C2 / E1C11


Note:
Primary source is through the inverter / rectifier. Secondary is through the VRT.

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38

LOT 201.30 Offsite Electrical


What provides control power for the Main Generator Breaker?

TB 250VDC 1A


Note:
Control power for the 13.8 kV breakers will come from either 125VDC Bus 1A or 1B. (Non-Class 125VDC busses)

39

LOT 201.31 13.8 kV / 4.16 kV Electrical


What is the order of 13.8 kV Aux Bus restoration?

F, G, H, J


Chosen b/c DP401 and DP402 are fed from F & G, which power CP010 metering.

40

LOT 201.33 Non-Class DC


What is powered by 250 VDC Bus 1A?

TG Lube Oil EOP

Air Side Seal Oil Back-up Pump

SGFPT Emergency Oil Pumps

Generator Breaker Control Panel/Power

41

LOT 201.35 Non-Class DGs


What loads does the TSC DG supply?

ICS Computer

CVCS PDP

FHB IVC LTG XFMRs

RCB Equipment Hatch Hoist
Flex DG provides B/U power

Emergency XFMR cooling fans


Feeds 4.16 kV LC 1W1 → MCC 1G8

4.16 kV / 1200 kW / 1800 RPM


Note:
Auto Starts on loss of voltage, comes up to speed and closes breaker in 15 seconds

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42

LOT 201.21 Containment Isolation


What types of lines require containment isolation?

Lines that form part of RCPB

Lines that connect to containment atmosphere

Lines that are part of a closed system

43

LOT 201.30 Offsite Electrical


What will happen in the switchyard if a fault occurs on the standby transformer?

Unit 1:
All North Side breakers will trip

Unit 2:
All South Side breakers will trip

44

LOT 201.39 ESF DGs


What is the rated speed, power, and voltage of the ESF DGs?

600 RPM

5500 kW (Continuous)
108% (83 days)
110% (7 days)

4.16 kV ± 10%


Note:
ESF DGs will restore power to Class 1E buses in 10 secs following a LOOP.

45

LOT 201.39 ESF DGs


What is the purpose of the reset and release pushbuttons on CP003?

Q image thumb

Reset:
Resets all Normal DG Trips

Release:
Switches DG from Emergency Mode → Normal Mode
Switches from Isoch Mode → Parallel Mode


Must press Reset button, verify master trip circuit reset light illuminated, and then release ESF DG from Emergency Mode. (DG will trip if not done)


Note:

  • If Normal Trip was received in Emergency Mode, DG will stop immediately once Stop pushbutton pressed. (No 5 min C/D)
  • This will occur even if Reset pushbutton pressed.

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46

LOT 201.33 Non-Class DC


What powers the 125 VDC bus 1A and 250 VDC bus 1A battery chargers?

MCC 1G1

MCC 1G5 (BOP DG)

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47

LOT 201.30 Offsite Electrical


Which 13.8 kV switchgears are normally powered from the standby transformers while at power?

1G STBY Bus 

2G STBY Bus


Loss of North Bus starts SDG 12

Loss of South Bus starts SDG 22

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48

LOT 201.01 RCB


What containment parameters are monitored in the MCR?

CP002:
Temperature
Humidity

CP004:
Normal / Secondary Sumps

CP005:
Personnel Airlock Seals OCIVs
Airlock Alarms
Contaiment Pressure Alarms (High / High 3)
Normal / Secondary Sumps (Alarms)

CP018:
Pressure Recorder
Hydrogen Recorder

Normal / Secondary Sump Recorder

QDPS / ICS:
Pressure
Radiation (ICS / RM-11 / RM-23)
Normal / Secondary Sumps (QDPS ONLY)

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49

LOT 201.39 ESF DGs


What pressure in the starting air receivers will make the ESF DGs INOPERABLE?

 < 175 psig in BOTH


5 consecutive starts w/o recharge.

50

LOT 201.36 Class 1E 4.16kV/480V


What powers the RHR pumps, SFPC pumps, and the B/U PZR heaters?

RHR:
A: E1A2
B: E1B2
C: E1C1

SFPC:
A: E1B1
B: E1C1

PZR B/U Heaters:
A: E1A1
B: E1C1

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51

LOT 201.24 Post Accident Sampling


What does the post accident sampling system sample during post accident conditions?

RCS
RHR/SI
Containment Normal Sump
Containment Air


4 lines enter containment at 68' FHB

OCIVs close on phase A CIS


Note:
Liquid goes to PRT and Gas goes back to containment.

52

LOT 201.35 Non-Class DGs


What loads does the BOP diesel supply?

Battery Chargers 125V/250V

IA Compressor 14

Turning gears for MFPs and Main Turbine

Bearing Oil Lift Pump

Air Side Seal Oil Pump


Feeds MCC 1G5

BOP, NTF, and Security LTG DGs: 480 VAC / 700 KW / 1800 RPM


Note:

  • BOP DG Fuel Tank will last 60 mins
  • Auto Starts on loss of voltage, comes up to speed and closes breaker in 15 seconds

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53

LOT 201.35 Non-Class DGs


When will the Non-Class DGs trip on overspeed?

BOP / NTF / LTG:
2073 RPM
≈115% of 1800 RPM

TSC / Flex:
1980 RPM
110% of 1800 RPM


Note:
TSC DG also equiped with device to prevent overloading TSC DG during S/U. (Puts TDs on when loads can be started)

54

LOT 201.39 ESF DGs


What cools the jacket water and lube oil HXs?

Essential Cooling Water (ECW)


Jacket Water is at a higher pressure than ECW

Also cools the Turbo Charger Exhaust Air Inter Coolers (2 / DG)

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55

LOT 201.36 Class 1E 4.16kV/480V


What colors correlate to the different Class 1E trains?

Train A:
Red
Same color as Channel I

Train B:
Blue
Same color as Channel III

Train C:
Yellow
Same color as Channel IV


Channel II is White.

56

LOT 201.35 Non-Class DGs


How are the Non-Class DGs started?

BOP / NTF / LTG:
Two 24 VDC Electric Starting Motors
Rated for 10 Starts

Flex:
One 24 VDC Electric Starting Motors

TSC:
Air Driven Starting Motor (90 - 120 psig)

57

LOT 201.23 Primary Sampling


What cools the primary sampling system sample coolers?

CCW

58

LOT 201.39 ESF DGs


What will auto start the standby jacket water pump?

≥ 540 RPM AND < 6 psig header pressure
Blocked for 20 sec on S/U


Once started must manually secure pump

Powered: Class 1E 480V MCC

  • Same as standby LO pump

59

LOT 201.01 RCB


What must IA header pressure to the airlock seals be in order to make the personnel airlock OPERABLE?

≥ 90 psig


Cannot decay more than 0.5 psig in 8hrs.

Cannot decay more than 1.5 psig in 24 hrs.


Note:
LCO 3.6.1.3 Containment Airlocks is APPLICABLE in MODES 1 - 4.

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60

LOT 203.25 ICS


Which color codes correlate to Priority 1 - Priority 4 alarms?

Priority 1:
Red

Priority 2:
Magenta

Priority 3:
Yellow

Priority 4:
White

61

LOT 202.33 RCB HVAC


What cools the RCFC AHUs?

Normal:
RCB Chilled Water

Emergency:
CCW

62

LOT 201.21 Containment Isolation


What will cause a SL Isolation Signal?

≥ P-11:
Steam Pressure - Low (735 psig) [2/3 on 1/4]

< P-11:
Steam Pressure Rate - High (100 psig w/ 50 sec TC) [2/3 on 1/4]

No Permissive:
Containment Pressure - High 2 (3.0 psig) [2/3]
Manual [1/2] (CP005/CP006)


P-11: PZR Pressure < 1985 psig [2/3]

Resets located on CP005/CP006.


Note:
Isolates MSIVs and MSIV bypass valves.

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63

LOT 201.31 13.8 kV / 4.16 kV Electrical


What are some major loads powered from the 1D Loadcenters?

RCB/MAB Chillers

OLACW Pumps

Low Pressure Heater Drip Pumps

BTRS Chiller
May or May not be abandoned

64

LOT 201.30 Offsite Electrical


Procedurally, what is the current rating of the standby transformer windings?

1621 Amps / Winding


Equivalent to 2 Aux Busses and all 6 ESF busses fully loaded.

65

LOT 201.31 13.8 kV / 4.16 kV Electrical


What major loads are powered from the 13.8 kV Aux Buses?

RCPs

Condensate Pumps

CW Pumps

FW Booster Pumps

1D1/1D2 Load Centers

66

LOT 201.01 RCB


What will a containment pressure of ≥ 3.0 psig cause?

Containment Pressure - High (3.0 psig) [2/3]
Safety Injection
Reactor Trip
Containment Isolation Phase A
Containment Ventilation Isolation
FW Isolation

Containment Pressure - High 2 (3.0 psig) [2/3]
SL Isolation


Uses PT-934, 935, 936 ONLY


Note:
Containment Pressure - High and High 2 are the exact same setpoint....

67

LOT 201.38 Class 1E 120VAC


What does DP001/DP002 power?

QPDS displays

Multiple Radiation Monitors


Note:
DP001/DP002 uses 25 kVA Inverter and 20 kVA VRT.

68

LOT 201.36 Class 1E 4.16kV/480V


Which XFMR(s) have an automatic load tap changer?

UATs
Located on CP010

B ESF XFMRs
Located on CP003
B Class 1E buses receive power from standby XFMR which doesn't have load changer


As Switchyard voltage lowers, load changer will adjust XFMR tap to raise bus voltage back up.

Will recover bus voltage to >3920 Volts within 35 seconds from a minimum switchyard voltage of 327.8 kV

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69

LOT 201.31 13.8 kV / 4.16 kV Electrical


Where is the SUFW powered from?

1H Standby Bus


Note:
Unique b/c it is powered from the standby bus and NOT the aux bus.

70

LOT 203.25 ICS


Which lampboxes are covered by tech specs?

Lampbox 5M03 D3 (AFD HI)

Lampbox 5M03 D5 (Rod Supv Mntr Rod Position TRBL)

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71

LOT 201.34 Non-Class 1E Vital 120 VAC


What powers the 20 kVA 120V UPS panels (DP048A)?

Normal Power (Rectifier & Inverter):
MCC 1F4

B/U DC (Inverter):
125 VDC 1A

B/U AC (VRT):
MCC 1G1

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72

LOT 201.39 ESF DGs


What is the minimum level required in each ESF DG fuel oil storage tank?

60,500 gallons
LCO 3.8.1.1 AC Sources - Operating
LCO 3.8.1.2 AC Sources - S/D
LCO 3.8.1.3 AC Sources - S/D


Capacity: 70,000 gallons


Note:
Will last for 7 days (≥ 60,500 gallons)

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73

LOT 201.01 RCB


What will a containment pressure of ≥ 9.5 psig cause?

Containment Pressure - High 3 (9.5 psig) [2/4]:
Containment Spray Actuation
Containment Isolation Phase B


Uses PT-934, 935, 936, AND 937


Note:
Containment Pressure - High and High 2 use PT-934, 935, and 936 ONLY

74

LOT 201.39 ESF DGs


What will trip the ESF DGs while operating in Emergency Mode?

Engine Overspeed
660 RPM (110%)

Generator Differential

Turbo / Engine Lube Oil - Low [1/2 on 2/2]
Normal Mode [1/2 on 1/2]

Emergency Stop Pushbutton [2/2]
ZLP-102

Emergency Stop Plunger pulled out
CP003

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75

LOT 201.01 RCB


How is the fuel transfer tube sealed for containment purposes?

RCB Side:
Double-gasketed blind flange

FHB Side:
Gate Valve

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76

LOT 201.32 Non-Class 480V


What provides control power to load centers?

125 VDC Control Power


MCCs provide their own control power.

77

LOT 201.39 ESF DGs


What will auto start the standby lube oil pump?

Auto Start:

≥ 540 RPM AND < 35 psig header pressure


Once started must manually secure pump

Powered: Class 1E 480V MCC

  • Same as standby JW pump

78

LOT 202.46 Aux Fuel Oil Storage & Transfer


What indications are there in the MCR for the Aux Fuel Oil Storage System?

CP003
Standby DG Fuel tank level

CP009
Aux Boiler Trouble

79

LOT 201.35 Non-Class DGs


What auto starts the Non-Class DGs?

BOP / NTF / LTG / TSC:
Bus Undervoltage
2 sec from UV to breaker shutting
Auto start blocked if feeder breaker tripped on Overcurrent

Flex:
No auto starts


BOP / NTF / LTG / TSC:

  • Switch has 3 positions - Hand / OFF / AUTO
    • Auto allows UV start
    • OFF prevents start (TSC 5 min C/D)
    • Hand starts DG in manual (TSC requires pressing start button in addition to Hand)

Note:
Pushing the Manual Auto to Bypass Pushbutton allows going from Hand to Auto w/o shutting down DG.

80

LOT 201.23 Primary Sampling


What chemicals are added to the primary?

H2
pH w/ Φgamma and O2 control
Added to VCT

Hydrazine
pH w/o Φgamma and O2 control
Added to CVCS chemical mixing tank

LiOH
Minimizes corrosion and buildup of crud
Added to CVCS chemical mixing tank

Boric Acid
Added to CVCS Charging pump suction

81

LOT 202.16 SGBD


What is the allowable primary → secondary leakeage?

≤ 150 gpd


Considered identified leakage.

LCO 3.4.6.2 Operational Leakage

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82

LOT 201.32 Non-Class 480V


What MCCs are Non-Class, but are supplied by Class 1E MCCs?

1A5, 1B5, and 1C5


They are shed during emergencies by the sequencer.

Located in EAB 10' (1A5), EAB 35' (1B5), EAB 60' (1C5) in the pen space.

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83

LOT 202.16 SGBD


What will cause the BDS Flash Tank steam to re-align from FW HTRS 13A/13B to the main condenser?

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Turbine Trip

OR

High 2 level in FW HTR 13A AND 13B


High 2 level in one FW HTR will shut isolation valve for that FW HTR but steam will still be supplied to the other FW HTR.

84

LOT 201.37 Class 1E 125VDC


What are some loads powered from the Class 1E 125VDC system?

Train A/B/C:

(A / B ONLY)
Rx Trip Breaker Control Power
PZR PORVs

ESF DGs:
Field Flash
Sequencers (A/B/C)
PL-139A/B/C (DG Control Panels)

ESF:
4.16 kV / 480V ESF Control Power
PL-39A/B/C (EAB)

Class 1E 120V Inverters

Train D:

Terry Turbine MOVs
PL-40A (EAB)
Class 1E 120V Inverter (1202)

85

LOT 201.39 ESF DGs


What jacket water temperature will make the ESF DGs INOPERABLE?

< 100 ˚F


Lube Oil Temperature of < 100 ˚F will also make the ESF DG INOPERABLE

86

LOT 201.33 Non-Class DC


How long will the Non-Class 1E batteries last on a loss of battery charger power?

2 hrs


Will fully recharge in 12 hrs


Note:
Class 1E batteries will last 4 hrs.

87

LOT 202.46 Aux Fuel Oil Storage & Transfer


Describe the flowpath of the aux fuel oil storage & transfer system?

FO Tank → Strainer → Pump → Header

88

LOT 201.36 Class 1E 4.16kV/480V


What supplies power to the Non-Class 1E MCC's 1A5/1B5/1C5?

MCC 1A5:
Class 1E MCC E1A4

MCC 1B5:
Class 1E MCC E1B4

MCC 1C5:
Class 1E MCC E1C4


MCC's are Non-Class powered by Class 1E


Note:
Despite being odd number, Non-Class MCCs are powered by EVEN Class MCCs.

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89

LOT 201.36 Class 1E 4.16kV/480V


What is powered from the Class 1E 4.16 kV Buses (E1A, E1B, E1C)?

Common to all: (Makes Sense)
Spells Leaches

LHSI (A/B/C)
ECW (A/B/C)
AFW (1/2/3)
CCW (A/B/C)
HHSI (A/B/C)
EAB Essential Chiller (A/B/C)
Containment Spray (A/B/C)

Different: (Doesn't Make Sense)

E1A: CCP 1B
E1C: CCP 1A

90

LOT 201.35 Non-Class DGs


What trips the BOP / NTF / LTG DGs?

BOP / NTF / LTG:

Engine Overspeed
≈ 115% (2073 rpm)

Lube Oil Pressure - Low
(20 psig)

Cooling Water Temperature - High
(210 ˚F)

Generator Overcurrent
(2400 amps)

Generator Volts/Hertz NOT within Limits
(2.2 V/Hz for greater than 15 seconds)
N/A for Unit 2 BOP AND NTF

Engine Over crank [Lockout]
(3 cycles)

Ground Fault (NTF ONLY)

91

LOT 201.35 Non-Class DGs


What loads does the Flex diesel supply?

Normal:
Flex RCS M/U Pumps
Flex S/G M/U Pumps
Flex SFP M/U Pumps

Backup:
CVCS PDP
RCB Equipment Hatch Hoist
B/U to TSC DG
480V ESF LC and MCC


Supplies 480V LC DP1000

480 V / 1000 kW / 1800 RPM


Note:
Within 8 hours following an Extended Loss of AC Power (ELAP) the FLEX Diesel Generator will be running providing power to support SG make-up, RCS make-up, SFP make-up, and other functions in support of STP's FLEX strategies.

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