LOT 201.37 Class 1E 125VDC Flashcards Preview

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Flashcards in LOT 201.37 Class 1E 125VDC Deck (11):
1

LOT 201.37 Class 1E 125VDC


What is the maximum current and voltage that the class 1E battery chargers can output?

300 amps

140 VDC
Equalizing Charge is 135VDC - 137VDC

2

LOT 201.37 Class 1E 125VDC


Where are the components for the Class 1E 125VDC Train B (Channel III) physically located?

EAB 35'

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3

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.

4

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)

5

LOT 201.37 Class 1E 125VDC


Where are the components for the Class 1E 125VDC Train A (Channel I) and Train D (Channel II) physically located?

EAB 10'

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6

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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7

LOT 201.37 Class 1E 125VDC


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

4 hrs


Note:
Non-Class batteries will only last 2 hrs.

8

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

9

LOT 201.37 Class 1E 125VDC


What actions are required if one of the required Class 1E battery banks is inoperable while the plant is in MODE 1?

LCO 3.8.2 DC Sources Operating

Applicable in MODES 1 - 4


Action a:

Restore Inoperable battery bank [2 hrs]

OR

Apply CRMP [2 hrs]

OR

Be in MODE 3 [Next 6 hrs]
AND
Be in MODE 5 [Following 30 hrs]

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10

LOT 201.37 Class 1E 125VDC


Where are the components for the Class 1E 125VDC Train C (Channel IV) physically located?

EAB 60'

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11

LOT 201.37 Class 1E 125VDC


Where in the MCR is the indications for the Class 1E 125VDC system?

CP003

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