ML20092F899

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Rev 6 to Procedure 13415-1, Reserve Auxiliary Transformers
ML20092F899
Person / Time
Site: Vogtle Southern Nuclear icon.png
Issue date: 06/30/1989
From:
GEORGIA POWER CO.
To:
Shared Package
ML20092F288 List: ... further results
References
CON-IIT05-040-90, CON-IIT5-40-90, RTR-NUREG-1410 13415-1, NUDOCS 9202190548
Download: ML20092F899 (10)
v • d • e


Text

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g NUCLEAR OPERATIONS 13415-1 4

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l opyo go RESERVE AUXILIARY TRANSFORMERS 3i''

1.0

_ PURPOSE i

This procedure provides the necessary instructions for energizing and operating the Reserve Auxiliary Transformer (RAT).

following sections. Procedure instructions include the 4.1.1 Energizing The RAT 4.2.1 e

Transferring RAT Cooling Fan Electrical Power Source t

C.2 Crl_3 4.2.2 Cooling Fan Auto Operation L t.,

M 4.3.1 De-energizing The RAT C2::ll 4.4.1 4:3 Cooling Fan Manual Operation C:::

4.4.2 Restoring A RAT To Service 2.0 PRECAUTIONS AND LIMITATIONS 2.1 PRECAUTIONS 2.1.1 System Operator shall be responsible for providing proper switching instructions for energizing the RAT.

2.1.2 The Unit 2 Unit Shift Supervisor (USS) should be notified whenever switching operations for the RATS are to be performed.

i 2.2 LIM 5TATIONS.

2.2.1 Two physically independent circuits between the offsite t

transmission network and the onsite Class lE Distribution System shall be operable per Technical Specification 3.8.1.1.

2.2.2 One circuit between the offsite transmission network and the onsite Class lE Distribution System shall be operabic per Technical Specification 3.8.1.2.

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2.2.3 The maximum permissible continuous loading for the RAT 1st Primary winding is rated at 67,200kVA at 65'c a.

rise, i

b.

Secondary winding (13.8kV) is rated at 39,200kVA at 65'c rise, c.

Secondary winding (4160V) is rated at 28,000kVA at 65'C rise.

1 4

3.0 PREREQUISITES Aifj $3;F,W TTIONS 3.1 The System Operater ni !i be noeified of preparations being made to energite the RAT.

3.2 The 125V DC control pow ?r is available -to the RAT Circuit Switcher.

3.3 The Fire Protection Deluge System for the RAT's is available.

4.0 INSTRUCTIONS 4.1 STARTUP 4.1.1 Energizing The RAT 4.1.1.1 Prior. to energizing the RAT, VERIFY the following.

parameters and conditions by visually inspecting the tran sformer s Liquid level indication - WITHIN NORMAL BAND, a.

b.

Winding temperature indication - WITHIN NORMAL

BAND, Oil temperature indication - WITHIN NORMAL BAND, c.

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d.

' Bushing oil level indication - WITHIN NORMAL BAND, Transformer cooling fans in the AUTO position, e.

f.

No transformer oil leaks, Transformer Nitrogen Pressure - 0.5 to 6.5 psig.

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3 of 10 VERIFYOPNNthefollowingBusFeederBreakersforthe 4.1.1.2 transformer to be energized:

a.

RAT'1NXRA (1)

INAA01 13.8kV Switchgear

1NAA, (2)

INA0101 4160V Switchgear 1NA01 (3)

INA0501 4160V Switchgear

1NA05, (4) 1AA0205 4160V Switchgear 1AA02.

b.

RAT INXRB (1) 1 NAB 01 13.8kV Switchgear

INAB, (2) 1BA0301 4160V Switchgear 1BA03 (3)

INA0401 4160V Switchgear

1NA04, 4.1.1.3 ENSURE electrical power to the RAT cooling fans for the transformer to be energized is available as required.-

l a.

RAT INXRA (1)

Normal Supply - MCC INBN-05, anu/or (2)

Alternate Supply - MCC INEA-04, (3)

PLACE the Normal / Alternate Transfer Switch INBN05T in NORMAL or ALTERNATE as required.

b.

RAT INXRB (1)

Normal Supply - MCC 1NBA-04, and or (2)

Alternate Supply - MCC INBN-05, (3)

PLACE the Normal / Alternate Transfer Switch INBA04T in NORMAL or ALTERNATE as required.

4.1.1.4 CLOSE the RAT Cooling Fan Main Circuit Breaker at the RAT Control Cabinet INCPXRA (INCPXRB).

4.1.1.5 CLOSE the RAT Cooling Fan Control Circuit Breaker at INCPXRA (INCPXRB).

4.1.1.6 PLACE the Cooler Control Switch 43-1 and 43-2 at INCPXRA (INCPXRB) in AUTO.

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4 of 10 4.1.1.7 PLACE the Cooler Transfer Switch 43C at 1NCPXRA (1.NCPXRB) in POSITION 1.

4.1.1.8 PIACE th'e Heater Switch at INCPXRA (INCPXRB) in ON 4.1.1.9 ENERGIZE the RAT INXRA (INXRB) hi Operator switching instructions. gh side per System 4.2 SYSTEM OPERATION 4.2.1 Transferring RAT Cooling Fan Elcetrical Power Source 4.2.1.1 Transferring from Normal to Alternate Source a.

RAT INXRA PLACE the Normal and Alternate Power Feed Transfer Switch INBNOST to the ALTERNATF, position, b.

RAT INXRB PLACE the Normal and Alternate Power Feed Transfer Switch INBA04T to the ALTERNATE position.

4.2.1.2 Transferring from Alternate to Normal Source a.

RAT INXRA PLACE the Normal and Alternate Power Feed Transfer Switch INBN05T in NORMAL, b.

RAT INXRB PLACE the Normal and Alternate Power Feed Transfer Switch 1NBA04T in NORMAL.

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VEGP 13415-1 6

5 of 10 4.2.2 Cooling Fan Auto Operation NOTE I

Placing the Cooler Transfer Switch 43C at 1NCPXRA (INCPXRB) in POS 1 selects cooling Fan Group 1 (4-1) in lead and group 2 (4-2) in lag.

Placing 43C in POS 2 selects Group 2 (4-2) in lead and Group 1 (4-1) in lag.

4.2.2.1 VERIFY the Cooler Control Switch 43-1 and 43-2 at 1NCPXRA (INCPXRB) in AUTO.

4.3 SHUTDOWN 4.3.1 De-energizing The RAT 4.3.1.1 ALIGN the 13.8kV AC Electrical Distribution per the following:

If the RAT is supplying-the 13.8kV Switchgear a.

1NAA (1 NAB) and the UAT is available. ALIGN the 13.8kV switchgears from the UAT per 13420-1, "13.8kV AC Electrical Distribution System",

b.

If the RAT is su y

the 13.8kV Switchgear INAA (INAB) and is not available DE-ENERGIZEthe-13.8kVswitchgearper13d20-1, "13.8kV AC Electrical Distribution System".

4.3.1.2 TRANSFER the RAT Cooling Fan from the Normal to the Alternate electrical power source per Step 4.2.1.1 of this procedure.

4.3.1.3 ALIGN the 4160V AC Non IE Electrical Distribution per the following If the RAT is supplying the 4160V-AC Switchgear a.

INA01, INA05 (INA04) and the UAT is available, ALIGN the 4160V AC switchgears from the UAT per 13425-1, "4160V AC Non ad Electrical Distribution System",

b.

If the RAT is supplying the 4160V AC Switchgear 4

1NA01, INA05 (INA04) and the UAT is not available, DE-ENERGIZE the-4160V AC switchgear-per 13425-1, "4160V AC Non IE Electrical Distribution System".

4.3.1.4 If the unit is operating in Mode 4 or=above, ALIGN the 4160V AC 1E Switchgear 1AA02 (1BA03) from the Diesel Generator per 13427-1, "4160V AC 1E Electrical Distribution System".

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6 of 10 4.3.1.5 ff the unit is operating in Modos 5 or 6 DE-ENERGIZE the 4160V AC 1E Switchgear 1AA02 (1BA03)

"4160V AC 1E Electrical Distribution System".per 13427-1,

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4.3.1.6 DE-ENERGIZE the RAT INXRA (INXRB) high side per System Operator switching instructions.

4.4 NON PERIODIC OPERATION 4.4.1 Cooling Fan Manual Operation 4.4.1.1 PLACE the Cooler Control Switch 43-1 at INCPXRA (INCPXRB) in MAN.

4.4.1.2 PLACE the Cooler Control Switch 43-2 at INCPXRA (INCPXRB) in MAN.

4.4.1.3 VERIFY the appropriate Cooling Fans are running.

4 4.4.2 Restoring A RAT To Service 4.4.2.1 DETERMINE the probable cause of the loss of power as follows:

CHECK Annunciator Panels ALB-30 and ALB-32 on a.

QEAB, b.

CHECK the RAT Relays on the QPRP, If the Interposing Relay has tripped DISPATCH an c.

operator to the Switch House to (1)

CHECK for relay targets.

(2)

DEPRESS the MANUAL FAULT Pushbutton on the ERYD Fault Recorder.

RECORD time in Fault Recorder Log.

4.4.2.2 As directed by the' USS,. TRANSFER the common 480V AC and 4160V AC switchgears to the alternate power supply per the applicable system operating procedure.

4.4.2.3 When directed by the USS, RESET the applicable tripped relays.

(Reference 10007-C, " Reset Of Lockout Relays i

And Relay Targets", as required.)

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l 4.4.2.4 ENSURE UPEN the following Bus Feeder Breakers for the RAT to be. energized and NORMALIZE handswitch targets:

s.

RAT INXRA (1)

INAA-01 13.8kV Switchgear 1NAA, l

(2) 1NA01-01 4160V Switchgear 1NA01 (3) 1NA05-01 4160V Switchgear 1NA05 (4) 1AA02-05 4160V Switchgear 1AA02 (or 1BA03-05 4160V Switchgear 1BA03 if in service).

4 b.

RAT INXRB 4

(1) 1 NAB-01 13.8kV Switchgear 1 NAB, (2) 1NA04-01 4160V Switchgear 1NA04, (3) 1BA03-01 4160V Switchgear 1BA03 (or 1AA02-01 4160V Switchgear 1AA02 if in service).

4.4.2.5 If the RAT was lost due to a fault on a Unit 2 bus, CONTACT the Unit 2 Control Room to perform the followingt j

a.

For a trip of PCB's 161820 and 161920:

i (1)

OPEN Switcher 2IM1A, (2)

RESET Lockout Relay 486TA4 on Panel 2QPRP.

b.

For a trip of PCB's 161860 and 161960:

(1)

OPEN Switcher 2IM1B, (2)

RESET Lockout Relay 486TB4 on Panel 2QPRP.

4.4.2.6 ENERGIZE the RAT high side-per System Load Dispatcher switching instruction.

REFER to Table 1 as re for PCB synchronizing select switch positions. quired

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5.0 REFERENCES

5.1 ELEMENTARIES 5.1.1 AX3D-BA-L50R 230kV PCB No. 161720 5.1.2 AX3D-BA-L50X 230kV PCB No. 161820 5.1.3 AX3D-BA-L51T 230kV PCB No. 161960 5.1.4 AX3D-BA-L52H 230kV PCB No. 161760 5.1.5 AX3D-BA-L52P 230kV PCB No. 161860 5.1.6 AX3D-BA-L53B 230kV PCB No. 161920 5.1.7 1X3D-BH-853A

, RAT INXRA Cooling 5.1.8 1X3D-BH-B54A RAT INXRB Cooling 5.2 FSAR Section 8.1.2 5.3 Technical Manual 1X3AA02B-27 Type SL Core Form Substation Transformer 5.4 PROCEDURES 5.4.1 10007-C,

" Reset Of Lockout Relays And Relay Targets" 5.4.2 11903-C,

" Fire Water Protection System Normal Alignment" 5.4.3 13406-1, "125V DC Non IE Electrical Distribution System" 5.4.4 13420-1, "13.8KV AC Electrical Distribution System" 5.4.5 13425-1, "4160V AC Non IE Electrical Distribution System" 5.4.6-13426-C, "4160V AC Common Non IE Electrical Distribution System" 5.4.7 13427-1, "4160V AC 1E Electrical Distribution System" 5.4.8 13428-C, "480V AC Common Non IE Electrical Distribution System" i

5.4.9 13430-1, "480V AC Non IE Electrical Distribution System" Q3.dl

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5.5 Technical Specification 3.8.1.1 & 3.8.1.2 5.6 ONE LINE D'IAGRAMS 5.6.1 1X3D-AA-A01A Main One Line Unit 1 5.6.2 1X3D-AA-A01B Main One Line Unit I and Common 5.6.3 1X3D-AA-L50A 500KV and 230KV Substation END OF PROCEDURE TEXT e

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TABLE 1 NOTE Synchronizing Select switches may be selected to either Incoming (I) or Running (R) positions.

1.

To close a PCB, PLACE the listed Synchronizing Select switches to either of the listed positions:

'1' ICB Synchronizing Select Switch POSITION i

161860 0FF-SITE SOURCE il I or R WILSON R or I-161960 0FF-SITE SOURCE il I or-R

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230 Bus 2 R or I 161760 230 Bus 1 I or R

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R or I 161820 0FF-SITE SOURCE- #2 I or R AUTO TRANSFORMER #1 R or I 161920 0FF-SITE SOURCE #2 I or R 230 BUS 2 R or I 161720 AUTO BANK 1 i

230 Bus 1 I or R R or I i

2.

PLACE S closed.ynchronize Select switches in-OFF after PCB is e

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