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AP-ELEC. 2

TITLE:

SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOWFREQUENCY

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ROCHESTER GAS AND ELECTRIC CORPORATION

GINNA STATION

CONTROLLED*COPY NUMBER

TECHNICAL REVIEW

PORC REVIEW DATE eP $ 0

T SUPERIN N NT

F29 $ 0EFFECTIVE DATE

OA~ ROE-QA CATEGORY 1.0GINNASTATION

START:REVIEWED BY: DATE

TIME

COMPLETED;

DATE

TIME'

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A. PURPOSE - This procedure provides actions to be takenif safeguards bus (14, 16, 17, and 18) voltage decreasesto less than 420 V, or if system frequency decreases toless than 59.9 Hz.

B. ENTRY CONDITIONS/SYMPTOMS

2. SYMPTOMS — The symptoms of SAFEGUARDS BUSSES LOW VOLTAGEOR SYSTEM LOW FREQUENCY are;

a. Any Safeguard bus voltmeters Bus 14, 16, 17, or 18,less than 420 V.

b. Power Control notifies Ginna Control Room that systemfrequency is less than 59.9 Hz.

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STEP ACTION/BXPECTED RESPONSE RBSPONSE NOT OBTAINBD

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *CAUTION

o THE DIESELS SHOULD NOT BE OPERATED AT IDLE OR MINIMUM LOAD FOR EXTENDED

PERIODS OF TIME.

o IF THE DIESELS ARE SHUT DOWN, THEY SHOULD BB PRBPARED FOR RESTART.

NOTE: A minimum of 10,000 gal of fuel oil must be on site when the reactoris critical.

1 Check Safeguards BusVoltages:

o Safeguards busses 14; 16, 17,and 18 voltage - GREATER THAN420 VOLTS

IF any safeguards bus voltage lessthan 420 volts, THEN, start both .

emergency D/Gs and continue tomonitor voltage.

IF any safeguards bus voltagedecreases to less than 414 volts,THEN, go to Step 4.

2 Check with Power Control ToVerify System Frequency—GREATER THAN 59.9 Hz

IF system frequency less than 59.9Hz, THEN, start both emergency D/Gsand continue to monitor frequency.

IF system frequency decreases toless than 58.5 Hz, THEN, go toStep 4.

3 Establish Monitoring Of-SAFEGUARDS BUS VOLTAGE/SYSTEMFREQUENCYi AND GO TO STEP 14

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4 Check Status of D/Gs:

a. Unit/parallel operation selector- IN UNIT POSITION

b. Voltage control - IN AUTO

c. Voltage - APPROXIMATELY 480VOLTS

d. Frequency - APPROXIMATELY 60 HZ

a. Place D/G unit/paralleloperation selector in UNITposition.

b. Place voltage control in AUTO.

c. Adjust auto voltage controlrheostat to obtain 480 volts.

d. Ad5ust governor control to raiseor lower D/G speed to obtain 60HZ.

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*****************************************CAUTION

OBSERVE D/G LOADING LIMITS OP 2300 KW FOR 1/2 HOUR, 2250 KW FOR 2 HOURS, AND

1950 KW POR CONTINUOUS SERVICE.

5 Complete Transfer OfSafeguards Busses To TheEmergency D/Gs AndRestoration Of RequiredEquipment. As Follows:

a. Complete - THE TRANSPER OP THE"B" INSTRUMENT BUS TO ITSMAINTENANCE SUPPLY

b. Bus 14 transfer:

1) Open - BUS 14 NORMAL FEED480V BREAKER

2) Verify - D/G "A" BUS 14SUPPLY BREAKER CLOSES

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(Step 5 continued from previous page)

3) Check and restore equipmentlost during bus transfer:

o Charging pumps restored asrequired

o PRZR htrs restored asnecessary

o RHR pump restored asrequired

o MCCs restored as required

o CV fan coolers restored asrequired

o CCW pump restore'd asrequired

o Aux FV pump restored asrequired

This Step continued on the. next page.

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(Step 5 conti'nued from previous page)

c. Bus 16 transfer:

1) Open - BUS 16 NORMAL FEED480V BREAKER

2) Verify - D/G "B" Bus 16SUPPLY BREAKER CLOSES

3) Check and restore equipmentlost during bus transfer:

o Charging pumps restored asrequired

o PRZR backup htrs restoredas required

o RHR pump restored asrequired

o MCCs restored as required

o CV fan coolers restored asrequired

o CCV pump restored asrequired

o Aux FV pump restored asrequired

This Step continued on the next page.

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(Step 5 continued from previous page)'

d. Bus 17 transfer:

1) Open - BUS 17 NORMAL FEED480V BREAKER

2) Verify - D/G "B" BUS 17SUPPLY BREAKER CLOSBS

3) Check and restore equipmentlost during bus transfer:

o SW pumps restored asrequired

o MCCs restored as required

o Fire pump restored asrequired

e. Bus 18 transfer:

1) Open - BUS 18 NORMAL FEED480V BREAKER

2) Verify - D/G "A" BUS 18SUPPLY BREAKER CLOSES

3) Check and restore equipmentlost during bus transfer:

o SW pumps restored asrequired

o MCCs restored as required

f. Complete - THE TRANSFER OF THE"B" INSTRUMENT BUS BACK TO ITSNORMAL SUPPLY

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6 Verify Status Of EquipmentRequired For Current PlantConditions:

o Charging pumps - OPERATING ASREQUIRED

o SV pumps - OPERATING AS REQUIRED

o CCV pumps - OPERATING ASREQUIRED

o PRZR heaters - OPERATING ASREQUIRED

o RHR pumps - OPERATING ASREQUIRED

o MCCs - ALL ENERGIZED

o CV fan coolers - OPERATING ASREQUIRED

o Fire pump breaker - CLOSED ASREQUIRED

o Aux FV pumps - OPERATING ASREQUIRED

'IF required equipment NOT

operating, THEN start equipment asnecessary.

7 Check D/G OperationPeriodically:o D/G voltage - AT APPROXIMATELY

480V

IF D/G voltage/frequency NOT asdesired, THEN ad)ust D/Gvoltage/frequency as necessary.

o D/G frequency - AT APPROXIMATELY60 HZ

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8 Establish Monitoring Of D/Gs:

o Running D/G(s) - TAKE HOURLY LOG

READINGS

NOTE: Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reportingrequirments.

9 Complete — NOTIFICATION TOHIGHER SUPERVISION

10 Establish Conditions ToReturn Safeguards Busses ToNormal Power Supplies:

o Check voltage/frequency

o All safeguards busses voltage-GREATER THAN 420 VOLTS

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o System frequency - GREATER THAN59.9 Hz

o Cause of degraded condition-KNOWN AND CORRECTED

Return to Step 7.

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ll Remove the "A" D/G FromService And Restore RequiredEquipment As Follows:

a. Complete - THE TRANSFER OF THE"B" INSTRUMENT BUS TO ITSMAINTENANCE SUPPLY

b. Bus 14 transfer:C

1) Manually hold closed - BUS 14NORMAL FEED 480V BKR SWITCH

2) Open - "A" D/G BUS 14 SUPPLYBREAKER

3) Verify - BUS 14 NORMAL FEED480V BKR CLOSES

4) Check and restore equipmentlost during bus transfer:

o Charging pumps restored asrequired

o PRZR htrs restored asrequired

o RHR pumps restored asrequired

o MCCs restored as required

o CV fan coolers restored asrequired

o CCV pump restored asrequired

o Aux FV restored asrequired

3) IF normal feed bkr fails toclose, THEN verify D/G supplybkr closes back in andinvestigate.

This Step continued on the next page.

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(Step 11 continued from previous page)

c. Bus 18 transfer:

1) Manually hold closed - BUS 18NORMAL REED 480V BKR SWITCH

2) Open - "A" D/G BUS 18 SUPPLYBREAKER

3) Verify - BUS 18 NORMAL FEED480V BKR CLOSES

4) Check and restore equipmentlost during bus transfer:

o SW pumps restored asrequired

o MCCs restored as required

d. Stop - THE "A" D/G AND ALIGN FORAUTO STANDBY (Refer toATTACHMENT D/G STOP)

e. Complete - THE TRANSFER OF THE"B" INSTRUMENT BUS BACK TO ITSNORMAL SUPPLY

3) IR normal feed bkr fails toclose, THEN verify D/G supplybkr closes back in andinvestigate.

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12 Remove The "B" D/G FromService And Restore RequiredEquipment As Follows:

a. Bus 16 transfer:

1) Manually hold closed - BUS 16NORMAL PEED 480V BKR SVITCH

2) Open - "B" D/G BUS 16 SUPPLYBRBAKER

3) Verify - BUS 16 NORMAL FBED480V BKR CLOSES

4) Check and restore equipmentlost during bus transfer:

o Charging pumps restored asrequired

o PRZR htrs restored asrequired

/

o RHR pump restored asrequired

o MCCs restored as required

o CV fan coolers restored asrequired

o CCV pump restored asrequired

o Aux PV pump restored asrequired

3) IF normal feed bkr fails toclose, THEN verify D/G bkr,closes back in andinvestigate.

This Step continued on the 'next page.

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(Step 12 continued from previous page)

b. Bus 17 transfer:

1) Manually hold closed - BUS 17NORMAL FEED 480V BKR SVITCH

2) Open - "B" D/G BUS 17 SUPPLYBREAKER

3) Verify - BUS 17 NORMAL FEED480V BKR CLOSES

4) Check and restore equipmentlost during bus transfer:

o SV pumps restored asrequired

o MCCs restored as required

c. Stop - THE "B" D/G AND ALIGN FOR

AUTO STANDBY (Refer toATTACHMENT D/G STOP)

3) IF normal feed bkr fails toclose, THEN verify D/G bkrcloses back in andinvestigate.

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13 Verify Status Of EquipmentRequired For Current PlantConditions:

o Charging pumps - OPERATING ASREQUIRED

o SW pumps - OPERATING AS REQUIRED

o CCV pumps - OPERATING ASREQUIRED

o PRZR heaters - OPERATING ASREQUIRED

o RHR pumps - OPERATING ASREQUIRED

o MCCs - ALL ENERGIZED

o CV fan coolers - OPERATING ASREQUIRED

o Fire pump breaker - CLOSED ASREQUIRED

IF required equipment NOT

operating, THEN start equipment asnecessary.

14 Verify Safeguards BusVoltage/System FrequencyNormal:

o All safeguards busses voltage-GREATER THAN 420 VOLTS

o System frequency - GREATER THAN59.9 Hz

IF safeguards bus voltage degradesto less than 420 volts, THEN,return to Step l.IF system frequency degrades toless than 59.9 Hz THEN, return toStep 2.

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15 Establish Further Guidance:

o Return to - PROCEDURE IN EFFECTOR OPERATING PROCEDURES

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ATTACHMENT D G STOP

To stop any unloaded D/G and place in standby, perform the following:

1) Place emergency D/G SYNCHROSCOPE switch to either AC emergency bus.

2) Using emergency D/G GOVERNOR, adjust D/G speed until frequencysynchroscope is rotating slowly in the fast direction.

3) Using AUTO VOLTAGE CONTROL RHEOSTAT, set D/G voltage at approximatel480 volts.

4) Place emergency D/G SYNCHROSCOPE to OFF.

5) Place emergency D/G CONTROL switch to STOP and immediately depressvoltage shutdown button.

6) After 60 seconds, perform the following:

o, Depress emergency D/G FIELD RESETo Depress emergency D/G RESETo Verify AIR START SOLENOID lights — LITo Verify START RELAY (1 and 2) lights — LIT

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