ML17261A980
| ML17261A980 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 02/23/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17261A978 | List: |
| References | |
| AP-ELEC.2, NUDOCS 9003080329 | |
| Download: ML17261A980 (34) | |
Text
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AP-ELEC. 2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV 5
PAGE 1 of 16 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED*COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE eP
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$ 0 EFFECTIVE DATE OA~ ROE-QA CATEGORY 1.0 GINNASTATION START:
REVIEWED BY:
DATE TIME COMPLETED; DATE TIME' S doSOSOS29 9OOm7 PDR ADDCN, 05000244 F
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AP-ELEC. 2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 2 of 16 A.
PURPOSE - This procedure provides actions to be taken if safeguards bus (14, 16, 17, and 18) voltage decreases to less than 420 V, or if system frequency decreases to less than 59.9 Hz.
B.
ENTRY CONDITIONS/SYMPTOMS 2.
SYMPTOMS The symptoms of SAFEGUARDS BUSSES LOW VOLTAGE OR 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 system frequency is less than 59.9 Hz.
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AP-ELEC. 2
, TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM'OW FREQUENCY REV:
5 PAGE 3 of 16 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 reactor is critical.
1 Check Safeguards Bus Voltages:
o Safeguards busses 14; 16, 17, and 18 voltage - GREATER THAN 420 VOLTS IF any safeguards bus voltage less than 420 volts, THEN, start both emergency D/Gs and continue to monitor voltage.
IF any safeguards bus voltage decreases to less than 414 volts, THEN, go to Step 4.
2 Check with Power Control To Verify System Frequency GREATER THAN 59.9 Hz IF system frequency less than 59.9 Hz, THEN, start both emergency D/Gs and continue to monitor frequency.
IF system frequency decreases to less than 58.5 Hz, THEN, go to Step 4.
3 Establish Monitoring Of-SAFEGUARDS BUS VOLTAGE/SYSTEM FREQUENCYi AND GO TO STEP 14
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AP-ELEC.2
, TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 4 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4
Check Status of D/Gs:
- a. Unit/parallel operation selector
- IN UNIT POSITION
- b. Voltage control - IN AUTO
- c. Voltage - APPROXIMATELY 480 VOLTS
- d. Frequency
- APPROXIMATELY 60 HZ
- a. Place D/G unit/parallel operation selector in UNIT position.
- b. Place voltage control in AUTO.
- c. Adjust auto voltage control rheostat to obtain 480 volts.
- d. Ad5ust governor control to raise or lower D/G speed to obtain 60 HZ.
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AP-ELEC.2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 5 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 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 Of Safeguards Busses To The Emergency D/Gs And Restoration Of Required Equipment.
As Follows:
a.
Complete - THE TRANSPER OP THE "B" INSTRUMENT BUS TO ITS MAINTENANCE SUPPLY b.
Bus 14 transfer:
- 1) Open - BUS 14 NORMAL FEED 480V BREAKER
- 2) Verify - D/G "A" BUS 14 SUPPLY BREAKER CLOSES This Step continued on the next page.
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AP-ELEC. 2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 6 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED (Step 5 continued from previous page)
- 3) Check and restore equipment lost during bus transfer:
o Charging pumps restored as required o
PRZR htrs restored as necessary o
RHR pump restored as required o
MCCs restored as required o
CV fan coolers restored as required o
CCW pump restore'd as required o
Aux FV pump restored as required This Step continued on the. next page.
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AP-ELEC. 2
. TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW
'REQUENCY REV:
5 PAGE 7 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED (Step 5 conti'nued from previous page) c.
Bus 16 transfer:
- 1) Open - BUS 16 NORMAL FEED 480V BREAKER
- 2) Verify - D/G "B" Bus 16 SUPPLY BREAKER CLOSES
- 3) Check and restore equipment lost during bus transfer:
o Charging pumps restored as required o
PRZR backup htrs restored as required o
RHR pump restored as required o
MCCs restored as required o
CV fan coolers restored as required o
CCV pump restored as required o
Aux FV pump restored as required This Step continued on the next page.
l' 1
AP-ELEC.2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 8 of 16 STBP ACTION/BXPECTED RESPONSE RESPONSB NOT OBTAINED (Step 5 continued from previous page) d.
Bus 17 transfer:
- 1) Open - BUS 17 NORMAL FEED 480V BREAKER
- 2) Verify - D/G "B" BUS 17 SUPPLY BREAKER CLOSBS
- 3) Check and restore equipment lost during bus transfer:
o SW pumps restored as required o
MCCs restored as required o
Fire pump restored as required e.
Bus 18 transfer:
1)
Open - BUS 18 NORMAL FEED 480V BREAKER
- 2) Verify - D/G "A" BUS 18 SUPPLY BREAKER CLOSES
- 3) Check and restore equipment lost during bus transfer:
o SW pumps restored as required o
MCCs restored as required
- f. Complete - THE TRANSFER OF THE "B" INSTRUMENT BUS BACK TO ITS NORMAL SUPPLY
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AP-ELEC.2
. TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 9 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 Verify Status Of Equipment Required For Current Plant Conditions:
o Charging pumps - OPERATING AS REQUIRED o
SV pumps - OPERATING AS REQUIRED o
CCV pumps - OPERATING AS REQUIRED o
PRZR heaters
- OPERATING AS REQUIRED o
RHR pumps - OPERATING AS REQUIRED o
MCCs - ALL ENERGIZED o
CV fan coolers
- OPERATING AS REQUIRED o
Fire pump breaker - CLOSED AS REQUIRED o
Aux FV pumps - OPERATING AS REQUIRED
'IF required equipment NOT operating, THEN start equipment as necessary.
7 Check D/G Operation Periodically:
o D/G voltage - AT APPROXIMATELY 480V IF D/G voltage/frequency NOT as
- desired, THEN ad)ust D/G voltage/frequency as necessary.
o D/G frequency - AT APPROXIMATELY 60 HZ
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AP-ELEC. 2
. TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 10 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 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 reporting requirments.
9 Complete NOTIFICATION TO HIGHER SUPERVISION 10 Establish Conditions To Return Safeguards Busses To Normal Power Supplies:
o Check voltage/frequency o All safeguards busses voltage-GREATER THAN 420 VOLTS
'I o
System frequency
- GREATER THAN 59.9 Hz o
Cause of degraded condition-KNOWN AND CORRECTED Return to Step 7.
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AP-ELEC.2
, TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV S
PAGE 11 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED ll Remove the "A" D/G From Service And Restore Required Equipment As Follows:
a.
Complete - THE TRANSFER OF THE "B" INSTRUMENT BUS TO ITS MAINTENANCE SUPPLY b.
Bus 14 transfer:
C
- 1) Manually hold closed
- BUS 14 NORMAL FEED 480V BKR SWITCH
- 2) Open - "A" D/G BUS 14 SUPPLY BREAKER
- 3) Verify - BUS 14 NORMAL FEED 480V BKR CLOSES
- 4) Check and restore equipment lost during bus transfer:
o Charging pumps restored as required o
PRZR htrs restored as required o
RHR pumps restored as required o
MCCs restored as required o
CV fan coolers restored as required o
CCV pump restored as required o
Aux FV restored as required
- 3) IF normal feed bkr fails to
- close, THEN verify D/G supply bkr closes back in and investigate.
This Step continued on the next page.
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AP-ELEC. 2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW
" FREQUENCY REV' PAGE 12 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED (Step 11 continued from previous page) c.
Bus 18 transfer:
- 1) Manually hold closed
- BUS 18 NORMAL REED 480V BKR SWITCH
- 2) Open - "A" D/G BUS 18 SUPPLY BREAKER
- 3) Verify - BUS 18 NORMAL FEED 480V BKR CLOSES
- 4) Check and restore equipment lost during bus transfer:
o SW pumps restored as required o
MCCs restored as required
- d. Stop - THE "A" D/G AND ALIGN FOR AUTO STANDBY (Refer to ATTACHMENT D/G STOP) e.
Complete - THE TRANSFER OF THE "B" INSTRUMENT BUS BACK TO ITS NORMAL SUPPLY
- 3) IR normal feed bkr fails to
- close, THEN verify D/G supply bkr closes back in and investigate.
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AP-ELEC. 2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 13 of 16 STEP ACTION/EXPECTED RBSPONSE
RESPONSE
NOT OBTAINED 12 Remove The "B" D/G From Service And Restore Required Equipment As Follows:
a.
Bus 16 transfer:
- 1) Manually hold closed
- BUS 16 NORMAL PEED 480V BKR SVITCH
- 2) Open - "B" D/G BUS 16 SUPPLY BRBAKER
- 3) Verify - BUS 16 NORMAL FBED 480V BKR CLOSES
- 4) Check and restore equipment lost during bus transfer:
o Charging pumps restored as required o
PRZR htrs restored as required
/
o RHR pump restored as required o
MCCs restored as required o
CV fan coolers restored as required o
CCV pump restored as required o
Aux PV pump restored as required
- 3) IF normal feed bkr fails to
- close, THEN verify D/G bkr, closes back in and investigate.
This Step continued on the 'next page.
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AP-ELEC.2 LITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 14 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED (Step 12 continued from previous page) b.
Bus 17 transfer:
- 1) Manually hold closed - BUS 17 NORMAL FEED 480V BKR SVITCH
- 2) Open - "B" D/G BUS 17 SUPPLY BREAKER
- 3) Verify - BUS 17 NORMAL FEED 480V BKR CLOSES
- 4) Check and restore equipment lost during bus transfer:
o SV pumps restored as required o
MCCs restored as required
- c. Stop - THE "B" D/G AND ALIGN FOR AUTO STANDBY (Refer to ATTACHMENT D/G STOP)
- 3) IF normal feed bkr fails to
- close, THEN verify D/G bkr closes back in and investigate.
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AP-ELEC.2 TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 15 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 13 Verify Status Of Equipment Required For Current Plant Conditions:
o Charging pumps - OPERATING AS REQUIRED o
SW pumps - OPERATING AS REQUIRED o
CCV pumps - OPERATING AS REQUIRED o
PRZR heaters
- OPERATING AS REQUIRED o
RHR pumps - OPERATING AS REQUIRED o
MCCs - ALL ENERGIZED o
CV fan coolers
- OPERATING AS REQUIRED o
Fire pump breaker - CLOSED AS REQUIRED IF required equipment NOT operating, THEN start equipment as necessary.
14 Verify Safeguards Bus Voltage/System Frequency Normal:
o All safeguards busses voltage-GREATER THAN 420 VOLTS o
System frequency - GREATER THAN 59.9 Hz IF safeguards bus voltage degrades to less than 420 volts,
- THEN, return to Step l.
IF system frequency degrades to less than 59.9 Hz THEN, return to Step 2.
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AP-ELEC. 2
. TITLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW FREQUENCY REV:
5 PAGE 16 of 16 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 15 Establish Further Guidance:
o Return to - PROCEDURE IN EFFECT OR OPERATING PROCEDURES
-END-
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AP-ELEC. 2
. 'rrTLE:
SAFEGUARD BUSSES LOW VOLTAGE OR SYSTEM LOW
'REQUENCY REV 5
PAGE 1 of 1 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 frequency synchroscope is rotating slowly in the fast direction.
3)
Using AUTO VOLTAGE CONTROL RHEOSTAT, set D/G voltage at approximatel 480 volts.
4)
Place emergency D/G SYNCHROSCOPE to OFF.
5)
Place emergency D/G CONTROL switch to STOP and immediately depress voltage shutdown button.
6)
After 60 seconds, perform the following:
o, Depress emergency D/G FIELD RESET o
Depress emergency D/G RESET o
Verify AIR START SOLENOID lights LIT o
Verify START RELAY (1 and
- 2) lights LIT
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