ML20113G580
| ML20113G580 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/10/1989 |
| From: | Allison S GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-192-000F-90, CON-IIT5-192-F-90, RTR-NUREG-1410 LO-IU-11101-001, LO-IU-11101-1, NUDOCS 9202210484 | |
| Download: ML20113G580 (12) | |
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1 GEORGIA POWER POWER GENERATING DEPARTMENT V0GTLE ELECTRIC GENERATING PLANT INSTRUCTIONAL UNIT TITLE:
RESPOND TO FUEL OIL SYSTEM ALARMS NUMBER: '
LO-IU-11101-001-01-C PROGRAM:
LICENSED OPERATOR REVISION:
1
.u AUTHOR:
S. ALLISON DATE:
10/22/87 APPROVED -
DATE:
((/()/g V0GTLE PROCEDURE 17035-1 ANNUNCIATOR RESPONSE PROCEDURES (REV 4)
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g LO-IU-11101-001-01-C Rospond To Fu21 011 Systoa Alerms PERFORMANCE OBJECTIVE Given that a diesel generator Fuel Oil system alarm has annunciated, respond to the diesel generator Fuel Oil System alarm, All communication and activities must be performed in accordance with current, approved procedures.
The alarm must be acknowledged and its validity determined. A plant equipment operator must be dispatched to perf orm activities locally, as necessary. MW0s must be initiated as needed.
Plant Vogtle Technical Specifications must be referred to when alarms occur which could affect the operability of the diesel generator.
INFORMATION The following Diesel Generator Fuel Oil System alarms are covered in this instructional unit:
DGlA LOW PRESS FUEL OIL DGlA HI DIFF PRESS FUEL OIL FILTER DGlA HIGH LEVEL MAIN TANK DGlA LOW LEVEL MAIN TANK DGlA HIGH OR LOW LEVEL DAY TANK DG1A FUEL OIL INJECTION LINE BREAK Upon receipt of any of the diesel generator alares, obtain Plant Vogtle Annunciator Response Procedure 17035-1 and acknowledge the alarm.
When responding to the Diesel Generator Fuel Oil Alarms:
1.
Acknowledge the alarm.
When acknowledging the alarm, note any other alarm that t o have annunciated associated with this alarm.
2.
Investigate the almen.
Perform the initial operator actioos required for the appropriate alarm as listed in the procedure. Dispatch a PE0 to perform the local subsequent operator actions as listed in the procedure.
Determine the validity of the alarm.
In most cases, the PE0's readings of local indications will accomplish this.
3.
Take corrective action (s) to correct the condition causing the alarm.
After the condition has been corrected, reset the alarm. Ensure that the PE0 resets the alarm locally.
Initiate MW0s as needed. Note any change of alignment or switch positions that have been made to affect the operability of the diesel generator.
Refer to Technical Specifications for the diesel generators where applicable.
Notify your SRO of the situation.
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I LO-IV-11101-001-Ob Ci Respond To Fuel oil Systea Alarce
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4.
Log the activity. Log all pertinent information in the control rooe log.
Dol DG1A LOW PRESS FUEL OIL The LOW PRESS ITEL OIL alarm will annunciate ehen the fuel oil pressure decreases to 20 psi.
The probable cause for this alarm is the fuel oil filter being clogged. The low pressure f uel oli alarin could also be caused by the pump suction duplex strainer being cicgged, a pipe break in the Fuel 011 System.
or a malfunction of the engine-driven fuel oil pump.
Additional causes include a pressure regulating valve failed open or a low level in fuel oil day tank. The inadvertant closure of the isolation valve between the day tank and engine may also be a possible cause. This valve is normally locked in the open position. W;th the valve from the day tank closed or on a low day tank level, the engine will have shut down.
Acknowledge the slans.
A nnowledge the alarm, noting any other alarm annunciated that may be associated with this alara.
Investigate the alarm.
Direct an OA0 to verify the alarm by observing the low pressute at the engine control panel. The low pressure alarm eculd be caused when the DGIA HI DIFF PRESS FUEL OIL FILTER alarm i$ illuminated.
Direct the OA0 to check the duplex fuel strainer gauge and the fuel filter gauge.
Direct the OAO to trace the Fuel Oil Systen for any leaks.
Take corrective action.
If this alarm is due to DGIA HI PRESS FUEL DIL FILTER being antmnciated, direct the OAO to shift the filters.
Initiate an NWO on the old filter.
If the duplex fuel strainer reading is not normal on local PDI-19102 (19103), direct the OAO to shift the strainers.
Initiate an NWO on the old strainer.
If a major leak in the Fuel 011 System to detected, shut down the diesel generator and direct an OAO to isolate the leak if.,possible.
Direct Maintenance personnel to assist in the investigation.
If a leak is detected. Maintenance must correct the condition causing the leak.
Additional checks include directing the OAO to check day tank level, ensure open the isolation valve from day ta,k to engine, and to check for normal appearance of the coupling to the main fuel oil pump. Notify the SRO of the situation.
Refer to Technical Specifications as applicable and determine operability of the diesel generator.
Log the activity Log the, activity in the appropriate logbook.
Any alarm received in the control room must be docu:ndnted corim t13 I
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LO-IV-11101-001-01-C1 Respond To Fuel Oil Systeo Alarms id2 DCI A IIIG11 DIFF PRES" FcEL OIL FILTER 1his alarm occurs.t 20 paid across the inservice filter of the duplex filter unit. In addition ts the alarm. indications of the high differential pressure include a gauge on the engine control panel., dif ferential preIssure gauge at the gauges at the engine front, and low fuel oli pressure alarm and gauges. The cause of this alarm is most likely a fouled in-service filter.
Acknowledge the alarm.
This alarm tould occur if the engine was running and flow through the filter was decreesed enough due to fouling to have a differential pressure across thr filter of 20 paid.
Investigatt the alarm.
Dependent up-- 'nw badly the filter is fouled, the engine may begin to falter. mdr.iire or shut down.
Refer to Tech Spec 3.6.1 if the engine is inoperable, ut patch the OAO to verify a high differential pressure reading at the engine control panel and local gauge. If the engine is still running, the gauge readings will indicate differential pressure. Another possible cause is the inadvertant closure of a root valve to the differential. pressure switch.
Take corrective action 6.
Direct the OAO to swap filters using procedure 13145-1.
Log the activity.
Log the activity and initiate an KWo to have the old filter element replaced by Maintenance.
D03 DG1A FUEL OIL INJECTIOV LINE BREAK Each of the 16 high= pressure fuel injection lines from the fue( inj ec tion pump to its injector has en outside line, shrouding the high pressure line, pressures on the injectics line are normally approximately 3000 psi and above. A rupture on one of these high pressure lines could pr2sent a fire hazard with fuel oil possibly spraying onto a hot turbocttarger. Should a leak or rupture occur with the engine running, fuel oil leaking from the injection line is contained inside the shroud line and routed to the shrouded fuel oil line leakage tank.
.\\ level switch will cause the control room (and local) annunciator to alarm
,o a high tank level.
l Acknowledge the alarm When the alarm is received in the con'-
< - iom. thr-operator should note other associated alarms which may in b-p.,tinent information when
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investigating the cause of the alarm.
0-n ill alarms have been noted the l-3 1
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i LO-IU-11101-001-01-C Respond To Fuel 011 Systeo Alarms 4
alarm is acknowledged by depressing the ACK pushbutton which silences the j
annunciator horn and changes the annunciator window f r< is a flashing light to a continuous light.
Investigate the alarm.
Reduce e9gine load.
A luel oil injection line burstJng can cause an i
' imbalance with one cylinder providing less power than the others. possibly increasing vibration. Also, reducing engine load reduces the amount of fuel being pumped through the leak, i
Dispatch the OAO to check tank level and find the leak. The cap on the tank i
unscrews. The small leak-off line (near each injection pump) carries leaking fuel oil to the tank. The leaking line should be warm. A visual inspection of the head and injection pumps may locate the leak. Also, checking cylinder temperatures may help in locating the leak with the cooler cylinder being suspect.
Take' corrective action.
Reduce load and stop DG. If not runni.sg due to an emergency start.
Initiate maintenance as required.
Log the activity.
Los the activity and refer to Tech Specs if the leak was determined to be severe enough to render the DG inoperable.
D04 DotA trIGH LEVEL MAIN TANK This alarm any annunciate during filling cf the fuel oil storage tank, at 95% level (78.500 gallons).
Acknowledge the alarm-When the alarm is received in the control - room, the operator should note other associated alarna which may provide pertinent information when investigatins the c of the alarm. When all alarms have been noted, the alarm is acknowledens depressing the Acy. pushbutton which silences the annunciator horn and chnages the annunciator window from a flashing light to a continuous' light.
i Investigate the alsrs.'
Direct an OAO to the diesel fuel oil storage tank (FOST) building to verify the alarm by checkins local indications.
l Take corrective action.
If the diesel fuel oil storage tank s being filled direct the OAO to l
terminate the filling operation.
l-Los the activity l
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LO-IU-11101-001-01-C Respond To Puel Oil System Alarms Log the activity in the appropriate logbook.
Any alarm received in the control room must be documented correctly.
l DOS DGIA LOW LEVEL KAIN TANK This alarm could be caused by normal usage of the fuel oil or a leak in the storage tank.
The setpoint for this alarm is 76% (68.000 gallons). 1his alarm can be caused by normal fuel usag or possibly a fuel oil leak.
Acknowledge the alarm When the alarm is received in the control room. the operator should note other associated alarms which may provide pertinent information when investigating the cause of the alarm.
When all alarms have been noted, the alarm is acknowledged by depressing the ACK pushbutton which silences the unnunciator horn and changes the annunciator window from a flashing light to a continuous light.
Investigate the alarm.
Check the level indicated on the meter on QEAB. 68.000 gallons. the Tech Spec minimum, is approximately 76 percent on the instrument. Direct an OAO to verify the low level at the angine control panel and at the local tank level indicators.
Direct the OAO check the Fuel Oil Transfer System alignment and to observe for any leaks.
Take corrective action.
If the fuel oil tank is low. notify the SRO or Shif t Supervisor who will make arrangements to have fuel oil delivered.
If necessary, transfer fuel i
oil from another diesel generator fuel oil storage tark per Plant Vogtle Procedure 13146-1. " Diesel Generator Fuel Oil Transfer System." If a misalignment is determined, direct the OAO to reposition valves as nece ssa ry.
Report this immediately to the SRO and attempt to dete rmine when and why th2 misalignment was maJe.
If a fuel oil leak is determined, notify Maintenance to repair the leak.
Refer to Technical Specifications.
tog the activity.
Log the activity in the cantrol room log.
D07 DGIA IIIGH OR LOW DAY TANK LEVEL This alarm indicates that either a htch or low condition exists. This alars is expected.while recycling the day tank fuel back to the storage tank due to a high level.
This ala n ould also be caused by the failure of the transfer pumps to start or stop, rho transfer pump's discharge filter being clogged, a leak in the f" il svstem, misaligned valves, or an empty storage tank.
The setpoints ti this alarm are:
high. 1230 gallons; low. 680 gallons, i
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g LO-IU-11101-001-01-Ci Roepond To Tusi 011 Syste3 Alorus Acknowledge the alarm.
Thir. alarm does not norteally occur when the transfer pumps are operating correctly.
Invest igat e the *nlarm.
check that the transfer pump controls are in AUTH.
Check for high or low level on the main control board.
Direct the OAO to check local indications for high or low level and pump discharg* pressure gauges.
Direct the OAO to read the fuel oil day tank gauge by depressing the pushbutton on the engfue control panel.
The day tank level gauge (a " bubble" type gauge that sends an air signal to the gauge) on the engine control panel (with the push-to-read pushbutton) is local only and does not use the same transmitter that drives the control room level gavge.
The control r3om level gauge is driven by a level indicating transmitter. Compare the two readings to determine whether a high or low level exists.
Direct the Ox1 to check for proper alignment of the Fuel 011 System. This will include checking for leaks and checking the following: transfer pump discharge valves opeu, transfer pump discharge to DFOST is closed, and supply isolation valve to day tank is open.
Take corrective action.
If the high or low level condition is due to manual operation of the i
transfer pump, star
- or stop the pump as necessary to clear the alarm.
If the transfer pump discharge filter is clogged direct an OAO to shift the filter. You must initiate au NWO on the affected fi1*.er.
If a leak occurs in the Fuel Oil System piping, direct Maintenance to investigate and repair the leak.
Notify the SRO of the situation.
Refer to Technical Speci-fications as appilcable and determine the operability of the diesel generator.
Log the activity.
Log the activity in the control room log. Initiate Maintenance where required.
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LO-10-11:01-001-01-C: Respond To Fuel Oil System Alatms PERP0MAh*CE CUIDE l
Follow these steps to respond to a diesel generator Fu,1 Oil Systern alartn.
1 Acknowledge the diesel generator Fuel 011 System alatsi.
2.
Investigate the alarm.
3.
Take currective ection.
4.
Log the activity.
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g LO-IU-11101-001-01-C Respond To Fuel Oil System Alatus i
i SELF-TEST Before proceeding to the Task Practice, answer the following q"estions.
t 1.
The DG must be shut down to swap the fuel oil filter.
- a. True
- b. raise
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2.
The fuel oil day tank level indicating gauge in the control room, and I
the gauge locally at the engine control panel (with the push-to-read button), must always read the same, since they both use the same level transmitter, f
- a. True
- b. False.
3.
Alarm DGIA FUEL Olt INJECTION LINE BREAK. when annunciated, indicates that a break has occurred on a on tha diesel generator.
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LO-10-11101-001-01-C Respond To Fuel Oil System Alarms ANSWFRS 1.
False. Procedure 13145-1 instructs the OAO in switching t.o the st,andby f11ter of the duplex when the engim is running.,
2.
False. The local push-to-read button is a separate type sending an air signal to the gauge on the engine control panel. The control roorn grege is driven by a level indicating transmitter.
t 3.
fuel oil injection header 9
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t 1.0-IU-11101 -001 C : Respond To Fuel Oil Systers Alarms j'-
TASK PRACTICE 1
Before proceeding to the Performance Test. complete the following Task Practice exercise (s).
t 1.
Review Procedure 17035-1.
Be sure that you understand al.1 precautions, limitations, and steps associated with responding to DG F
uel 011 System alarms.
i 2.
Take this instructional unit and Procedure 17035-1 to the control room or simulator.
Be sure that you can locate all instrumentation associated with responding to DG Fuel 011 System alarms.
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3.
In the control room or simulator. simulate responding to DG Fuel 011 System alarms.
If possible, have a fellow trainee evaluate your performance using Procedure 17035-1 and this instructional unit.
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3 1.0-I U-11101-001 C : Respond to Fuel Oil System Alarms 9
FEEDBACK ON TASK PRACTICE s
1.
If you have aQ questions about the precautions. limitations, or, steps i
in Proce dure 17035-1. ask your instructor.
2.
You should have been able to locate all instrumentation associated with responding to DG Fuel Oil System alarms.
If you had any difficulty, ask your instructor for help.
3.
.You should have simulated the steps necessary to respond to diesel generator Fuel Oil System alarms.
If you had any difficulty. re-read the pertinent sections of this instructional unit and the procedure.
Resolve any questions with your instructor.
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