ML20113G575
| ML20113G575 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/10/1989 |
| From: | Allison S GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-192-000E-90, CON-IIT5-192-E-90, RTR-NUREG-1410 LO-IU-11104-001, LO-IU-11104-1, NUDOCS 9202210482 | |
| Download: ML20113G575 (16) | |
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GEORGIA POWER
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POWER GENERATING DEPARTMENT
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V0GTLE ELECTRIC GENERATING PLANT INSTRUCTIONAL UNIT TITLE:
RESPOND TO LUBE OIL SYSTEM ALARMS NLMBER:
LC-IU-11104-001-01-C PROGRAM:
LICENSED OPERATOR REVISION:
1 AUTHOR:
S. ALLISON DATE:
10/21/87 n
Mb F//0 /ff APPROVEDr DATE:
V0 GILE PROCEDURE 17035-1, ANNUNCIATOR RESPONSE PROCEDURES (REV 4)
V AS ER ODPY 9202210482 920116 PDR ADOCK 05000424 g
PDR 1
LO-IU-11104-001-01-C; Respond to Lube Oil System Alarms PERFORMANCE OBJECTIVE Given that a diesel generator Lube Oil System alarm has annunciated.
respond to the diesel generator Lube Oil System alarms.
All communication and activities must be performed in accordance with current. approved procedures.
The alarm must be acknowledged, the condition causing the alarm must be investigated, and actions must be taken to correct the condition causing the alarm if applicable.
A plant equipment operator must be dispatched to perform activities locally.
as necessary. MW0s must be initiated as needed.
INFORMATION The following diesel generator Lube 011 System alarms are covered in this instructional unit:
DG1A LOW TEMP LUBE OIL-IN DG1A LOW TEMP LUBE OIL-0UT DG1A HI TEMP LUBE OIL-IN DG1A HI TEMP LUBE OIL-0UT DG1A TRIP HICH TEMP LUBE OIL UGIA LOW LEVEL LUBE OIL DGIA LOW PRESS LUBE OIL DG1A TRIP LOW FRESS LUBE OIL DG1A LOW PRESS TURBO OIL-RIGHT DGIA LOW PRESS TURBO OIL-LEFT DGIA TRIP LOW PRESS TURBO OIL.
DGIA HI DIFF PRESS LUBE OIL FILTER DG1A LOW OIL PRESS SENSOR MALFUNCTION.
NSCW (nuclear service cooling water) flow removes heat from the jacket water.
The lube oil heat exchanger has jacket water passing through tubes in the heat exchanger, with lube oil on the shell side. When the diesel engine is running, excessive heat in the lube oil will be removed by jacket i
water. Jacket water heat is removed by NSCW.
Temperature control valve TCV-190SG (19097) modulates to pass a certain amount of jacket water flow, and allows some bypassing of the jacket water heat exchanger to maintain the correct temperatures.
Upon receipt of any one of the diesel generator alarms, obtain Plant Vogtle Annunciator Response Procedure 17035-1.
and acknowledge the alarm.
Also depress the SILENCE push button to silence the alarm horn.
When responding to any one of the di.-r:
.w rat or alarms:
1.
Acknowledge the alarm. When ackma.i. % ng the alarm. note any other alarm that may have annunciated e -
iited with this alarm.
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o LO-IU-11104-001-01-C; Respond to Lube Oil System Alarms 2.
Investigate the alarm.
Perform the initial operator actions required for the appropriate alarm as listed in the procedure. Dispatch a pEO 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 accomp1.ish this.
3.
Take corrective action (s) to correct the condition causing the alarm, Af ter the condition has been corrected, reset the alarm.
Ensure that the PE0 resets the alarm local).
Initiate HW0s 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 appilcable.
Notify your SRO of the situation.
4.
Log the activity.
Log all pertinent information in the control room log.
A01 DG1A LOW TEMP LUBE OIL-IN This alarm occurs when the lube oil-in temperature reaches a setpoint of 140 degrees F.
When the DG is not running, the lube oil is kept warm (with
- the keep-warm pump running) by the lube oil heater mounted in the lube oil sump.
This alarm could be caused by a malfunction of the lube oil heater or tripping of the keep-warm pump. The alarm may also occur when the diesel generator is running under a heavy load and a rapid load reduction occurs with overcooling of the lube by the Jacket Water System due to a slow response of the jacket water thermostatic bypass valve.
In this case, the alarm would be expected.
Acknowledge the alarm When the alarm is received in the control room, the operator should note other associated alarms which may provide pertinent infu.6 tion 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 annunciator horn and changes the annunciator window from a flashing light to a continuous light.
Investigate the alarm.
Direct an OAO to:
Check the keep-warm pump operation, and check the pump breaker on a.
MCC INBI (1NBO) to see if it has tripped, b.
Check the lube oil heater breaker on MCC INBI (1NBO).
Check the lube oil-in temperature and jacket water-in temperature c.
at the engine control canel.
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4 LO-IU-11104-001-01-c; Respond to L he Oil System Alarms Take corrective action.
If the tube oil heater or the keep-warm pump has tripped, direct the OAO to reset the breaker (s).
If the lube oil pump tripped and would not stay on.
immediately dispatch Maintenance personnel to investigate the problem. At the same time, declare the DG inoperable, direct the OAO to place the engine controls in MAINTENANCE and refer to Tech Spe.c 3.8.1.1 or 3.8.1.2.
NOTE: Loss of the keep-warm pump means insa of pre-lubrication to the main lube oil bearings.
Sufficient pre-lubrication to the bearings cannot be sssured after the pump has been off for a period of time and bearing damage could occur if the DG started.
If the lube oil temperature continues to decrease and cannot be restored primarily due to the loss of the lube oil heater at 120 degrees F. start the diesel generator and let it run per Plant Vogtle Procedure 13145-1 to restc;e the lube oil temperature.
Log the activity.
Information such as equipment malfunctions and repairs must be logged in the control room log.
If an NWO was initiated log the MWO number and the repnirs made.
A02 DGIA LOW TEMP LUBE OIL-0UT Response to this alarm is similar to that for the previous alarm.
Refer to Plant Vogtle Annunciator Response Precedure 17035-1.
A03 DGIA HI TEMP LUBE OIL-IN (175 degrees F)
A04 DGIA HI TEMP LUBE OIL-0UT (190 degrees F) l The HI TEMP LUBE OIL-IN alarm occurs when the lube oil-in temperature to the diesel engine reaches 175 degrees F.
The HI TEMP LUBE OIL-0UT alarms occurs when the lube oil temperature coming out of the diesel. engine l
reaches 190 degrees F.
The probable cause for both alarms is inadequate L
coolant' flow through the lube oil heat exchanger, inadequate NSCW flow or a j
malfunction of the jacket water thermostatic bypass valve.
Both alarms j
L could also be caused by an engina overload.
Acknowledge the alarm.
l Note any other alarms annunciated that may be associated with either of l
these alarms.
Investigate the alarm.
l Check for associated alarms, such as -
DG1A HI TEMP JACKET WATER-IN 1-3
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.4 LO-IU-11104-001-01-C; Respond to Lube Oil System Alarms DGIA 111 TEMP LUBE OIL-0UT DGIA LOW PRESS TURBO OIL-RIGHT DGI A LOW PRESS TURBO OIL-LEFT DGIA LOW PRESS LUBE OIL Dispatch an OAO to check the turbo oil pressure and.the NSCW flow to the lube oil heat exchangers at the engine control panel. Also, have the OAO monitor the lube oil-in and lube oil-out temperature and the jacket water-in temperature using the Doric Trendicator on the engine control panel.
Take corrective action.
If the NSCW flow is low, perform corrective action to restore NSCW flow.
The normal range for the lube oil-in and out and the jacket water-in and out is approximately 145 to If5 degrees F.
If the NSCW temperature in and out to the jacket water heat exchanger shows little or no difference, yet the jacket water and lube oil temperatures are higher than normal, this indicates the the jacket water thermostatic bypass valve is not operating correctly and is bypassing the jacket water flow through the heat exchanger.
In this case, the LO will probably acknowledge both jacket water high temperature and lube oil high temperature.
If this occurs, shut down the diesel generator per Plant Vogtle Procedure 13145-1.
If the diesel generator is running under a heavy load, attempt to decrease load with the OAO monitoring. temperatures, especially the lube oil-out temperature.
If operational conditions allow and Tech Spec requirements will be met, shut down the diesel generator prior to the lube oil-out temperature reaching 200 degrees F. If it was started normally, the diesel generator will trip if this temperature is reached.
Log the activity Log the activity in the appropriate logbook.
Any alarm received in the control room must be documented correctly.
A05 DGIA TRIP HIGH TEMP LUBE OIL This alarm occurs at a lube oil temperature of 200 degrees F.
If the diesel generator is started with a normal start (not emergency started), it will trip and shut down when the alarm occurs.
Approximately 90 seconds after the trip occurs a timer causes interlocks to occur so that the diesel generator may be restarted (as long as the lube oil temperature detector senses less than 200 degrees F).
L'nder an emergency start, the alarm will still occur at 200 degrees F, but the diesel generator will not trip.
-Also, the diesel generator can be em.rgency started with the alarm present.
The probable causer of this alarm ar"
.mcine overload, inadequate jacket water flow through the lube oil heat inadequate NSCW flow Lmu or through the jacket water heat exchancer 1-4
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LO-IU-11104-001-01-C; Respond to Lube Oil System Alarms Acknowledge the alarm.
The to will have acknowledged the DGIA HI TEMP LUBE OIL-0UT first. By this time, investigative and corrective action for the alarm should have been initiated.
i Investigate the alarm.
If the diesel generator has tripped, investigate the cause of the trip prior to attempting to restart the diesel generator.
Direct the OAO to:
a, check the NSCW temperature in and out at the jacket water heat exchanger.
b.
check jacket water into the engine and out of the engine, check lube oil into the engine and lube oil out of the engine.
c.
Take corrective action.
If the diesel generator is running under emergency start conditions and this alarm occurs, direct a OAO to closely monitor the lube oil-out temperature using the Doric Trendicator.
If the temperature continues to rise above 200 degrees F and if plant conditions permit, shutdown the
' diesel generator.
NOTE: If the diesel generator is running under an emergency start and loaded and this situation occurs, it is quite possible that the unit is in a black-out or safety injection situation. Tn this case if it is necessary to unload and shut down the affected diesel generator, ensure that the other diesel generator train and safety-related equipment are in operation. Refer to Technical Specifications 3,8;1.1 and 3.8.1.2.
Nei.8fy the SRO of the situation.
Log the activity Log the activity in the appropriate logbook.
Any alarm received in the control room must be documented correctly.
A06 DG1A LOW LLVEL LUBE OIL The diesel generator should run about-7 days without adding oil.
Sc;ce oil is used during the normal running of the diesel generator and must be replaced. Many other alarm responses require the lube oil level to be checked and, if necessary, lube oil added.
The probable cause for this alarm is normal usage of. lube oil or a leak in the Lube Oil System.
Acknowledge the alarm.
Acknowledge the alarm noting any other ilarms that may be illuminated.
Investigate the alarm.
Direct a OAO to check the Lube oil Sy r-m ve"ssores on the engine control panel.
Direct the OAO to check the l o b.
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-ump level using the dipstick.
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LLO-IU-11104-001-01-C; Respond to tubeL0il System Alarms Direct the OAO to walk down-_the-Lube Oil System at the diesel skid for obvious leaks.
The alarm will be verified by the dipstick reading.
Take corrective action.
Inform the Shif t Supervisor of_ a low oil situation. The Shift Supervisor will order the lube ' oil from the warehousei Initiate an HWO for-Maintenance-to deliver the-lube oil.
Ensure the correct type of oil is 1
obtainad'and added at the correct location foil sump). A newly delivered lube oil-drum:must be sealed, llave the OAO read the specifications of the tube oil on-the drum label.
Verify with the SRO that the specifications match the type of oil the SRO ordered, The OAO adds lube oil through the
-dipstickLconnection on top of-the sump using a hand-driven or electric pump.'When the OA0 has reported the addition it. complete, reset the alarm.
If a leak is found in the -. Lube 011 System, it must be corrected by Maintenance.
The _ severity of the leak' could affect the operability of the diesel generctor.
Log the activity.
-Log the. activity and include the amount of oil added, if an addition was
> necessary.
801 DG1A LOW PRESS LUBE OIL This alarm occurs at a setpoint of less than or equal to 40 psi oil pressure.
This alarm will only occur-if the diesel generator is running.
The~possible causes for this-alarm are -
a.
lube oil filter clogged b.
lube oil strainer clogged c.
' lube oil pressure' regulator failed open
.d.
engine-driven lube oil pump malfunction
-e.
low lube oil sump-level.
~f.
lube oil sump tank internal: strainer clogged
-g.
high. lube oil temperatures
= Acknowledge the alare.
Acknowledge the alara and note any other alarms that may be the cause of this alarm.
Investigate the-alarm.
Direct a OAO to perform the following on panel PDG2:
a..
Verify the the-low oil pressure at 1-PI-19176 (19177),
b.
Check the lube oil-out temperature to ensure that it is between 160-and.180 degrees F.
c.
.ing the dipstick.
d.
Check for an associated alarm n DG1A PRESS LUBE OIL FILTER.
-e.
Check lube oil strainer ditfriential pressure on the engine control' panel; 1-6 - -
LO-IU-11104-001-01-C; Respond to Lube Oil System Alarms Take corrective action.
If the lube oil sump level is very low and this appears to be the only problem with the Lube Oil System, instruct the OAO to add oil to the lube oil sump.
If lube oil cannot be added immediately, shut down the diesel generator (if plant conditions allow).
If the DGIA HI DIFF PRLFS LUBE OIL FILTER alarm is also annunciated.
direct the OAO to shift the filters.
Initiate an MWO on the old filter. If the lube oil strainer dif ferential pressure is not normal, direct the OAO to shift the strainers.
Initiate an MWO on the old strainer.
Log the activity Log the activity in the appropriate logbook.
Any alarm received in the 1
control room must be documented correctly.
4 B02 DGIA TRIP LOW PRESS LUBE OIL This alarm occurs when two out of three pressure detectors at the lube oil main header detect less than or equal to 30 psi lube oil pressure.
When this alarm occurs, the diesel generator will automatically shut down regardless of how it was started (normal or emergency).
The diesel generator cannot be restarted until a timer has timed out after the trip (approximately 2 minutes) and the emergency stop has been reset, If this trip occurs, the DG is unable to power its safeguard train (a Tech Spec LCO must be entered). The probable causes for this alarm are the same as the low lube oil pressure (B01).
Acknowledge the alarm.
The-low pressure alarm should have already been acknowledged, the investigation initiated, and corrective action taken.
Investigate the alarm.
Verify that the diesel generator has tripped.
Continue the investigation of the low lube oil pressure alarm. Direct the OAO to ensure LO-0UT temperatures are 160 to 180 degrees F and to check lube oil level. Strainer and filter differential pressure are normally monitored with the engine running; past trends could indicate a failure.
Take corrective action.
If the other diesel generator train and safety related equipment are operable, it will be necessary to declare the affected diesel generator inoperable.
Inform the SRO of the situation, and follow directives.
If the DGIA LOW OIL PRESS SENSOR MALFUNCTION alarm is also lit, the SRO may l
direct a restart attempt with the OAO closely monitoring oil pressure locally.
Refer to Technical Specifications.
Log the activity l
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_ _. _ -. _ - ~... -.
_. ~ - >.. _. _ _ _.
o LO-IU-11104-001-01-Cf Respond to Lubs 011 Systes Alarms Los the activity in the appropriate logbook._LAny alarm-received in the 1
control room must be documented correctly.
B03 DCIA LOW PRESS TURBO OIL-RIGHT r
B04 DGIA_ LOW PRESS TURBO OIL-LEFT
-These alarms occur at less than or equal-to 20 psi' oil supply pressure to
.the turbocharger bearings for both turbocaargers. The probable causes for these alarms are the same as for 801 and Boi Turbocharger oil pressure, due to the elevation of the-turbocharger, varies more than main oil pressure as the engine heats up on loading.
Acknowledge the alars.
u
.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 fannunciator horn and changes the annunciator window from a flashing light to a continuous light.
Investigate the alarm.
Direct an OAO (on. panel 'DG2) to:
p Verify the alarmed condition at the diesel generator, a.
b.
Check the-lube oil pressure at 1-PI-19170 on the engine control panel (red pointer for the right bank and black' pointer for the left' bank).
-c.
Ensure lube oil temperature is between 160 and 180_ degrees ~F.
d.
Check 1the -lube oil smap level using the _ dipstick.
-e.
Check for.DGIA HI DIFF PRESS LUBE OIL FILTER alarm, f.-
Check the lube oil strainer differential pressure at the engine control panel.
'g._
Ensure prelube valve is. closed.
Take corrective action.
- If the oil level is very low -instruct Maintenance to add oil.
Shut down the diesel, generator if plant conditions allow and if oil cannot be added-immediately.
If the HI DIFF ' PRESS LUBE OIL FILTER -alara is activated, direct the OAO~to shift the filters.
Initiate an_ NWO on the old filter.
If the. lube oil strainer differential-pressure is not normal, direct the 0A01to-shift the strainers.
Initiate an NWO on the old strainer.
~ Log the-activity Log the activity in the appropriate logbook.
Any alarm received in the control room must be documented correct b -
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LO-IU-11104-001-01-Ci Respond to Lube Oil System Alat^3 BOS DGIA TRIP LOW PRESS TURBO OIL This alarta occurs when the turbocharge oil pressure on the supply neader drops to 15 psi.
This will cause the diesel generitor to shut down if it had been operating from a normal start.
If it had been operating under an emergency start, the alarm would annunciate but the diesel would not shut down automatically.
The probable causes for this alarm are:
a.
lube oil filter clogged b.
lube oil strainer clogged lube oil pressure regulator failed open c.
d.
engine-driven lube oil pump malfunction e.
f.
turbocharger pre-lube valve open Acknowledge the alarm.
Alarms B03 and B04 should have been received and acknowledged prior tc receiving this alarm.
Investigative and corrective actions should already be initiated for these alarms.
Investigate the alarm.
Verify that the diesel generator has shut down if started normally.
If under an emergency start. verify that the diesel did not shut down automatically.
Direct the OAO to continue the investigation on alarms 803 and B04 to determine the cause of the alarms.
Take corrective action.
If the diesel generator did not shut down (had been emergency started) and if operating conditions permit, unload and shut down the diesel generator.
Refer to Technical Specifications.
If operating conditions will not allow the diesel generator to trip, direct the OAO to closely monitor the local turbo oil pressure gauges and to inform the control room as to whether the condition is remaining the'same, improving, or worsening.
Notify the SRO of the situation.
Log the activity Log the activity in the appropriate logbook.
Any alarm received in the control room must be documented correctly.
l-B06 DGlA HIGH DIFF PRESS LUBE OIL FILTER This alarm occurs when a setpoint of :' psi across the lube oil filter is detected. The probable cause for t his ilarm is a clogged in-service filter.
Acknowledge the alarm.
l Acknowledge the alarm, noting any ass.
io-t alarms which this condition l
may cause to occur.
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e.
e LO-1U-11104-001-01-C Respond to Lube Oil System Alarms Investigate the-alarm.
Direct the OAO to verify high pressure on the DIFF PRESS LUBE 01L FILTER gauge on the engine control panel. With an actual clogged filter, the cauge will be reading greater than or equal to 20 psi.
Take corrective action.
Direct the OAO to shift the filter to the standby filter. Initiate an MWO on the old filter.
When the OAO has shifted the filters, reset the alarm.
Log the activity Log the activity in the appropriate logbook.
Any alana received in the control room must be documented correctly.
B07 DGIA LOW OIL PRESS SENSOR HALFUNCTION This alarm indicates a malfunction such as air or oil leak in one or more of the three low pressure lube oil sensors on the main header.
If two or more' pressure sensors malfunction, the diesel generator should trip.
Acknowledge the alarm.
Acknowledge the alarm and note any other low lube oil pressure alarms that may exist.
Investigate the alarm.
Direct an OAO to check the lube oil pressure at the engine control panel.
Take corrective action.
If the engine-is running and the gauge is indicating less than 30 psi, shut down the diesel generator.
Refer to the Technical Specifications that apply to the diesel generators.
Notify the SRO of the situation.
Initiate an NWO.to have the sensor repaired.
Log the activity Log the activity in the appropriate logbook. Any alarm received in the-control room must be documented correctly.
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LO-IU-11104-001-01-C; Respond to Lube Oil Systen Alarms a.
i-PERFORMANCE GUIDE Follow these ' steps to respond to diesel generator tube Oil System alarms.
1.
Acknowledge the diesel generator Lube Oil System alarm.
2.
Investigate the alarm.
3.
Take corrective action.
4.
Log the activity.
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i LO-IU-11104-001-01-Ci Respond to Lube Oil System Alarms SELF-TEST Before proceeding to the Task Practice, answer the following questions.
1.
When the diesel generator is not running, the lube oil la kept warm by 2.
The DGIA LOW PRESS LUBE OIL alarm will annunciate whether the diesel generator is running or not,
- a. True
- b. False 3.
List the setpoints for the following alarms:
- a. DGIA LOW TEMP LUBE OIL-IN
- b. DGIA HI TEMP LUBE OIL-IN
- c. DGIA III TEMP LUBE OIL-0UT
For the following Lube 011 System trips, state the setpoint, coincidence, and if it will trip the diesel generator after it is emergency started.
- a. DGIA TRIP LOW PRESS TURBO OIL
- c. DGIA TRIP NIGH TEMP LUBE OIL s
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4 LO-IU-11104-001-01-C; Respond to Lube Oil System Alarms ANSWERS 1.
the lube oil heater and the keep-warm pump 2.
False. This alarm will occur only if the diesel generator is running.
3.
- a. less than or equal to 140 degrees F
- b. greater than or equal to 175 degrees F
- c. greater than or equal to 190 degrees F
- d. less than or equal to 40 psig 4.
a.
15 psig, either turbocharger, no
- b. 30 psig, 2/3 sensors, yes
- c. 200 degrees F. one sensor, no 1-13
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LO-1U-11104-001-01-Ci Respond to Lube Oil System Alarms TASK PRACTICE Before proceeding to'the Performance Test, complete the following Task Practice exercise (s).
1.
Review Procedure 17035-1.
Be sure that you undert.tand all precautions limitations, and steps associated with responding to tube oil System alarms.
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 tube Oil System alarms.
3.
In the control room or simulator, simulate responding to Lube 011 System alarms.
If possible, have a fellow trainee evaluate your performance using Procedure 17035-1 and this instructional unit.
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. LO-IU-ll104-001-01-Ci Respond to Lube Oil System Alarms 3
i.
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FEEDBACK ON TASK PRACTICE 1.
If you have any questions about the precautions. limitations, or, steps
.in Procedure 17035-1 -ask your instructor.
2.
You should have been able to locate all instrumentation associated a
with responding to tube Oil System alarms.
If you had any difficulty.
ask your instructor for help.
f 3.
You should have simulated the steps necessary to respond to tube 011 l
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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