ML20113G571
| ML20113G571 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/10/1989 |
| From: | Allison S GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-192-000D-90, CON-IIT5-192-D-90, RTR-NUREG-1410 LO-IU-11202-008, LO-IU-11202-8, NUDOCS 9202210480 | |
| Download: ML20113G571 (19) | |
Text
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CEORGIA POWER POWER GENERATING DEPARTMENT V0GTLE ELECTRIC GENERATING PLANT INSTRUCTIONAL UNIT b
TITLE:
RESPOND TO EMERGENCY DIESEL NUMBER:
LO-1U-11202-00R-01-C CENERATOR HISCELLANE005 ALARMS PROGRAM:
LICENSED OPERATOR REVISION:
1 AUTt10R:
S. ALLISON DATE:
7/31/89 h
APPROVED:
DATE:
g//d/((
V0GTLE PROCEDURE 17035-1. ANNUNCIATOR RESPONSE PROCEDURES (REV 4) w3.m
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e LO-1U-11202-008-01-C Respond To Diesel Generator Hiscellaneous Alarws PERFORMANCE OBJFCTIVE Given that a didsel generator miscellaneous alarm has annunciated respond,
to the diesel generator miscellaneous 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 perform activities locally, as necessary.
INFORMATION In this instructional unit. the following diesel generator miscellaneous alarms are covered:
DG1A TRIP HIG TEMP ENGINE BRG DGIA TRIP HI CRANKCASE PRESS DGIA VIBRATION TRIP DG1A TRIP OVERSPEED DGIA LOW PRESS CONTROL AIR DG1A HIGH PRESS STARTING AIR DGIA PAILURE TO START DG1A SWITCH NOT IN AtrTO DGIA BARRING DEVICE ENGAGED DG1A PANEL INTRUSION DGIA HI TEMP PANEL DGIA EMERGENCY START DG1A LOCAL ANN PNL PWR PAILURE DG1A ENGINE CNTL PWR A PAILURE DGIA ENGINE CNTL PWR 8 PAILURE Upon receipt of any ous the diesel generator alares. obtain Plant Vostle Annunciator Respasset dure 17035-1, and acknowledge the alora. Also depress the'512.INCE push > button to silence the alara horn.
s,6 When responding to anyeone of the diesel generator alarust ey 1.
Acknowledge the alarm. When acknowledging the alarm, note any other alarm that may have annunciateri associated with this alarm.
2.
Investigate the alarm.
Perform th.-
initial operator actions required for the appropriate alarm as li-i",1 in the procedure. Dispatch a PE0 to perform the local subsequent i4 i i or actions as listed in the t
procedure.
Determine the vali-
i" alarm.
In most cases, the PE0's readings of local indicati o omplish this.
t' 8-1
~..
_.. ~
LO-10-11202-008-01-C Respond To Diesel Generator Miscellaneous Alaras i
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 NW0s 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.
4.
Log the activity.
Log all pertinent information in t ie control room log.
A07 DGIA TRIP HIGH TEMP ENGINE BRG Acknowledge the alarm When the alare 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 annunciator horn and changes the annunciator window from a flashing light to a continuous light.
Investigate the alarm.
This alarm occurs at 228 degrees F.
If the diesel generator has been started from a normal start. it will trip.
This alarm could be caused by high temperature of the lubrication oil.
loss of lube oil pressure.
the failure of a main engine bearing. or an engine overload. The 10 main bearing temperature detectors have fusible metal rods which welt at 228 degrees P and trigger a pneumatic shutdown signal for the DG, The DG will trip unless emergency started.
Direct a OAO to check the lube oil-out temperature using the Doric Trendicator.
Determine if the OAO was present when the shutdown occurred andifanyabnormalanggggweredetected.
Direct the OAO to check the Lube 011 System ftis*W. Z oil level in the lube oil same schob4eM. tion. including checking the for any other associated alarms.
.p u
.n g N If the dieseIfeseherator'Is still running (i.e.. had been ehergency started). direct the 040-to check the temperature and report findings.
The diesel generator may be required to be shut down. if it had been emergency started.-dependent upon the OAO investigation. Caution the OAO that a i
crankcase explosion could occur and not walk or stand beside the diesel l
engine.
Take corrective ection.
Refer to Tech Specs and unload and shm '- wu t he DG. If there are no obvious problems with the Lube 011 System.
m>'
o" m MWO for Maintenance to investigate a possible failure of a mi n iar hearing.
It is important 2
4 LO-IU-11202-008-01-C Respond To Diesel Generator Miscellaneous Alarms to assemble all possible data which may help Maintenance to troubleshoot the specific cause of the alarm. such as lube oil-out temperature. load, malfunctions of lube oil system. or unusual noises heard by the OAO when the diesel generator was running.
Log the attivitv.
Log the activity in the centrol room log.
A08 DG1A Trip HI CRANKCASE PRESS 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 annunciator horn and changes the annunciator window from a flashing light to a continuous light.
Investigate the alarm.
This alarm occurs at 3 psi crankcase pressure.
This alarm could be caused by a crankcase vapor explosion ignited by an engine internal hot spot, excessive wear of the piston and cylinder liners that allows combustible gases to pressurize the crankcase.
the crankcase fans not operating (unlikely) or a plus in the crankcase vent line to the atmosphere. The diesel generator will have tripped if it had been started under a normal start.
a.
If the crankcase fans are not operating, the only expected effect is an increase to a positive pressure of 1/2 to 1 inch water column which should not cause the alarm and trip. Therefore, other problems will.2 present if the fans were not operating and the alarm and trip still occurred. The only expected result of the fans not running is visible oil leakage from the_ engine side covers and other crankcase penetrations c
. increased oil usage, b.
Pressure-reli de doors are provided on the crankcase: should crankcase ' press "rfse to 1 1/2 psig. the_ doors relieve. A flame.arrasting meetion is designed to snuff out flame when the door opens. This can result in smoke entering the diesel room.
The normal ' crankcase vent line is piped outside the diesel generator c.
- building, d.
The most likely causes of a sudden increase in crankcase cressuru are explosions of vapors inside the crankcase or a sudden break or failure of a piston or cylinder liner allowing combustion chamber pressure to pressurize the crankcase, e.
The electrical supply to the er;mkr we fans is de-enesgized under some conditions, such as after-a safe
rniertion (LOCA) with loss of normal ~ power to the 4160V cla%s
'an. This is because 480V 8-3
LO-IU-ll202-008-01-Ct Respond To Diesel Generator Miscellaneous Alarcs switchgear INB01 is shed in this instance and a small rise of crankcase pressure would be expected (see "a" above).
Refer to the annuncirtor response procedure for specific actions.
Direct the OAO to verify the crankcase pressure using the manometer (1-PI-19184) at the engine control panel (if the engine is still t;unning).
Direct the OAO to check the crankcase fan breakers on IRYI (1-03 and 04) to ensure thev are ON.
Warn the OAO that the diesel generator room may be filled with explosive cases if the crankcase pressure is high.
Take corrective actfon.,,
Direct the OAO to reset the fan breaker if it has tripped.
If the diesel generator is still running. refer to Tech Specs ensure that Maintenance does not remove engine cover until *'w rist of another explosion has diminished. Allow at least 15 minutt-load and shutdown the diesel per Plant Vogtle Procedure 13145-1.
Init an HWO for Maintenance to investigate for possible crankcase explssion.
Notif.v the SRO of the situation.
Lop the activity.
Log the activity in the control room log.
A09 DGIA VIBRATION TRIP Acknowledae 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 alaras he.e 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 Itght.
Investigate the alarm.
This alarm will occur if, excessive vibration is detected at the diesel engine or turbocharger.
Excessive vibration indicates potential mechanical problems on the moving parts of the diesel engine. A vibration detector is provided for each turbochargert two are provided for the engine.
Upon receipt of this alarm, the diesel engine will automatically shut down when operating f rom a normal start, Excessive vibration when operating from an emergency start will only annunciate the alarm.
If the diesel generator is running (emergency start situation). direct the OAO to check the engine for unusual noises or vibrations.
Take corrective action.
8-4
- -. - - - -. - ~ - - - -
L0-1U-11202-008-01-C1 Respond To Diesel Generator Miscellaneous Alarms 1
If the engine is still running, reduce load and shut down the diesel Fenerator per 13145-1.
Refer to Technical Specifications (the opposite train must be operable) for instructions for this condition.
Nottfr the SRO of the situation.
Initiate Maintenance to investigate the cause of the alette and t rip.
Log the activitv.
Log the activity in the control room log.
A10 DG1A TRIP OVERSPEED 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 annunciator horn and changes the annunciator window from a flashing light to a continuous light.
Also note the DG1A DISABLED. NON-RESET OF EMERGENCY TRIP annuncistor alare.
Investigate the alarm.
This alarm occurs when the diesel engine speed reaches 517.5 rpes.
This should not occur unless there has been a malfunction of the governor. This alors will always result in a signal being generated to trip the diesel engine regardless of how it was started.
If the diesel engine tripped'at a speed beyond the designed overspeed trip setpoint.. it could cause internal damage to the diesel engine.
This alarm could be caused by a malfunction of the Woodward governor such as a loss of oil or linkage problem.
=
The Woodward-type SG overspeed trip is basically a -rotating flyweight which increases force in one direction as speed increases. This force is opposed l
by spring pressure. Thp4Arpe SG overspeed trip is self-resetting after the diesel ensisie hda tr, and engine -speed drops.
The overspeed trip vsJ' e. device with two latches on it are not self-resetting, and=tre OAO must be directed to reset these latches once the cause of the o9u speed has been corrected. When the latches'are -not reset (down). air f s supplied to the fuel shutdown cylinder and combustion air valves. When an overspeed trip occurs, air. is rapidly supplied to the fuel rack shutdown cylinder, running the ' racks to "no fuela and closing the combustion air valves.
Refer to-the applicable annunciator t**ponse procedure for specific actions
~
4 to perform.
Determine if the 0A0 h+1 noticed the approximate speed indicated on the engine control panel it +he time the diesel engine 8-5
LO-IU-11202-008-01-ci Respond To Diesel Generator Miscellaneous Alarms tripped.
Direct the OAO to observe for oil leaks. normal oil level. or loose linkage to the fuel oil racks, t
Take corrective action.
Notify the SRO of the situation including the time of the trip. The.SRO will declare the DC inoperable and refer to Tech Specs. Idittate an MWO for
. Maintenance to investigate and correct the cause of the trip.
Once the condition has been corrected, which will probably be after inspections and investigations into why the overspeed occurred. direct the OAO to reset the overspeed trip device which is located at the front of the diesel engine to the right of the governor trip.
This is done manually by depressing the two latches until they latch and hold. Direct the OAO co depress the EMERG ST0p RESET pushtutton on the engine control panel.
Direct the OAO to initiate a Standby Status Check on the diesel generator.
When the overspeed trip device has been reset and the EMERG ST0p RESET pushbutton has been depressed by the OAO. the diesel generator could restart if a start signal is present. However, operability testing may have to be performed before the DG is. considered operable.
Log the activity.
Log the activity in the control room log.
F01 DGIA LOW PRESS CONTROL AIR Acknowledge the alare When the alare is received in the control room. the operator should note other associated alares -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 l
annunciator horn and changes the annunciator window from a flashing light to a continuous light.
Investigatetheialahe'.i The control sir portion of the diesel _ air system is tapped off of the starting air header ixs the diesel generator af ter the strainers and before the solenoid air-operated start valve.
The Starting Air System is regulated-to maintain approximate 1v 60 psig control air pressure.
This alarm will annunciate if the control air pressure decreases to approximately 55 psig or less.
The possible causes for this alarm includet the' failure of the-control air pressure tegulator, a leak in the control Air System. starting air being isolat ed f rom the diesel engine. or starting air pressure less than 55 psig.
Refer to the annunciator response im r for specific actions to 4
e perform.
Direct the OAO to verifv -
oftot air pressure at the 8
LO-10-11202-008-01-C; Respond To Diesel 02nerator Miscelleneous Alares I
f engine control panel. Direct the OAO to check for leaks, Check for the LOW PRESStfRE STARTING AIR alarm.
Take corrective action.
If the starting
- air pressure is low. take action to restore the start.ing air pressure to normal.
If the starting air pressut.e is normal with no leaks. the alem could be caused by a malfunction of the cont rol air pressure regulator.
If this is the case. initiate an MWO for Maintenance to investigate and repair the regulator.
If the diesel generator is already running and the alarm comes in, be aware that the shutdown cylinder will not close when required to shut down the diesel generator if the i
control air pressure diminishes. Refer to Technical Specifications as arpilcable.
Log the activity.
I Log the activity in the control room log.
t F03 DG1A HIGH PRESS STARTING AIR Acknowledge the alarm When the alarn is received in the control room, the operator should note other associated alarus which may provide cert.inent information when investigating the cause of the alarm.
When all alarms have been noted, the alare 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.
Investiaate the alars.
This alarm occurs when the starting air pressure increases to 260 psig.
i The possible cause for this alarm is the failure of the air compressor switches to shut off the air compressor.
This alarm is common for both air compressors.
Direct the 040 tim the actual starting air pressure atw the engine control pansL and at,ths air receivers.
The starting air compressor showing greater ther 260 poi is the af f ected compressor.
MJ Take corrective action.
If the affected air compressor is still running, direct the OAO to stop it at MCC INBI (1NB0 for B train) and to ilepressurize the affected air start
- receiver until--the pressure decrease to approximately 250 psi.
Direct the OAO to continually monitor the starting air system which was shut down.
Direct the OAO to restart the air mmpimor if the pressure decreases to approximately 225 psi and to stop it
..h-n the pressure rises to 250 psi.
Immediately initiate an MWO for % in-voce en check and repair the starting air compressor. Once the i u
'e,n ha been corrected, direct the 8-7
o LO-10-11202-008-01-C Respond to Diesel Generator Miscellaneous Alarms OAO to place the air compressor control switch back to the AUTO position.
Not i f y the SRO and determine diesel generator operability.
\\
J l
1.og t he act ivit y.
Log the activity in the control room log.
F05 DGIA FAlt.t'RE TO START i
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 th alarm is acknowledged by depressing the ACK pushbutton whic.: silences the
<4 annunciator horn and changes the annunciator window from a flashing light
}
to a continuous light.
Investigate the alarm.
This alarm will occur if the diesel engine failed to reach 200 rpm 5 seconds af ter it had received a start signal.
This alarm could be caused by a malfunction of the Fuel Oil System. the Starting Air Syst.em, or the Electro-Pneumatic Control System.
If the start attempt was automatic due to a loss of off-site power or a safety injection, ensure the other train's diesel engine is running and operating correctly.
Check for other alarms associated with this alarm.
Observe the fuel oil day tank (DFO) level gauge (0 to 100-percent range) on the main control panel to aid in determining if the cause of the failure to start may have been due to loss of a fuel oil supply.
Direct the OAO to check the alignment of the Starting Air System from the air receivers to the die 6el engine and to check for misaligned valves in the Fuel Oil System from the day tonk to the diesel engine.
Take corrective action.
Notify Plant Engineeri Services of the event. Direct the OA0.$o correct any misalignments.t 1f.41 leak was determined, initiate an HWO for Maintenance to investigata and repair the leak.
Attempt a restart if necessary.
Refer to Technical Specifications if necessary. Notify the SRO of the situation A.
Log the activity.
Log the activity in the control room log.
Also report the details of this failed start to the Shif t Supervisor. since Technical Specifications direct that the test frequency of the diesel generator is increased if a certain number of failures occur.
F06 DGIA SWITCil NOT IN AUTO 8-8
LO-IU-11202-008-01-C; Respond To Diesel Cenarctor Miscellaneous Alarns Ack.nowledge the alarm When the alarm is received in the control room, the operator should note other associated alarms which may provide pertinent information when inve se igating the cause of the alarm.
When all alarms have been noted-the alarm is aclinowledged by depressing the ACK pushbutton which silences, the annunciator horn and changes the annunctator window from a flashing light '
to a continuous light.
Investigate the cause of the alarm.
This alarm occurs when one or more of the diesel generator control switches
('
is not in the AUTO por,ition.
h Determine the cause of any switches out of position.
Switches may have been repositioned for the fuel oil transfer pump When this alarm occurs, notify the SS. o*termine why the switch is not in auto, and place the switch back in ALTO.
c Take corrective actions.
Direct the OAO to check and plac? the control switches (locally) in AUTO for the following:
e
-Jacket water heater
-Lube oil heater
-Jacket water keep-warm pump
-Lube oil keep-warm pump
-Starting air compressor 1
-Starting air compressor 2
-Air compressor after cooler fan 1
-Air compressor after cooler fan 2
-Generator heater Log the activity.
Los the event it the alarm is not expected. Loss of the lube oil keepwarm pump can make.he DG inoperable.
5 '
w F07 DG1A RARRING DEVICE ENGAGED This alarm occurs when the barring device has been engaged to prevent operation of the diesel generator during maintenance activities; this is an expected alarm. The DG is inoperable during this operation.
I F08 DGIA PANEL INTRUSION This alarm occurs when the engine control panel door is opeu.
Acknowledge the alarm 8-9 a-_-_____-_-_
- _ = _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ - _ _ - - _ _ - - _ _ - _ _ _ _ - _ _ _ - _ - -
.--.---n--._.._~--
n.2 f(yg LollU-ll202-008-01-C Reepond To' Diesel Generator Miscellaneous Alarms When the alarm is received in the control room. the operator should note other associated alanas which may;' provide pertinent-information when investigating the cause of -the alarm.
When all alarms-have-been t,;+ed, the alarm 11s acknowledged by depressing the ACT. pushbutton which silences the annunciator horn' and changes the annunciator window froa a flasuing 1,ight Lto a continuous light.
Investigate the alarm.
Direct the OAO find out who opened the door, and why.
,Take corrective actions.
Direct-the OA0 to reclose the door.
NOTE: The engine control pacal door must never stay open unnecessarily-because dust, moisture, o-deta s could accumulate inside the panel.
i Log the activity.
This action will not bi aogged, unless the intrusion was of a suspicious nature.
F09 DGlA HI TEMP PANEL Acknowledae 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 annunciater horn ana chants.s the annunciator window from a flashing-light to-a continuous light. -
. Investigate the alare.
This alarm occurs when the temperature insida the engine control panel.
reaches 130. degrees F.
-This alarm could be caused-by Wrerheating of the
. controlcircuitrBinitMenginecontrolpanel,or:hightemocraturedetected in the diesel generator room.- Two additional sources of heat'in the engine control panel are the interior light and the 250-watt strip heater.-
Check the fire monitor panel for alarms and initiate Fire Response Procedure if-necessary. Direct.the OAO to check for-any unusually high' temperature in the' diesel generator room-and to check for-smoke around the engine control panel. Direct the OAO to' observe the. strip heater for normal operation', Direct h' m to ensure that both the panel and room are i
Ladequately ventilated.
~
- Take' corrective actions.
Take corrective action depending on rhe l' V) investigation.
If a fire is expected, activate the fire alarm.uwom e the fire throughout the plant.
8-10
.=
m..._
d 4
-LO-IU-11202J009-01-C Respond To Diesel Generator Miscellatieous Alarms r-and notify the Fire Brigade per 92005-C.
"/ ire Response Procedure."
Initiate an MWO to restore ventilation if it has malfunctioned.
Log the activity.
l Log the activity in the conttol room log.
i F10 DG1A EMERGENCY START Acknowledge the alare When the alarm is received in the control room, the operator should note other associated alarms which may provida pertinent information when investigating the cayse-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.
This alarm'is expected when the diesel i;nerator _has been started from a U
safety injection signal or from a manual emergency start.
Only four-automatic trips _will exist when the diesel is running under an emergency start, The trips are:
- 1.. Low pressure lube oil trip 2.
High jacket water temperature trip 3.
Engine overspeed trip 4.
Generator differential trip If this alarm occurs, the diesel generator has started.
If this was a manual ~ emergency _ start, the control room personnel will be aware of it.
If it was antauto emergency' start. refer to Plant'Vogtle-Procedure' 19000-1. if'
' not'already entered.
This. alarm does not indicate a malfunction to be investigated. Direct the. OAO-to monitor the diesel generator and.to closely monitor _the equipeent in'the diesel generator roca.
The OAO must
. he aware that the diesel generator will not trip on any trips other than the ones listed above.f s
take corrective actions.
Refer to Procedure 13145-1.
" Diesel Generator Operation Under LOCA
- Conditions.".as the operational situation allows. The procedure directs how to emergency: start manually, what should be monitored, and how to shut down af ter an. emergency start.
Los the activity.
Notify the SRO of the situation and the activity.
DG1A LOCAL AtlN PNL PWR FAiLURt a
8-11
LO-1U-11202-008-01-C1 Respond To Diesel Generator Miscellaneous Alarms Acknowledg9 the alarm When the as tra is received in the control room, the operator _should note other asso 'ated alarms which may provide partinent information when investigating the cause of the alarm. When all alarms have been notedi the alarm is acknowledged by depressing the ACK pu1hbutton which silences, the annunciator horn and changes the annunciator window from a flasiting light to a continuous light.
Investige.te the ala m Prior to installation of this alarm.
it was possible to have diesel generator alarms and. because of a loss of power to the annunciator circuitry, not be aware that the alarm had occurred.
Audible horn and annunciator power is supplied through circuit breakers 9 and 10 and is supplied from distribution panel 7ND31. breaker 07. This is non-class 1E 125-VDC power; breaker 07 also supplies "C" power which has an indicating light on the front of the engine control panel.
Notify the SS.
With no other control room or local DG annunicators available for the-DG (using 1A as the example). a determination should be made as to the operability _of the DG since other malfunctions would not be
- alarmed, Take corrective actions.
Dispatch the OAO to close breaker 07 on IND031. and to verify closed breaker CB9/10 inside the engine control panel.
Verify annunicators re turn.
Log the event.
Notify the SS of.the return of annunicators, and length of time without the annunciators.
808 DG1A ENGINE.
PO WR A FAILLPE
.B09DGIALENGIE([
POWER B FAILURE s
li _
' ". /:
Acknowledge the alarm-
-When the alara is receivsd 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 annunciator horn and changes the annunciator window from a flashing light to a continuous light.
. Investigate the alarm.
There are three 12SV DC control powe, itcuits for the diesel engine controls.
8-12
LO-1U-11202-008-01-C Respond To Diesel Generator Miscellaneous Alarms A power and a power are two separate circuits with the following simulator functions:
--douctivation of shutdown (on SIS)
--field flashing
--starting air solenoid energizing
--loss of offsite power start circuits
--speed switch circuits A circuit powers the optical isolators while allowint alarms dealing with electrient circuits (relays. generator alarms, etc.) to be annunciated.
B circuit powers circuits which allow operational and maintenance modes and the electrical circuits used in stopping the DG.
Probable causes incluues (For the A power alarms for DQ1A)
--breaker 1AD11-11 on panel 1AD11 is tripped
--breakers CB1-2 (ganged) right front of PDG-2 tripped
--loss of control air pressure (For the B power alarms fer DGIA)
--breaker IAD12-11 at panel 1AD12 is tripped
--breakers CB3-4 (gan2cd) on f ront of PDG-2 is tripped
--loss of control air pressure Take corrective actions.
Control Tower A - Dispatch the OA0 to ensure breaker 1A11-11 is closed, breakers CB1-2 (ganged) on PDG2 are closed, and ensure control air system pressure.
Control Power B - Dispatch the OAO to ensure breaker 1A12-11 closed, breakers CB3-4 (ganged) on PDG1 are closed, and ensure control air system pressure.
DG1B stop logic is no longer available.
The engine must be stopped locally using the Push-To-Stop switch or by manually actuating the overspeed trip device.
CAUTION:
The engine should not be started with Control Power B deenergized.
All electrical trips and remote stopping capabilities have been deactivated.
It the condition cannot be corrected, declare the DG inoperable and refer to Technical Specifications.
Log the activity.
Notify the SRO of the situaticn and lo-
'S-orivity.
8-13
-~
LO-1U-ll202-008-01-Ci Respond.To Diesel Generator Miscellaneous Alarms PERFORMANCE GUIDE Follow these steps to respond to the diesel generator, miscellaneous al' arms.
'l.
Acknowledge the diesel generator miscellaneous alarm.
2.
. Investigate the alarm.
3.
Take corrective action.
4.
Log the activity.
3 N
8-14
LO-IU-11202-008-01-C; Respond To Diesel Generator Miscellaneous Alarms
+-
SELF-TEST Before proceeding to the Task Practice, answer the following questions.
1.
Given that the DGIA TRIP HIGH TEMP ENGINE BRG alarm has annunciated.
if the diesel generator has shut down (started under a normal start).
you must verify that a source of power is available to the Class IE 4160V bus by observing 2.
The most likely causes for a sudden increase in crankcase pressure are
. or allowing combustion chamber pressure to ptessurize the crankcase.
3.
The DG1A TRIP OVERSPEED alarm occurs when the diesel engine speed reaches i
4 8-15
x ;'
LO-IU-11202-008-01-C; Respond To Diesel Generator Miscellaneous Alarms ANShTRS 1.
an ammeter reading on 1AA02 NORMAL INCH AMMETER and verifying a normal voltage of approximately 4160V shown on the 4.16KV TRA SYS voltmeter.
2, explosion of vapors inside the crankcase. a sudden break or failure of a position or cylinder 3,
51),$ rpms,
_ s,7 &,f.^
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LO-IU-11202-008-01-Ci Respond To Diesel Generator Miscellaneous 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 understand all precautions, limitations. and steps associated with responding to miscellaneous DG 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 miscellaneous DG alarms.
3.
In the control room or simulator, simulate responding to miscellaneous DG alarms.
If possible, have a fellow trainee evaluate your performance using Procedure 17035-1 and this instructicnal unit.
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LO-IU-11202-008-01-C; Respond To Diesel Generator Miscellaneous Alarms 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 with responding to DG miscellaneous alarms.
If you had any dif ficulty, ask your. instructor for help.
3.
You should have simulated the steps necessary to_ respond to diesel generator miscellaneous alarms.
If you had any difficulty, re-read
' the pertinent sections of this instructional unit and the procedure.
Resolve any questions with your instructor, s
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