ML20113G561
| ML20113G561 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/10/1989 |
| From: | Allison S GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-192-000B-90, CON-IIT5-192-B-90, RTR-NUREG-1410 LO-IU-11202-006, LO-IU-11202-6, NUDOCS 9202210476 | |
| Download: ML20113G561 (15) | |
Text
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GEORGIA POWER POWER GENERATING DEPARTMENT V0GTLE ELECTRIC GENERATING PLANT INSTRL'CTIONAL l' NIT TITLE:
RESPOND TO DIESEL GENERATOR NUMBER:
LO-I U-11202- 00 r,-01 -c DISABLED ALARMS PROGRAM:
LICENSED OPERATOR REVISION:
1 Al' THOR :
S. ALLISON DATE:
7/31/89 h((
DATE:
f//C/j"2 APPROVED:
'V0GTLE PROCEDURE 17035-1. ALARM RESPONSE PROCEDURES (REV 41 9202210476 920116 O
PDR ADOCK 05000424
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I.0-IU-112 D 2 -006-D I - C : Respond To Diesel Generator Disabled Alarms PERFORMANCE OBJFCTIVE Given t hat
-t didsel gene rator " disabled" alarm has annunciated. tespond to the diesel venerator " disabled" alatm.
All communication and activitles must be performed in accordance with current, approved procedures.
-The alarm must be acknowledged and its salidity determined.
A plant equipment operator must be dispatched to
-perform activities locally. as necessary. MW0s must be initiated as needed.
INFORMATION Tbc following diesel generator " disabled" alarms are covered in this instructional unit:
1.
DGIA DISABLED LOW PRESS STARTING AIR 2.
DGIA DISABLED DC START POWER FAILL'RE 3.
DGI A DISABLED ENGINE CONTROL IN 10 CAL 4.
DGIA DISABLED NONRESET OF EMERGENCY TRIP 5.
DGIA DISABLED DG CKT BRKR INOPERABLE 6.
DGIA DISABLED MAINTENANCE LOCKOUT 7.
DGIA DISABLED GEN CONTROL PWR FAILL'RE These alarms indicate conditions that could lead to the inability of t.he diesel generator to start and load automatically when required to in an emergency.
Some of these alarms indicate that the diesel generator will not start due -to interlocks, l'pon receipt of any one of these alaims, obtain Plant Vogtle Annunciator
_ Response Procedure 17035-1 (17638-1 foi DGIB) and acknowledge the' alarm.
Depress the SILENCE push button to silence the alarm horn.
When responding to any one of the di-sel generator alarms:
1.
Acknowledge the alarm. When m Lw+1rdging the alarm, note any other alarm that may have annunciateil.vsociated with this alaim.
2.
Investigate-the alarm.
Perform
'hr-initial operator actions required for the appropriate alarm as !; t r i in the procedure. Dispatch a _ PEG to-perform the local subsequ-n' m"r a tor act ions as listed in the procedure.
Determine the vali'
- d th-alatm.
In most cases.
the pgD_'s readings of local indii a
.i!I
- w. omplish this.
3.
Take corrective-action (s) to
-ndition causing the alasm.
4 1
Af ter the condi t ion has been < ; *
-f the alarm.
Ensure that t
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~
LO-1U-ll202-006-01-C: Respond 'lo Diesel Generator Disabled Alarms the PE0 resets the alarm locally.
Initiate MWon as needed. Note anv 4 h ine of alignment or switch positions that have been made to artee:
the operability of the diesel generator.
Refer to Technical speifications for the diesel ranerators where applicable.
Notify e r (E0 of the situation.
4.
log the w t ivity, log all pertinent information in the control room
- log, r02 DGIA DISABI.ED LOW PRESS STARTING AIR This alarm will activate at a starting air pressute of 215 psi, decreasing The normal air pressure for each teceiver is 225 to 250 psig. The diesel engine has a starting interlock of 150 psi starting air pressure (the starting air pressure must be greater than or equal to 150 psi in order tot the diesel generator to start). This interlock applies to emergency starts (manual or SIAS),
With less than 150 psig starting air pressure, it is still-possible to attempt a notmal start of the engine.
It is daubtful that the engine would start with statting air pressure less than 90 psig.
Acknowledge the alarm.
Note the time the alarm annunciated and inform the SRO of the time.
Investigate the alarm.
r Direct an 0A0 to check the starting air pressure at 1-PI-9052 and 1-Pl-9056 on the engine control panel to determine the system that is affected.
Direct the OA0 to check local gauges 1-pi 4060 and 9064 for starting air pressure and compare the readings with the ones on the engine control panel.
Direct the OAO to ensure that the starting air compressor breakers on the MCC are closed and the handswitch indicating light '(amber) is illuminated.
Direct the OA0 to check for low oil level in the air compressor using the dipstick and to observe for air leaks. Also. direct the OAO to check air receiver isolation valves (765 and 769) are open.
Take corrective action.
'If low oil level is observed, oil sh"old ha added before starting the air compressor.
Initiate an MWO for r h.
aiI addi, tion.
The starting air compressors will trip on a low oil
."l-Direct the OAO to reset the breaker if t ripped, and to reset H.
4il m erload.
If the tarting air
-pressure is still low with_ the bi-c.
-a til closed, direct the OAO to place the handswitch in MANUAL'to :-
t-the ptessure to 2",0 psi. Init iato an MWO to have the starting air com v itch repaired.
Direct the OAO to remain in the diesel building ot
'" nance has been performed on the starting air switch.
If an ait ad in the ait compressor, direct Maintenance to investigat"
' ik.
When the cause of the low air pressure is determined
- et the alarm.
Note the t ime t he condi t ton was cot t er '-
to thr 9Rn, Refet to t,.
4-
s LO-It'-i l 202-006-01 -C : Respond To Diesel Generator Disabled Alarms o
i Technical specifications if there is not a bank of starting air operable with tereiver pr essure greater than 210 psig, s
Loe fho -p:tititv.
Log the.v:t ivi t e - in t he contial room log.
J l
l'04 DGIA DISABLED DC START POWER FAllt'RE Acknowledge the alarm.
Note the time the alath, occurred and report this to the SRO.
Investlaate the alarm.
Dispatch an OAO to assist in verif ying that the diesel generator is operable and that the alarm is valid.
If the ala rn: is valid, the diesel 1
generator must be declared inoperable from the time the alarm annunciates, i
The OAO must check the control air pr essur e gauge on the engine control 7
panel (normally 60 psig). Direct the OAO to check-for DC power failure at the engine control panel.
Normally, the thtee white lights indicating A.
B. and C power available are. lit.
This alarm will be present if there is no "A" or "B" 125VDC control power for the diesel generator control circuits.
The A and P circuits are Class 1E: if both are unavailable. the 4
l-diesel generator will not start.
"C" power is Non-Class IE power and a
loss of "C" power is not one of the causes of this alarm.
The diesel generator should still start with one of the two circuits available, but 1
not in a normal configuration. Generally, if "A" power is not. available.
several alarms will not be operaole.
If "B" power is not available, some of the emergency stop features will not function (including manual).
These conditions can lead to equipment damage: therefore, the cause of "A" i
"B" power loss must be found and immediately corrected.
If the "A" power waite
' light _is not lit and the two. breaker swi t ches f or "A"' power are closedi direct the OAO to check distribution panel 1ADil.- breaker 72-11.
If the "B" power white light is not lit and. the two breaker switches are closed, i
tlirect the '0A0 to check dist ribut lon p uml IAD12.. breaker 72-11.
Direct the OAO to check for tripped breaker f or "A" and "B" power on the f ront of the engine control panel. (Train A M for this example.)
Take corrective action.
If-one of the DC breakers at the encino control panel has tripped.
direct k
the OAO to teset the breaker and s m i f >
that the white light is illuminated. then reset the alarm.
!! 'he OA0 reports that the breakers for "A" or "B" power are closed at . -noine control panel. yet the white light (s) are not lit. direct the o m -
h-k the breaker at the applicable distribution panel, then to reclo e 1J' VDC breaker there. If the LOW
~ PRESS CONTROL AIR alarm is illumine t the OAO to take corrective action to restore the control air !
hn the condition has been corrected, reset the alarm.
Notit.
time the-condition was w;
4 LO-li'-ll202-006-01-C: Respond To Diesel Generator Disabled Alarms cotrected. -Refer to Technical Specifications as applicable to thiv situttion, P
fop the
-t e t i vi t v..
Log t he act ivity in the control room log.
005 DGIA DISABLED ENGINE CONTROL IN 1.0 CAL This alatm will activate when the LOCAL / REMOTE cont rol swi tch on the generator cont rol panel has been placed in the LOCAL position.
Acknowledge the alarm.
Acknowledge the -alarm. noting t he t ime and r eport ing t his to the SRO.
The DC is inoperable refer to Tech specs.
Investigate the alarm.
Direct the OAO to verify the position of the control switch at the genetator control panel, l'or Train A this control switch is HS1516, and a red indicating light above the switch is lit when the switch is in LOCAL, NOTE: Any time the diesel generator LOCAL / REMOTE control switch is; in the LOCAL position the diesel generator is not available-for emercenev start and, therefore, is not in standby readiness.
If the control switch is placed in LOCAL, the diesel generator will not start automatically on receipt of a safety injection actuation signal-(SIAS).
The diesel generator will not he in standby readiness.
If the control switch is in LOCAL. direct the OAO to determine why it has been placed in this position.
Direct the OAO to observe the atea for the presence of any personnel and to ask if they Lknow why the control switch has been placed in LOCAL.
NOTE; Indiscriminate changing of switches for the diesel generator must never be done without p t i. r approval from the control room.
Take corrective action.
When the reason for the switch beins in 10 CAL has been determined, report this-tu the-SRO.
Direct the OAO to.Io-the control switch back to the
.REMGTE position. Then the switch; i-1+ k'in REMOTE. the diesel can be auto-started ' r st arted f rom the d,n! : = 1 room. Notify the SRO of the length o
of time the diesel generator we im ib l o due to the switch being in LOCAL.
f.og the activity.
log the activity in the control ii l
t r
t, - i.
a e
i 4
10-!!'-11202-006-01-C: Respond-T6 Diesel Det.
- tor Disabled Alarms C10'DGIA DISABLED NONRESET EMERGENCY TRI')
-The two types of-emergency stops ate manual and automatic. The manual-emergency stop can be performed from the engine. control panel and the conttol room.
The Al'TO - emergency stop includes diesel generatot diffetp W 1 7N :ip. two out of thtue lube oil pressure detectors detyt ing pt er,ut e less than 'to psi. two out of thtee jacket water
( thpe ra t u t e detector s detecting temperature greater than or equal to 200 l
fegrees F. and an.overspeed trip (517.5 tpm).
Acknowledge the alarm.
h knowledge the alarm. noting the time of the ilarm and noting if iny other t'larms ire illuminated that may be associated with the alarm.
Inves.ti gate ' t he alatm.
With assistance-(tom the OAO. detetmine the cause of the emergency tripi The cause of a manual emergency ttip will be known because either the OAO initiated it locally at the breakglass switch ot the LO emergency stopped the diesel.at the QEAB by depressing both of the emergenev stop pushbuttons at the same rime, in the event of an auto emergency trip due to generator differential telai t ripLor an overspeed. the diesel generator cannot be rest arted until the ovetspeed trip device is reset or differential lockuut relay 1%A has been reset.
In hath c ases, the cause of each must' be determined and cortected before attempting a testart.
Take corrective action.
-If-the alatm is present and the ' diesel generator had tripped due to low
_ lube oil-pressure or high Jacket wat er temperature, perform t he actions listed inithe annunciator response procedures for each.
Corrective actions-for leaks are usually. performed by. Maintenance.
NOTE: He prepared to direct the OAO to correctly reset 186 lockout relays at the generator control panel by ensuring-that:
The condition originally causit.g t he primary relay to " pick : tip" a.
has been corrected.
In most
- cases, this will be after maintenance, b.
The RELAY TARGET RESET pushb ntJn located on the right side of the relays on the generator +ontial panel is reset locally. 'This ht eaks the-seal-in circuit s of t he primary relays, and allows the OA0 to reset the target t hes af t he primary nelays.
c -.
_The OA0. resets the prim.ny rela > t-uger flags by pushing up on the pushtod in the fi ont m-r f t he relav.
The otange flag wil.1 not-be visible when t % nushrol is released.
d.
'The'0A0 must never teser a 1,koor o l.n (186) unless ditect"d to do so. Direct-the OAO to
-a
!% telay only after the 4
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f' LO-tU 11202-006-01-C: Respond To Diesel _Cenerator Disabled Alarms J
v reasons for its tripping have been determined and corrected arid the OAO has been directed by the shif t supervisor to reset it.
Procedure 10007-C describes how permission is obtained to allow t ert t ing of -a lockout.
The shif t' 56pervisor may authorize resetting of a DC overcurrent telay one time..without investigation,
. A telay tar get may be. reset if the target is. showing with the equipment is running. Permission must be obtained from the SS.
If the nlarm is-prevent, and the diesel generator tripped due to one or more of the thtee 187 differential relays detecting a fault. verifv it by directing the OAO to:
a.
Check that the DCIA TRIP GEN v1FF alarm has annunciatwi on the anuunciator panel b.
Check for target Ilags on the 187 relay for each phase c.
Check that the 186A lockout switch has tripped over to the TRIP position.
.The cause of-the differential alarm causing the diesel generator to emergency trip must be determined by Maintenatice and corrected before an attempt is made to reset the diesel generator.
Af ter.the -causes have be u cor rected. - the EMERGENCY TRIP RESET - push" button will be depressed af ter the dif ferential (187) t. rip primary has had its targets reset and the 186A lockout relay has been reset. The emergency reset pushbutton is-on the engine control panel; the 0A0
.would normally-reset the emergency stop.
,The DGIA TRIP OVERSPEED alarm indicates the diesel generator tripped
-due to an overspeed.
In this case, direct-an 0A0 to check the governor for loss of oil or Imse or damaged linkage.
If. necessary, initiate Maintenance-to-inves,tigata.
Determining the cause of the m.4 speed of the relay trip may include anLextensive. investigation prim to the diesel generator being declared operable again.
Ditut % intenance personnel to investigate
-the telay1 trip or overspeed tttp.
Wheit the cause has been deter mim~! nid corrected, direct the OAO to reset the overspeed trip devii" tho differential relay and lockout switch. Then direct the OAO r.
r m
the EMERCENCY TRIP RUET push-bty t ton.
NOTE: The Woodward type SC m."
p osos the principle of centrifugal force caused by ias i; hts to lift a plunger.
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_m
_ ~ - -.. _ _
_s LO-IU-il202-006-01-C; Respond-To Diesel Generator Disabled Alarms with a spring opposing-this - fo rce. -Wiien an overspeed occuts.~the Woodward _ type SG overspeed trip-(which is self-resetting) causes
! ' nk..tge. to. disengage two latches un the overspeed ttip device, Tht:,
m e, air to be supplied to e.stetui, t he fuel shutdown 'cyl' ndet and i
a se the combustit.n air supply -dampets. The-overspeed trip device unst-be marunity-reset by relat-ching the two over speed t rip air latches; the device will-stay re-latched because the Woodward typ4 SG ovetspeed-tilp has already self reset.
P After' Maintenance has performed their investigation, ronfet with the SRO for further-guidance.
When directed bv the SRO.
proceed in.
restoring the diesel generator to either standhv readiness or restatting.
Log the activitt.
Log the act.ivi.ty.in the conttol toom log.
D10'DGIA DISABLED DG CKT BRER IN0FERA3LE
-This alarm is-in response to a loss of DC control power, the breaker not racked in, or the placing of diesel denerator output circuit br e iker
- cont rol switches -into_ positions not allowing the breaker to close automatically 4 if required to, : af ter the die.el generator has started.
The diesel generator will start with this alarm p:esent-but will.not be able to automatically tie-into'the ESF bus if 1c3s
.f normal power occuis, Placing.the. output-breaker cont rol ' swit ches on QEAR to pull-to-lock (1-115-1-AA-0219) also causes this alarm: the diesel generator will be-((
disabled < When: the _DG circuit = breaker is inoperable, the DG is inoperable:
refer to Tech specs <
Acknowledge the alarm.
Acknowledge the alarm.- notir,g the t is and reporting it to the SRO.
- Invesituate the alarm.
Direct-the auxiliary building opeiat,
,,, ptoceed to the genetator ourput
- breaker for the diesel-generator ( l i v.N and to see if the transfer
- contro1 + witch (1-HS-AA02198) is in +
10C\\L position.
This control
- switch is labeled CONTROL ROOM!LOCT!
tf ameone inadvertently placed this
- wit ch - in the LOCAL ' position (i t wie i n t he CONTROL R0051 position).
- this alarm would occur.
On QEAB n
.tiol toom check, to ensure that the local control-' switch for the
.mr in the PFLL-To-10CK posit lon. Ditect the ABO' to check N
m t rol powei is o n.-
Take cortective action.
Direct the ABO to place the switch
.n't po. i t ion.
Notity the SRO of the situation _and the 1 witc h we in LOCAi if 0-7
6~
.1
'LO_-IU-11202-006-01-C;; Respond To Diesel Generator-Disabled Alarms 4
the breaker contro1' switch on QEAR was in-pull-to-lock, place it-in AUTO and n it ify 't he SRO.
-t!og the ai:tivitv.
1vy.the attritt in the control soom log.
F E10 DGIA DISABLED MAINTENANCE LOCKOUT This alarm will be. expected _when maintenance is being pet fmmed on the
-diesel generator. With this alatm present, the diesel generator will not start in manual or automatically.
Acknowledse the alatm
~When the alarm is teceived in the control room, the operator should note other associated alarms which may provide pertinent information when investigating the cause of the'alatm.
When all alatms have been noted. the a'larm is acktiowledged _ by depr essing the ACK pushbutton which silences the tutitunc tatur. hot u-and changes the annune tator window Irom a flashihg light tola: continuous lighti Investigate t'he alarm.
Direct the OAO to go to the diesel enerator toom.
If this alarm actitsto, unexpectedly. this-indicates that
-omeone has inadvertently placed the
' LOCAL / REMOTE' switch in the LOCAL position and has pressed the '!AINTENANCE pushbttton.
Refer to Technical specifications since the diesel generator stattis is inoperable when _it _ is in H INTENANCE (or LOCAL) mode.
NOTE: Changing _ the diesel generat or switches without-prior approval must never be--done.
-Take corrective actlon.
Notify the1SRO.
Determine why t he~ M t tch kw placed in-LOCAL.
When the reason has been remedied direct.the MO to depress the RETT'RN TO OPERATION mode pus _hbutton on the engine cont rol panel'. When it is desired to r:e t u rn -
i to normal operation, direct the n ',0
?-
place HS-4516 into the REMOTE
-_ positlon.
- Log the activity.
slog the zwtivity in-the control rom Ensure that the SRO is'- no'tified of t'he time the diesel generator w e
-- b,porable again.
-B10 DGlA DISABLED GEN CONTRGi
- rRE
- 125'VDC is the source of cont a al -
- cid flashing (on start).
- opetation of the regulator and bi i '
Itice courtol
> witches and pushbuttons.
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-1.0 IU-ll202-006-01-Ci Respond To Diesel Generator Disabled Alaims l1 g
h.
The trijfping of br eniker 1 AD11-06 or the' supply breaker tit PDGl~(right-hand
-i
-h16 wi j l-catise this alarm to annunciate. -For B- -t rain,- this would be 100 2
i 114.-uei t he br eaker on PDG3.
L
[_
Teknowlelye the alaan.
. Check for uther powible associated alarms.
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Insestigate the alaim.
. Send the OAO to check the two hteakers.
e 39 1'
4 Take-corrective action.
.i
[
'e OA0 to reclose the open breaker The _ diesel genetator is.
I Direct i
inoperable from the time the -alarm appears until the DG operability-is
- )
- proven. h'ith t he engine in standby. no field--flash will be wailable fot 1
the generator, i
l '.
Log the activity.
t l~
. If the ptoblem cattnot be corrected, declare the-DG inopet able and t af er to.
i
. Tech' specs.
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- 1.0-i t!- 11202-006 C : Fespond To Diesel Geneistor Disabled Atatms-i i
s PERFORMANCE Gt'1DE-
' rollw t ttese st eps to t espond t o a diet el gene r;it or "<llsablert" ilaim.
1, Acknowledge the diesel getiet htor " disabled" :ilaim.
2; Trivestigate the alaim.
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Take tottcetive'actlott, 4;
log the -activit y.
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1 10-It'-11202-00f-01-C. Respond To Diesel Generator Disabled A1.uins
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1.0-10-11202-006-01-C1 Responii To Diesel Cenatator Disabled Alaims u
Befoie etm e liitg to the Pe t fot uunce Tes t.. t omple = = the followton T.isk J
h at tit, ews -t e(S).
l f
I, Nt*V $ t*w fl ot?e* fill e
!?035-1.
He stite lluit you attirle s s t ariti si l.1 pi ecaut loris, limit at torm and St eps awoci:ited wi t's i rmponding t o DG s
"Di sabled" riliit ms.
j take + his instruct ional unit and Pt ocedut e 17035-1 to the control inom 2,
or simulator.
De sut e ' tha t you can locate all ins'tumentatinn as oe'ated with ter.ponding to DG "Di$abled" altirms.
-I.
IH t he Collt f01 TOOM Ot* $ { mtlla t O T. %smulate t e%pOfadiUp t o D(, "D j Aahled
ilaims.
If possible. have -a fel1% t rattiee evaluate yout perlotmance I
using. Procedure 17035-1 and this inst iurt ional unit.
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6-11;
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in Itt-11202-006-01-c: Respotui To Diesel Generator Disabled Alatms ITFDitACI: ON' T Ae4' PRACTICE if son have 4ny questlotts aleut the precautions. 1imi t til lens, or 5 teps in Ptin eduta 170M-1. ask your litst ruct or.
2.
YUti ellouId haVe bt'en MIf } e tO 1004te al} in$trumentatich a% %o( (a t esl wi t h t esponding to I,0 " Disabled" olatms, if yott had any.dt t ficult y, ask your instructor lot help.
II.
You %hottid lUIVE $ lltull It tad t.he blep4 llece%5aty to te%pottd to diewel genet nt or " Disabled" alarms, I f s oli h.ul any dif f icut t y.
se-tend ine pertinent sectlons of t.h i s int,tructional unff ind the proteduto.
f Re%ols e ati.s qtiest ions t.i t h voor instinctor.
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