ML20092F604
| ML20092F604 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 05/27/1988 |
| From: | Gregory Stone GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-002-133B-90, CON-IIT05-193-000E-90, CON-IIT5-193-E-90, CON-IIT5-2-133B-90, RTR-NUREG-1410 NL-IU-11203-, NL-IU-11203-00, NUDOCS 9202190427 | |
| Download: ML20092F604 (12) | |
Text
- - - - - - - - _ _ _ - _ _ _
,: - e e. 3 Georgla Power l Q POWER GENER ATION DEPARTP(Et g
l VOGTLE ELECTRIC GENERATING A
-7 INSTRUCTIONAL UNIT l'
L' TIT t.E :
RCSPOND Tu EMERGENCY DIE.1LL GENERATOR NUMBER: NL-lu-11203-oo-C-oo?
..... 1 AE.E.E T WATFft SYSTEM Al ARHG OUTSIDE AREA OPERATOR OM 3 AUTHOR:
- 6. D. STONE DATE:
10/26/87 pg'#f g
DATE:
g r7 g APPROVED:
/, -
REFERENCED:
/
V0GTLE FMCEDURE 17035-1 ANNUNCIATOR RESPONSE PROCEDURES (REV 3)
--w
,M v--Mn
. s% ~
e-
. qw V-u: w s --N
- % <ku_
-Q,.s W<Y
-=
g% ant 1% W w -
ze & M.
s
- z. m y Q w"
-D
=..a.s I NMb 5
4 i
)
p1" &oyg."
~TA# % y _
' j
,< ;'. ' o n%
P f, 2 4
%e 4
{ },'-
,(
k t
f y
-: - -- - - w,.-;
Wm SitJDENT DATE VAy'
~ T~
o 9202190427 920116 jL
'yl i
PDR ADOCK 05000424 s
m 4
NL-lu-11:03-00-C-002: Respond to Diesel Generator Water Jaclet alarms EEUOM M E 0..lblfS UME Given a directive' f rom the control room,.espond to diesel generator J atl et Water System alarms.
All ccmmunication and activities must be performed in accordance with current, approvec procedureu.
The alarm must be acknowledged and its validity determined.
Actions must be taken to corr ect the condition causing the alarm.
INFORMATION The control room operator will obtain Plant Vogtle Annunctator Response Procecure 170!5-1 (17033-1 for "B" diesel generator), and issue a directive to respond to the alare.
Acknowledge the alarm and determine if it is valid. Notif y the control room operator of the status of the alarm (valid
=
or invaind) and watt for further instructions.
The annunciator panel in the control room f or which annunciator response procedure 17035-1 (170!8-1) was written. is similar to the annunciator panel located at the engine control panel.
The control room operator will issue instructions f or investigative and corrective actions to be performed as outlined in the procedure.
If there are multiple alarms, the control room operator will also determine which alarm should be investigated first.
After the investigation is complete ano the conditions have been corrected, reset the alarm.
DIESEL GENERATOR JAChET WATER SYSTEN The two main circuits in the Jacket Water System are the Jacket water keep warm cartuit and the engine-driven Jacket water pump circuit.
The Jacket water keep-warm pump is electrically driven when the engine 14 not running.
The Jacket water heater uses a thermostat to keep tns water in the Jacket Water System at a constant temperature.
This, in turn, keeps the Jacket water at a constant temperature to 6 eep the diesel engine warm in the STANDBY (not running) mode.
The yacket water pump takes suction from the Jacket water standpipe and cisenerges through the lube 014 heat er:1 anger and into the passages to the diesel engine.
The Jacket water from the ergine returns to the standpipe, completing the cycle.
Once the ungine starts, the jac6et wate-ee: watt :umo stops and the Jacket water heater snuts off.
2-1 J
e NL-lu-ll200-00-C-002 Respond to Diesel Generator Water Jacket Alarms I
i The engine-driven Jacket water cump 1s driven by tears on the front of the engine.
Pump speed ip dependent uoan the speed of the diesel engine.
This l
pump tales suction f rom the Jacket water standpipe and cascharges to the l
Chermostette bypass valve. When the water to the thermostatic bypass valve a s relatively cool, the valve bypasses the jacket water heat extnanger.
As l
the Jacket water temperature in the Jacket water heat exchanger changes, the thermostatic bypass valve will modulate to maintain its desired temperature.
The Jacket water flows through the tube side of the lube oil heat suchanger end into the diesel engine.
Part of the Jacket water flow bypasses the heat enchanger and goes to the diesel engine.
The jacket water from the diesel engine rn+. urns to the standpipe.
The le al temperature indications at the heat exchanger are for the Jacket water going in and coming out of the heat exchanger.
The local temperature Indications f or the nuclear service cooling water (NSCW) monitor NSCW going in and coming out of the heat exchanger.
Col - DCIA LOW TEMP JACLET WATER-IN C00 - DGIA LOW TEhP JACKET WATER-0UT 1
Aci nowlfffge the al armt InvestJ_qtte the al arma l
Report the temperature indications for the jacket water in and out of the diesel on the Doric trendicator.
These alarms may be caused by a malfunction of the jacket water keep-warm pump or possibly a malfunctioning ~
JW keepwarm heater or thermostat. The keep-warm pump should not be operating while the diesel is running.
Check that the JW keepwarm heater and pump are operating, and that their MCC breakers are not tripped.
Tale corrective action.
Nottfy the control roum operator as temperature dreps to 140 degrees F.
Assist the operator in starting and ranning the DG to cy-le the temperature between 140 and 170 degrees F. untti lepairs are made.
(na the activity.
s.
J - DGl A HI TEMP JACKET WATER-IN (175 degrees F. )
C04 - DGlA HI TEMP JACKET WATER-OUT (190 degrees F.)
i As the NBCW flows. it removes heat from tne Jac6et water.
The Jacket water removes heat from the lube oil at the luce all hea*. exchanger.
If the NSCW C-2
- - ~ '
~ '~ ~
'~
e NL-lU-ll:05-00-C-002: Respond to Diesel Ganorator Water Jacket Alarms or jaciet water temperatures are elevated. the tube oil ;emperatures may a)So be higher than Aprmal.
@ ncaledce tbt, alarm.
In <est t aate. the al are.
Verify the high temparature conditiona ext:lt. And monitor the Jacket water cooler inlet. JW IN and Ji> OUT. temperatures on the engine control panel, la6e corrective _acti?Dt The control room operator will trip the diesel generator prior to its JW temoerature (in or out) reaching 200 degrees F.
Lod the activ11yx C05 - DG1A TRIP Hi TEMP JACKET WATER Actnewledae the alarm.
The CO3 - DG1A HI TEMP JACLET WATER-IN and C04 - DGlA HI TEMP JACLET WATER-0UT will probably annunciate prior to the diesel trip.
The DGlA Hi TEMP JACVET WATER-IN and DGIA HI TEMP JACLET WATER-0UT alarms should have been actnowledged before acknowledging the DGlA TRIP HI TEMP JACKET WATER-alarm.
Invest 12 ate the alarm.
Inspect the items listed in the Probable Cause section of the sub procedure, and report the local Jacket water and NSCW temperature indicatiens at the Jacket water heat exchanger.
1.
Verify that the diesel generator has tripped and has come to a stoo.
NOTE: This diesel engine trip is an " emergency auto stop," and the engine cannot be restarted until af ter a tirner (approximately 90-seconde.) has timed out, the jacket water temperature sensors detect less than 200_ F, and you have depressed the EMER TRIP reset push button.
2.
Verify that the red emergency trip stop light is illuminated on the engine control panel.
!..a.Keport all illuminated annunctators to the control room operator.
4 The control room operator will direct.ou (using Procedure 17035-1 or 17038-1) in finding the exact cause :i the trip. Checks to make include
- a. Standpipe level--ts it low'
- b. Engine driven JW pump--check fer
.+4.
- c. Three-way mixing valve--if stuc,
. : a g 5. 45CW temperatures in and out (JW cooler) will be appro.1 siv.
en a;. and JW temepratures 2-!
NL-1U-ll:0!-00-C-002: Respond to Diesel Generator Water Jacket Alarms to and from the cooler will both be high.
- d. Look for leaks.
5.
Report findings to the control room operator.
Tele corretLive action.
1.
Eerform any corrective actions as directed by the control room operator.
2.
Depress the EMER TRIP reset pushbutton (when directed) and verify that the red emergency stop light extinguishes.
O.
The diesel generator can now be restarted, if desired.
Leo the activity.
C06 - DGiA LOW FRESS JACFET WATER C07 - DGl4 TRIP LOW FRESS JACLET W4TER C08 - DGIA LOW LEVEL JACLET WATER The DG LOW FRESS JACKET WATER alarm occurs at 8 psig, oecreasing.
The DG TRIP LOW FRESS JACLET WATER alarm occurs at 6 psig, decreasing. These alarms would occur if the diesel generator were running, and the following occurredt 1.
Malfunction of the engine-driven jscket water pump 2.
Leak in the jacket water system 3.
Low level in the jacket water standoipe 4.
Jacket water pressure switch for the alarm malfunctioned Acknowledae the alarms Investi_ gate the alarm.
The alarms will occur at both the engine control panel and at the control room annunciator panel. Upon receipt of the LOW PRESS JACKET WATER alarm and a directive from the CRO:
1.
Check the pressure at the gauge on the engine control panel.
It should agree approximately with the alarm setpoint.
2.
Check the Jacket water pump gauge at the front of the diesel engine.
This indicates discharge pressure of the Jacket water pump.
Do not
If the inoicator is reading less than 10 psid, or is fluctuatingi, inform the control room operator immediately.
O.
Check the standpipe level for an ano cation of loss of level, and check for jacket water leaks.
The DG 1A LOW LEVEL JACKET WATER alarm will occur if the level has droopec to its setpoint.
A leak leading to a loss of water will result in the Jaciet water pump losing suction and the alarm occurring. Any leak tnat causes the alarm to annunciate 2-4
{
a
NL-TU-ti 0!-00-C-002: Reepond to Diesel Generator Water Jac6 et Alarms l
l Should be very visible.
If N5CW temperature to and f rom the JW cocler are at about the, same temperature, this can Indicate that the JW three-way thermostatic bypass valve han stuck in bypass.
12Lt. c or r ec t i ve ac t i on.
Cer rect any problem with the system. This will primarily involve adding ceminerali:ed water to the standpipe.
kE2__t h' 8CtivitV.
Upon receipt cf the DG 'IRIP LOW FRESS JACFE1 WATER alarms Mi newledae the alarm._
ljltttit i c at e t he al arm.
1.
If the diesel generator had been started under conditions cther than an emergency start, verify that the diesel generator tripped and snutdown.
Had the start been an smergency start (indicated by the safety injection actuation signal), or a manual emergency start, the green " safety injection signal" light would have been lit and the red
" shutdown system active" light would have been e.ttinguished.
On a normal start, the green " safety injection signal" light would have been extinguished and the red " shutdown system active" light would be lit.
NOTE: Had the diesel generator tripped due to low Jacket water pressure. and had been started under non-emergency start conditions, it is possible for, it to restart immediately with an emergency start, or after 90 seconds with a normal start.
If the diesel generator has started by an emergency start (SIAS or manual), the annunciator will come in, and the diesel engine will continue to run.
If the diesel generator is still running (had been started by an emergency start):
Verif y that a low pressure condition actually exists by observing a.
the Jacket water pressure gauge at the engine control panel.
b.
Check the discharge pressure of the Jacket water pump by observing the Jacket water pressure gauge at the front of the i.
diesel generator.
After the trip, it should read zero, and the jactet water keepwarm pumo will be running.
Check the standpipe level f or an indication of loss of level, and c.
check for Jacket water leals.
A significant leak will result in I
this annunciator coming on when its setpoint is reached. Examine the engine-driven JW pump to eodence of failure.
l Tate correqLive action.
- -5
NL-lu-11:0?-00-C-00:1 Respond to Ososol Centrator Water Jac6et Alarms Coordinate closely with the control room operator.
If operational and technical specification conditions warrant, the control room operator may issue a directive to trip the diesel generator per Frocedure 13145-1, either by emergency stopping or by shutting down the diesel generator per the procedure.
(c1 t he ac t i vi.11,.
Upon receipt of the DG LOW LEVEL JACFET WATER alarms Aci ngwledne the al arm.,
investicale the alarm, 1.
Vertf r that a low level ext sts.
Observe the level gauge on the standpipe (1-1.I-19100 for lA diesel generator) and tne wide-range level instrument LI-5741.
}ake C,orrective action g 1.
Fill the standptpe to normal level.
2.
Instruct an assistant DAO (dispatched by the CRO) to monitor the standpipe level on 1-LI-19100.
NOTE:
The indicated level on the narrow range level indicator changes quickly once the valves are opened.
The normal levol is marked on the level indicator.
Ensure that it is not full prior to opening the valves.
3.
Report the standpipe level to the control room.
4 Open the 1-2403-U4-753 valve from the Demineralized Water System.
5.
Open the jacket water fill and makeup val've.
6.
Close the Jacket water fill and maleup valve when the assistant 0A0 irdicates that the indicator shows the normal level has been reached.
7.
Close the 1-2403-U4-753 valve from the DEMIN Water System.
B.
Reset the DG low level Jacket water alarm.
9 Irivestigate the Jacket Water System for leaks, and notify the control
. room of their location.
The CR0 may also tasue a directive to check drain valves for leaxc. Use Plant Vogtle Procedure 11145-1 for a listing of diesel generator valves, 10.' Monitor level after filling for indications of a leak, and check paping for leais.
CAUTION: Jacket water may contain "a:arcous chemiccis.
Loa the activstv.
2-c
NL-1U-11;Q3-00-C-002: Respond te Diesel Generator Water Jac6et Alarms 4
FERFORMANCE GUIDE Follow these stepe to investigate a diesel generator alarm associated with the Jacbet Water System.
1.
Acinowledge the alarm.
2.
Insestigate the alarm.
7.
Tal e corrective action.
4.
Log the, activity.
M L
s.
t i
2-7 s -
l r
NL-!U-11203-00-C-oMg Respond to Diosal Generator Water Jacket Alarms 1
I h
SELF-TESI 1
hefore proceeding to the Task Fractice, answer the f ollowing questions.
l 1.
What are the two main circuits in tne Jacket Water System?
2.
When the diesel engine is running, and the DG LOW TEMP JAttEt WATER IN annunciator or the DG LOW TEMP JACLET WATER OUT annunciator alarms, the,sacket water keep-warm pump will automatically start, and the eier:tric heater will energt re.
a.
True b.
False 0.
State two diesel generator trips associated with the Jacket water Gystem, and give setpoints. SpeCify which would trip the diesel even if it had been started with an emergency start.
i I
t-(
l L
i a
2 f
2-B_
..... 2
_-._..-._,,-_a_
i NL-lU+11000-00-C-002: Respond to Diesel Generator Water Jacket Alarms i
i AN5WE61 1.
The iceo-warm circuit and the engine-drivren J.cLet water cump.
2.
False. The Jacket water 'reep-warm pump and heater only coerate when the diesel engine is of f.
DG TRIP HIGH TEMP JACKET WATER.
Occurs when 2/3 engine outlet water I
cetectors detect 200 degreen F. and will trip the diesel generator had l
tt been emergency started, t
DO TRIP LOW FRESS JACKET WATER. Occurs at 6 ost g.iac6 et water pressure, and will trip the diesel generator only after it had been normally started.
r s
S l
l r
t I
S Y
l.
i s
-9
_-.,_,.____-..u_
- 1
-.,__...,._.__._.a,-_..
IlL-!U-11:0!-00-C-00:1 Respond to Diesel Generator Water Jacket Alarms TASM FRACTICE ire proceeding" to the Perf ormance Test. complete the f ollowing last
<;tice exercise (s).
1.
Review Frocedur es 17030 and 13145.
Be sure that you understand all precautions, limitations, and steps associated with responding to a diesel generator Jac6et Water System alarm.
2.
Tate this Instructional unit and Frocedures 17038 and 13145 to the an' diesel generator building.
Be sure that you can locate all local components and instrumentation associated with responding to a diesel generator Jacket' Water System alarm.
3.
In the diesel genertor building. walk through the task of responoing to a diesel generator Jacket Water System alarm.
If'possible, have a
=
f ellow trainee evaluate your perf ormance using Procedures 170!B and 10145 and this instructional unit.
4 4,
2-kh
NL-IU-11203-00 C-002: Respond to Diesel Gene-at.or sater Jac6 et Alarms e
fEEDEACr CN TA5V FRACT,JflE 1.
If you have any quesiions about the precau.mns. I1mitatiens, or steos d
in Procedures 170 9 and 13145, ask your instructor.
rou snould have been able to locate all local conoonents ano instrurrentatten associated with responding to a diesel generator Jacket Water System alarm.
If you had any dtificulty, est your instructo-der help.
~.
You snould nave walked througn the steps necessary to respond to a diesel gener ator Jacket Water System af. arm.
If you had any atfitculty, re-read the pertinent sect.ons 04 this instructional unit and the procedura.
Resolve any Questions with your instructor.
E i
4 6
2-11
_ _ _ _ - _ _ - _ - - -