ML20092G079
| ML20092G079 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 12/08/1989 |
| From: | Fitzwater L GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-050-90, CON-IIT5-50-90, RTR-NUREG-1410 LO-LP-11105-08, LO-LP-11105-8, NUDOCS 9202190621 | |
| Download: ML20092G079 (17) | |
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GEORGIA POWER POWER GENERATION DEPARTMENT YOGTLE ELECTRIC GENERATING PLANT TRAINING LESSON PLAH r --
TITLE:
EMEPGENCY DIESEL GENERATOR AUXILIARIES NUMBER:
LO-LP-11105-08-C JACKET WATER COOLING $YSTEM PROGRAMt LICENSED OPERATOR REVISION:
8 SME.
C.
BREWER DATE:
12/6/89 APPROVED:
DATE:
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INSTRUCTOR GUIDELINES:
1.
LESSON FORMAT A.
Lecture with Visuni Aide II.
MATERIALS A.
Lesson Plan B.
Transparencies and overhead Projector C.
Dry Erase Board and Markers III.
LVALUATION
.A.
Oral or written exam in conjunction with other lesson plans IV.
REMARKS A.
Performance-based instructional units (IUs) are attached to the lesson plan as student handouts.
After the lecture on Emergency Diesel Generator Auxiliaries Jacket Water Cooling system, the student should be given adequate self-study time for the IUs.
The instructor should direct self-study activities and be available to answer questions that may arise concerning the IU material.
After self-study, the student will perform, simulate, observe, or discuss (as identified on the cluster signoff criteria list) the task covered in the instructional unit in the presence of an evaluator.
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LO CL 11 05 LICENSED OPERATOR OBJECTIVES Lo.Lp.1110$.C I
PUP,K'5E STATEMENT Following completion of this lesson, the student will possess those knowledges systematically identified for the of the DE AUX - JACKET WATER COOLING SYSTEM tasks, performance II LIST OF OBJECTIVES 1.
Describe the general flowpath through the Jacket Vater Cooling System during standby and engine runnin6 Operations.
(KSA numbers: 064000K102) 2.
Determine the power supplies for the jacket water keepwarm pump and heater.
3.
Describe the permissives associated with the jacket watet keepwarm pump and heater.
4.
Identify the diesel generator trips associated with the Jacket Water System.
(KSA numbers: 064000K402) 5.
With th6 diesel engine running and loaded, predict the most probable results of the following conditions:
Thermostotic control valve stuck in the bypass position a.
- b. Therrostatic control valve stuck open
- c. Loss of NSCW to jacket water cooler
- d. Failura of engine driven Jacket water pump (KSA numbers: 064000A201) 6.
Explain the term " Interdependency of Safeguards Systems Components."
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1 Licensed operator Objectives for this lesson plan can be found in the Licensed operator system Master Plan Section 2.3 (Qualification signoff criteria)
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REFERENCES:
1.
Plant Vogtle Procedures:
11146
" Diesel Generator" 13146
" Diesel Generator Fuel Oil Transfer System" 14980
- Diosci Generator Operability Test" 13427 "4160 VAC IE Electrical Distribution System" 17035 Ansiunciator Response Procedures 17038 A1nunciator Responso Procedures 2.
Technical Specificationst 3.0.1 Electrical Power Systems, AC sources 3.
" standby (Emergency) Diesel Generator," Vogtle Training Text Chapter 16C 4
Plant Manual Chapter 23 5.
P&TDs, Logica and other Drawings Piping and Instrument Diagrams IX4DB170-1 1X4DB170-2 Vendor Drawings AX4AK01-27 (Lube 011)
AX4AK01-26 (Jacket Water)
AX4AK01-29 (Starting Air)
AX4AK01-28 (Fuel 011)
Control Logic Diagrams:
1X5DN107-1 (DC Fuel Oil fystem)
IX5DH107-2 (DG dnit Engine) 1X5DN107-3 (Generator)
Elementary Diagrams IX3D-BH-003C 1X3D-BN-003D 1X3D-BH-003B IX3D-BH-G03F IX3D-BH-0030 1X3D-BH-003H IX3D-BH-c03I 1X3D-BH-G03J One Line Diagrama 1X3D-AA-A01A l
4
l LO-LP-11105-08-C RETERENCES I l
i 1X3D-AA-K01A 6.
hendorManuale AX4AK01-509 AX4AK01-510 AX4AK01-563 7.
FSAR:
8.3, 9.5.4, 9.5.5, 9.5.6, 9.5.7, 9.5.8 8.
CAP Comm t.t rnente t SER 84.042
" System interdependency oversights results in loss of redundant safeguards functions" 9.
Instructions 1 Units:
LO-IU-11105-C-001 Respond to Jacket Water System Alarms 10.
Transparencies:
LO-TP-11105-001 Lesson objectives LO-TP-11105-002 Jacket Water System 5
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LESSON OUTLINE:
NOTES I.
INTRODUCTION A.
Overview 1.
This lesson describes the relationship of the Jacket Water Cooling Systems, both the main, engine-driven system, and the keep-warm system, and how they perform their functions of controlling engine temperature.
2.
Preeent the Objectives LO-TP-11105-001 B.
This lesson will be presented in the following Write on board sequence:
1.
General Overview a.
Functions b.
Flowpathe 2.
Component Description 3.
Controls 4.
Instrumentation and Alarms 5.
Operations 6.
System Interfaces 7.
Summary II. LESSON PRESENTATION A.
General Overview 1.
The Jacket Water Cooling System provides enough engine cooling to allow continuous engine i
operation at maximum load 2.
Provides engine warming when shut down, to l
promote starting 3.
Flowpaths objective 1 a.
Jacket Water Standpipe LO-TP-11105-002
Absorbe pump pressure variations
LO-LP-ll205-08-c III.
LESSON OUTLINE:
HOTES
- 3) Absorbs volumetric changes due to temperature variation b.
JW fill and makeup i
1)
From demineralized water system c.
Engine driven JW pump
- 1) Located at engine front 2)
Driven from engine gearset 3)
Single-stage, centrifugal d.
Thermostatic bypass control valve
- 1) Located just above JW cooler
- 2) Modulates to maintain JW temp. by bypassing cooler, or passing flow through it 3)
Receives 1000 gpm from JW pump a)
Flow through the heat exchanger shell side is limited to 750 gpm l
by the thermostatic bypass control valve i
b) The remainder of the flow passes
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around the heat exchanger e.
Jacket Water Cooler
- 1) JW shell side
- 2) HSCW tube side
- 3) JW flow through cooler depends on thermostatic control valve
- 4) NSCW continuous (normally) f.
Lube oil cooler tube side to remove heat from lube oil g.
Engine Components 1) 2 main headers a)
Supply between engine " Vee" 7
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LO-LP-1110$-08-C i
III.
LESSON OUTLINE:
NOTES b) Distribute water to dackets around cylinders c)
Reu. oves internal engine heat d)
Exits engine at exhavet jackets in heads 2) 1 supply to governor cooler to remove s
heat from governor oil 3) 2 turbochargets i
- 4) Air coolers-(turbocharger intercoolers)
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Return from engine to standpipe 1.
Jacket water keep-warm heater
- 1) Thermostatically controlled by standpipe temp.
- 2) Maintains JW temp. when engine is not running
- j. Jacket water keep-warm pump.
I
- 1) Runs when engine is off
- 2) Circulates heated water through engine-components when engine is off H.
Component Description 1.
Jacket Water Pump a.
single stage, centrifugal, engine driven l
Pump b.
Circulates jacket water through the DG coolant loop during Do operation c.
Capacity - 1800 gpm 2.
Jacket Water Cooler
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a.
Shell & tube heat exchanger b.
Cooled by NSCW i
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LESSON OUTLINE:
NOTES c.
Located on right hand side of DR (if facing flywheel) 3.
Thermostatic control valve a.
Three way valve controlling the temperature i
of the cooling water system.
(Internal Temp. Sensing device)
- 1) HX bypassed below 152 F
- 2) HX full flow above 170 F 4.
Turbocharger After coolers a.
Cools combustion air after it has passed thru the turbocharger (increases density for better engine performance) b.
Air-to-water finned tube HX: two per engine 5.
Lube oil cooler a.
Shell and tube HX cools engine lube oil during operation b.
Approx. 1/2 water flow thru tubes (900 gpm) 6.
Jacket Water Standpipe a.
Surge tank providing NPSH for jacket water pump
- 1) Provides makeup water I
- 2) Absorbs pump pressure variations
- 3) Absorbe volumetric changes due to temperature variations j
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b.
Vertical, cylindrical tank l
- 1) Vented to atmosphere
- 2) Makeup supplied from domin water c.
Operating Statistics (FSAR-Q430.25)-
1)
Normal operating level - 12" from top
- allowance for thermal expansion
- 2) Low level alarm - 37" from top 9
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LESSON OUTLINE:
NOTES ensures no air pockets formed by returning jacket water 3)
Expected system leakage less than 10 gallons per day.
(FSAR-Q430.27) d.
Instrumentation includes gauge glass and remote level indication and alarms 3
7.
Jacket Water Keep Warm components Consists of 3 HP, centrifugal pump and a 75 a.
KW inmersion heater i
1)
Pump power - (1NBI, INBO)
Obj6ctive 2
- 2) Heater power - (1NBI, 1NBO)
- 3) Heater installed in standpipe b.
Pump runs continuously when diesel shutdown and heaters operate to gaintain water temperature approx. 150 F c.
Pump auto stops when engine starte d.
Pump must be running for heater to energize l
l C.
Controle l
1.
JW Keep Warm Pump objective _3 a.
START-AUTO-STOP switch on 1NBI/1NDO b.
Auto stop on engine start and run Auto start when engine is not' running c.
2.
JW Kerg Wars Heater a.
AUTO /OFF switch on 1NBI/1NBO b.
Heater energites if in AUTO, and
- 1) JW keep warm pump running, and
- 2) Thermostat detects low temperature 3.
Heater Thtunostat a.
Senses standpipe temperature 10 l....
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III.
LESSON OUTLINE:
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NOTES b.
Set for 150 F I
4.
Diesel Generator Trips (Engine Protection) a.
Jacket Water High Temperature objective 4 1) 2/3 coincidence, 200 F
- 2) unter returning from engine
)
i 3)
Emergancy trip providing protection.in all modes, (emerg. and normal starts)
- 4) Pneumatic Engir.e Protection Controls
- 5) HI JW temp sensor malfunction if 1/3 sensors made up b.
Low Press Jacket Water Trip 3
- 1) 6 pai, 1/1 sensor
- 2) Bypassed on emergency start, but will alarm only 3)
If trip o: curs af ter normal start, it remains in effect 90 seconds.
Possible to normal restart after red
" stopping" light goes out.
Emeroency restart would restart engine immediately
+
D.
Instrumentation and Alarms 1.
Panel at engine skidfront a.
JW pressure, KW pump in or out
- 1) Possible to measure disch pressure or suction pressure
-2) 15 to 25 psig expected From rounds sheet 11882 l b.
JW pressure, engine pump in or out
- 1) Possible to measure suction or I
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2.
Other Associated Engine Instruments a.
JW temperature indicators at JW and LO coolers 11 s'r-rd
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LO-LP-11105-08-c III.
LESSON OUTLINE:
NOTES b.
NSCW temp IN/OUT of JW cooler c.
NSCW flow-indicating transmitters
- 2) 0 - 100% range 3.
Indications on Engine control Panel PDG 2/4 I
a.
Tailset water pressure gauge b.
" DORIC TRENDICATOR" thermocouple readout JW IN (to engine), TC21 JW OUT (from engine), TC22 4.
Annunciator Alarms (both PDG 2/PDG 4 and QEAB) a.
Low temp jacket water - IN - 140 F b.
Low temp jacket water - OUT - 140 F c.
Hi temp jacket water - IN - 175*F 4
d.
Hi temp jacket water - OUT - 190 F 0
e.
Trip - Hi temp jacket water - 200 F f.
Low press jacket water - 8 psi i
g.
Trip - low prens jacket water - 6 poi h.
Low level jacket water:
4" below c/L of JW ret. hdr.
i.
Hi jacket water temp sensor malf. - N/A
- j. Switch not in AUTO - KW pump or htr.
Other non-jacket switch off l
water system switches also E.
System Operation 1.
Standty conditions Keep warm system operates continuously to a.
maintain the unit at optimum temperature l
to ensure quick starting and fast loading l
b.
System automatically deenergizes when t
diesel starts 42 l
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LO-LP-11105-08-c i
III.
LESSON OUTLINE:
110TES l
2.
Operating Conditions I
e Jacket water temperature regulated by 3-way 4.
thermostatic control valve, TCV-19097
- 1) Haintained SS at approximately 146.6 F (1800 gpm) 150 peig
- 2) NSCW outlet temp. 133"F at 150 psig -
j (1200-1500 gpm) i b.
Active components include:
- 1) Jacket water pump a)
Failure indicated by low pressure alarm b)
Failure requires engine shutdown 2)
Keep warm circulating water pump a)
Failure indicated by - jacket water low temperature alarm =
0 140 F b)
Large mass of DE retains heat-p 3) 3-Way Thermostatic Valve (TcV-19096, These valves have 19097) manual stops to limit flow to 0
a) Below'152 F, JW-flow fully'
< 750 gpm (flow bypasses cooler limiters) through shell side of-HX
- b)- Above 170 F, up to 750'gpa JW flow passes through cooler 3.
DE cooling water system components are sized to (FSAR-Q430.2'3) allow sufficient cooling at 100% rated load-with warmest expected air temperature I
4.
Possible Casualtiesi Detection and Results objective 5.
a.
Thermostatic control valve stuck in bypass position l
l
- 1) High temperature "JW-0UT" alarm
- 2) High temperature "JW-IN" alara 3)
IRIE high temperature JW 13 l
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LESSON OUTLINE:
NOTES
- 4) Locs of DO - Engine could not be restarted until emergency trip has been reset b.
Theirmostatic control "alve stuck in the open (full flow through cooler) position 1)
Low temperature"JWaIN" alare
- 2) Low temperature *'JW-OUT" alarm
- 3) tio degradation; already running c.
Loss of NfCW to JW cooler
-Commitment-SER 84.042 (in part)
- 1) EDo is inoperable
- 2) Engine could start and run approx. 3 minutes in this condition by one HI JW temp. trip
- 3) Hi JW in & out alarms are probable first indications d.
Failure of engine driven jacket-water pump
- 1) Engine trips on low jacket water pressure (6psig) a)
trip active 90 serrr.de after normal start b)
Low preso,
,g, ;; a poig 2)
If Do was emisp,ncy.:. art.G; crips on 2/3 jacket w ter hip te O vature, 200,F 3)
High temp JW-IN alart
- 4) High temp JW-OUT alarm 5)
Possible low level jacket water alarm l
- depending on f ailure mode of pump (leak) 5.
" Loss of Interdependency of safeguards Systems objective 6 l
Components" Start SER 84.042 l
14
LO-LP-11105-08-C III.
LESSON OUTLINE:
NOTES Failure to recognize interdependency of a.
safeguards systems components can risult in the loss of redundant safeguards trains b.
At Vogtle, being alert for alarms and tagged components should prevent many problems in this area, examplos 1)
"NSCW Train A (or B) DG Clr Lo Flow" on IA1 2)
" SEQ A (or B) safoty equip, failed to start" (ALB-36 or 37 on QEAB) indicates some equipment did not End SER 84.042 sequence af ter a load shed F.
System Interfaces 1.
Supporting JW System a.
Domineralized water system
- 1) Makeup standpipe level, for JW system losses b.
- 1) Removing heat via JW cooler
- 2) NSCW tube side l
- 3) JW (engine coolant) shell side III.
SUMMARY
A.
Review Lesson Objectives l
1.
DESCRIBE THE GENERAL FLOWPATH THROUGH THE EDO i
JACKET WATER COOLING SYSTEM DURING STANDBY AND ENGINE RUNNING OPERATIONS See Section II.A.3 2.
DETERMINE THE POWER SUPPLIES FOR THE JACKET WATER KEEP WARM PUMP AND HEATER l
1NBI/1NBO 3.
DESCRIBE THE PERMISSIVES ASSOCIATED WITH THE JACKET WATER KEEP WARM PUMP AND HEATER See Section II.C.1 and 2 15
1 LO-LP-11105-08-C III.
LESSON OUTLINE 4 NOTES 4.
IDENTIFY THE DIESEL GENEPATOR TRIPS ASSOCI ATED WITH THE JACKET WATER SYSTEM 2/3 HLgh Temperature (200 F) - any time 1/I Low Pressure (6 peig) - bypassed on emergency start 5.
WITH THE DIESEL ENGINE RUNNING AND LOADED, PREDICT THE MOST PROBABLE RESULTS OF THE FOLLOWING CONDITION 5:
a.
THERMOSTATIC CONTROL VALVE STUCK IN THE BYPASS POSITION b.
THEP.MOSTATIC CONTROL VALVE STUCK OPEN c.
LOSS OF NSCW TO JACKET WATER COOLER d.
FAILURE OF ENGINE DRIVEN JACKET WATER PUMP See Section II.E.4 6.
EXPLAIN THE TERM " INTERDEPENDENCY OF SAFEGUARDS SYSTEMS COMPONENTS" See Section II.E.5 i
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