ML19224B118
| ML19224B118 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/04/1978 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| 2203-1.4, TM-0039, TM-39, NUDOCS 7906140066 | |
| Download: ML19224B118 (10) | |
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DOCUMENT NO:
COPY MADE ON 8
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METROPOLITAN EDISON COMPMiY.
Wilda R. Mullinix,.NRC N
5 7906140066 188 050
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.CEURAL rile 5'#f47 ""j *'l THREE MILE ISLAND NUCLEAR STATION UNIT #2 ABNGRIML PROCEDURE 2203-1.4 RCP & MOTOR EMERGENCIES Table of Effective Pages Pace Date Revision Pace Date Revision Pace Date R evision 1.0 05/17/77 0
2.0 05/04/78 3
3.0 05/04/78 3
3.1 05/04/78 3
4.0 06/18/77 1
5.0 06/18/77 1
6.0 06/18/77 1
7.0 05/17/77 0
8.0 05/17/77 0
Unit i Staff Facemmends Approval Unit 2 Staff Recommends Approval b/
Approval Date Approval Date Cc;ninnt De;:t. Head Cognizant Dept. Head Unit 1 PORC Recommends Approval Unit 2 P RC Recommends Approval 2 !7[
Da te L-C ate Chairman of PORC g/.,dti/m,5 of PO R C
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Unit 1 Superintendent Approval Unit 2 Superi tendeo' Approval
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Date
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Manager Generation Quality Assurance Approval A'/
Date
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y APR 2 3 1979 2203-1.4 Revision 0 05/17/77 THREE MILE ISLAND NUCLEAR STATION UNIT #2 ABNORMAL PROCEDURE 2203-1.4 RCP & MOTOR EMERGENCIES Table of Contents SECTION PAGE 3
1.0 LOSS OF SEAL INJECTION TO PUMP 2.0 2.0 SEAL FAILURE 4.0 3.0 PUMo AND MOTOR VIBRATION 5.0 4.0 REVERSE ROTATION 6.0 5.0 LUBE OIL EMERGENCY 6.0 6.0 DROPPED IMPELLER 8.0 i
1.0 188 052
NAPR 2 31979:,
2203-1.4 3
Revision 3 05/04/78 THREE MILE ISLAND NUCLEAR STATION UNIT #2 ABNORMAL PROCEDURE 2203-1.4 RCP & MOTOR DiERGENCIES 1.0 LOSSOFSEALINJECTIONTdPUMPS 1.1 Symptoms
1.1.1 ALARM
" Reactor Coolant Pump Loop Seal Inject Flowlow" (8:B.27).
1.1.2 ALARM
" Reactor Coolant Pump Total Injection Loop Flow /Hi/Lo" (8:A.27).
' l.3 Seal Inlet Flow (individual) decreasing (panel 3).
1.1.4 RC Pump Tot:1 Seal Inlet Flow decreasing (panel 3).
1.2 Immediate Action 1.2.1 Automatic Act1on a.
None 1.2.2 Manual Action (Loss of Injection).
a.
If sell injection f'ow to operating pumps is lost, the ptrps may cor.tinue creration provided intermediate cooling sater flow is mainta.ned and seal temperatures remain within the following limits.
T) <185 F U
T2 <170 F T
c 4 <185 p If seal injection flow to idle reactor coolant pumps is lost the associated seal return isolation valve (MU-V33 A,B,C or D) must be closed within one minute to 3:
prevent seal damage.
b.
During loss of injection, monitor seal bleedoff temperature Pump Bearing Outlet temperature, seal bleedoff flow, and 188 053 2.0 e
2203-1.4 UR23 g6 ;
Revision 3 0S/04/78 seal leakage flow carefully.
If seal leakage plus seal returns exceeds 1.9 gpm, trip the pump, cooldown, and inspect the seals.
Close the injection flow control valve (MU-V32) to prevent c.
high injection flow upon recovery of injection.
The seal bleedoff flow control valves (MU-V33 A, 8, C, D) d.
should remain open as long as the motors remain energized.
Follow Up Action (Recovery of Injection) 1.2.3 When injection fluid is availaib, reestablish injection a.
flow as follows:
S'owly open the injection flow control valve (MU-1.
Continue V32) to establish a flow of 2 gpm per pump.
at this flow rate for a period of 2 minutes.
Increase injection flow to 5 gpm per pump for a 2 2.
minute period.
If seal return valves, MU-V33 A, B, C, or D has 3.
closed, reopen them at this time.
Increase injection flow to normal flow of about 10 4.
gpm per pump.
1.3 F:llow Up Action In the event the pump must be shutdown during a loss of 1.3.1 injection mode, the following steps should be taken:
The pump should not be shutdown when injection flow NOTE:
is lost unless it is absolutely necessary.
Reduce power to within RPS limits.
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a.
The appropriate seal return isolation b.
Trip the RCP.
valve (MUV33 A, B, C or D) must be closed within one 188 054 3.0
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hbb b
2203-1.4 APR 2 3 En? 5 Revision 3 05/04/78 minute af ter pump shutdown.
Shutdown Oil Lift System at zero speed.
c.
Continue flow of intermediate cooling water at normal ficw until Reactor Coolant Systen temperature is less U
than 200 F and pressure is below 200 psig.
d.
Do not restart pump until injection flow is available.
Reccver injection flow per section 1.2.s above.
U If RCP seal temperatures T) or T have exceeded 185 F, or e.
4 if seal leakage plus seal return exceeds 1.9 gpm, do act restart the pump.
Cooldown and inspect the seals for damage.
2.0 SEAL FAILURE 2.1 Symptoms i
2.1.1 Abnormal Pump Seal Cavity Pressure
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2.1.2 Excessive Pump vibration 7
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APR 2 3 7373 2203-1.4 Revision 1 06/18/77
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2.2 Immediate Action.
2.2.1 Automatic Action.
a.
None.
2,2.2 Manual Action.
a.
The affected RCP must be tripped if the seal cavity
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pressures exceed 2500 psig.
b.
If the sum of seal bleedoff ficw and seal leakoff flow exceeds 3.0 gpm - TRIP THE RCP.
Follow Up Action 4...l.a Datemine degree of sefl failure as follows:
a.1 Failure of No. I seal is indicated by Pump Seal Cavity pressure between seal 1 and 2 at aoproximately system pressure.
a.2 Failure of No. 2 seal is indicated by Pump Seal Cavity pressure between seal 2 & 3 at approximatel" b system pressure.
a.3 Failure of No. 3 seal is indicated by Pump Seal Cavity pressure between seal 2 & 3 at approximately 50 psia.
a,4 Failure of No. I and No. 2 seals is indicated by Pump Seal Cavity pressure between seal 1 & 2 and 2 & 3 at approximately system pressure.
a.5 Failure of No.2 and No. 3 seals is indicated by Pump Seal Cavity pressure between sec1 1 & 2 at approximatley 50 psig.
a.6 Failure of No. I and No. 3 seals is indicated by pump seal cavity pressure between seal #1 and 2 at approximatley system pressure, and pressure between seal #2 and 3 at approximately 50 psig.
4.0 188 056 2
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y 2203-1.4 MR 2 3 m.
Revision 1 06/18/77 NOTE:
All values are approximate.
Destaging may cause only partial AP cross a seal.
2.3.2 If two seals are leaking, the pump may be operated, however, a planned unit shutdown should be scheduled.
i 2.3.3 In the event the pump must be shutdown, the following steps s
should be taken:
a.
Reduce power to within RPS limits.
b.
Trip the RCP.
When pump reaches zero speed, lift Pump and Back Stop c.
Fumps should be stopped.
d.
Continue flow of Cooling Water and Seal Injection until RC System Pressure is below 200 psig, and temperature is below 200 F.
Do net attempt to restart pump until seal orablem has e.
been fixed.
3.0 PUMP AND MOTOR VIBRATION 3.1 Symptcms 3.1.'
Excessive shaft vibration on IRD System greater than 30 mils for first fcur hours of one pump per loop operation.
Greater than 26 mils for one or two pump per loop operation.
3.2 Immediate Action.
3.2.1 Automatic Action a.
None.
3.2.2
, Manual Action.
7i Reset shaft vibration alarm on IRD System Panel 10.
a.
b.
If vibration alams reoccur immediately, reduce power to within RPS limits and trip affected RCP per nomal procedure.
S' 188 057 5
Sg g
APR 2 3 29 2203-1.4 Revision 1 06/18/77 3.3 Follow Up Action.
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3.3.1 Detemine cause and repair.
4.0 REVERSE ROTATION 4.1 Symptoms.
4.1.1 Excessive vibration due to a backstop failure.
s 4.2 Ir:rnediate Action.
4.2.1 Automatic Action, a.
None.
- 4. '. 2 Manual Action.
Start oil lift system on affected pump.
a.
b.
Commence a nomal plant shutdown and cooldown of the R.C.S. per 2101-3.2.
4.3 Follow Up Action.
4.3.1 Detemine cause and repair.
5.0 LUBE OIL EMERGENCY 5.1 Symptom.
5.1.1 Low i!ft pump discharge oil pressure alam (1800 PSIG) on computer.
i 1
6.0 188 058
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2203-1.4 A R 2 3 G73 Revision 0 05/17/77 5.1.2 High bearing temp. alarms Radial 185 F, 8.831, Thrust 200 F U
8.E31 for Upthrust temp Hi and F31 for downthrust temp Hi.
5.1.3 Hi/Lo Levels alarms on upper and lower oil pots annunciated on ccmputer.
Upper Oil Pot - Hi 12.2 INC.
Lo 8.2 DEC.
Lower Oil Pot - Hi 13.8 INC.
Lo 9.8 DEC.
5.1.4 RCP lube oil flow Lo. (7.0 gpm on ccmputer).
5.1.5 RCP Backstop oil flow low.
(0.24 gpm on ccmputer).
5.2 Imnediate Action.
5.2.1 Automatic Action 5.2.2 Manual Action.
Start D.C. oil lift pump.
a.
b.
In the event of high motor bearing temps, (Radial >185,
thrust >200 F), reduce reactor power to 75% and trip affected pump.
5.3 Follow Up Action 5.3.1 If icw exists on lift and/or backstop system, start lift and/or backstop pumps on affected RCp.
5.3.2 If Hi/Lo levels exist in oil pots, reduce reactor power to 75%
and secure affected pump.
5.3.3 A possibility of oil fire exists if the oil systems have ruptured.
To prevent oil fire, the unit will be shutdown and I
0 cooled down to 50 F below the Flash point of the oil used in the system.
The flash point of the oil is 450 F.
U 7.0 188 OuS9 e
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APR 2 3 E79 -
2203-1.4 Revision 0 05/17/77 5.3.4 Determine cause and repair.
6.0 PUMP MOTOR SEPARATION - OROPPED IMPELLER 6.1 Symptoms.
6.1.1 Low motor current.
6.1.2 Low R.C.S. flow.
6.1.3 Hi vibration:
z Motor stand Vibraswitch alanas.
a.
b.
Shaft - IRD System Panel 10.
6.2 Immediate Action.
6.2.1 Automatic Action, Possible reactor trip on power to flow.
a.
6.2.2 Manual Action, Reduce power and trip reactor.
a.
b.
Secure affected RCP.
Commence shutdown and cooldown of the RCS.
c.
6.3 Follow Up Action.
6.3.1 Determine cause and repair.
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