ML19224B306
| ML19224B306 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/25/1978 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| 2203-2.2-01, 2203-2.2-1, TM-0408, TM-408, NUDOCS 7906140453 | |
| Download: ML19224B306 (5) | |
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1 TMI DOCUMENTS d
DOCUMENT NO:
7
- i wa COEl MADE ON OF DOCUMENT PROVIDED BY METROPOLITAN EDISON COMPANY.
_//# W Wilda R. Mullinix, NRC 9
7906140453 e
199 001 e
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C0ffiRCfD CC?V E Uid 7 e
10/25/78
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,_E THREE MILE ISLAND NUCL2AR STATION UNIT #2 ABil0R.AL PROCEDURE 2203-2.2 TURLUIE TRIP Table of Effective Page.
Page Date Rwision Pace Date Revision Pace Date R evision 1.0 04/18/78 3
26.0 51.0 2.0 04/18/78 3
27.0 52.0 3.0 10/06/78 6
28.0 53.0 4.0 10/25/78 7
29.0 54.0 5.0 30.0 55.0 0.0 31.0 56.0 7.0 32.0 57.0 8.0 33.0 58.0 9.0 34.0 59.9 10.0 35.0 60.0 11.0 36.0 61.0 12.0 37.0 62.0 13.0 38.0 63.0 14.0 39.0 64.0 15.0 40.0 65.0 16.0 41.0 60.0 17.0 42.0 67.0
'il 18.0 43.0 68.0 19.0 44.0 69.0~
20.0 45.0 70.0 21.0 46.0 71.0 22.0 47.0 72.0 23.0 48.0 73.0 24.0 49.0 74.0 25.0 50.0 75.0 Unit 1 Staff Recommends Approval Unit 2 Staff Recommends Approval
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Date Approval
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Date Approval Ccgnizant Ocpt. Head C:gnizant Ocpt. Head Unit 1 PORC Recommends Approval Unit 2 FORC Rt: commends Approval I? f ! v ri % -
Date lbSI ?
I Date Chairman of P0RC 4 Chairman of PCRC
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Unit 1 Superintendent Approval Unit 2 Superintenden Approva!
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Date /6 F
Data
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Maneg:r Generation Quality Ar.suranco Approval
/['Th Date 199 002
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2203-2.2 Revision 3 04/18/78 THREE MILE ISLAND NUCLEAR STATION UNIT #2 ABNORMAL PROCEDURE 2203-2.2 TURBINE TRIP 1.0 SYMPTOMS 1.
ICS in the tracking mode.
Turbine throttle, intercept and reheat stop valves closed.
2.
Generator bre skers open and megawatts electric to zero.
3.
4.
Reactor power decreasing.
5.
Any one of the following cause a turbine trip:
a.
Gene ator trip b.
Rerctor trip P';th feed pumps tripped c.
Loss of all three Secondary Closed Cooling Water Pumps d.
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y' e.
Vacuum <l8 - 22" Hg f.
Loss of 2 of 3 TURBINE SPEED SIGNALS g.
Thrust bearing failure trip >75 - 80 psig pressure i.
Low bearing oil pressure trip <5-7 psig l
j.
EHC loss of D.C. power High vibration (greater than 14 mils. for IJ Sec.)
k.
Pressurizer level increasing above 240", steam pressure increasirg 6.
above 885 psig, and T avg. increasing above 58L F.
I E.0 IMMEDIATE ACTION J
A.
Automatic Action 1
1.
Turbine throttle, govenor, intercept and reheat stop t
valves c'ose an': Generator breakers open.
199 003 4
1 3
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2203-2.2 Revision 3 04/18/78 2.
Turbine bypass valves or atmospheric relief open to control 885 PSI header pressure.
3.
Pressurizer Power Operated Relief Valve open.
4.
ICS trips to track and run back at 20%/ min. or if the turbine trip is from loss of feedwater pump (s), the run back is 50%/ min. to 15% power.
5.
If both the main feed pumps have tripped, the steam drive, emergency feed pump & two motor driven emergency feed pumps will start.
6.
The feed demard will control 0.T.S.G. at minimur level (30").
7.
The Seal Oil Backup Pump, Bearing Oil Lift Pumps and Turning Gear Oil Pump will start as turbine speed dcccys.
8.
Extra'ction v'alves on all feeawater heaters close, and
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extraction line drain valves open.
B.
Manual Action 1.
Verify that the Turbine Stop Valves are closed, generator breakers and field breakers are open. Verify the start of the Seal Oil Backup Pump, the T'srning Gear Oil Pump, the Bearing Lift Pumps, and verify closed extraction steam valves:
3 Stage EXV 23 A/B and 22 A/B 8 Stage EXV 29 A/B 11 Stage EXV 6 A/B 10 Stage EXV 1 A/B 13 Stage EXV 16 A/B and 11 A/B 2.
If any feedwater stations are in hand, total feedwater should be reduced manually to that correspcnding to 15%
neutron power.
199 004 2.0
2203-2.2
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Revision 6 10/06/78 3.
If Diamond Power or Reactor Master is in hand, run rods in manually to 15% neutron power.
4.
If any of the fol:owing ICS stations are in Hand (SteLm Generator / Reactor Demano either Feedwater Demand, Main or Startup Feedwater Valve Demand, Feedpump Speed, Reactor Master, and/or Diamond) runback the appropriate ICS stations.
3.0 FOLLOW-UP ACTION
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1.
Monitor pressurizer level, R.C. pressure, R.C. temperature, OTSG level, and steam header pressure.
2.
Utilize pressurizer heaters and spray control R.C. pressure
@2155 PSIG and steam header pressure setpoint 0885 PSIG to U
control T avg. 0532 F.
Adjust makeup and letdown flows to 34 control pressurizer level 0240". Adjust feed flow to control
.-5 OTSG levels #30".
3.
If vacuum is lost in main condenser, verify atmospheric reliefs are controlling header pressure at 885 PSI aid reduce reactor power to zero.
(Hot Standby) Add required nakeup to makeup tank as T avg. is reduced to 532 F.
4 If turbine trip is due to loss of both feed pumps, verify emergency feed pumps started and are delivering water to the OTSG's.
Control EF-Vil A/B to maintain OTSG levels at 30".
5.
If Low Heater Drain Tank Level Alarm is received, STOP Heater Drain Pumps.
6.
If possible, vacuum should be maintained until the unit coasts
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down to app oximately 10% of rated speed.
199 005
2203-2.2 e
Revision 7 10/25/78 7.
OPEN/ Insure open the drair, valves (MS-V281 A/B, MS-V282A/B, MS-V283, MS-V284, MS-V285A/B, and MS-V286A/B) immediately and keep them open until the turbine metal parts and piping are cool.
8.
Place Turning Gear Control Switch in Auto and verify engagement of turning gear unless low bearing or low lif t oil pressure exists.
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9.
Manually throttle cooling water thru seal oil coolers (SC-V21 U
or SC-V25) to maintain seal oil temperature 90'-110 F.
Colder leak.
oil may seriously damage seal rings and allow a H2 10.
Notify H.P./ Chemistry to sample R.C. Letdown for Dose Equivalent Iodine between 2 and 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after a cower change of greater than
'A2 15% power-in-a-one hour period.
199 ORD6 40
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