ML19224B126
| ML19224B126 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/25/1978 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| 2203-2.2, TM-0041, TM-41, NUDOCS 7906140076 | |
| Download: ML19224B126 (5) | |
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DOCUMENT NO:
COPY MADE ON 3
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I METROPOLITAN EDISON COMPANY.
M Wilda R. Mullinix, NRC 5:
h906140076 188 140
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2203-2.2.
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Revision 7
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THREE MILE ISLAND NUCLE AR STATION MR 2 3 G79 UtilT #2 ABilGRf'Af. PROCELURE 2203-2.2 TURB!t4E TLIP Table of Effective Pages Pace Date Revision Pape Date Revision Pace Date R evision 1.0 C4/18/78 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 6.0 31.0 56.0 7.0 32.0 57.0 8.0 33.0 58.0 9.0 34.0 59.0 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 66.0 17.0 42.0 67.0 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 Recommend: Approval Unit 2 Staff Recommends Approval
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D ate Date Approval Approval Cc;ninnt Dept. Head C:;niunt Dept. He:d Unit 1 FORC Recommends Approvci Unit 2 FORC Ru:cmmends Approval
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7 Date Chairman f PORC 4 Chairman of PORC I
Unit 1 Superintend:nt Approval Unit 2 Superintend n Approval M
Date e
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,D ta Maneg:r Generation Quality As:urance Approval IDU l
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Revision 3 04/18_/78 THREE MILE ISLAftD tiUCLEAR STATI0ti
' R 2 3 B7J UtlIT #2 ABliORMAL PROCECURE 2203-2.2 TUR8ItiE TRIP l
,3 1.0 SYMPTOMS A
ICS in the tracking mode.
1.
Turbine throttle, intercept and reheat stop valves closed.
2.
i Generator breakers open and megawatts electric to zero.
3.
I Reactor power decreasing.
4.
Any one of the following cause a turbine trip:
5.
a.
Generator trip b.
Reactor trip Both feed pumps tripped i
c.
i Loss of all three Secondary Closed Cooling Water Pumps d.
1 Vacuum <l8 - 22" Hg e.
Loss of 2 of 3 TURBI?4E SPEED SIGTiALS f.
Thrust bearing failure trip >75 - 80 psig pressure h.
Low bearing oil pressure trip <5-7 psig i.
EHC loss of D.C. power j.
High vibration (greater than 14 mils. for 10 Sec.)
k.
Pressurizer level increasing above 240", steam pressure in:reasing 6.
above 885 psig, and T avg. increasing above 58'.U F.
2.0 IMMEDIATE ACTIOil A.
Autcmatic Action _
Turbine t..cottle, govenor, intercept and reheat stop 1.
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valves close and Generator breakers open.
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i 22n3-2.2 Revision 3 j
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Turbine bypass valves or atmospheric relief open t APR 2 3 W3 l
control 885 PSI header pressure.
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3.
Pressurizer Pcwer 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 l
back is 50%/ min. to 15% power.
5.
If both the main feed pumps have tripped, the steam driven emergency feed pump & two motor driven emergency feed pumps will start.
6.
The feed demand will control 0.T.S.G. at minimum level (30").
7.
The Seal Oil Backup Pump, Bearing Oil Lift Pumps and Turning Gear Oil Pump will start as turbine speed decays.
8.
Extraction valves on all feedwater heaters close, and 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 Turning 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 i
2.
If any feedwater stations are in hand, total feedwater
-f should be reduced manually to that corresponding to IS%
neutron power.
188 143 2.0
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2203-2.2 Revision 6 10/06/78 3.
If Diamond Power or Reactor Master is in hand, run rods in manually to 15t neutron power.
4.
If any of the following ICS stations are in Hand (Steam Generator / Reactor Demand 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 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 02155 PSIG and steam header pressure setpoint 0885 PSIG to control T avg. 0582 F.
Adjust makeup and letdown flows to control pressurizer level 0240".
Adjust feed ficw to control OTSG levels #30".
3.
If vacuum is lost in main condenser, verify atmospheric reliefs are controlling header pressure at 885 PSI and reduce reactor power to zero.
(Hot Standby) Add required makeup to U
makeup tank as T avg. is reduced to 532 F.
4 If turbine t' rip is due to loss of both feed pumps, verify emergency feed pumps started and are delivering water to the OTSG's.
Control EF-VilA/B to maintain OTSG levels at 30".
5.
If Lcw Heater Drain Tank Level Alarm is received, STOP Heater Drain Pumps.
g 6.
If possible, vacuum should be maintained until the unit coasts
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down to approximately 10% of rated speed.
3.0 188 144
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2203-2.2
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Revision 7 10/25/78 APR 2 3 1973 7.
OPEN/ Insure open the drain 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 lift oil pressure exists.
9.
Manually throttle cooling water thru seal oil coolers (SC-V21 or SC-V25) to maintain seal oil temperature 90 -110 F.
Calder oil may seriously damage seal rings and allow a H leak.
2 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 power change of greater than 15% power in a one hour period.
5
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3 188 145 4.0
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