ML20062F578
| ML20062F578 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 12/13/1978 |
| From: | Mitchell D METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML20062F575 | List: |
| References | |
| TASK-TF, TASK-TMR NUDOCS 7812190170 | |
| Download: ML20062F578 (4) | |
Text
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AVERAGE DAILY UNIT POWER LEVEL 50-289 Docket No.
TMI-1 Unit 12-13-78 Date D. G. Mitchell Completed By 215-929-3601 Ext. 6579 Telephone PONTH Nove=ber DAY AVERAGE DA 3Y POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Ne')
(MWe-Net) t Th7 1
793 17 651
(
2 798 ig 561 3
797 19 700 h
791 20 705 5
_795 21 7b3 6
79h 22 791 7
790 23 789 8
790 2h
~
791 9
789 25 793 10 790 26
(
793 11 792 27 700 12 796 28
~'
705 l
13 798 29 I01 1h 789 30 15 602 31 16 6h4 l
i l
l 781219017o
4 OPERATING DATA REPORT Docket No.50-28o Date 11-13-78 Completed By D. G. Mi+ 4.,,
OPERATING STATUS Telephone e, e_coe_ogm v.,.+.
6579 1.
Unit Name: Three Mile Island Unit 1 j
2.
Reporting Period:
November -
3.
Licensed Thermal Power (MWt):
2535 k.
Nameplate Rating (Gross We):
871 5
Design Electrical Rating (Net MWe): 819 6.
Max. Dependable Capacity (Gross MWe): 8h0 7.
Max. Dependable Capacity' (Net MWe):
776 8.
If Changes Occur in Capacity Ratings (Items No. 3 through 7) Since Last Report, Give Reasons:
9 Power Level to which Restricted. If Any (Net MWe):
10.
Reasons for Restrictions, If Any:
w Month Yr.-to-Date Cuz::ulative 720 8016 2722s
- 11. Hours in Reporting Period 720 6801.5 29859.8 12.
No. of Hours Reactor was Critical 838.5 0
'O
- 13. Reactor Reserve Shutdown Hours 71 5 6711.4 29308.9 lb. Hours Generator On-Line 0
0 0
15 Unit Reserve Shutdown Hours
- 16. Gross Thermal Energy Generated (WH) 1760710 1o443106
- 718966r, 17 Gross Elect. Energy Generated (MWH) 5837h3 Sh22526 220' e;22R
- 18. Net Electrical Energy Generated (MWH) 549273 5087711 22h06110 99 0 o3.7 78.7 19 Unit Service Factor 99 5 83.7 78.7
- 20. Unit Availability Factor 90*3 80.3 76.0 21.
Unit Capacity Factor (Using MDC Net)
- 22. Unit Capacity Factor (Using DER Net) 93.1 77.5 79. c 0.5 3.1 50
- 23. Unit Forced Outage Rate 2h. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
Refueling. 2-17-79, six veeks 25 If Shut Down at End of Report Period Estimated Date of Startup:
- 26. Units In Test Status (Prior to Commercial Operation):
FORECAST Ac m vw INITIAL CRITICALI1f INITIAL ELECTRICITY COMMERCIAL OPERATION l
=
x Docket No.,50-289 UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH NOVFNBER D
12-13-78 Completed BY D. G_ Mitchell Telephone 215-929-3601 Ext 6579 e
l 87 D
System Component Cause and Corrective No.
Date Type cu p
}h E
Dg g@
Code h Code 5 Action to Prevent Recurrence
{
ggo g
g nm
$$E EEj en m
10 11-15-70 F
3.5 A
N/A Loss of D.C. power to the E!!C Control System causing a turbine trip. The reactor ran back to 20% F.P.
11 11-17-70 F
0 Reduced power to isolate the B side of the L.P.
8th stage heater string for repair of leaks.
12 11-18-70 F
0 Reduced power due to the FWP iB tripping. The trip was caused by thrust bearing problems.
1 2 eason:
3
~ ""
I: Fomed R
Methodt F
f r Preparation of Data S: Scheduled A-Equipment Failure (Explain) 1-ilanual B-Maintenance or Test 2-Manual Scram.
'E #
C-Refbeling 3-Automatic Scram.
D-Regulatory Restriction h-Other (Explain)
E-Operator Training & Licensee Examination F-Administrative 5 Exhibit 1 - Same Source G-Operational Error (Explain)
H-Other (Exp]nin)
a
__.m.,m
_, _.. w
-w
. 33 i
i OPERATING
SUMMARY
NOVEMBER 1978 The Unit operated at essentially 100% full power until November 11, 1978,,
at which time the powei was reduced to 65% full power for approximately one hour to perform tt.e scheduled Turbine Stop Valve Testing. The Unit then continued at 100% until November 15 at which time the turbine tripped (Reactor held at %20% power) as a result of a loss of.DC power to the Electro-Hydraulic Turbine Control System. With the suspected source of the power supply problem resolved, the generator breakers were reclosed within 3.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> with 100% power attained on November 16, 1978, approximately 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> following the trip.
As a result of the secondary plant transient experienced on November 15 Low Pressure Feed Heater leaks increased to the point where heater drain level control became unreliable. Power was temporarily reduced on November 17, 1978 to 75% to isolate the "B" Low Pressure Feedwater Hester String.
The Unit returned to 100% Reactor Power within an hour while the "B" Feedwater String remained isolated in order to perform necessary' repairs (25 leaking Feedwater tubes were repaired).
On November 18, 1978, the "B" Main Feedpump tripped as a result of performing the routine Thrust Bearing Wear trip test. The Unit ran back to 75% as a result of the feedpump trip and remained at 75% power uncil November 20 l
at which time, with both the 8B FW Heater and the B Feedpump repaired, the Unit escalated back to 100% full power. The cause of the trip was determined to be improper installation of the thrust bearing wear detector.
The Unit remained at 100% full power for the remainder of the month, i
The Unit continues to experience feedwater heater leaks, specifically in the 4B High Pressure Heater, however because of the inability to effectively isolate this heater and because these leaks have stabilized at this point, we expect to continue to operate with this condition until the 1979 Refueling Outage.
On October 20, 1978, the Unit's maximwn dependable capacity was reduced from 792 MWe to 776 MWe as a result of the actual generation experience with the Unit over the last four years of commercial operation and as a j
result of new metering techniques across the Unit's main transformer.
l MAINTENANCE
SUMMARY
There was no major safety related maintenance performed during the month.
J e
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