ML19322A272

Monthly Operating Rept for Feb 1979

ML19322A272
Person / Time
Site:	Three Mile Island
Issue date:	03/09/1979
From:	Mitchell D METROPOLITAN EDISON CO.
To:
Shared Package
ML19322A271	List: ML19322A270 ML19322A272
References
NUDOCS 7903160157
Download: ML19322A272 (4)

Text

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AVERAGE DAILY UNIT POWER LEVEL ,

I Docket No. 50-289 Unit TMI-1 Date March 9, 1979 Completed By D. G. Mitchell Telephone 215-921-6579 MONTH February DAY AVERAGE DAILY POWER LEVEL DAY AVERA0E DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 800 17 __-23 2 798 18 -15 3 797 _

19 -11 4 799 20 -07 5 801 21 -07 6 794 22 -07 7 789 23 -07 8 791 24 .

-06 787 25 -07 9

10 779 26 -07 780 27 -07 11 12 784 28 -06 13 788 29 1h 784 30 15 784 31 16 755 7903160167

OPERATING DATA REPORT Docket No. 50-289 Date Mnrch 9. 1979 Completed By D. G. Mitchell OPERATING STATUS Telephone 215-921-6579

1. -Unit Name: Three Mile Island Nuclear Station Unit 1

- 2. Reporting Period: February 3 Licensed Thermal Power (MWt): 2535

h. Nameplate Rating (Gross MWe): 871 5 Design Electrical Rating (Net MWe): 819

6. Max. Dependable Capacity (Gross MWe):840 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:

MONTH YR-TO-DATE CUMULATIVE 672 1416 39385

11. Hours in Reporting Period 384 1128 31731.8

12. No. of Hours Reactor was Critical 0 0 838.5

13. Reactor Reserve Shutdown Hours 384 1128 31180.9

14. Hours Generator On-Line 0 0 0 15 Unit Reserve Shutdown Hours

16. Gross Thermal Energy Generated (MWH) 955800 2828448 76531071 17 Gross Elect. Energy Generated (MWH) 321273 945996 254R4110

18. Net Electrical Energy Generated (MWH) 300031 888695 23880710 57.1 79.7 79.2 19 Unit Service Factor 57.1 79.7 79.2

20. Unit Availability Factor

21. Unit Capacity Factor (Using MDC Net) 57.5 80.9 76.7 Unit Capacity Factor (Using DER Net) 54.5 76.6 74.0 22.

23. Unit Forced Outage Rate 0 0 4.8

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Refueling February 17, 1979 - 6 weeks 25 If Shut Down at End of Report Period, Estimated Date of Startup; April 3 1979

26. Units In Test Status (Prior to Commercial Operation): FORECAST ACHIEVED INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCLSL OPERATION 4

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MAJOR SAFETY RELATED MAINTENANCE During the month of February the following maintenance was performed:

On February 16, 1979, at 2400, the turbine generator was taken off line to commence the refueling outage. The reactor coolant system was cooled down and depressurized in preparation for reactor vessel work. The following work was performed in preparation for the fuel shuffle:

1. Reactor vessel head fans renoved.

2. Reactor vessel head cables disconnected.

3. Reactor vessel APSR's and CRDM's uncoupled and parked.

4. Reactor vessel insulation removed.

5. Reactor vessel head detensioned.and removed.

6. FTC filled to refueling level.

Reactor Coolant Pump 1A No. 2 and No. 3 seals, and Pump 1D No. 1, 2, and 3 seals were removed for periodic inspection. A blank flange was installed to allow the reactor refueling evolution to continue while the seals were inspected. Also, React'or Coolant Pump 1C motor was uncoupled to allow the motor inspection for a ground to continue while the fuel shuffle was in progress.

RC-RV-1B was removed for pop testing per technical specifications. A spare valve, tested prior to the refueling outage, was installed in its place. The old RC-RV-1B

. will be pop tested later in the outage to ensure the setpoint was within the i specific limits.

Prior to starting the fuel shuffle, 19 incore detectors were pulled for replacement.

After the 19 incores were disposed of, the remaining incores were pulled to the parked positions. New incores (19) will be installed upon the completion of the fuel shuffle.

Also, the main fuel handling bridge control rod mast was removed for replacement of a cable. After the cable was replaced, the control rod mast was installed into the fuel handling bridge. Check out of the main fuel handling bridge revealed a problem with the hydraulic system. The mast was removed and repairs were performed satisfactorily.

The reactor refueling shuffle commenced on February 26 and continued into March.

TMI-l OPERATING

SUMMARY

FEBRUARY 1979 i

l Unit Performance Up to the commencement of the 1979 Refueling Outage, the Unit operated at essentially 100% power except for a brief unplanned reduction to 92% power on February 15, 1979. This reduction resulted from the loss of the "A" Vital Bus due to an. inadvertent ground during RMS Maintenance.

Significant Power Reductions 02/15/79 0835 hrs to 02/15/79 0838 - Reduction to 92% power due to loss of "A" Vital Bus l 02/16/79 2344-hrs. to end of month - 1979 Refueling Outage

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