ML20136B883
| ML20136B883 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 10/31/1985 |
| From: | Langan J COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20136B874 | List: |
| References | |
| (0625M-62M), (625M-62M), NUDOCS 8511200308 | |
| Download: ML20136B883 (7) | |
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BYRON NUCLEAR POWER STATION UNIT 1 MONTHLY PERFORMANCE REPORT COMMONWEALTH EDISON COMPANY NRC DOCKET NO. 050-454 LICENSE NO. NPF-37 f
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Monthly Report for Byron Unit 1 A.
Summary of Operating Experience for Unit 1 The Unit began this reporting period returning to power following a minor reduction of power to facilitate repairs on a feedwater pump.
On October 3rd the Unit was briefly reduced to 75% power for condenser repairs.
4 On October 8th the Reactor was inadvertently tripped by a 2/3 signal of Reactor Coolant low flow which resulted from mechanics working on a common high side vent on the flow loop. The Unit was returned to power and remained at power until October 25th.
On October 25th a scheduled outage began which continued through the end of the reporting period.
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OPERATING DATA REPORT DOCKET NO.:
050-454 UNIT: Byron One DATE: 11/08/85 COMPILED BY:
J.E. Langan TELEPHONE:
(815)234-5441 x2825 OPERATING STATUS 1.
Reporting Period: October 1985. Gross Hours: 745 2.
Currently Authorized Power Level (MWt): 3411 Design Electrical Rating: 1175 (MWe-gross)
Design Electrical Rating: 1120 (MWe-net)
Max Dependable Capacity (MWe-net): NOT DETERMINED 3.
Power Level to Which Restricted (If Any): 1075 (MWe-gross) 4.
Reasons for Restriction (If Any): Excessive S/G Moisture Carryover i
t THIS MONTH YR TO DATE CUMULATIVE 5.
Number of Hours Reactor was Critical 593.5 953.5 953.5 6.
Reactor Reserve Shutdown Hours 0
0 0
7.
Hours Generator on Line 587.6 878.7 878.7 8.
Unit Reserve Shutdown Hours 0
0 0
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Gross Thermal Energy Generated (MWH) 1764810 2539701 2539701
- 10. Gross Elec. Energy Generated (MWH) 580820 832508 832508 7
- 11. Net Elec. Energy Generated (MWH) 546287 780512 780512
- 12. Reactor Service Factor 79.7 86.3 86.3
- 13. Reactor Availability Factor 79.7 86.3 86.3 l
- 14. Unit Service Factor 78.9 79.5 79.5
- 15. Unit Availability Factor 78.9 79.5 79.5
- 16. Unit Capacity Factor (Using MDC)
N/A N/A N/A
- 17. Unit Capacity Factor (Using Design MWe) 65.5 63.1 63.1
- 18. Unit Forced Outage Rate 2.9 9.0 9.0
- 19. Shutdowns Scheduled Over Next 6 Months (Scheduled outage is in progress.)
- 20. If Shutdown at End of Report Period, Estimated Date of Startup: 12/15/85
- 21. Units in Test Status (Prior to Commercial Operation): None FORECAST
. ACHIEVED Initial Criticality 1-25-85 2-2-85 Initial Electricity 3-1-85 Commercial Operation-9-16-85 l
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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. :
050-454 UNIT: Byron One DATE:
11/08/85 COMPILED BY:
J.E. Langan TELEPHONE:
(815)234-5441 x2825 MONTH: October, 1985 DAY AVERAGE DAILY POWER LEVEL (MWe-Net) 1.
933 17.
970 2.
976 18.
966 3.
895 19.
974 4.
913 20.
980 5.
968 21.
975 l
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967 22.
979 i
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968 23.
979 l
8.
967 24.
975 9.
134 25.
947 10.
533 26.
30 11.
954 27.
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12.
958 28.
0 13.
957 29.
0 14.
975 30.
0 15.
977 31.
0 16.
970 INSTRUCTIONS On this form list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt. These figures will be used to plot a graph for each reporting month.. Note that when maximum dependable capacity is used for the net electrical rating of the unit there may be occasions when the daily average power level exceeds the 100% line (or j
the restricted power level line.) In such cases the average daily unit power output _ sheet should be footnoted to explain the apparent anomaly.
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- eeeeeeeeeeeeeeeeeeeeen Report Period October, 1985 UNIT SHUTDOWNS / REDUCTIONS BYRON T
LER Number System Component Cause & Corrective Action to Prevent Recurrence m Hours Reason Method No.
Date 4) 85/10/09 F
17.6 H 3
Loss of loop 1D RCS Flow indication.
Instrument Mechanic working on 1FT-444 vented the high side of the instrument which took out.
all 3 flow transmitters.
5) 85/10/26 S
139.8 D 1
Scheduled outage for E.Q. Modifications and Steam Generator Modifications.
H - Instrument Mechanic error ococce*********
The Unit began a scheduled outage on October 25th which will last for approximately 7 weeks.
Summary ooooce*********
TYPE Reason Method System & Component F-Fcreed A-Quip Failure F-Admin 1-Manual Exhibit F & H S-Sched B-Maint or Test G-Oper Error 2-Manual Scram Instructions for C-Refueling H-Other 3-Auto Scram Preparation of D-Regulatory Restriction 4-Continued Data Entry Sheet E-Operator Training 5-Reduced Load Licensee Event Report
& License Examination 9-Other (LER) File (NUREG-0161)
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UNIQUE REPORTING REQUIREMENTS 1.
Safety / Relief valve operations for Unit One.
VALVES NO & TYPE PLANT DESCRIPTION DATE ACTUATED ACTUATION CONDITION OF EVENT 4
None 4
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LICENSEE EVENT REPORTS The following is a tabular summary of all licensee event reports for Byron Nuclear Power Station, Unit One, submitted during the reporting period, October 1 through October 31, 1985. This information is provided pursuant to the reportable occurrence reporting requirements as set forth in 10CFR 50.73.
Licensee Event Report Number Date Title of Occurrence 84-084-00 10-24-85 Delayed Fire Watch Due to Key Stuck in Vital Area Door Lock.
85-087-00 10-2-85 Fire Watches Not Promptly Initiated on Surveillance Failure.
85-089-00 10-8-85 Both Trains of Control Room Ventilation Inoperable.
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