ML20245H044
| ML20245H044 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/31/1989 |
| From: | Stewart W, Tillack B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 89-578, NUDOCS 8908160294 | |
| Download: ML20245H044 (14) | |
Text
_
4 VIRGINIA ELECTRIC AN9 POWER COMFANY RICIIMOND, VIRGINIA 23261 I
August 11, 1989 U. S. Nuclear Regulatory Commission Serial No.89-578 Attention: Document Control Desk NO/JMJ:Jmj Washington, D.C. 20555 Docket Nos.
50-338 50-339 License Nos. NPF-4 NPF-7 i
Gentlemen:
i
- ylRGINIA ELECTRIC AND POWER COMPANY 1
- NORTH ANNA POWER STATION UNITS 1 AND 2 MONTHLY OPERATING REPORT Enclosed is the Monthly Operating Report for North Anna Power Station Units 1 and 2 forthe month of July 1989.-
Very truly yours, N
W. L.' Ste@Ktt Senior Vice President - Power Enclosures cc:
U.S. Nuclear Regulatory Comfnission 101 Marietta Street, NW Suite 2900 Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resident inspector North Anna Power Station
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' MONTHLY OPERATING REPORT MONTH JULY YEAR 1989
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l OPERATING DATA REPORT DOCKET NO.
50-338 DATE 08-07-89 COMPLETED BY Bob T111ack TELEPHONE (703) 894-5151 X2632 OPERATING STATUS
.1.
Unit Name:
North Anna 1
- 2.. Reporting Period:
JULY 1989 L3.
Licensed Thermal Power (MWt):
2893 4.
Nameplate Rating (Gross MWe):
947 5.
Design Electrical; Rating (Net HWe):
907
- 16.. Maximum Dependable Capacity (Gross MWe):
963 7.; Maximum Dependable Capacity (Net MWe): _
915
- 8..If Changes occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report, Give Reasons:
N/A 9.'
Power Level'To Which Restricted, If Any (Net MWe):
N/A
- 10. Reasons For Restrictions, If Any:
N/A This Month Yr.-to-Date Cumulative 11'.
Hours In Reporting Period 744 5,087 97,379 12.
Number of Hours Reactor Was Critical 376.3 1,710.4 67,929.8 13.
Reactor Reserve Shutdown Hours 55.8 94.8 6,552.1
- 14. Hours Generator On-Line 338.7 1,672.8 65,187.3 15.
Unit Reserve Shutdown Hours 0
0 0
- 16. Gross Thermal Energy Generated (MWH) 814,390 4,269,043 172,429,036 17.
Gross Electrical-Energy Generated (MWH) 261,378 1,406,036 56,580,385 18.
Net Electrical Energy Generated (MWH) 245,899 1,330,312 53,522,204 19.. Unit Service Factor 45.5 32.9 66.9 20.
Unit Availability Factor 45.5 32.9 66.9 21.
Unit' Capacity Factor (Using MDC Net) 36.1 28.6 61.6 22.
Unit Capacity Factor (Using DER Net) 36.4 28.8 60.6
- 23. Unit Forced Outage Rate 7.6 9.8 14.7 24.
Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
25.
If Shut Down At End Of Report Period, Estimated Date of Startup:
26.
Units In Test Status (Prior to Commercial Operation):
Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION i
1
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AVERAGE DAILY UNIT POWER 12 VEL DOCKET NO.
50-338 UNIT HA-1 I
DATE 08-07-89 COMPLETED BY Bob T111ack TELEPHONE 703-894-5151X2632 MONTH JULY 1989 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)
(MWe-Net) 1 0
17 209 2
0 18 223 3
0 19 452 4
0 20 13 5
0 21 412 6
0 22 811 7
0 23 845 8
0 24 896 9
0 25 907 10 0
26 906 11 0
27 906 12 0
28 905 13 0
29 874 14 0
30 905 15 0
31 908 j
1 16 75 i
INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
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UNIT SHUTDOWN AND P0kIR REDUCTIONS' EXPLANATION ' SHEET DOCKET No.
50-338 REPORT MONTH.
JULY UNIT NAME NA-1 YEAR 1989-DATE 08-07-89 COMPLETED BY Bob Tillack 89-04 At 1740 hours0.0201 days <br />0.483 hours <br />0.00288 weeks <br />6.6207e-4 months <br />, on July 19, 1989, North Anna Unit 1 experienced an automatic reactor trip from 90% power.,
Unit I had' been operating in steady state conditions for approximately 20 minutes after ramping to 90% power.
No maintenance activities were ongoing.
The initiating signal for the reactor trip was a turbine trip.
The-turbine. trip was due to a failed 0-ring on. turbine trip solenoid operated. valve SOV-20-ET which resulted in _the loss-of electro hydraulic ' control (EHC) ' system pressure.
The loss of EHC pressure resulted in the four turbine throttle valves closing which generated the turbine -trip signal.
A. reactor trip signal was automatically initiated since power was greater than 10%.
No safety injection (manual or automatic) was initiated or required during the event.
~
Investigation determined-the cause of the trip to be the failure of an 0-ring in turbine trip SOV-1-EH-SOV-103 (20-ET).
The 0-ring appeared to have been pinched / split the last time the trip' block had been-reassembled. This. valve had been inspected during the refueling outage.
Engineering is-performing a root.cause analysis of the failure.
4 M-_-_A_._..__.
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.x l ' ;..g NORTH ANNA POWER STATION y
UNIT NO.
1 MONTH JULY io
SUMMARY
OF OPERATING EXPERIENCE
,.: e-l.
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.4 Listed below.in-chronological sequence is a summary of operating.
experiences for-this month which required load reductions or resulted in:
significant non-load.related. incidents.
DATE TIME-DATA-it 0000 Began Month with Unit Shutdown in Mode 5.
July.1,.1989
' July 13,11989 2034 Entered Mode 4.
- July 14, 1989 1448 Entered Mode.3.
.-July 15, 1989 1418 Commenced Reactor Startup.
1428 Entered Mode 2.
1532 Reactor critical.
'1720 Commenced Reactor Core Physics testing.
July 16, 1989 0826 Completed Reactor Core Physics. testing satisfactorily.
1234
' Entered Mode 1.
1459 Unit On line, commence rampup to 30% power.
1705 Unit stabilized.at 30% power, 272 MW. for Chemistry hold.
July 18, 1989 0015.
Cleared Chemistry hold.
0030 Commencing Rampdown for turbine overspeed test.
0210 Unit off line.
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, NORTH ANNA POWER STATION p
UNIT NO.
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MONT11 JULY SUMNARY OF OPERATING EXPERIENCE
. Listed below'in chronological sequence is a summary of operating experiences for this, month which. required load reductions or resulted'in
.lsignificant.non-load related incidents.
DATE.
-TIME DATA'
,J' July 18, 1989-0215 Entered Mode 2.-
0245 Completed turbine overspeed test
- satisfactory.
0346 Entered Mode 1.
n.
0439-Unit on line.. commence rampup to 30% power.
0600 Unit stabilized at 30% power, 272 MW for Chemistry hold.
1457 Cleared Chemistry hold, commencing rampup at 4% power per hour to 75% power, 680 MW.
July 19, 1989 0715 Stabilized at 75% power, 680 MW for flux map.
1240 Flux map' complete, commence rampup to 100%
power, 960 MW.
1740 RX trip on turbine trip due to' loss'of Electro-Hydraulic Control System Pressure.
July 20, 1989 0435 Commenced Rx startup.
4 0734 Entered Mode 2.
I 0951 Rx critical..
]
q 2107 Entered Mode 1.
2136 Unit on line, commencing rampup to 30%.
' power.
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-NORTH' ANNA POWER ~ STATION-UNIT NO.
1 MONTH JULY-t
SUMMARY
OF OPERATING EXPERIENCE-i Listed below in chronological sequence is a summary of operating experiences'for;this month _which required load reductions or resulted in
(
significant non-load related incidents.
'1i DATE
- TIME DATA-
['
July 20, 1989 2218 Unit stabilized.at 30% power, 272 W for cl Chemistry hold.
i.
July 21, 1989' 0218 Cleared Chemistry hold, commencing rampup-to 100% power, 960 W.
July 22,-1989 1600 Holding power at 92% power, 865 W for Chemistry hold.
4-1938 Cleared Chemistry hold, commencing rampup to 100% power.
- July 23,'1989 2043 Unit stabilized at 100% power, 955 W.
July 29, 1989 0256 Commenced rampdown to 96% power, 900 W for feed train maintainance.
0430 Unit stabilized'at 96% power, 900W.
1705 Feed train maintenance completed, commenced rampup to 100% power, 960 W.
1745 Unit stabilized at 100% power, ~ 960 W.
July 31, 1989 2400 Ended month with Unit at 100% power, 960 W.
3
m:
OPERATING DATA REPORT DOCKET No. 50-339 DATE 08-07-89 COMPLETED BY Bob T111ack TELEPHONE (703) 894-5151 X2632 OPERATING STATUS 1.
Unit Name:
North Anna 2 L2.
Reporting Period:
JULY 1989 3.
Licensed Thermal Power (MWt):
2893 4.
Nameplate Rating (Gross MWe):
947 5'
Design Electrical Rating (Net MWe):
907 6.
Maximum Dependable Capacity (Gross MWe):
963 7.
Maximum Dependable Capacity (Net MWe):
915
- 8. - If Changes Occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report, I
Give Reasons:
N/A 9.
Power Le' vel To Which Restricted, If Any (Net MWe):
N/A I
- 10. Reasons For Restrictions, If Any:
N/A This Month Yr.-to-Date Cumulative 11.
Hours In Reporting Period 744 5,087 75,647 12.
Number of Hours Reactor Was Critical 744 3,245.9 60,449.1 13.
Reactor Reserve Shutdown Hours 0
152.8 5,854.9 14 Hours Generator On-Line 744 3,214.7 59.578.9 15.
Unit Reserve Shutdown Hours 0
0 0
- 16. Gross Thermal Energy Generated (MWH) 2,152,082.6 8,183.231.9 157,524,230.9 j
17.
Gross Electrical Energy Generated (MWH) 709,522 2,704,634 51,496,263 18.
Net Electrical Energy Generated (MWH) 673,822 2,557,923 49,500,246 19.
Unit Service Factor 100 63.2 78.8 1
20.
Unit Availability Factor 100 63.2 78.8
- 21.. Unit Capacity Factor (Using MDC Net) 99.0_
54.9 73.0 3
22.
Unit Capacity Factor (Using DER Net) 99.8 55.4 72.2 1
- 23.,Unic Forced Outage Rate 0
0 7.6
~2 4.
Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
3 25.
If Shut Down At End Of Report Period, Estimated Date of Startup:
26.
Units In Test Status (Prior to Commercial Operation):
Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION i
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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
50-339 UNIT NA-2 DATE 08-07-89 COMPLETED BY Bob T111ack TELEPHONE 703-894-5151X2632
. MONTH
-JULY 1989 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)
(MWe-Net) 1 908 17 908 21 909 18 908 3
908 39 907 4
909 20 906 5
908 21 906 6
907 22 905 7
906 23 903 8
907 24 902 9
905 25 903 10 905 26 903 11 904 27 904 12 904 28 906 13 904 29 906 1
14 899 30 905 1
15 905 31 908 16 906 J
INSTRUCTIONS j
i On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
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i UNIT SHUTDOWN AND POWER REDUCTIONS.
EXPLANATION SHEET DOCKET No.
50-339:
REPORT MONTH JULY' UNIT NAME NA-2 YEAR 1989-DATE 08-07-89 COMPLETED BY Bob Tillack u
No Entries i
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, _ = _ - - _ _ _ _ _
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~' '.y 9 Yl. *'
s NORTH ANNA POWER STATION UNIT NO.
2 MDNIB JULY
SUMMARY
OF OPERATING EXPETJENCE Listed below 'in chronological sequence is a summary of operating experiences for this month which required load reductions or resulted in significant non-load related incidents.
DATE' TIME DATA July 1, 1989
[0000 Began' Month with Unit at 100% power, 957 MW.
July =14,-1989 0831 Commer.ced rampdown to 860 MW, 92% power for
' turbine valve freedom test.'
1008 Turbine valve freedom test satisfactory, ecumencing rampup to 100% power, 960 MW.
'1130 Reactor is stable at 100% power, 960 MW.
July-31, 1989 2034 Completed month with Unit 100% power, 954 MW.
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