ML19259C172
| ML19259C172 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 06/01/1979 |
| From: | Hunstad A NORTHERN STATES POWER CO. |
| To: | |
| Shared Package | |
| ML19259C171 | List: |
| References | |
| NUDOCS 7906140234 | |
| Download: ML19259C172 (4) | |
Text
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mar 7ATTV!' TJEN'?' 05 0"FA\\ TUN T.XPERT.FUCE pocket UO. 50 282 LTT.T reni _.in 79n 14 rgg _,
DAT" 790601 Cf"'"7.ETF9 FN A. A. Huns.t;jt_ __ __
d TrJ.nt"o::" 612-2C8-AN' o
sh vny, u May 1979 M
The unit was returned to service af ter refueling at 0213 on May 7th.
A malfunctioning feedwater regulating valve caused a trip at 0842 on May 12th; a.
E.
the unit was back in service at 1452. The valve repair was not successful,
'1 however, and power was limited to about 40% because of the malfunctioning r
valve.
An outage was taken at 1550 on May 13th and the unit returned to ser-vice at 0404 on May 14th.
On May 17th the valve stem was found broken and at 3043 another outage was taken to replace the stem; the unit was back in service at 2031.
The remainder of the month the unit was in Load Follow operation.
2278 254
.g906140 N Y*
DAILY UNIT POWER OUTPUT t
DOCKET NO. 50-282 UNIT Prairie Island No. 1 DATE 799601 COMPLETED BY A. A. Hunstad TELEPHONE 612-388-4767 MC NTil__.
May 1979 DAY AVERAJE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net 1
-2 17 223
-2 18 474 3
-4 19 503 4
,-10 20 506 3
_-15 21 472 6
-15 22 470 7
150 31 504 8
375 24 500 4
320 25 399 10 446 26
_ 349
'11 503 27 338 1'
233 28 170 11 98 29 407 14 246 30 501 15 427 31 501 16 498
.werage loads above 503 IMe-Net are due to cooler condenser circulating water.
2278 255
OPERATING DATA REPORT t
DOCKET NO 50 282 DATE 790601 COMPLETED BY A. A. Hunstad OPERATING STATUS TELEPHONE 612-388-4767 1.
Unit Name:
Prairie Island No. 1 2.
Reporting Period:
May 1979 Notes l
3.
Licensed Thermal Power (MWt):
1650 l
4.
Nameplate Rating (Gross FNe):
593 i
5.
Design Electrical Rating (Net FMe):
530 6.
Maximum Dependable Capacity (Cross FMe):
534 C
7.
Maximum Dependable Capacity (Net MWe):
503 g
8.
If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:
Give Reason:
[
9.
Power Level To Which Restricted, If Any (Net MWe):
o7 10.
Reasons for Restrictions, If Any:
This Month Yr-To-Date Cuuulative 744 3623 47831 i1.
Ilours In Reporting Period 12.
Number of Hours Reactor Was Critical 620.9 2923.7 37612.8 13.
Reactor Reserve Shutdown Hours 28.2 28.2 4483.3 is.
Hours Generator On Line 569.6 2870.5 36587.7 15.
Unit Reserve Shutdown llours 0.0 0.0 0.0 16.
Gross Thermal Energy Generated (BNil) 778462 4416524 56697106 17.
Gross Electrical Energy Generated (MWil) 248080 1457430 18488320 18.
Net Electrical Energy Generated (BNil) 229527 1365688 17294120 10 Unit Service Factor 76.6 79.2 76.5 20.
Unit Availability Factor 76.6 79.2 76.5 21.
Unit Capacity Factor (Using MDC Net) 61.3 74.9 71.9 22.
Unit Capacity Factor (Using DER Net) 58.2 71.1 68.2 23.
Unit Forced Outage Rate 4.7
,1.0 11.7 14.
Shutdowns Scheduled Over Next 12 Months (Type, Date and Duration of Each):
Refueling, Spung 80, 5 weeks 25.
If Shut Down at End Of Report Period, Estimated Date of Startup:
2278 256
UNIT SIIUTOGIOiS AND PO'.JER RIDUC TIONS DOCKEI N3.
50-282 REPORT MONTH May 1979 UNIT UX12 Prairia I11and No.1 DATE 790601 COMPLETED 3Y A. A. Hunstad - ~~~-~
TILEFii0.;Z 512-333-4767
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Causa 5 Caccactiva Date 3,
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N/A N/A Refueling J
790406 S
146.2 C
2 N/A l
m 790512 F 4 6.2 A
3 N/A lill VALVEX Trip due to malfunction of Loop A 1
feedwater regulating valva.
Pow-D er was then limited to approxi-mately 40% for about a day.
j 790513
!F 12.2 A
N/A N/A HH VALVEX Shutdown to repair Loop A feed-l water regulating valve.
h Shutdown to repair Loop A feed-790517 F
9.8 A
N/A 1 N/A HH VALVEX l
f
- <ater regulating valve.
l N
1 F: Forced Reason Method:
Exhibit G-In-S: Scheduled A-Equipment Failure (Explain) 1-Manual structions for B-Maint2 nance or Test 2-Manual Trip Preparation of C-Rafueling 3-Automatic Trip Data Entry Sheets N
D-Regulatory Restriction 4-Other (Explain) for Licensee Event U
E-Operator Training & License Examination Report (LER) Fila N
F-Administrative
('FJRFA0151)
G-Operational Error (N plain) 3-II-Othar (Sxplain Exhi'3it 1 - 1222 722