ML20204B431
| ML20204B431 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 10/10/1978 |
| From: | Sjogren R Maine Yankee |
| To: | |
| Shared Package | |
| ML20204B428 | List: |
| References | |
| NUDOCS 7810170151 | |
| Download: ML20204B431 (4) | |
Text
..;.
~
~
l i
MAINE YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 78-9 FOR Tile MONTil 0F SEPTEMBER,1978 l
w, a) 9 7 Tri o r 7 o f 5/
h>,
^ ^
~
_z.
-~
OPERATING DATA REPORT DOCKET NO. 50-309 DATE 781010 COMPLETED BY R M. Sjocren i
TELEPHONE (6171366-9011X2281 OPERATING STATUS MAINE YANKEE Notes
- 1. Unit Name:
- 2. Reporting Period:
September, 1978 2630
- 3. Licensed Thermal Power (MWt):
830
- 4. Nameplate Rating (Gross MWe):
790
- 5. Design Electrical Rating (Net MWe):
800
- 6. Maximum Dependable Capacity (Gross MWe):
760
- 7. Maximum Dependable Capacity (Net MWe):
- 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report,Give Reasons:
-\\.
- 9. Power Level To Which Restricted. lf Any (Net MWe):
Approximate 1s 70's Failure of one main transformer.
- 10. Reasons For Restrictions,1f Any:
(See summary of operating experience.)
m i This Month Yr. to Date Cumulative e
i 720 6.551
- 11. Ilours in Reporting Period
- 12. Number OfIlours Reactor Was Critical 488 5.320 42.849 0
0 0
- 13. Reactor Reserve Shutdown Hours 453.57 5,216.87 41,374.87
- 14. Hours Generator On-Line 0
0 0
- 15. Unit Reserve Shutdown Hours 750,234 11,664,382 86,106,188
- 16. Gross Thermal Energy Generated (MWH)
- 17. Gross Electrical Energy Generated ($WH) 257,690 _ _,
3,856,150 28,094,320
- 18. Net Electrical Energy Generated (MWH) 242,263 3,662,189 26,595,460
~~
i
'63 79.6 80.1 l
- 19. Unit Service Factor
- 20. Unit Availability Factor 63 79.6 80.1 44.3 73.6 67.8
- 21. Unit Capacity Factor (Using MDC Net) 42.6 70.8 65.2
- 22. Unit Capacity Factor (Using DER Net) 37 5.2 3.7
- 23. Unit Forced Outage Rate
- 24. Shutdowns Scheduled Over Next 6 Months (Type.Date.and Duration of Eacht:
- 25. If Shut Down At End Of Report Period. Estimated Date of Startup:
- 26. Units in Test Status (Prior to Commercial Operation):
Forecast Achieved
\\
g -
INITIAL CRITICALITY INITIAL ELECTRICITY j_
COMMERCI AL OPER ATION l.
l (9/77) 1
+
y e
t
=,-
' AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
50-309 l-Maine Yankee WIT w
DATE 781010 v
COMPLETED BY R.M. Siocren (617)366-9011X2281 i
TELEPHONE MONTH September, 1978 l
DAY AVER AGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe Net)
(MFc-Net) 591 3
0 37 2
0 gg 585 3
n 39 591 4
0 20 588 5
23 586 1
0 i
0 6
22 592 7
0 23 591 0
8 24 592 9
25.
593 j
0 0
10 26 592 11 11 27 592 12 118 28 593 365 2i 593 13 593 14 386 30 15 387 3,
16 556 INSTRUCTIONS
~
dn this format list the average daily uliit power levelin MWe Net for each day in the reporting month. Compute to the nearest whole megawatt.
(9/77)
^
,1
~*
DOCKET NO.
50
.09 UNIT SHUTDOWNS AND POWER REDUCT'ONS UNITNAME I.f.ine Yankee DATE 731010 COMPLETED 8Y D M yinoynn REPORT MON 111 September, 1978 TELEPHONE f6171366-9011X2281' l
w.
E E
.5 ?
3
$YE Licensee P,
h Cause & Corrective '
No.
Date Q
5g N
355 Event gy 9-3 Action to F
$=
5 5 ;y3 g Report a tn U EO Prevent Recurrence e
O 7O 1-78-4 8-31-78 F
260.4 A
'3' NA EB TRANSF Winding failure of Main Transformer I B.
thru.
9-10.
2-78-4 9-11 F 27.1 A
1 NA CH VALVEX Stem / disc separation of #2 f eed Reg.
th r" Valve inlet isolation valve.
9-12-78 a
i
~
t i
2 3
4 F: Foiced Reason:
Method:
Exhibit G -Instructioris S: Scheduled A-Equipment Failure (Explain) l-Manual for Preparation of Data B-Maintenance of Test 2-Manual Scram.
Entry Sheets for Licensee C-Refueling 3-Automatic Scram.
Event Report (LER) File (NUREG-D-Regulatory Restriction 4-Other (Explain) 0161)
E-Operator Training & License Examination F-Administrative 5
G-Operational Error (Explain)
Exhibit I - Same Source (9/77)
Il-Ot her (Explain)
DOCKET NO.
50-309 UNIT Maine Yankee DATE 781010 COMPLETED BY R. M. Sjogren TELEPHONE (617)366-9011X2281 REPORT MONTH September, 1978 SUte!ARY OF OPERATING EXPERIENCES At the beginning of this month the plant was shutdown due to a failure i
of one of the plant's two half-capacity main transformers.
While the remaining transformer was being uprated to permit s70% operation the primary plant was cooled down to replace the seal cartridge in #2 RCP.
One of the four seals in this cartridge had failed shortly after startup following the refueling outage last month.
Leakage problems on the CEDM vents caused a delay of 3-4 days for plant startup.
The plant was placed on-line at 2320 on 9-10-78 but had to be taken off-line at 0456 on 9-11-78 when the inlet isolation valve to #2 feedwater regulating valve would not open and the valve stem became separated from the valve's gates.
Repairs were completed and the plant phased back on-line at 0802 on 9-12-78.
Plant load was stabilized at 48% by 0300 on 9-13-78 and physics testing was performedt Following the testing, load was increased to N69% (630 MWe) and maintained there for the rest of the month.
l l
t