ML20050B731
| ML20050B731 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/12/1980 |
| From: | Beers F Maine Yankee |
| To: | |
| Shared Package | |
| ML20050B728 | List: |
| References | |
| NUDOCS 8204070296 | |
| Download: ML20050B731 (6) | |
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MAINE YANKtE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 80-06 i
FOR THE MONTH OF JUNE, 1980 l
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82040702 % 800712 gDRADDCK 03000309 PDR l
OPERATING DATA REPORT DOCKET NO. 309 DATE 800712 CO31PLETED BY F.
C.
Beers TELEPIIONE 617-366-9011 X2215 OPERATING STATUS
- l. Unit Name:
M ine Yankee Notes Power level restricted by steam flow through the T Qortm;pt.w _
. Tune 19RO LP turbines.
- 3. Licensed Thermal Power (31Wt):
2630 864
- 4. Namepiste Rating (Gross 31We):
825
- 5. Design Electrical Rsting (Net 31We).
850
- 6. 31sximum Dependable Capacity (Gross 31We):
810
- 7. 31srimum Dependable Capscity (Net 31We):
- 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7)Since Last Report, Give Reasons:
' 9. Power Lese! To Which Restricted.If Any (Net 31We):
i: 864 MWe (%97%)
S A Un'*
10(" = = N " - ' + ^ ~ ' r h m p2. ' PoQtL L L 1/T'L (ZE ;FCM IE a C4 STVt \\
ltD u) LP "I'd'/i/.'?)
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m Tids 31onth
.Yr.. o-Dste Cumulstive 720 4,367.00
- 11. Ilours In Reportin; Period 484.54 2,605.07 53,815.07
- 12. Number Of flours Rescror Was Criticag
- 13. Resetnr Reserve Shutdown Hours 0.00 0.00 0.00
- 14. flours Generator On.Line 448.53 2,429.59 51,947.40 0.C9 0.00 0.00
- 15. Unit Reserve Shutdown flours
- 16. GrossTherms! Ener y Generated (31Wil) 1,046,555.6 5.233,568.00 110,475,651.00
- 17. Gross Electrical Ener;y Generated (31Wil) 346.060 sQt) 1.730.510.00 36.303.690.00 ISJ Net E!ectrical Ener;y Generated (31Wil) 330.935.00 1.646.135.00 34,473,322.00
- 19. Unit Senice Factor 62.30 55.64 77.55 62.30 55.64 77.55
- 20. Unit Availability Factor 56.74 46.54 66.73,
' 21. Unit Capacity Factor (Using SIDC Net)
- 22. Unit Capacity Factor (Using DER Net) 55 71 45.69 61 49
- 23. Unit Forced Outs;e Rate 36.28*
12.54*
7.17*
- 24. Shutdowns Scheduled Over Next 6 Stonths (Type. Date.snd Durstion of Each1:
- 25. If Shut Down At End Of Report Period. Estimated Date of Startup:
- 26. Units in Test Status (Prior to Commercial Operation):
Forecast Achieved INITIA L CRITICA LITY INITIA L ELECTRICITY CONDIERCIAL OPERATION
- Correction made on last month's figures.
'(0/77)
AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
50-309 UNIT Maine Yankee DATE 800712 F. C. Beers COMPLETED BY TELEPHONE 617-366-9011 X22151 JUNE 1980 MONT11 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe Net)
(MWe Net:
1 24 37
6 6 0 68 gg 812 2
3 0
39 813 814 4
0 20 0
5 21 815 811 6
0 22 7
0 23 813 810 8
O 24 806 9
0 25 10 0
26 808 806 II O
27 820 12 0
28 13 261 29 818 14 678 825 30 15 809 3;
16 698 INSTRUCTIONS On this formst. list the average daily unit power leselin.'lWe Net for each day in the reporting month. Compute to the nearess whole megswatt.
(9/77) e
UNITSilUTDOWNS AND POWER REDUCTIONS DOCKET NO.
50-309 UNIT NAM E Maine Yankee DATE 800712 REPORT MONTil JUNE 1980 COMPLETED ItY F.
C.
Beers TELEPl!ONE 617-166-9011 X2215 e.
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L Cause & Corrective g"3 No.
Date g
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,g Event u9 g-Action tu 5j Report #
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$2 5,
'y U Prevent Itceurrence d
8-80-5 5-30-80 S
16.07 H
1 N/A RC ZZZZZ Shutdc wn to accomplish chemical clean-thru plus ing of the RCS to remove core crud.
6-1-80 (47.27 total) 9-80-5 6-2-80 F
255.40 A
1 80-016/03L HB VALVEX-F Failuro of #1 S/G NRV disc. Valve thru was dioassembled, disc removed and 6-13-80 repaire d.
L.R.
6-16-80 F
42.00 A
1 N/A HF HTEXCH-D Condenser tube leak in the "C" water-to thru-box 1 t abe plugged and 1 tube re-rolled 75%
6-18-80
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F: Foiced Iteason:
Method:
Exhibii G. Inst ructions S: Scheduled A Eiluipment Failure (Explain) 1 Manual for Pieparation of Data 11 Maintenance of Test 7 Manual Scrain.
Entry Sheets foi 1.ieensee C Itefueling 3 Autoniatic Scram.
j Evens Itcport (Llitti Fde INUltEC.
D Itegulatiny Itestriction 4 Other (Explain) 01611 E. Ope:ator Training & License Exaniination I
l' Administrative 5
G Ogwiational I.iner (lixplain)
Exlnhis I.Same Source (9/17)
Il-Othes (!!xplain)
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DOCKET NO.
50-309 UNIT Maine Yankee DATE 800712 COMPLETED BY F. C. Beers TELEPHONE 617-366-9011 X2215 REPORT MONTH JUNE 1980 PAGE 1 0F 2 S!ENARY OF OPERATING EXPERIENCES At the beginning of the month the plant was shutdown and had just completed core crud removal operations utilizing hydrazine additions with the plant in the Hot Shutdown condition. The core crud removal operations were performed in response to'an increasing core pressure drop which had been observed during the previous month.
Although not considered 100% effective, crud removal operations were com-pleted on June 1.
The reactor was taken critical and the plant phased on to the grid by late that same afternoon. Further evaluation of the core D/P situation would follow.
As the operators began loading the plant, it was obser;ved that #1 S/G pressure was %100 psi higher than the other stear terators. Further investigation revealed that apparently #1 S/G non-retuta valve was not fully open.
Efforts to free the valve were unsuccessful. On June 2nd the plant was taken off-line and cool down of the reactor coolant system commenced to allow repairs to be made to #1 S/G NRV. -
With the plant cooled down, #1 S/G NRV was disassembled. The inspection of the valve revealed that a weld had failed which connects the disc to the disc guide.
Repairs were made to the disc and the valve was reassembled.-
While the plant was cooled down, additional core crud removal operations were performed utilizing additions of hydrogen peroxide which had been successful during previous crud removal operations.
With the #1 S/G NRV repaired and core crud removal operations complete, the plant was heated up and the reactor was taken critical on June 13th.
The unit was phased to the grid that same day and by June 15th the plant was back to full load.
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DOCKET NO.
50-309 UNIT Maine Yankee DATE 800712 COMPLETED BY F. C. Beers TELEPliONE 617-366-9011 X2215 REPORT MONTH JUNE 1980 PAGE 2 of 2 SU.' NARY OF OPERATING EXPERIENCES On June 16th, a load reduction to 75% was performed to locate and plug
'a suspected condenser tube leak. One tube was found leaking and was plugged, and a second tube was found to.have a bad roll into the tube-sheet and was re-rolled. The plant was back at full load by June 18th and remained there for the remainder of the month.
Following core crud removal operations and during the return to power, lithium hydroxide additions were made to the reactor coolant system to maintain a lithium inventory of a si ppm in an attemp,t to control the RCS crud inventory. Preliminary results indicate that core D/P is not increasing and that the lithium control may be successful.
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