ML20115F121

Monthly Operating Rept for June 1996 for Wolf Creek Generating Station

ML20115F121
Person / Time
Site:	Wolf Creek
Issue date:	06/30/1996
From:	WOLF CREEK NUCLEAR OPERATING CORP.
To:
Shared Package
ML20115F114	List: ML20115F111 ML20115F121 ML20115F125
References
NUDOCS 9607170097
Download: ML20115F121 (6)

Text

. . - . . - . . - . . . . . . . . . . - . . . -. _ ,-- - _ ..- - .- . .-.. . . - - . . . . . . , _ ., _

4 1

i r

Attachment 1 to CO 96-0058 l 4

page-1 of 6 )

i l i

. 1 i

e a

l l

l l

1 i

1 WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION j J

MONTHLY OPERATING REPORT MONTH: June YEAR: 1996

-Docket No.: 50-482 Facility Operating License No.: NPF-42 Report No. 136 i

1 i

i 1

1 l

I i

i l

9607170097 960712 PDR l

ADOCK 05000482 R pop

. Attechme'nt 1 to CO 96-0058

SUMMARY

Tha following report highlights the operating experience of Wolf Creek Generating Station for the month of June, 1996. This report is being provided pursuant to Technical Spacification 6.9.1.8.

1 I.

SUMMARY

OF OPERATING EXPERIENCE Tha unit operated at or near 100% power, Mode 1, June 1, 1996, until 1320, June 6, 1996, when the Unit experienced a reactor trip caused by a "lo-lo" level in Steam Generator "C"

, which resulted from the failure of a 3/16" roll pin in the "C" Steam Generator Main Fasdwater Regulating Valve (FRV) which allowed the valve plug to separate from the valve stem. After the pin was replaced in the "C" FRV and pins were replaced in two other FRVs, the unit reached criticality at 0435, June 8, 1996, and the main generator output breakers ware closed at 1421, June 8, 1996. The unit remained at or near 100% power, Mode 1, i throughout the remainder of June, 1996.

l II. MAJOR SAFETY RELATED MAINTENANCE ACTIVITIES Rsplacement of roll pins with solid pins in three of the four Main Feedwater Regulating Valves (FRV). The fourth FRV already had a solid pin installed. (Reference LER 96-006-00).

1 l

I 1

r 4

I j Wolf Creek Generating Station Monthly Operating Report 4

June, 1996 Page 2 of 6 l

. 'Attachmsnt 1 to CO 96-0058

. OPERATING DATA REPORT DOCKET NO. 50-482 WOLF CREEK GENERATING STATION WOLF CREEK NUCLEAR OPERATING CORPORATION DATE 7-8-96 TELEPHONE 316-364-8831 OPERATING STATUS

1. Reporting Period: June, 1996 Gross Hours in Reporting Period: 720

2. Currently Authorized Power Level (MWt) 3565 Max. Depend. Capacity (MWe-Net); 1167 Design Electrical Rating (MWe-Net): 1170

3. Power Level to Which Restricted (If Any) (MWe-Net) : N/A

4. Reasons for Restriction (If Any) : N/A This Month Yr. to Date Cumulative

5. Number of Hours Reactor was Critical 680.7 2,718.2 77,334.9

6. Reactor Reserve Shutdown Hours 0.0 0.0 339.8

7. Hours Generator on Line 671.0 2,663.3 76,443.0

8. Unit Reserve Shutdown Hours 0.0 0.0 0.0

9. Gross Thermal Energy Generated (MWh) 2,349,911 9,237,833 254,579,503

10. Gross Electrical Energy Generated (MWh) 804,513.0 3,191,319 88,450,239

11. Net Electrical Energy Generated (MWh) 769,603.0 3,022,669 84,459,520

12. Reactor Service Factor 94.5% 62.2% 81.5%

13. Reactor Availability Factor 94.5% 62.2% S1.9%

14. Unit Service Factor 93.2% 61.0% 80.6%

15. Unit Availability Factor 93.2% 61.0% 80.6%

16. Unit Capacity Factor (Using MDC) 91.6% 59.3% 78.2%

17. Unit Capacity Factor (Using Design MWe) 91.4% 59.2% 76.1%

18. Unit Forced Outage Rate 6.8% 5.6% 4.8%

19. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of each):

None

20. If Shut Down at End of Report Period, Estimate Date of Startup: N/A Wolf Creek Generating Station Monthly Operating Report June, 1996 Page 3 of 6 1

l

. . - . _ . . - ~ . . . _ - - .- - .. .. - .- . - . . . . - - - - . . .- . -.. . - . - .

4

,

• Attachment 1 to CO 96-0058

. AVERAGE DAILY UNIT POWER LEVEL l DOCKET NO. 50-482 I

WOLF CREEK GENERATING STATION-WOLF CREEK NUCLEAR OPERATING CORPORATION l

DATE 7-8-96 i l TELEPHONE 316-364-8831 MONTH June, 1996  !

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) .

1 1176 17 1173 2 1176 18 1172 -

3 1176 19 1170 4 1175 20 1166 5 1174 21 1161 6 630 22 1168 7 0 23 1168 8 73 24 1162 9 1032 25 1161 i

10 1179 26 1168 _

11 1178 27 1168 12 1153 28 1163 13 1168 29 1168 14 1145 30 1166

'15 1171 31 N/A 16 1171

, Wolf Creek Generating Station Monthly Operating Report l June, 1996 Page 4 of 6

. to CO 96-0058 -

UNIT SHUTDOWN AND POWER REDUCTIONS DOCKET NO. 50-482 WOLF CREEK GENERATING STATIOlh WOLF CREEK NUCLEAR OPERATING CORPORATION DATE.7-8-96 TELEPHONE 316-364-8831 Type METHOD OF SHUTTING F: FORCED DURATION REASON DOWN THE REACTOR CORRECTIVE ACTIONS / COMMENTS No Date S: SCHEDULED (Hours) (1) OR REDUCING POWER (2) 1 6/6/96 F 49 A 3 Replacement of failed pins in Main Feedwater Regulating Valves

SUMMARY

The unit operated at or near 100% power, Mode 1, June 1, 1996, until 1320, June 6, 1996, when the Unit enperienced a reactor trip caused by a "lo-lo" level in Steam Generator "C" which resulted from the failure of a 3/16' roll pin in the "C" Steam Generator Main Feedwater Regulating Valve (FRV) which allowed the valve plug to separate from the valve stem. After the pin was replaced in the "C" FRV and pins were replaced in two other FRVs, the unit reached criticality at 0435, June 8, 1996, and the main generator output breakers were closed at 1421, June 8, 1996. The unit remained at or near 100% power, Mode 1, throughout the remainder of June, 1996.

1) REASON: A: EQUIPMENT FAILURE (EXPLAIN) E: OPERATOR TRAINING AND LICENSE EXAMINATION (2) METHOD: 1. MANUAL B: MAINTENANCE OR TEST F: ADMINISTRATIVE 2. MANUAL SCRAM C: REFUELING G: OPERATIONAL ERROR (EXPLAIN) 3. AUTOMATIC SCRAM D: REGULATORY RESTRICTION H: OTHER (EXPLAIN) 4. C01TTINUED

5. REDUCED LOAD

9. OTHER Wolf Creek Generating Station Monthly Operating Report June, 1996 Page 5 of 6

' Attachment 1~to CO 95-0058  !

WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION i UNIT NO. 1 l

MONTH June, 1996 r

SUMMARY

OF OPERATING EXPERIENCE Listed below in chronological sequence is a summary of operating experiences for this-month which required load reduction or resulted in significant non-load related incidents. (

l DATE T.U$E EVENT 6/6/96 1320 Reactor trip I

i l

Wolf Creek Generating Station Monthly Operating Report May, 1996 Page 6 of 6