ML20137K539

Monthly Operating Rept for Oct 1985

ML20137K539
Person / Time
Site:	Wolf Creek
Issue date:	10/31/1985
From:	Koester G, Mike Williams KANSAS GAS & ELECTRIC CO.
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV), NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
KMLNRC-85-254, NUDOCS 8512030220
Download: ML20137K539 (9)

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WOLF CREEK GENERATING STATION MORPHLY OPERATING REPORT MONni: October YEAR: 1985 Docket Ib.: SIN 50-482 Facility Operating License No.: NPF-42 Report No. 8 Subnitted by:

Kansas Gas and Electric Canpany 8512030220 851031 DR ADOCK0500gG2 pj p

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- We following report highlights the operating experience of Wolf Creek Generating Station for the month of October, 1985. Wis report is being provided pursuant to Technical Specification 6.9.1.8.

I. SUPMARY OF OPERATING EXPERIENCE Two unplanned unit shutdowns occurred during the nonth of October.

We first shutdown was a manual reactor trip on October 7 due to Circulating Water System problems. A strong wind blew an excess of plant material towards the Circulatirg Water System intake structure.

A failure of system instrmentation preventei early detection of a developiry problem, and the result was a buildup of plant material on the screens, reduced Circulating Water flow, and ultimately causing screen danage and the collapse of one screen. During this event, the diesel fire pmp was also danaged. We danaged screens were repaired, and the unit was started on October 10. During this startup, a secord unit trip occurred due to Stean Generator level swings while increasing unit load. We unit was restarted successfully, and operated at a reduced power until repairs were completed on the collapsed screen on October 26.

II. MAJOR SAFET1"I RELATED MAINfENANCE ACTIVITIES te major safety related maintenance activity performed during the month of October was the reassembly and testing of the Positive Displacement Charging Pmp. We pmp exhibited signs of excessive leakage, and further repairs are currently in progress.

III. CHANGES, TESTS, AND EXPERIMENPS We following is a brief description of safety evaluations performed pursuant to 10 CFR 50.59 on changes, tests, aryl experiments during the month of October,

l. Temporary Modification 85-SE Originated to allow test flange downstreau of valve BG-V-526, Seal Water Injection Filters Inlet Drain Valve, located in Centrifugal Garging Pump lbom "B", to remain installed and to allow the use of Swagelock fittings in place of a permanently installed blind flange. W e Swagelock fittings have a higher pressure rating than the blind flange. No unreviewed safety or environmenta' questions are generated as a result of this temporary change.

2. 'Ivmporary Modification 85-SE-100 - Originated to establish a temporary flowpath fran the recycle erapordor concentrates discharge to the spent fuel pool to allow boration evolutions of the spent fuel pool while the transfer canal is dry and isolated from the spent fuel pool by the spent fuel pool gate. We flow path was established so as to minimize any potential siphoning effects and is to be removed prior to placement of any spent fuel within the spent fuel pool. No unreviewed safety or environmental questions are generated as a result of this temporary change.

3. Temporary Modification 85-SE Origin ted to allow the installation of a non-safety related gasket in a pmp in the Boron Recycle System. We replacement gasket satisfies the pmp requirements, and is to be used until it can be qualified or a qualified replacement is obtained. Integrity of leak tightness will be achieved by the use of this gasket. No unreviewed safety or environmental questions are generated as a result of this temporary change.

4. Temporary Modification 85-SE-102 - Addition of piping to the plant heatire system to allow on-line a3dition of corrosion inhibitors to the system. No unreviewed safety or environmental questions are generated as a result of this temporary change.

5. Safety Evaluation 85-SE-103 - Originated to allow plant operation with a differential temperature across the condenser of 38 degrees Fahrenheit until an inoperable circulating water pe p could be returned to service. W is increase does not affect the functional capabilities of the Essential Service Water System. Wis situation poses no environmental concerns due to the maximm discharge temperature allowed and the season in question, early fall. No unreviewed safety or environmental questions are generated as a result of this temporary change.

6. Temporary Modification 85-SE-104 - Installation of temporary pmp skids for temporary fire pmps due to the permanent diesel fire pmp being inoperable. No unreviewed safety or environmental questions are generated as a result of this temporary change.

7. Safety Evaluation 85-SE-105 - Modification of the Nuclear Steam Supply Systen and Balance of Plant computer data bases to set the allowed deviation between shutdown bank and shutdown rod position to the expected deviation of 96 when any shutdown bank is between 18 and 210 steps (transition range) . This change will avoid nuisance alarm conditions during normal plant transitions. No unreviewed safety or environmental questions are generated as a result of this change.

8. Engineering Evaluation Request 85-GK-ll - Originated to allow the use of a different model hydramotor actuator on valve GK-V-766 in the (bntrol Building Heating, ventilation, and Air Conditioninj Systen in place of an inoperable actuator. his valve controls the Essential Service Water cooling water flow to the Control Ibom Air Conditioning Unit, SGK04B. Both models are qualified environmentally and seismically for safety related applications outside contaiment. Wis change was made permanent by the approval of Plant Modification Request 01388. No unreviewed safety or environmental questions are generated as a result of this change.

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9. Plant Modification Request 01195 - Originated to route concentrated sulfuric acid addition piping direct to the high Total Dissolved Solids Collector Tanks (THF01A&B) through Alloy 20 piping and camponents. Wis change mitigates extensive Secondary Waste System corrosion damage to 316L S.S. components and piping.

No unreviewed safety or environmental questions are generated as a result of this change.

10. Plant Modification Request 01307 - Originated in response to the identificat' ion of electrical separation violations in the Reactor Building. Due to practical limitations of the specific raceway configurations, exposed non-class lE cables which exit Terminal Boxes 'IB25101 and TB 25102 and various class lE raceway and electrical equipnent in the innediate area do not meet separation criteria. We failure analysis on the subject circuits concluded that the installation is acceptable to use-as-is. Were exists no unreviewed safety or environmental questions in the present configuration.

11. Plant tedification Request 01333 - In order to facilitate total drairxlown of the dip tanks (SHD01A, B and SHD02A, B) arrl the turbulator (SHD03), in the Decontamination System, check valves in the drain lines were removed, vent valves were added ard vent piping was altered. No unreviewed safety or environmental questions were generated as a result of this change.

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OPERATING DATA REPORP DOCKET NO. STN 50-482 WOLF CREEK GENERATING STATION.

KANSAS GAS AND ELECTRIC COMPANY' DATE 11-01-85 COMPIRI'ED BY M. Willians TELEPHONE 316-364-8831 OPERATING STATUS

1. Importing Period: October, 1985 Gross Hours in Reporting Period: 745

2. Currently Authorized Power Ievel(MWt): 3411 Max. Deperd. Capacity (MWe-Net) : 1128 Design Electrical Rating (MWe-Net): 1170

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

4. 1%asons for restriction (If Any): N/A

'Ihis Month Yr to Date Ctynulative

5. Number of Hours Reactor was Critical 675.3 1326.3 1326.3

6. Reactor Reserve Shutdown Hours 69.7 78.7 78.7

7. Hours Generator on Line 665.9 1307.6 1307.6

8. Unit Reserve Shutdown Hours 19.0 19.0 19.0

9. Gross Thennal Energy Generated (WH) 2,086,772 4,139,795 4,139,795

10. Gross Electrical Energy Generated (MWH) 716,052 1,416,889 1,416,889

11. Net Electrical Energy Generated (MWH) 683,791 1,354,242 s1,354,242

12. Reactor Service Factor 90.6 93.7 93.7

13. Reactor Availability Factor 1_00.0 99.2 '99.2

14. Unit Service Factor 89.4 92.4 92.4

15. Unit Availability Factor 91.9 93.7 93.7

16. Unit Capacity Factor (Using MDC) 81.4 84.8 84.8

17. Unit Capacity Factor (Using Design MWe) 78.4 81.7 81.7

18. Unit Forced Outage Rate 10.6 7.6 7.6

19. Shutdowns Scheduled Over Next 6 Months (Type, Date, ard Duration of each): None

20. If Shut Down at End of Report Period, Estimated Date of Startup: N/A

21. Units in test Status (Prior to Commercial Operation): Forecast Achieved Initial Criticality 5-22-85 5-22-85 Initial Electricity 6-13-85 6-12-85 Cmunercial Operation 9-09-85 9-03-85 Page 4 ot 7l

UNIT SHUfDOWN AND POWER REDUCTIONS -

DOCKEP NO. S'IN 50-482 WOLF CREEK GENERATING STATION KANSAS GAS AND ELECTRIC COMPANY DATE 11-01-85

, COMPLETED BY M. Williams REPORT MONIE October, 1985 TELEPHONE 316-364-8831-TYPE ME"IHODS SHUffING F: EORCED DURATION REASON DOWN THE REACIOR CORRECTIVE ACTIONS /COMM Wo No Date S: SCHEDULED (HOURS) (1) OR REDUCING POWER (2) 20 851007 F 60.0 H 2 Unit was manually tripped due to reduced circulating water flow caused by a buildup of plant material on the circulating water traveling screens.

(Licensee Event Report 85-069-00).

21 851010 F 19.0 G 3 Unit trip due to Stean Generator level swings while increasing unit power. (Licensee Event Report 85-072-00)

SGMARY: On October 7, unit load was redaced due to excessive plant material accunulation at the Circulatirg Water System intake screens. 'Ihe unit was manually tripped shortly thereafter due to reduced Circulating Water flow. A second trip occurred during startup after this outage. 'Ihe unit was restarted successfully on October 10 and operated at a reduced power for part of October due to repairs being made to one Circulating Water System bay.

(1) REASON: A: EQUIPMENP FAILURE (EXPIAIN) E: OPERA'IOR TRAINING AND LICENSE EXAMINATION (2) MEIHOD: 1. MANUAL B: MAINTENANCE OR TEST F: ADMINISTRATIVE 2. MANUAL SCRAM C: REFUELING G: OPERATIONAL ERROR (EXPIAIN) 3. AUIOMATIC SCRAM D: REGULA'IORY RESTRICTION H: OIEER (EXPIAIN) 4. OIEER (EXPIAIN)

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'- AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. STN 50-482 WOLF CREEK GENERATING STATION KANSAS GAS AND ELECTRIC COMPANY DATE 11-01-85 COMPLETED BY M. Williams TELEPHONE 316-364-8831 MONIH October, 1985 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 1125 17 1016 2- 1132 18 1022 3 1095 19 1035 4 913 20 1037 5 1134 21 1033 6 1138 22 1036 7 646 23 940 8 0 24 939 ,

9 0 25 1028 10 16 26 1054 11 564 27 1124 12 1008 28 1120 13 1007 29 1118 14 1013 30 1119 15 1001 31 1121 16 1009 Page 6 of 7

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KANSAS GAS AND ELECTRIC COMPANY WOLF CREEK GENERATItG STATION UNIT NO. 1 MONIH October, 1985 SlM4ARY OF OPERATING EXPERIENCE Listed below in chronological sequence is a sumary of operating experiences for this month which required load reduction or resulted in significant non-load related incidents.

1%TE TIME EVENT October 1, 1985 0000 Unit in Mode 1 and synchroedzed to the grid.

October 7, 1985 1240 Comenced manual power reduction due to Circulatire Water screen t' rouble due to build-up of plant material resulting in increased differential pressure across the screens.

1355 Manually tripped the unit due to reduced Circulating Water system flow. Entered Mode

3. Reportable per 10 CFR 50.72 and 50.73.

October 9, 1985 1019 Received Control Room Ventilation Isolation Signal due to a momentary low voltage condition in a Control Ibom radiation monitor, caused by a lightning strike.

Reportable per 10 CFR 50.72 and 50.73.

1942 Comnenced reactor startup. Entered Mode 2.

October 10, 1985 0059 Entered Mode 1.

0156 Synchronized to the grid.

0224 Turbine trip ard Reactor trip occurred due to Steam Generator level swings while increasing unit load. Entered Mode 3. Reportable per 10 CFR 50.72 and 50.73.

. 1732 Comenced reactor startup. Entered Mode 2.

1958 Entered Made 1.

2127 Synchronized to the grid. Power limited to approximately 90% for repair to a circulating water intake screen and to replace heater drain pump *A" seals.

October 26, 1985 1945 Repair to circulatiry water intake screen couplete. Comenced ramping power to 100%.

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KANSAS GAS AND ELECTRIC COMPANY ,

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_ . _.. _ _ ... 1 Novenber 15, 1985 Director, Office of Resource Managenent U.S. Riclear Regulatory Comission Hashington, D.C. 20555 M@ B DFF ]

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Mr. E.H. Johnson, Acting Director N0t/ 2 01%5 i Division of Reactor Safety and Projects U.S. Riclear Regulatory Connission -

Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 KMINRC 85-254 Re Docket No. STN 50-482 Subj: October, 1985 Monthly Operating Report Gentlenen:

Enclosed is the October, 1985 Monthly Operating Report for Wolf Creek Generating Station. This submittal is being made in accordance with the requirements of Technical Specification 6.9.1.8.

Yours very truly, Glenn L. Koester Vice President, Nticlear i GE:see Enclosure

! cc: PO'Connor (2), w/a l Jfaylor (12), w/a JCumins, w/a A

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2o1 n. u.,s.t -wem . xansas -u.u Ass,.ss: na so 20e t ucma. xansas 6n01 - T&ptwne: Area code 916) 261-6451