ML20126J292

Special Rept 85-005:on 850502,invalid Failure of Diesel Generator a Occurred Due to Personnel Oversight in Restoring Diesel to Svc After Planned Outage.On 850501,diesel Generator a Taken Out of Svc for Insp of Welds

ML20126J292
Person / Time
Site:	Wolf Creek
Issue date:	05/30/1985
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Martin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
85-005, 85-5, KMLNRC-85-137, NUDOCS 8506100549
Download: ML20126J292 (3)

Text

KANSAS GAS AND ELECTRIC COMPANY THE ELECTFuC COMPANY OLENN L MOESTER

-..r...uu. m m .

1 May 30, 1985 Mr. R.D. Martin, Regional Administrator U.S. Maclear Regulatory Conmission 611 Ryan Plaza Drive, Suite 1000 ) ,$.a _@_ a$ [l S// @ b

Arlington, Texas 76011 <> ! '

2 KMINRC 85-137 Re: Docket No. SPN 50-482 '

Subj: Special Report 85-005 .. . w _ __.

Dear Mr. Martin:

'Ihe enclosed Special Report is submitted pursuant to Technical Specifications 6.9.2 and 4.8.1.1.3.

If you have any questions concerning this matter, please contact me or Mr. Otto Maynard of my staff.

Yours very truly, Glenn L. Koester Vice President - Nuclear Gm: dab i

Enclosure xc: PO'Connor (2)

JCunnins 8506100549 850530 PDR ADOCK 05000482 S PDR 3/

c[ \\

201 N. Market -Wichita, Kansas - Mail Address: RO. Box 208 I Wichita, Kansas 67201 - Telephone: Area Code (316) 261-6451 L. _ 1

Enclosuro to

'KMLNRC 85-137 SP0CIAL RFJ0fC 85-005 DIESEL GENERATOR INVALID FAILURE On May 2,1985, at approximately 0520 CM, an invalid failure of diesel generator (D/G) "A" occurred due to a personnel oversight in restoring the diesel to service after a planned outage.

On May 1,1985, at approximately 0920 CM, D/G "A" was taken out of service to allow maintenance to perform an inspection of welds on the conical baffle section of the coil guards for the generator. % e inspection was performed, aM post-maintenance testing connenced at approximately 0508 CM on May 2, 1985, in accordance with surveillance procedure STS KJ-005A, " Manual / Auto Start, Synchronization aM Loading of Energency Diesel Generator NE01". We diesel was subsequently secured because it did not attain the required voltage within the time frame specified in the Acceptance Criteria of STS KT-005A.

W e Clearance Order used to " tag out" and restore D/G "A" to service was reviewed in an attempt to discover the cause of the unsuccessful start attempt. It was determined that when the diesel was returned to service the fuses for generator field flashing had not been reinstalled as required by the Restoration Section of the Clearance Order used to take D/G "A" out of service.

We fuses were subsequently reinstalled and D/G "A" was restarted. The ergine started successfully, was loaded, ran for 61 minutes, and was secured at approximately 0645 C M on May 2, 1985. D/G "A" was unavailable for approximately 19 hours2.199074e-4 days <br />0.00528 hours <br />3.141534e-5 weeks <br />7.2295e-6 months <br /> fran the time it was taken out of service on May 1 until the successful completion of post-maintenance testirn on May 2.

W is Special Report will be added to the Required ReadinJ list for Control Roan personnel to emphasize the importance of ensurire systems are properly taken out of service and restored to service in accordance with the applicable Clearance Order.

W e unsuccessful start attempt at 0508 C M on May 2, 1985, is classified as an invalid failure per the criteria provided in Regulatory Position C.2.e. (2) of Regulatory Guide 1.108. % is unsuccessful start attempt can definitely be attributed to operating error in not ensurity the system was properly restored prior to the comnencement of post-maintenance testing.

Were have been eight (8) valid successful tests of D/G "A" since the completion of preoperational testiry on D/G "A", including the post-maintenance test mentioned in this report. During the same time period, including the invalid failure discussed in this report, six (6) invalid failures and no valid failures have occurred on D/G "A". Were have been six (6) valid successful tests on D/G "B" since the completion of preoperational testing on D/G "B". During the same time period, four (4) invalid failures and no valid failures have occurred on D/G "B".

Special Report 85-005 Page 2 te invalid failure discussed in this report had no impact on the diesel generator surveillance testing frequency of at least once per 31 days. Wis is in conformance with the specifications of Regulatory Position C.2.d. (1) of Regulatory Guide 1.108 and Technical Specification Table 4.8-1 which require the test interval to be not more than 31 days if the number of valid failures in the last 100 valid tests is one or zero.

N l