ML20128B628

Special Rept 85-003:on 850409,black Smoke Observed Coming from Manifold of Diesel Generator B When Generator Started After Hot Web Deflection.Caused by Failure to Close Cylinder Petcocks.Petcocks Closed

ML20128B628
Person / Time
Site:	Wolf Creek
Issue date:	05/09/1985
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Martin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
KMLNRC-85-106, RO-85-003, RO-85-3, NUDOCS 8505240631
Download: ML20128B628 (3)

Text

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Om3 KANSAS GAS AND ELECTRIC COMPANY THE ELECT 84C COMPAFJY ota== c nossTan mg possessme. aswcLean May 9, 1985

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Mr. R.D. Martin, Regional Administrator fi j ' ,{' ,m

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U.S. Nuclear Regulatory Commission j; . _

Region IV ,L' l'  ;

611 Ryan Plaza Drive, Suite 1000 l' MM 41985 l i Arlington, Texas 76011 I '

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KMLNRC 85-106 Re: Docket No. STN 50-482 Subj: Special Report 85-003 Dear Mr. Martin The 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, GLK bb Enc.

xc:PO'Connor (2) , w/a JCummins, w/a g7 l, 20s N Marker -Mrure, Kansas - Med Address PO Bot 200 I Wichte, xensas 67209 - Telephone Area Code (316) 2616451

• EncicCura to KMLNRC 85-106 q ..

SPECIAL REI M 85-003 DIESEL GENERNIOR INVALID FAILURE On April 9,1985, at approximately 0612 CST, an invalid failure of diesel generator (D/G) "B" occurred due to a personnel oversight when restoring D/G "B" to service af ter maintenance.

On April 5,1985, at approximately 0620 CST, D/G "B" was tagged out for maintenance to perform a hot web deflection. Wis work was empleted, and on April 9,1985, at approximately 0612 CST, testing was begun on D/G "B" per the surveillance procedure STS U -005B, " Manual / Auto Start, Synchronization, and Ioading of Energency Diesel Generator NE02". When D/G "B" was started, the operator noticed that there was black smoke apparently coming out of the exhaust manifold. %e operator secured the engine, and an investigation into the problem was begun. It was discovered that the cylinder petcocks had not been closed prior to the initial roll of D/G "B",

and this caused the engine to blow black smoke. W e petcocks were closed and the engine was restarted per STS-KJ-005B at approximately 0732 CST. D/G "B" started aM was loaded successfully, and secured at approximately 0910 on April 9, 1985. We diesel was restored for automatic operation in accordance with SYS U-121, " Diesel Generator NE01 and NE02 Lineup for Automatic Operation" as required by STS KJ-005B. SYS M -121 was completed at approximately 0615 CST on April 11, 1985, thus satisfactorily mmpletirg STS U-005B. D/G "B" was declared operable at approximately 1134 CST on April 11, 1985.

We plant was in Mode 5 during this time period. D/G "A" was available for service throughout this period as required by the Limitirn Condition for Operation of Technical Specification 3.8.1.2. D/G "B" was unavailable for approximately six days while maintenance was being performed and post-maintenance testing was completed.

%is event is considered to be an invalid failure of D/G "B" based on the criteria provided in Regulatory Ibsition C.2.e of Regulatory Guide 1.108.

We start of D/G "B" at 0612 CST on April 9,1985, was terminated because of an operating error in not ensuring that the engine was properly restored subsequent to the maintenance that had been performed, and thus this event is an invalid failure per Regulatory Position C.2.e. (2).

A review has been initiated of all operatiry, surveillance, ard checklist procedures related to the diesel generators in an attempt to eliminate future personnel errors due to procedural problems. W is review is being coMucted by operatiry personnel with input from the diesel generator vendor. Wis Special Report is being added to Required Reading for Operations and Maintenance personnel to emphasize the importance of ensuring that systems are restored to the proper configuration after maintenance has been performed.

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Special Report 85-003 Page 2.

W ere have been nine valid successful tests performed on D/G "B" during the

. time period between the completion of preoperational testing and the occurrence of this iwalid failure. Wree previous invalid failures of WG "B" occured prior to receipt of the fuel load and five percent power license. Twelve successful valid tests have been performed on D/G "A" during the time period between the ampletion of preoperational testing on WG "A" and the occurrence of this iwalid failure of D/G "B". D G "A" has experienced a total of five invalid failures during this time period. Pbur of the iwalid failures have occurred subaequent to the receipt of the fuel load license and are discussed in Special Reports85-001 and 85-002.

His event had no impact on the diesel generator surveillance testing frequency of at least once per 31 days. m is is in conformance with the 8 specifications of Regulatory Position C.2.d. (1) of Regulatory Guide 1.108 and Technical Specification Table 4.8-1 which requiro the test interval to be not more than 31 days if the ntaber of valid failures in the last 100 valid tests is one or zero. "

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