ML20117G041

Special Rept 85-002:on 850401,during Periodic Testing,Diesel Generator a Failed Due to Restrictive Acceptance Criteria & Personnel Error.Procedure STS KJ-0054A Revised & Personnel Instructed on Importance of Following Procedures

ML20117G041
Person / Time
Site:	Wolf Creek
Issue date:	05/01/1985
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Martin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
85-002, 85-2, KMLNRC-85-099, KMLNRC-85-99, NUDOCS 8505130395
Download: ML20117G041 (3)

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KANSAS GAS AND ELECTRIC COMPANY THE ELECTAC COMPANY GLENN L KOESTER WKt pettactas? NuCLEAm May 1, 1985 Mr. R.D. Martin, Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 1000 Mhhhhh Arlington, Texas 76011 MAY - 6 085 ,,

KMLNRC 85-099 -

Re: Docket No. STN 50-482 --

Subj: Special Report 85-002

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, Ml

( C Glenn L. Koester Vice President - Nuclear GLK:bb Enc.

xc:PO'Connor (2)

JCummins 8505130395 850501 PDR ADOCK 05000482 S pop rao \

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201 N. Market - WIcNta, Kansas - Msa Address: RO. Box 208 I NcMa, Kansas 67201 - Telephone: Area Code (316) 261-6451 l

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Enclosure to SPECIAL REEORr 85-002 KMLNRC 85-099 DIESEL GENERA'IOR INVALID FAILURES On April 1, 1985, at approximately 0524 CST, an invalid failure of diesel generator (D/G) "A" occurred during periodic testing due to unnecessarily restrictive acceptance criteria ~ listed in the governing procedure. At approximately 1212 CST another invalid failure of D/G "A" occurred due to a personnel error.

On April 1, 1985, at approximately 0524 CST, surveillance testing was performed on D/G "A" per surveillance procedure STS-M-005A, " Manual / Auto Start, Synchronization, and Loading of Energency Diesel Generator NE01."

The diesel was secured ard the surveillance was terminated shortly thereafter because the diesel did not attain the proper speed within the time frame specified in the acceptance criteria of the surveillance procedure. .%e procedure specified that the diesel should reach at least 514 rpm within 10 seconds after start. During this test the diesel required 10.7 seconds to attain the required speed. Investigations into this failure to meet the procedural acceptance criteria for engine speed revealed that the requirement listed in the existing surveillance procedure was more restrictive than that found in the Surveillance Requirement of Technical Specification 4.8.1.1.2. W e Technical Specification Surveillance Requirement specifies that the diesel must attain 514 rpn in less than or equal to 12 seconds whereas the surveillance procedure specified that the diesel must attain 514 rpm in less than or equal to 10 secords. Temporary Procedure Change Form #MA 85-658 was issued to revise the acceptance criteria of STS U-005A to agree with the requirements of the Technical Specification. -

At approximately 1212 CST, STS M-005A was recommenced utilizing the revised acceptance criteria. D/G "A" was started and subsequently secured due to an operator failing to measure the time required for D/G "A" to reach the required frequency, speed, and voltage, as required by STS M-005A.

D/G "A" was restarted at approximately 1249 CST. We diesel generator attained the required speed and frequency within 12 seconds of start.

Werefore the revised acceptance criteria were met satisfactorily by this start. The diesel was loaded satisfactorily and subsequently secured at approximately 1414 CST. STS M-005A was empleted satisfactorily.

We plant was in Mode 5 throughout this testing sequence. D/G "B" was available for service during this time, thus satisfying the Technical Specification Limiting Condition for Operation 3.8.1.2. Although the restrictive acceptance criteria of STS U-005A were not originally met, the Surveillance Requirements of Technical Specification 4.8.1.1.2 were satisfied during the first start attempt and thus D/G "A" was available for service throughout this time period.

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• Spe'cial Report 85-002

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l W ese events are considered to be invalid failures of D/G "A" based on the criteria provided on Regulatory Position C.2.e of Regulatory Guide 1.108. I We first test of D/G "A" was terminated before cmpletion due to an error '

in an approved procedure and is classified as an invalid failure under Regulatory Position C.2.e. (2) . W e second test was terminated prior to ccmpletion due to an operating error and therefore it can be classified as an invalid failure per Regulatory Position C.2.e(4) .

% e unnecessarily restrictive acceptance criteria in procedure STS KJ-005A have been revised per Temporary Procedure Change Form MA 85-658 and a permanent change has been initiated. In order to prevent recurrence of -

similar personnel errors, this Special Report will be added to the Raquired Reading for Operations personnel to emphasize the importance of adhering to the steps specified in approved procedures.

There have been nine valid successful: tests of.both D/G ."A" and D/G "B" during the time period between the cmpletion of preoperational testing and the occurance of these failures. Prior to the occurance of the invalid failures documented in this report, D/G "A" had experienced three invalid failures since cmpletion of preoperational testing. One invalid failure occurred prior to receipt of the fuel load license and the other two invalid failures are discussed in Special Report 85-001. W ree invalid failures of D/G "B" occurred prior to receipt of the license. No valid failures of either diesel generator have occurred.

% ese events had no impact on the diesel generator surveillance testing frequency of at least once per 31 days. W is 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 nunber of failures in the last 100 valid tests is one or zero.

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