ML20207K611
| ML20207K611 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 12/23/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8701090465 | |
| Download: ML20207K611 (2) | |
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|---|---|
Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER)
MONTHYEARML20216E5401999-09-0707 September 1999
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Text
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P.O. box 33180 CHARLOTTE, N.C. 98949 HAL B. TUCKER '
TELENONE
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m J/A 5 A9: l8 December 23, 1986 l
Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Re: Catawba Nuclear Station, Unit 1 Docket No. 50-413
Dear Dr. Grace:
Pursuant to Technical Specifications 4.8.1.1.3 and 6.9.2, please find attached a Special Report concerning the valid failure of Diesel Generator 1B which occurred on November 23, 1986.
Very truly yours,
/. /
h we Hal B. Tucker RWO/53/ sib Attachments xc: Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Comunission Washington, D. C.
20555 NRC Resident Inspector Catawba Nuclear Station 87010'?O46S 861223 PDR ADOCK 05000413 s
PDR dg Ob
/o, SPECIAL REPORT DIESEL GENERATOR (D/G) V/J ID FAILURE ON NOVEMBER 23, 1986 On November 23, 1986 during testing of the IB D/G, a trip occurred approximately 1 minute after the start. A Work Request initiated an investigation. The problem was traced to a lube oil pressure transmitter, ILDPT-5171A. An internal valve assembly was not functioning correctly in that it was continuously venting a control air shutdown line. The faulty instrument was replaced, and additional testing verified D/G operability. The total time of IB D/G inoperability was from November 23, 1986 at 0845 hours0.00978 days <br />0.235 hours <br />0.0014 weeks <br />3.215225e-4 months <br /> to November 23, 1986 at 2300 hours0.0266 days <br />0.639 hours <br />0.0038 weeks <br />8.7515e-4 months <br />.
This valid failure is the fifth valid failure within the last 96 valid testo and the third valid failure within the last 20 valid tests. Hence, the current testing interval for the IB D/G is seven days, which is in accordance with Technical Specification 4.8.1.1.2.
1 1
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