ML20211J627
| ML20211J627 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 02/17/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8611110198 | |
| Download: ML20211J627 (2) | |
Text
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l DUKE POWEIt GOMPANY t
P.O.Dox 33180 CIIARLOTTE, N.O. 2824e liAL 15. TUCKER
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February 17, 1986 Dr.
J. Nelson Grace, Regional Administrator U.
S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 i
Re:
Catawba Nuclear Station, Unit 1 D o c k e t N o. -5 0 - 4 1 3 C+
Dear Dr. Grace:
Pursuant.to, Technica 1 Specification 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 January 18, 1986.
Very truly yours, 7C Hal B. Tucker RWO:clb Attachment cc:
Director Office of Inspection adn Enforcement U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 NRC Resident Inspector Catawba Nuclear Station f*%i I
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SPECIAL' REPORT DIESEL GENERATOR 1B VALID FAILURE On January-18, 1986, a valid failure occurred'on' Diesel Generator
.(D/G) lB.
This valid: failure was'the fourth failure within the last 74 valid tests.for the Catawba. Unit 1 diesel generators.
Please note that as of January-18, 1986, the 1A and 1B D/G's had.
only' completed 74 valid tests (this includes the four valid
-failures).
The cause of the valid failure.was an. apparent equipment malfunction in the-starting air system. fWe have not been-able to-
' identify specifically the component that malfunctioned.
Attempts to reconstruct'this failure during subsequent' start attempts have
. not been successful.
To avoid failures of this type in the_ future, procedure changes will be made to include necessary prestart checks that must be.-' completed each time the D/G is to be started.
The 1B D/G_was out of service for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and 52 minutes.
After this
- failure, the testing fre'quency is o'nce every 3 days whichois in--
accordance with Section C.2.d.4 of Regulatory Guide 1.108 Revision 1 -(Periodic Testing of Diesel Gene'rator Units 'used as Onsite Electric Power Systems at Nuclear Power. Plants).
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