ML20211J702
| ML20211J702 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 02/18/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8611110225 | |
| Download: ML20211J702 (2) | |
Text
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DUKE PowEn GOMPANY S{/
P.O. DOx 33100 citAltLOTTE, N.C. 28242 IIAL H. TUCKER TEIEPHONE cro4> ora-4soi LU f[] N A10 : Is February 18, 1986 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 Q
Dear Dr. Grace:
Pursuant"to' Technical Specification 4?8.t171:3' ands 6.'9.2',
please find attached a Special Report concerning the valid failure of Diesel Generator 1A which occurred on January 19, 1986.
Very truly yours, W
y
/
W Hal B. Tucker RWO:slb Attachment cc:
Director Office of Inspection adn Enforcement U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 NRC Resident Inspector Catawba Nuclear Station
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SPECIAL REPORT DIESEL GENERATOR 1A VALID-FAILURE
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On January 19, 1986 a valid failure occurred'on Diesel Generator
. i (D/G) 1 A.'
This valid failure was the fifth failure within the last 75 valid tests for the Catawba Unit 1 Diesel Generators.
Please
^
note that as.of January 19, 1986, the 1A'and 1B Diesel Generators had only completed 75 valid tests (this includes the five valid failures).
The failure occurred while the lA D/G was running in the fully
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loaded condition.
During the test, the fuel supply make-up x'
solenoid valve failed to open and provide fuel for the 1A D/G day tank.
Thirty-three minutes into the test, the lA D/G tripped due s
to a lack of fuel.
To correct the malfunction, the lA D/G day tank manual bypass supply valve was opened to refill the day tank.
In addition, an auxiliary. fuel oil pump was used to refill the 1A D/G fuel supply piping.
The lA D/G was restarted and verified ope'rable-by performing the 1A D/G operability periodic test.
The 1A D/G was.
. declared inoperable on January 19, 1986 at 2245 and was t,
w subsequently declared operable on January 20, 1986 at 1600.
,;n s
There fore, the 1A D/G was out of service for 17 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br /> and 15
/
minutes.. At this time,-the surveillance testing interval is 3 days e,
which is in accordance with Section C.2.d.4 of Regulatory Guide-
- c. ~
1.108' Revision 1 (Periodic Testing of Diesel Generator Units Used i
as Onsite Electric Power Systems at Nuclear Power Plants).
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