ML20006B989

Special Rept 1-90-01:on 900103,when Diesel Generator 1B Started for Monthly Surveillance,Low Turbocharger Oil Pressure Annunicator Alarmed.Caused by Small Leak on Low Oil Pressure Switch.Switch Replaced & Surveillance Completed

ML20006B989
Person / Time
Site:	Vogtle
Issue date:	01/29/1990
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1-90-01, 1-90-1, ELV-01271, ELV-1271, NUDOCS 9002060171
Download: ML20006B989 (2)

Text

. . _ _ . .. .

-.e .,'.,w

- Georg;a Power Company .,

XJ i ; 333 Piedmont Asnue i

, . ).4t . Atlanta Geo*g=a 30308

A

. .; ; , Teleppno 404 $26 3195 Kfaaeg AddrinsE 40 lnere ss Center Parkway

. Post Offee Dox 1295- -

._ B,rmnghant Alabama 35201.

• Telephone 205 8084581 -

' January 29, 1990 tr e , ,, ,n ,%,,n ry,,,y

~

-'W. G. Hairston lit .

senior vice Pitmdent ' i Eclear Operatons ELV-01271 0212- -I

Docket.No. 50-424 ,

U. S. . Nuclear _ Regulatory Commission .

ATTNi. Document-Control Desk

> Washington, D. C. '20555  :

.{

Gentlemen:

V0GTLE ELECTRIC GENERATING PLANT I SPECIAL REPORT INVAllD DIESEL GENERATOR FAILURE

~

In.accordance with the requirements of the Vogtle Electric Generating Plant Technical Specifications', -Sections 4.8.1.1.3 and 6.8.2~, Georgia Power Company is submitting-the. enclosed Special Report concerning an invalid '

diesel generator failure.

Sincerely, i

gddl-l{ Y '

W..G. Hairston, III  :

WG'H,III/NJS/gm

Enclosure:

Special Report 1-90-01

.c(w): Georaia Power Company Mr. C. K. McCoy-

~

i Mr. G. Bockhold, Jr.

.Mr. P. D. Rushton Mr. R. M. Odom NORMS-V. S. Nucleae Reaulatory Commission -

Mr. S. D. Ebneter, Regional Administrator. I p Mr. D. B..Matthews, Director, Project Directorate II-3 Mr' R. F. Aiello, Senior Resident Inspector, Vogtle 9002060171 900129 PDR ADOCK0500g.{4 S .

-c

.r ,

h ENCLOSURE V0GTLE ELECTRIC GENERATING PLANT - UNIT 1 TECHNICAL SPECIFICATION SPECIAL REPORT 1-90-01 i INVALID DIESEL GENERATOR FAILURE A. REQUIREMENT FOR REPORT This report is required.in accordance with the Vogtle Electric Generating

' Plant Technical- Specifications, Section 4.8.1.1.3. This section of the Technical Specifications requires that all diesel generator failures, valid ,

or non-valid, be reported to the Commission in a Special Report pursuant to i Technical: Specification 6.8.2. J i

B. DESCRIPTION OF: INVALID FAILURE FOR DIESEL GENERATOR TRAIN B On January 3,1990, Diesel Generator 1B was started (Start Number 1-90-110) for the monthly surveillance. After the engine was started, the low turbocharger oil ' pressure annunciator alarmed. The turbocharger oil pressure was verified to be normal and the turbocharger' low oil pressure switches were checked for leaks. Finding no immediate problems, loading of 1 the generator proceeded. Several minutes after full loading was achieveo, the diesel tripped.

l

' Further investigation revealed a small air leak on the right bank .

{

turbocharger low oil pressure switch. The. switch was replaced, the diesel  !

generator.was restarted, and the surveillance was completed with no further

• problems. During this time, the diesel generator was never unavailable for ;l emergency operation since the turbocharger . low oil pressure switches are L bypassea in the emergency mode. -l C.

SUMMARY

This event-is classified as an invalid failure per Reg. Guide 1.108, Section C.2.e.(2) because the turbocharger low oil pressure switches are bypassed in l the emerger,cy mode.

-i '

Since there have been no valid failures in the past 20 valid tests, the test frequency for diesel generator 1B remains at 31 days in accordance with Table 4.8-1 of the Technical Specifications, i

_ _ _ . - - - _ _ _