ML20116E872
| ML20116E872 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 11/05/1992 |
| From: | Woodard J SOUTHERN NUCLEAR OPERATING CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 92-004, 92-4, NUDOCS 9211100058 | |
| Download: ML20116E872 (1) | |
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Xgj Soutnern Nucidar Operaung Company -
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- Post Offce Box 1295 r 4
fwninoham. Alabama 35201
' Telepp 205 868 '086 A o. we Southem Nudear Operating Company
[*,[pQ November 5, 1992
. the Louthern 0!ect'C Sy%em Docket Nos. 50-348 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Joseph M. Farley Nuclear Plant - Unit 1 Special Report No.92-004 C02 Isolated to 4160 Volt Bus.lJ For Greater Than 14 Dqvs Gentlemen:
This Special Report is being sutmitted in accordance with Technical-Specification 3.7.11.3 due to the fact that-the CO system to the IJ 4160-2 volis bus was not restorea to operable' status within _14 days.
On 9-27-92 at 0845, the 5 ton _C02 unit for the Diesel Generator. Building-
-was isolated to allow investigation:of-an. inadvertent system discharge into s.
the'lJ 4160-volt's bus.---On-10-2-92-at 1130,:the 5 ton _CO2 unit to the:
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' Diesel Generator Building was unisolated;Lhowever, the CO2 piotection for 4160 volts' bus -1J-remained disabled to a " V for troubleshooting and. repair.-
of that portion of the system _. An:inve:..gation into the inadvertent 1 ~
system discharge.reycaled a DC? system ground 'roblem, lhe DC system ground-was due to a loose:te:minal inside the master valve box and defective: heat-
-detectors. :Due-to operational' constraints the 4160 volts-bus 1J could not1 be de-energized to-allow replacement of the defective: heat detectors within a
- 14. days..All;Technict) Specification required actions associated:with q
3.7.11.3 were met.for. the. time period in which the 5 ton unit.wassisolated.
j-Corrective maintenance was completed for the. portion of'the Diesel Building-C0 1 system supplying the-IJ'4160. volts bus and the system vas restored-to'-
2 operable status:on-10-25-92 at..1600.
All_ Technical Specifit ation. required actions associated with 3.7.11.3'were met for:the time peris t in which the!
'CO2 system was -isolated to the IJ 4160 volts bus _
E Respectfully submitted,-
L 92.111000589211oY h
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(N... Woodard~
i PDR-ADOCK 05000348-J S-PDR LCDC:cht-92.3396 i r. S. D. Ebneter
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