ML20091N458
| ML20091N458 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 06/06/1984 |
| From: | Dixon O SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8406120324 | |
| Download: ML20091N458 (2) | |
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SOUTH CAROLINA ELECTRIC & GAS COMPANY con omen m CotuusiA. SoutM CAnoLINA 29218 f
O. W. Dinom. Ja, wei*,'J"d',"fo,
June 6, 1984 J
d Mr.- Harold R. Denton, Director Office of Nuclear Reactor Regulation
'.S. Nuclear Regulatory _ Commission U
[
Washington, D.C.;20555 l
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 i
License Condition 2.C.19 Diesel Generator Vibration Dear Mr. Denton
- Operating License Condition 2.C.19 for the Virgil C.
Summer Nuclear Station required further action by South Carolina i -
Electric and Gas Company (SCE&G) to) address Nuclear Regulatory Commission-(NRC) concerns relating to the Emergency Diesel Engine Auxiliary Support Systems.
This License Condition n
I required SCE&G to either qualify the skid-mounted control panels and mounted equipment for operation at the vibrational-stresses encountered during diesel engine operation, or floor 1
- mount the panels and equipment separate from the skid.
Except i
for sensors and other equipment that must be directly mounted
- on the diesel engine or associated piping, the skid-mounted relays and instrumentation will be remounted to meet this License Condition.
This remounting modification includes equipment associated with the emergency start of the engine, l
and equipment which, if it failed, could cause a diesel trip I,
after an emergency start.
j The affected relays will be mounted in a seismically qualified panel on the wall of the room below the diesel generator room.
The solenoid valves and pressure switches will be separated 4
from the skid and mounted on seismically qualified supports on the floor of the diesel generator room.
Pipe and conduit-2 connections to these solenoids and switches will be flexible to prevent transmission of vibration from the skid to the devices.
1 l
This modification is scheduled for completion during the first refueling outage in-September 1984.
Upon completion of this modification, SCE&G will consider that~1t has satisfied License
- Condition 2.C.19 for the Virgil C. Summer Nuclear Station.
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-0 Mr. Harold R. Denton Diesel Generator Vibration June 6, 1984 Page #2 If you have any questions, please advise.
Ver truly yours, j7'
/
O. W..
xon, Jr AMM/OWD/gj cc:
V. C.
Summer C. A. Price T.
C. Nichols, Jr./O. W. Dixon, Jr.
C. L.
Ligon (NSRC)
E.
H. Crews, Jr.
K.
E. Nodland E. C. Roberts R. A.
Stough W. A. Williams, Jr.
G.
Percival D. A. Nauman C. W. Hehl J. P. O'Reilly J. B. Knotts, Jr.
Group Managers H. G.
Shealy O. S. Bradham NPCF File I
.