ML20116N643
| ML20116N643 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 05/01/1985 |
| From: | Dixon O SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| GL-84-15, NUDOCS 8505070296 | |
| Download: ML20116N643 (2) | |
Text
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SOUTH CAROLINA ELECTRIC & GAS COMPANY
' POST OFriCE 764 CotuusiA. south CARoWNA 29218
- o. w. o =ON.sn.
May 1, 1985 Vice PRESIDENT NUCLE Ah opgAATIONS o
Mr. Harold R. Denton, Director Of fice of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Updated Response to Generic Letter 84-15
Dear Mr. Denton:
In a letter to you dated September 28, 1984, South Carolina Electric & Cas Company (SCE&C) submitted a response to Generic Letter 84-15, " Proposed Staf f Actions to Improve and Maintain Diesel Generator Reliability." Included in this response was a listing of diesel generator starts and failures at the Virgil C.
Summer Nuclear Station. As a result of a recent review of the diesel generator start logs, several starts previously identified as invalid failures were determined to be valid f ailures.
The original determination of the three failures to be invalid resulted from a misinterpretation of Regulatory Guide 1.108, " Periodic Testing of Diesel Generator Units Used As Onsite Electric Power Systems at Nuclear Power Plants."
Please find enclosed as Attachment I a revised listing of the number of valid starts and failures of the A and B diesel generators.
The statements and matters set forth in this letter and its attachment are true and correct to the best of my knowledge,. Information and belief.
If you have any questions, please contact us at your convenience.
truly 36urs, A
O.
. Di r.
OWD/jez cc:
V. C. Summer C. L. Ligon (NSRC)
T. C. Nichols/0. W. Dixon, Jr.
K. C. Nodland /
E. H. Crews, Jr.
R. A. Stough W. A. Williams, Jr.
G. Percival D. A. Nauman C. W. Hehl J. N. Grace J. B. Knotts, Jr.
Group Managers NPCF
- 0. S. Bradham Flie i
gh C. A. Price
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ATTACHMENT 1 DIESEL GENERATOR A Last-100 Valid Demands *
. STARTS.
FAILURES
- 59. (through 4/29/85) 4**
Last' 20 Valid Demands STARTS FAILURES 20' 0
DIESEL GENERATOR B-Last 100 Valid Demands
- STARTS FAILURES
- 62. (through 4/29/85).
1 Last 20 Valid Demands
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STARTS
' FAILURES-
'20 0
7 1"
- w Have not had 100 valid demands to date.
i'
- - Failure #1 occurred.09/02/83, reference LER 83 108. - The Licensee experienc' d' three failures associated with High ' Jacket Water:
e -
- Temperatue on June 1, July 3, and July ll, '1984, reference LER 185-004. ' All three failures were due to. fual oil fouling of the.
L temperature control'valv'e.in the jacket water. cooling system and.the
!J Licensee-has filed a request with the Staf f- (letter from 0. ' W.
. D xon,. Jr. to H.- R. Denton dated April-9,1985) to consider these l
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- three common mode failures as-only one failure for testing -
-purposes.
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