ML20052H757
| ML20052H757 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 05/03/1982 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82-641-000 PT21-82-641, PT21-82-641-000, NUDOCS 8205210412 | |
| Download: ML20052H757 (4) | |
Text
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SOUTH CAROLINA ELECTRIC a. Gds /CJQt@ANY.
b ]fj Post ornce aox re ' # I 4 ff f
bSO3f 7, CotuMaiA, SoutN CAROLINA 29218 i
T. C. Nicuo ts, Ja.
79 May 3,19s2/fjjy 7 w e p=..
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Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Omnission Region II, Suite 3100 101 Marietta Street, N. W.
Atlanta, Georgia 30303
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Substantial Safety Hazard Diesel Generator I&E Open Item 81-29-01
Dear Mr. O'Reilly:
On September 16, 1981, Mr. Virgil Brownlee of NRC Region II was notified of a substantial safety hazard under 10CFR21 concerning the Diesel Generator. An interim 30 day report was written on September 18,1%1.
The information shown on the attachment to this letter serves as the final report.
I[you have any questions, please alvise.
Very truly yr zs, f
h 9
/
a T. C. Nichols, Jr.
WDS:'KN:glb Attachment cc:
Page Two l
OFFICIAL COPY 8205210412 820503 DR ADOCK 05000 3.
/'
' /'
Mr. James P. O'Reilly May 3, 19G2 Page Two cc:
V. C. Sunmer w/o att.
G. H. Fischer w/o att.
H. N. Cyrus T. C. Nichols, Jr. w/o att.
M. B. Whitaker Jr.
O. W. Dixon, Jr.
H. T. Rahh D. A. Nauman W. A. Williams, Jr.
R. B. Clary O. S. Bradh z A. R. Koon Site QA H. Radin M. N. Browne H. I. Donnelly G. J. Braddick B. A. Bursey 1
J. C. Ruoff J. K. Skolds C. L. Ligon (NSRC)
J. B. Knotts, Jr.
I&E (Washington)
Docment Managenent Branch (55e, 21, LER only)
NPCF File 2
4 10CER21 - SUBSTANrIAL SAFETY HAZARD 1.
Name and Address of Reporting Individual Wayne D. Stuart South Carolina Fllectric and Gas Ompany P. O. Box 764 Columbia, South Carolina 29218 2.
Identification of Basic Component Diesel Generators XEG-1A-DG XEG-1B -DG 3.
Identification of Firm Supplying Camponent Colt Industries Fairbanks !brse Engine Division 4.
Nature of Defect, Substantial Safety Hazard Created, and Evaluated The diesel generators are required to start fran normal ambient standby condition and be ready for loading in less than or equal to 10 seconds.
This standby time is rcquired to provide power to campnents of the Engineered Safety Fbatures Systs.
After several days without operation, the diesel starting time is greater than 10 seconds with subsequent starts less than 10 seconds. The problem is attributed to fuel oil header drain down.
5.
Date Information of Defect Was Obtained August 5,1981 6.
Number and Location of Defect Diesel Generators XEG-1A-DG XEG-1B-DG l
7.
Corrective Action l
Colt Industries has provided South Carolina Electric and Gas Company with a modification to the fuel system to prevent fuel header drain down. This l
modification mnsisted of check valves in the fuel oil supply and return t
lines.
It also consisted of an atmospheric vent on the fuel system i
l l
1
r-accmulator tank to allow contraction of the fuel after engine shutdown.
This modification has been installed and subsequent repeated cold starts of both diesels have resulted in start times of less than 10 seconds.
8.
Advice to Purchaser or Licensee None i
f i
i i
1
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