ML19345B737
| ML19345B737 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 11/21/1980 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8012020442 | |
| Download: ML19345B737 (2) | |
Text
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SOUTH CAROLINA ELECTRIC a GAS COMPANY
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November 21, 1980 e
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'Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II, Suite 3100 t
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101.Marietta Street, N. W.
Atlanta,-Georgia 30303 Sub'j ect: Virgil C. Summer' Nuclear Station j-Reportable Significant Deficiency i
10CFR50.55(e) i Docket No. 50/395'
Dear Mr.-O'Reilly:
.On 11/21/80, a significant deficiency as defined by 10CFR50.55(e) was reported to Mr. John' K.. Rausch at the NRC Region II office. The item involved i
the-failure to insulate base instrument cable drain wire splices in penetrations as required by the design guidelines.
Details are given on the attachment.
The item is being reported'under our 10CFR50.55(e) procedure. This is considered a final report on the matter.
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Very truly yours,
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T. C. Nichols, Jr.
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C.- Summer G.-'H.
Fischer l
T. C..Nichols, Jr.
E..H. Crews, Jr.
O.-S.-Bradham D. A. Nauman 1
- 0. W. Dixon, Jr.-
2 R. B. Clary W. A. Williams, Jr.
'B..A. Bursey
.J. L.'Skolds'
?J. B. Knotts, Jr.
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H. E. Yocom.
4 ISE (Washington).
Document Management Branch /
NPCF/Whitaker File >
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10CFR50.55(e) - SIGNIFICANT DEFICIENCY 1.
Identification of Nonconformance Splices were made to base drain wires in instrumentation cables at the penetrations without insulating the drain wires. This was done based on the penetration instruction manual. The Construction Guidelines for Cable Instel.lation specify that the drains be insulated. This item was identified by nonconformance notice 1227E dated 7/17/80.
2.
Number and Location of Nonconformance Cables in 13 penetrations were involved. Seven of the penetrations were safety related.
3.
Significant Deficiency Created and Evaluation The uninsulated drain wires could have shorted to each other, possibly creating circulating ground currents, which could create noise in the instru-mentation cable. The noise could create problems in the protection system logic.
4.
Corrective Action The penetrations have been removed and the drain wires have been taped.
Electrical personnel have been re-instructed that the Construction Guidelines for Cable Installation must be followed.