ML20054L869
| ML20054L869 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 06/29/1982 |
| From: | Dixon O 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 8207090022 | |
| Download: ML20054L869 (3) | |
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SOUTH C AROLIN A ELECCTRIC &' GMS, COMPANY f - l,
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Cotuadusa. SouvH CanoLINA 29218
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Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Cmimission Regicn II, Suite 3100 101 Marietta Street, N.W.
Atlanta, GA 30303
Subject:
Virgil C. Sumner Nuclear Station Docket No. 50/395 Reportable Substantial Safety Hazard Deficiency with 7.2 KV Switchgear's Anti-Punp Relay N. E. File:
3.1051
Dear Mr. O'Reilly:
On Jtne 23, 1982, a substantial safety hazard as defined by 10CFR21 was reportal to Mr. Hugh Dance at the NIC Regian II office. The item involves the potential electrical shorting of uninsulated leads in the anti punp relay used in the 7.2 KV switchgear. Details are given cn the attachment. This item is being reported under our 10CFR50.55(e) procedure.
This letter serves as a final report. If you have any questions, please let us know.
Very truly yours, i
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O. W. D xcn, J.
DI:OWD:tdh cc:
V. C. Sumner A. R. Kcnn T. C. Nichols, Jr.
H. Radin G. H. Fischer Site Q. A.
O. W. Dixcn, Jr.
C. L. Ligcn (NSBC)
H. N. Cyrus G. J. Braddick H. T. Babb J. L. Skolds D. A. Naunan J. B. Knotts, Jr.
M. B. Whitaker, Jr.
B. A. Bursey W. A. Williams, Jr.
I&E (Washington)
O. S. Bradham Document Management Branch R. B. Clary
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M. N. Brcune NPCF r10@, CON -
File ve l$07$00fO!b M b 2[
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- 3 100R21 - SUBSTANr1AL SAFETfY HAZARD 1.
Name and Address of Reporting Individual Danny Hicks South Carolina Electric and Gas Conpany P. O. Box 764 Columbia, SC 29218 2.
Identification of Basic Conponent 7.2 KV Switchgear's Anti-Pump Relay 3.
Identification of Firm Supplying Conponent r
Nature of Defect, Substantial Safety Hazard Created, and Evaluation South Carolina Electric and Gas was notified of a possible defect in the 7.2 KV switchgear's anti-punp relay by the manufacturer. The affected switchgear was manufactured during the period from 1976 through mid 1981. We flexible leads connected to the anti-punp relay's moveable contacts were stripped excessively. This condition left the flexible leads uninsulated length long enough to possibly reach an adjacent coil creating an electrical short circuit. Since the anti-punp relay is part of the switchgear's close circuit, the affected switchgear could have been rendered inoperable. We manufacturer has reported this problem to the Nuclear Regulatory Cm mission.
South Carolina Electric and Gas has not experienced any anti-punp relay failures.
5.
Date Information of Defect Was Obtained -
December 10, 1981 6.
Number and Iocation of Defect Switchgear # XOWlDA - Unit 3 Switchgear # XSWlDB - Unit's 4, 5, 9, 13, 14, 16, 18, and 19 Switchgear # XSWlEA - Unit 4
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7.
Corrective Action The 7.2 KV switchgear manufactured during the period frcan 1976 through mid 1981 was identified from the manufacturer's date code.
h identified switchgear's anti-punp relay was checked for excessive uninsulated flexible leads, h anti-punp relays found with excessive uninsulted leads were re-insulated per the manufacturer's service bulletin.
8.
Advice to Purchasers or Licensees None