ML20052H660
| ML20052H660 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 04/28/1982 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8205210314 | |
| Download: ML20052H660 (2) | |
Text
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'h SouTf6CARCtlNA El.ECTRic 8 GAS COMPANY Post OFFICE 754 cmg.,
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Weg P.ts Dant amo Geoup DtcuYws April 28, 1982 w a..o,....
Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Caanission Region II, Suite 3100 101 Marietta Street, N.W.
Atlanta, GA 30303
Subject:
Virgil C. Stumer Nuclear Station Docket No. 55/395 Reportable Substantial Safety Hazard Violation of Separation Criteria NE File:
3.1051
Dear Mr. O'Reilly:
On April 23, 1982, a substantial safety hazard as defined by 10CFR21 was reported to Mr. John Rogge at the NFC Region II office. The iten involves the architect-engineer's inadequate specification of separation criteria for non-safety related space heater circuits servirg safety relatal motors and safety related switchgear. Details are given on the attachnnnt. This item is beiry reportal under our 10CFR 50.55(e) procedure.
This letter serves as a final report. If you have any questions, please let us kncv.
Ve tru y yours, j
-c
/
T. C. NicMls, Jr.
Olh1LN:tdh cc:
V. C. Sumner C. L. Ligon (NSRC)
T. C. Nichols, Jr.
G. J. Braddick G. H. Fischer J. L. Skolds H. N. Cyrus J. B. Knotts, Jr.
H. T. Babb B. A. Bursey D. A. Nauman J. C. Ruoff M. B. hhitaker, Jr.
I&E (Washington)
W. A. Williams, Jr.
Document Management Branch O. S. Bradham
- (55e,21, IER caly)
R. B. Clary NPCF M. N. Browne File A. R. Koon H. Radin g
O. W. Dixon, Jr.
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8205210314 820428 PDR ADOCK 05000395 S
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100R21 - SUBSTANTIAL SAFETY HAZARD 1.
Name and Address of Reporting Individual Danny Hicks South Carolina Electric and Gas Ccrpany P. O. Box 764 Colunbla, SC 29218 2.
Identification of Basic Conponent Ncn-safety related space heater circuits serving safety related notors and switchgear.
3.
Identification of Firm Supplying Cmponent Non-applicable 4.
Nature of Defect, Substantial Safety Hazard Created, and Evaluation Durig recent field inspections, it was discovered that non-safety related space heater circuits serving various safety related switchgear and notors were in violation of the plant's designed separaticn criteria between non-safety related and safety related circuits. These inspections prcnpted the architect-engineer to review the non-safety related space heater circuits for separation violations. 'Ihis review along with subsequent inspections uncovered various separation violations involvirg the space heater circuits. Since the space heaters are being powered frcm non-safety related sources protecte1 only by molded case breakers, a short circuit could result in danaging safety related equipment and conpanents required to mitigate accidents or essential to brity the reactor to a safe shutdown.
5.
Date Information of Defect Was Obtained
- January 26, 1982 6.
Number and Iocation of Defect Switchgear - 10 space heater circuits Motors
- 11 space heater circuits 7.
Corrective Action The architect-mgineer has revised the drawings to add Class lE overcurrent fuses to the space heater circuits found in violation of the plant's design i
electrical circuit physical separation criteria. Field personnel are adding the Class lE overcurrent fuses to these space heater circuits per the revised drawings.
8.
Advice to Purchase or Licensees Ncne