ML20002E204
| ML20002E204 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 01/16/1981 |
| 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 8101260643 | |
| Download: ML20002E204 (3) | |
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t SOUTH CAROLINA ELECTRIC a GAS COMPANY CotuusA, SOUTH CARoWNA 29218 l
T. c. NicMots, JR.
January 16, 1981 Met Persicret ano Geove CasevTvws Nuctsae Cerentens 1
l Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II, Suite 3100 101 Marietta Street, N.W.
Atlanta, Georgia 30303 i
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Reportable Substantial Safety Hazard Violation of Westinghouse Separation i
Criteria NE File 3.1051 4
Dear Mr. O'Reilly:
On Tanuary 16, 1980, a substantial safety hazard as defined by 10CFR21 was reported to Mr. John Rausch at the NRC Region II Office. The item in-volved an architect-engineer approved variance allowing protection grade input circuits to be run in the plant Class lE tray systems in the Reactor Building. These tray systems contain control grade circuits as well as other miscellaneous safety related and safety associated circuits.
1 The variance is in conflict with the Westinghouse 7300 series process control system Noise Tests (WCAP-8892A) requirement for separation of field run protection and control circuits. Details are given on the attachment.
l The item is being reported under our 10CFR50.55(e) procedure. This is considered a final report on the matter.
Very truly yours, i
T. C. Nichols, Jr.
JAW:TCN:glb Attachment k
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Mr. Jameo P. O'Reilly January 16, 1981 Page ho cc:
B. A. Bursey V. C. Summer-G. H. Fischer W. A. Williams, Jr.
T. C. Nichols, Jr.
E. H. Crews, Jr.
D. A. Nauman O. S. Bradham O. W. Dixon, Jr.
J. B. Knotts, Jr.
R. B. Clary A.-R.
Koon A. A. Smith J. L. Skolds I&E (Washington)
Document Management Branch (55e/21/LER Only)
H. E. Yocum NPCF/Whitaker File 1
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6-ATTACHMENT I 10CFR21 - SUBSTANTIAL SAFETY HAZARD 1.
Name and Address of Reporting Individual
' James A. Wactor South Carolina Electric & Gas Company I
P. O. Box 764 Columbia, South Carolina -29218 l
2.
Identification of' Basic Component Engineering Design of Instrumentation Circuits 3.
Identification of Firm Supplying Component.
Gilbert Associates, Inc.
P. O. Box 1498 Reading, PA 19603 4.
Nature of Defect, Substantial Safety Hazard Created, and Evaluation A Gilbert Associates, Inc. (GAI) Engineering approved variance allowed pro-tection grade input circuits to be run in the plant Class lE tray systems in the Reactor Building. These tray systems contain control grade circuits as well as other miscellaneous safety related and safety associated circuits.
The variance is in conflict with the Westinghouse 7300 series process control system Noise Tests (WCAP-8892A) requirement for separation of field run pro-tection and control circuits.'.
As a result, noise could be induced on these circuits that could cause a malfunction in the logic of the solid state protection system.
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Date Information of Defect Was Obtained January 7, 1981 6.
Number and Location of Defect There were 34 circuits routed in cable trays in the reactor building.
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Corrective Action The circuits are being rerouted in conduit.
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Advice to Purchasers or Licensees None.
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