ML20134D946
| ML20134D946 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/08/1985 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| (RDC-143(85)), PY-CEI-OIE-0093, NUDOCS 8508190478 | |
| Download: ML20134D946 (2) | |
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1 f THE CLEVELAND ELECTRIC P.O. BOX $000 - CLEVELAND, OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMINATING OLOG - 55 PUBLIC SQUARE Serving The Best Location in the Nation l
MURRAY R. EDELMAN vice mesiotur August 8, 1985 NUCUAR PY-CEI/OIE 0093 L Mr. James G. Keppler
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Regional Administrator, Region III l
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Divisional Separation Requirements for the Neutron Monitoring System [RDC 143(85)]
Dear Mr. Keppler:
This letter is an interim report pursuant to 10CPR50.55(e) con-cerning divisional separation requirements for the Neutron Monitoring (C51) System.
This item was reported by telephone to Mr. J. McCormick-Barger of your office on July 10, 1985, by Mr.
E. Riley of The Cleveland Electric Illuminating Company (CEI).
This item is being evaluated par Deviation Analysis Report No.
248.
Description of Potential Deficiency
/
The power supply to the Neutron Monitoring (C51) System was changed to the Anticipated Transient Without Scram, Uninterrup-table Power Supply (ATWS UPS) using 120V AC vital inverters (R14 Systems).
Since the C51 System has four divisions, R14 was split into four divisions.
A note was added to the elementary diagram (B-208-038, sh. B01) to maintain separation from the Reactor Protection System (RPS) cables.
In some instances this require-ment was not carried through to the wire list or in the field.
Also, there was no requirement to maintain separation for ATWS UPS power from Engineered Safety Features (ESP) divisional power.
Because of this, Division 3 ATWS UPS (fed from ESP, Division 1) cables are routed with ESP Division 3 cables.
This could be a violation of the Divisional Separation Requirements of Regulatory Guide 1.75.
850819o478 850Bds DR ADOCK 05000440 PDR i 0 AUG 121985 Z@?
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Mr. Jcmes G. K2ppler August 8, 1985 PY-CEI/OIE 9993 L Status of Evaluation General Electric is currently evaluating this potential deficiency.
We will file our next report upon receipt of this evaluation.
If you have any questions, please call.
Sincerel,
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Murray R. Edelman Vice President Nuclear Group cc:
J. A. Grobe USNRC Site Office SBB59 D. E. Keating USNRC Site Office SBB59 Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.
29555 Records Center, SEE-IN Institute of Nuclear Power Operations 1199 Circle 75 Parkway, Suiteil599 Atlanta, Georgia 33939 w-
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