ML17262A878
| ML17262A878 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/27/1992 |
| From: | Mecredy R ROCHESTER GAS & ELECTRIC CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9206110238 | |
| Download: ML17262A878 (5) | |
Text
ACCELERATED DISTRIBUTION DEMONSTPATION SYSTEM xl n,
DISTRIBUTION CODE:
IE01D COPIES RECEIVED:LTR ENCL 'IZE:
TITLE: General (50 Dkt)-Insp Rept/Notice of Vi&o ation Response REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
CESSION NBR:9206110238 DOC.DATE: 92/05/27 NOTARIZED:
NO DOCKET ¹ FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G
05000244 AUTH.NAME AUTHOR AFFILIATION MECREDY,R.C.
Rochester Gas
& Electric,Corp.
RECIP.NAME RECIPIENT AFFI'LIATION Document Control Branch (Document, Control Desk)
R
SUBJECT:
Discusses insp rept 50-244/90-10 on 900716,requesting ut verification of separation of AMSAC cable at one locatio specifically cable tray 372.
NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72).
05000244 /
A INTERNAL:
RECIPIENT ID CODE/NAME PD1-3 PD AEOD AEOD/DSP/TPAB NRR MORISSEAU,D NRR/DLPQ/LPEB10 NRR/DREP/PEPB9H NRR/PMAS/ILRB12 OE DIR REG FILh 02 COPIES LTTR ENCL 1
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1 1
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1 RECIPIENT ID CODE/NAME JOHNSON,A AEOD/DEIIB DEDRO NRR/DLPQ/LHFBPT NRR/DOEA/OEAB NRR/DST/DIR 8E2 NUDOCS-ABSTRACT OGC/HDS1 RGN1 FILE 01 COPIES LTTR ENCL 1
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NOTE TO ALL"RIDS" RECIPIENTS:
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PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
OTAL NUMBER OF COPIES REQUIRED:
LTTR 21 ENCL
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wee voRS State 89 EAST AVENUE ROCHESTER N V..14649 0001 4 ROBERT C MECREDY Vice President Cinna Nuclear Production Nay 27, 1992 TELEPHONE Ai)EACOOE Tie 546-2700 U.S. Nuclear Regulatory Commission Document Control Desk Attn:
Allen R. Johnson Project Directorate I-3 Washington, D.C.
20555
Subject:
Inspection Report No.
50-244/90-10 dated July 16, 1990 Unresolved Item No. 90-10-02 Rochester Gas and Electric Corp.
R.E. Ginna Nuclear Power Plant Docket No. 50-244 Ref.(a):
Inspection Report No. 50-244/90-26 dated January 26, 1991
Dear Mr. Johnson:
The purpose of this letter is to advise the completion of Unresolved Item 90-10-02, which requested.
"RG&E's verification of the separation of the AMSAC cable at one location in the cable run, specifically cable tray No.
- 372, a
non-safety-related tray containing AMSAC cable and cable tray No.
23, a safety-related tray,"
The 10CFR50.62 (ATWS) rule and our AMSAC modification Design Criteria (EWR 4230) required that a means be provided that is both diverse and independent from the existing Reactor Protection System for tripping the main steam turbine and initiating auxiliary feedwater flow following an ATWS event.
Design Analysis, "Electrical Separation AMSAC, EWR 4230, Rev. 0, approved 1/20/89,"
concluded that AMSAC circuits are physically separated.
from Reactor Protection System circuitry.
During the 1992 Refueling Outage a field verification was performed to obtain any additional data regarding the AMSAC cable separation at the location noted in the inspection report.
Subsequent to the results of the field verification, Electrical Engineering Circuit Schedules were again reviewed for the cable trays involved with AMSAC.
The combined results reconfirmed that the required separation exists.
The Design Analysis above is being revised to reflect the additional data obtained during the field verification, however,
'Id( its revision will not affect the conclusions regarding cable separation.
Section 3.18 of reference (a) noted that circuit separations
)
()
Engineering Work Request (EWR) 4885 was initiated and is presentlyy
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ongoing.
While that work request is related, generically to circuit separations at Ginna Station, it represents a significant positive
- action, and its schedule and completion is not essential to the completion of the subject unresolved item.
The scope of work under
,EWR 4885 involves the circuit separation evaluation of safety-related circuits only, not the routings of'll electrical field cables as noted in reference (a).
Very truly yours, GAH/223 Robert C.
Mec edy r
xc: Mr. Allen R. Johnson (Mail Stop 14D1)
Project Directorate I-3 Washington, D.C.
20555 U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 Ginna Senior Resident Inspector