ML13330B447
| ML13330B447 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/29/1988 |
| From: | Medford M Southern California Edison Co |
| To: | NRC Office of Administration & Resources Management (ARM) |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097, TASK-06-07.C2, TASK-6-7.C2, TASK-RR NUDOCS 8901040193 | |
| Download: ML13330B447 (2) | |
Text
ACCELERATED DISTRIBUTION DEMONSTRAION SYSTEM REGULATOR*NFORMATION DISTRIBUTION EM (RIDS)
ACCESSION NBR:8901040193 DOC.DATE: 88/12/29 NOTARIZED: NO DOCKET #
FACIL:50-206-San Onofre Nuclear Station, Unit 1, Southern Californ 05000206 AUTH.NAME AUTHOR AFFILIATION MEDFORD,M.O.
Southern California Edison Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Advises that response to NRC 881014 request for addl info re conformance to Reg Guide 1.97,Rev -2 expected by 890217.
R DISTRIBUTION CODE: A003D COPIES RECEIVED:LTR /- ENCL 0 SIZE:
I TITLE: OR/Licensing Submittal: Suppl 1 to NUREG-0737(Generic Ltr 82-33)
D NOTES:License Exp date in accordance with 10CFR2,2.109.
05000206 S
RECIPIENT COPIES RECIPIENT COPIES
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ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1
PD5 PD 7
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D INTERNAL: ARM/DAF/LFMB 1
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D RES/DSIR/EIB 1
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BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 M. O.MEDFORD TELEPHONE MANAGER OF (818) 302-1749 NUCLEAR REGULATORY AFFAIRS December 29, 1988 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen:
Subject:
Docket No. 50-206 Conformance to Regulatory Guide 1.97, Revision 2 San Onofre Nuclear Generating Station Unit 1 By letter dated October 14, 1988 you requested additional information relating to certain issues in SCE's submittals on Regulatory Guide 1.97, Revision 2 (R.G. 1.97).
Specifically, SCE's submittals contained recommendations from our contractor to implement plant modifications for several accident monitoring channels to provide conformance with the criteria of R.G. 1.97.
These recommendations included upgrading power cables to provide separation, environmental qualification, and installation of redundant instrumentation.
SCE's contractor identified several instances where separation of the cabling associated with a given instrument loop was not adequate and recommended upgrade of the instruments' power cable. As part of SEP Topic Vl-7.C.2, Failure Mode Analysis, SCE is currently evaluating the separation of power supplies and cabling associated with the D.C. Bus, Vital Buses and Regulated Buses.
The resolution of these efforts may impact our contractor's recommendations. Therefore, SCE will coordinate the response to your October 14, 1988 letter with this evaluation. SCE will provide to the NRC by February 17, 1989 more.details regarding these efforts and a schedule for completion.
If you have any questions or require additional information, please let me know.
Very truly yours, cc: 3. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 8901040193 881229 PDR ADOCK 05000206 P
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