ML20154C345
| ML20154C345 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 02/25/1986 |
| From: | Noonan V Office of Nuclear Reactor Regulation |
| To: | Farrar D COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML20154C348 | List: |
| References | |
| RTR-REGGD-01.075, RTR-REGGD-1.075 NUDOCS 8603050106 | |
| Download: ML20154C345 (5) | |
Text
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'~g UNITED STATES l
8 NUCLEAR REGULATORY COMMISSION
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t Docket Nos.:
STN 50-454, STN 50-455 and STN 50-456. STN 50-457 Mr. Dennis L. Farrar i
Director of Nuclear 1.icensing l
Comonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. Farrar:
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SUBJECT:
BYRON /BRAIDWOOD, UNITS 1 and 2. SUPPL.EMENTAl. SAFETY EVALUATION REPORT FOR PHYSICAL. IDENTIFICATION AND i
INDEPENDENCE OF REDUNDANT SAFETY-RELATED El.ECTRICAl.
i SYSTEMS The enclosed Supplemental Safety Evaluation Report addresses the appitcant's i
electrical separation criteria utilized in the design and construction of l
9yron and Braidwood Statiors.
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The NRC staff has evaluated the applicant's criteria established in the t
Byron /Braidwood Stations FSAR for separation between redundant Class IE cables and raceways.
However, the criteria for separation of non-Class IE from Class 1E cables were established at reduced distances from those specified in Regulatory Guide 1.75.
j The specific issues identified during the Construction Appraisal' Team (CAT) inspection concerning electrical separation criteria were discussed during a site visit to Braidwood Station on May 21-23, 1985. As a result of this site visit, we found it necessary to reevaluate the applicant's separation criteria of Class 1E cables from non-Class IE cables to eliminate any discrepancies and misinterpretation of the separation requirements in this area, i
The applicant justified the lesser physical separation by testing and analyzing various test configurations.
The NRC staff has evaluated the test program and results for the selected test configurations to assure that the cable arrangements tested satisfactorily represent actual plant design.
Based on our review, the NRC staff has determined that the test program and results are acceptable.
Therefore, the subject cable separation criteria have been fuund acceptable.
These lesser cable separation criteria must be specified in the Byron /Braidwood Stations FSAR.
0603050106 060223 PDH ADOCK 05000454 p
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Mr. Dennis L. Farrar i i
Another issue identified during the CAT inspection involved the applicant's use of the term " quasi safety-related." The applicant has stated that the i
term is used to identify safety-related circuits qualified to Class 1E 1
requirements which are installed in a non-Seismic Category 1 building. As i
previously discussed, this term must be defined in the Sargent and Lundy
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design criteria manual.
The enclosed evaluation will be incorporated in the next published i
Supplemental Safety Evaluation Report.
j Vincent S. Noonan, Director l
PWR Project Directorate #5 Division of PWR I.tcensing-A
Enclosure:
SSER on Cable Separation cc: See next page i
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FEB 251985 Mr. Dennis I.. Farrar Another l', sue identified durina the CAT inspection involved the applicant's use of the term " quasi safety-related." The applicant has stated that the term is used to identify safety-related circuits qualified to Class IE requirements which are installed in a non-Seismic Category 1 huilding. As previously discussed, this term murt be defined in th0 Sargent and I. undy design ciiteria manual.
The enclosed evaluation wi'l be incorporated in the next published Supplemental Safety Evaluation Report.
1 Vincent S. Noonan, Director PWR Pro.iect Directorate 85 Division of PWR I.icensino-A
Enclosure:
SSER cn Cable Separation cc:
See next paqe Distribution:
Docket File NRC PDR I.ocal PDR PD*5 Readino File T. Novak OEl.D F.. lordan R. Grimes J. Partlow l.
01shan P. Rushbrook ACRS (10)
- 5. Phow See next page concurreneis S. Treby PD45 PD*5 El.D PI. 1)!R I.01shar*
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.2 lor nan 2/24/86 2/25/86 2/70/86
- 86
FE8 !!5 W Mr. Dennis I., Farrar Another issue identified during the CAT inspection involved the applicant's use of the term " quasi safety-related." The applicant has stated that the term is used to identify safety-related circuits qualified to Class 1E requirements which are installed in a non-Seismic Category 1 building. As previously discussed, this term must be defined in the Sargent and I. undy design criteria manual.
The enclosed evaluation will be incoporated in the next published Supplemental Safety Evaluation Report.
Vincent S. Noonan, Director PWR Pro.iect Directorate #5 Division of PWR l.icensing-A
Enclosure:
SSER on Cable Separation cc: See next page Distribution:
Docket File NRC PDR I.ocal PDR PDd5 Reading File T. Novak OEl.D E. Jordan B. Grimes J. Partlow I.. Olshan M. Rushbrook ACRS (10)
S. Rhow S. Treby
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Mr. Dennis L. Farrar Byron /Braidwood Connonwealth Edison Company CC' Mr. William Kortier Dr. Bruce von Zellen Atomic Power Distribution Department of Biological Sciences Westinghouse Electric Corporation Northern Illinois University Post Office Box 355 DeKalb, Illinois 61107
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Pittsburgh, Pennsylvania 15230 Joseph Gallo, Esq.
U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale Byron / Resident Inspectors Office 1120 Connecticut Avenue, N. W.
4448 German Church Road Suite 840 Byron, Illinois 61010 Washington, D. C. 20036 C. Allen Bock, Esquire Ms. Diane Chavez Post Office Box 342 528 Gregory Street Urbana, Illinois 61820 Rockford, Illinois 61107 Thomas J. Gordon, Esquire Mrs. Phillip B. Johnson Waaler, Evans & Gordon 1907 Stratford lane 2503 S. Neil Rockford, Illinois 61107 Champaign, Illinois 61820 Ms. Bridget little Rorem Douglass Cassel, Etg.
i Appleseed Coordinator 109 N. Dearborn Street 117 North Linden Street Suite 1300 Essex, Illinois 60935 Chicago, Illinois 60602 Mr. Edward R. Crass Ms. Pat Morrison Nuclear Safeguards and licensing 5568 Thunderledge Drive Division Rockford, Illinc,is 61107 i
Sargent & Lundy Engineers 55 East Monroe Street David C. Thomas, Esq.
Chicago, Illinois 60603 77 S. Wacker Drive Chicago, Illinois 60601 U. S. Nuclear Regulatory Commission Resident Inspectors Office Elena 7. Kezelis, Esq.
RR#1, Box 79 Isham, Lincoln & Beale Braceville, Illinois 60407 Three First N.itional Plaza Suite 5200 Chicago, Illinois 60602
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