ML19316A509
| ML19316A509 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/12/1976 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19316A510 | List: |
| References | |
| NUDOCS 7912300033 | |
| Download: ML19316A509 (1) | |
Text
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w Robert L. Tedesco, Assistant Director for Plant Systems, DSS DR. IIANAUER'S MEMO ON 'IIIE DUKE 6 PACK SER (TIEM 2)
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Our SER Section 8.2.2 addresses, in part, the routing of cables to remote structures in a single trench. 'Ihe applicant has proposed 1.
to use the separation criteria of Regulatory Guide 1.75 (as dis-cussed in Section 8.4 of our SER) including a 3' horizontal separa-tion between redundant division or suitable barriers. The applicant's 8.3.1.2.6.8 discussion of fire protection and detection (Section of the SAR) also proposed the use of fire stops and seals (of a fire rating equal to the wall or floor being penetrated) at fire barrier penetrations and sta,ced thst "All cables, except a few non-Class 1E inst rumente. tion and control cables a*e of interlocked armor type, with a fire retardant jacket and will not propogate fire to another area, or add to severity of the fire."
1 Ordinarily, we would require the use of redundant cable trench 5s liowever, the applicant 5 past applications of armored 2.
or tunnels.
cable (e.g., Oconeo)has demonstrated that his cables can withstand It is on the exposure to severe fires and continue to function. basis of this expe
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above that we have concluded that a safe design will be implemented.
Original signed by T. A. Ippolito Thonas A. Ippolito, Chief Electrical, Instrumentation and Control Systems Branch Division of Systems Safety
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S. Hanauer J. Glynn R. Scholl
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