ML16341A453
| ML16341A453 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/30/1984 |
| From: | Knighton G NRC |
| To: | NRC |
| References | |
| NUDOCS 8501030047 | |
| Download: ML16341A453 (6) | |
Text
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UNITED STA les NUCLEAR REGULATORY COMMISSION WASIEINGTON, O. C. 20555 ivy/,tg 4'mv g< +~+. fz/2v/Q Docket No. 50-323 Hr. J.
O. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensinq Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Nr. Shiffer:
Subject:
Diablo Canyon, Unit 2-Ad itional In rmation on Buried Conduits Based on the staff audit of 0 tober 2
r gh 5 and November 7 and 8 regarding Diablo Canyon Unit 2.
We hav etermined at additional information is needed as listed in the enc sure.
T e 'ormation ertains to buried electric conduits and is r equired to information by Oec va ate th ign adequacy.
We request that you provide the ber 1,
198 Sincerely,
Enclosure:
As stated George W. Knighton, Chief Licensing Branch No.
3 Division of Licensing cc:
See next page
4 lt I
Enclosure Diablo Canyon Unit 2 Request for Additional Information Buried Electrical Conduits The following information is needed to evaluate the esign adequacy of buried electric conduits:
1.
Design calculations used to qualify he condu t between the pull boxes.
2.
Soil properties along the cond <t ru 3.
Mechanical properties of the cnnd 't.
5.
Mechanical characterist s of the fl ible joints used to isolate the conduit from the pu 1 foxes, incl ing spring constants for lateral and axial transl tions.
- Movements of pull boxes d
to arthquake motion.
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