ML20209D728
| ML20209D728 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Diablo Canyon |
| Issue date: | 01/03/1985 |
| From: | Lear G Office of Nuclear Reactor Regulation |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML082410749 | List:
|
| References | |
| FOIA-86-197 NUDOCS 8501100235 | |
| Download: ML20209D728 (2) | |
Text
I Te 8
i UNITED STATES
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8 NUCLEAR REGULATORY COMMISSION 5
E WASHINGTON, D. C. 20555 s,
j JAN 0 31995 Docket No. 50-323 MEMORANDUM FOR:
Division of Licensing FROM:
George Lear, Chief Structural and Geotechnical Engineering Branch Division of Engineering
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON SMALL BORE PIPING LOADS ON CIVIL STRUCTURES FOR DIABLO CANYON UNIT 2 Attached are three questions pertaining to the review of small bore piping loads on to civil structures. The response to these questions is required by January 11, 1985 in order to maintain the current SSER schedule.
/
eorge Lear, Chief
, Structural and Geotechni 1 Engineering Branch Division of Engineering
Attachment:
As stated cc:
J. Knight H. Shierling P. Kuo M. Hartzman H. Polk d
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e SGEB QUESTIONS ON WESTINGHOUSE DOCUMENT CD-107 1.
Explain the procedures used to incorporate the Westinghouse small bore piping footprint loads into the design of the civil structures.
Include in the explanation how the interface coordination and control between Westinghouse and the Diablo Canyon project were performed.
Include a copy of the procedures in your response.
2.
Explain the reason for the changes in the Westinghouse document CD-107 from revision 5 to revision 7 in the small bore criteria summary, section 4.8.
3.
Provide the rationale used to develop the criteria where a footprint load of 500 lbs or less attached to main structural members of the annulus does not have to be routed to the DCP Civil Department for review.
Include the definition of main structural members in your response.
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