ML20132C638
| ML20132C638 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, 05000000 |
| Issue date: | 12/26/1984 |
| From: | Lear G Office of Nuclear Reactor Regulation |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20132C642 | List: |
| References | |
| FOIA-85-161 NUDOCS 8501100018 | |
| Download: ML20132C638 (2) | |
Text
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MEMORANDUM FOR:
B. J. Youngblood, Chief Licensing Branch No. 1 Di ision of Licensing i
FROM:
George Lear, Chief Structural and Geotechnical Engineering Branch Division of Engineering
SUBJECT:
FSAR REVISION RELATED TO STRUCTURAL STEEL WELDING
Reference:
Letter from B..J. Youngblood to B. D. Liaw, dated December 13, 1984.
A In accordance with your request contained in the referenced memos the structural and Geotechnical Engineering Branch has reviewed the information contained in the attachments to the referenced memo, and our safety evaluation report is contained in the enclosure. The review is performed by C. P. Tan of Structural Engineering S ction B of SGEB.
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W George u r, Chief Structural and Geotechnical EngineeMng Branch Division of Engineering
Enclosure:
As stated cc:
J. Knight T. Novak
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B. Liaw P. Kuo C. Tan CONTACT:
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1 ENCLOSURE STRUCTURAL AND GE0 TECHNICAL ENGINEERING BRANCH SUPPLEMENT TO SER WOLF CREEK NUCLEAR PLANT DOCKET NO. 50-482 3.8.3 Other Seismfc Category I Structures The applicant proposed an addition to Section 3.8.3.6.3.3 of the SNUPPS FSAR in forthcoming revision which is applicable to Wolf Creek, as follows:
A "2) Fillet welds need not satisfy the convexity limitations of Section 3.6.1 provided that all other parameters of acceptable weld profile are maintained."
The applicant justified the change on the basis that convexity has detrimental effect on the structural capacity of the weld if no other weld parameters are maintained. The staff has reviewed the change and has the following observation It is well known that a e
convex fillet weld has less tendency to crack as a result of shrinking While cooling, and it is relatively free from undercut.
Even though it may result in excess weld metal, it will not affect the allowable strength of weld determined on the basis of the weld leg size.
As a result of the above observation, the staff concluded that the proposed change to the SNUPPS FSAR Section 3.8.3.6.3.3, applicable to Wolf Creek, is acceptable.
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