ML16340A313
| ML16340A313 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/08/1978 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Morrissey J PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7812180394 | |
| Download: ML16340A313 (10) | |
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NRC PDR Local PDR DEg B ~g7(.HR 1 File R.
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Boyd Ross D. B. Vassallo F. J. Williams J. Stolz D. Allison E. Hylton R. h1attson J.
P. Knight R. Tedesco R;
DeYoung Y. A. h!oore R.
H. Vollmer N. L. Ernst
Dear th. htorrissey:
R p
Denise
SUBJECT:
REOUEST FOR ADDITIONAL IHFORIUITfg - BOLTEO CONNECTIONS IN LINEAR SUPPORTS, DIABLO CANYON, UNITS l 4 2 bcc:,
J.
R. Buchanan, hISIC T. B. Abernathy, TIC ACRS (16)
Docket Nos-50-275 and 60-323
'r.
John C. Norrissey Vice President, 5 General Counsel
,Pacific Gas 8 Electric ComIpany 77 Beale Street'an Francisco, California 94106 He have recently developed a generic question about the design of sorIIe piping system support base plates.
The issue is whether or not the support plate flexibilitywas properly taken into account in determining the maximum load that would be applied to the support bolts under seismic loading.
Lack of accounting for support plate flexibilitycould lead to underestimation of the support bolt loads.
Please let us know your schedule Wor providing your response.
Contact us if you have any questions.
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Sincerely, i signpd bx OrigiII0 gpbn 1. Stipix John F. Stolz, Chief Light Hater Reactors Branch No.
1 Division of Project Management
Enclosure:
Request for Additional Information cc:
See paqe 2 The information that we need is described in the enclosur'e which is our standard request for information.
You should provide your response as quickly as possible.
He believe that the significance of this matter for Diablo Canyon must be evaluated by the fLRC staff prior to the issuance of operating licenses.
LIIR 'I LWR 1
OFFICE&
BURNAMEW DATE~
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NRC FORM 318 (9 76) NRCM 0240
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Mr. John C. Morrissey CC:
Mr. John Marrs Managing Editor San Luis Obispo County Telegram - Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, Cal.ifornia 93406 Philip A. Crane, Jr.,
Esq.
Pacific Gas
& Electric Company 77 Beale Street San Francisco, California 94106 Janice E. Kerr, Esq.
California Public Utilities Coranission 350 NcAllister Street San Francisco, California 94102 Nr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.
4623 Nore Mesa Drive Santa Barbara, California 93105 Ns. Elizabeth E. Apfelberg 1415 Cazadero San Luis Obispo, California 93401 Ms. Sandra A. Silver 1792 Conejo Avenue San Luis Obispo, California 93401 Nr. Gordon A. Silver 1792 Conejo Avenue San Luis Obispo, California 93401 Paul C. Valentine, Esq.
321 Lytton Avenue Palo Alto, California 94302 Yale I. Jones, Esq.
19th Floor 100" Van Ness Avenue San Francisco, California 94102 Alan S. Rosentha1, E sq..
Atomic Safety
& Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Elizabeth S. Bowers, Esq.,
Chairman Atomic Safety
& Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Hr. Gl enn 0. Bright Atomic Safety 8 Licensing Board U. S. Nuclear Regulatory Cooeission Washington, D. C.,
20555 Tolbert Young P. 0. Box 219 Avila Beach, California 93424 Richard S. Salzman, Esq.,
Chairman Atomic Safety 8 Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr.
W. Reed Johnson Atomic Safety
& Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Mr. Richard Hubbard NHB Technical Associates 366 California Avenue Palo Alto, California 94306
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Mr..John C. Morrissey cc:
Ms. Raye Fleming 1746 Chorro Street San Luis Obispo,-California 93401 Brent Rushforth, Esq.
Center for Law in the Public Interest 10203 Santa Monica Boulevard Los Angeles, California 90067 Arthur C. Gehr, Esq.
Snell 8 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. James
- 0. Schuyler, Project Engineer Pacific Gas 8 Electric Company 77 Beale'Street San Francisco, California 94106 Bruce Norton, Esq.
3216 North 3rd Street Suite 202 Phoenix, Arizona 85012 Mr.
W. C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 Michael R. Klein, Esq.
Wilmer, Cutler 8 Pickering 1666 K Street, N.
W.
Washington, 0. C.
20006 David F. Fleischaker, Esq.
1025 15th Street, N.
W.
5th Floor Washington, D. C.
20005 Dr. William E. Martin Senior Ecologist Battelle Memorial Institute
- Columbus, Ohio 43201
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ENCLOSURE REQUEST FOR ADDITIONAL INFORtQTION 110.
t1ECHANICAL ENGINEERING BRANCH Appendix XVII-2461.1 of the ASME Code Section III requires that bolt loads in bolted connections for linear component supports include prying effects due to the flexibilityof the connection.
- 1.
Provide confirmation that the loads in bolted connections for linear component supports were determined by considering the deformation of the connection and tension-shear interaction for the bolts.
For connections of supports which are anchored to a concrete structures provide in addition:
a.
The type of anchor bolt.
b.
The factors of safety (and.their bases) against pullout under static, repeated and transient loading.
This information should include representative diagrams of the connections, material properties, and interaction diagrams, the analytical techniques and models used, and the maximum
- Similar requirements for structural joints are also stated in the AISC manual of Steel Construction, 1970 Edition for plants in which support design predates Subsection NF of Section III of the AS)1E Code.
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stresses in the bolts and the connections under both static,
- repeated, and transient type loading.
- 2. If any connection was assumed to be rigid, provide complete analytical or experimental justification for this assumption.
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