ML17053D145
| ML17053D145 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 04/22/1982 |
| From: | Vassallo D Office of Nuclear Reactor Regulation |
| To: | Dise D NIAGARA MOHAWK POWER CORP. |
| References | |
| REF-SSINS-6820 IEB-80-11, NUDOCS 8205060572 | |
| Download: ML17053D145 (10) | |
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Distribution:
Docket Fil e J.
Hel temes I &E LPDR S. Norris ORB¹2 Rdg OELD D. Eisenhut Gray NRC PDR ACRS-10 NSIC P.
Pol k Docket No. 50-220 April 22, 1982 ter. Donald P. Disc Vice President - Engineering c/o tliss Catherine R. Seibert Niagara tiohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202
Dear Nr. Disc:
Re:
Nine Mile Point Nuclear Station, Unit No.
1 Me have reviewed your responses to IE Bulletin 80-11 "Masonry Mall Design" and find that we need additional information to complete the review.
You are requested to provide the additional information, listed in the enclosure, within 45 days of receipt of this letter.
The information requested in this letter affects fewer than ten respondents; therefore, ONB clearance is not required under P.L.96-511.
Sincerely,
Enclosure:
Request for Additional Information 8riginai signed by
'D B. Vassal le Domenic B. Vassallo.
Chief Operating Reactors Branch ¹2 Division of Licensing cc w/enclosure See next page 8205060572 820422 PDR ADOCK 05000220 8
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NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USQPO: 1981~960
0 1
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Mr. Donald P; Disc cc:
Leonard M. Trosten, Esq.
- LeBoeuf, Lamb, Leiby 8
MacRae 1333 New Hampshire
- Avenue, N.
W.
Suite 1100 Washington, D.
C.
20036 State University College at Oswego Penfield Library - Documents
- Oswego, New York 13126 Resident Inspector c/o U.S.
NRC P.O.
Box 126
- Lycoming, New York 13093 Carl D. Hobelman, Esq.
- LeBoeuf, Lamb, Leiby 8 MacRae 1333 New Hampshire
- Avenue, N.W.
Suite 1100 Washington, D.C.
20036 Ronald C.
Haynes Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
Request for Additional Informtion Nine Mile Point Nuclear Station, Unit No.
1 Docket No. 50-220 1.
Provide and justify the boundary conditions and modeling techniques used for the reevaluation of masonry walls at the Nine Mile Point plant and indicate how 'the potential for block pull-out was considered.
2.
Indicate how earthquake forces in three directions and equipment loads were considered in the analysis.
Using sample calculations, indicate how the effects of higher modes of vibration are included in the analysis.
Provide the damping values used and justify any deviation from the SEB criteria [4].
3.
Provide a brief description and sample calculations to show the analytical approach used for. single wythe and multiple wythe walls.
4.
Provide and justify the increase factors used in the criteria for allowable stresses.
The SEB criteria [4] allow no increase in the allowable stresses for load combinations including wind or operating basis earthquake (OBE) loads.
The allowable working stresses for load conditions which represent abnormal/severe and abnormal/extreme environmental conditions such as a design basis earthquake (DBE) may be multiplied by factors shown in the table in the SEB criteria [4]
which are given below:
e of Stress Factor Axial or flexural compression Bearing Reinforcement stress except shear Shear reinforcement and/or bolts Masonry tension parallel to bed joint Shear carried by masonry 2.5 2.5 2.0 but not to exceed 0.9 fy 1.5 1.5 1.3 Masonry tension perpendicular to bed joint
-for reinforced masonry
<<for unreinforced masonry 0
1.3
5.
Provide sketches of the proposed wall modifications
[3] and indicate, using sample calculations, how these modifications will correct the wall deficiencies.
Indicate the out-of-plane drift effects of the bracing added to walls 31, 44, 45, 59, and 66 as stated in Reference 3 ~
6.
Provide the status of the proposed wall modifications.
7.
Provide the results of the analysis of all masonry walls in terms of actual stresses versus allowable stresses.
REFERENCES 1.
Masonry Wall Design NRC, 08-May-80 IE Bulletin 80-11 2.
T. E.
Lempges Letter to B. H. Grier, NRC.
Subject:
Nine Mile Point Unit 1 - IE Bulletin 80-11;
Response
to Items 1, 2a and 3
Niagara Mohawk Power Corporation, 08-Jul-80 3.
T. E.
Lempges Letter to B.
H. Grier, NRC.
Subject:
Nine Mile Point Unit 1 - IE Bulletin 80-11, Item 2b - Re-evaluation of Masonry Walls Niagara Mohawk Power Corporation, 10-Nov-80 4.
Interim Criteria for Safety-Related Masonry Wall Evaluation NRC, 00-Jul-81 SRP 3.8.4, Appendix A 5.
Uniform Building Code International Conference of Building Officials, 1979 6.
Building Code Requirements for Concrete Masonry Structures Detroit:
American Concrete Institute, 1979 ACI 531-79 and ACI 531-R-79 00 FrenMln Research Center A Division or The Fsonkfio Insorute
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