ML20053E825
| ML20053E825 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 05/28/1982 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Leasburg R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| IEB-80-11, NUDOCS 8206100128 | |
| Download: ML20053E825 (6) | |
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Oc3 ' M34 Ko MAY 2 81982 DISTRIBUTION:
vtfocket File N. Chokshi NRC PDR Docket Hos. 50-338 L cal PDR and 50-339 ORB #3 Rdg D. Eisenhut 0 ELD I&E Mr. R. H. Leasburg Vice President-- fluelear Operations L. Engle Virginia Electric and Power Company y
Post Office Box 26666 ACRS-10 Richmond, Virginia 23261 J. Heltemes-RA Clark
Dear Mr. Leasburg:
Gray Files
SUBJECT:
RESPONSE TO IE BULLETIN 80-11 'MSONRy' WALLS, FOR THE NORTH ANNA POWER STATION, UNITS NO.-1 AND NO. 2 (NA-1&2)
We have completed our review of your responses to the IE Bulletin as noted above. We find that additional information is needed in order to complete our review.
The requested _information is specified.in the Enclosure to this letter.
We request that the information be provided by July 15, 1982. The re-quested information affects fewer than 10 respondents; therefore Ot!B clearance is not required under P.L.96-511.. Please call us if you have any questions regarding the information as requested in the Enclosure.
Sincerely-Original sigdd by
%n L. C*c>nGE # Ve Robert'A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
As stated cc: See next page 8206100128 820528 PDR ADOCK 05000338 g
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- NRC F08M 318 (10-80) NRCM 0240 -
OFFICIAL RECORD COPY uso m iai-s w eeo
Virginia Electric and Powar Company I
cc:
Richard M. Foster, Esquire Mr. James Torson Musick, Williamson, Schwartz, 501 Leroy Leavenworth & Cope, P.C.
Socorro, New Mexico 87891 P. O. Box 4579 Boulder, Colorado 80306 Mrs. Margaret Dietrich Route 2, Box 568
~ Michael W. Maupin, Esquire Gordonsville, Virginia 22042 Hunton, Williams, Gay and Gibson P. O. Box 1535 fir. James C. Dunstance Richmond, Virginia 23212 State Corporation Commission Commonwealth of Virginia Alderman Library Blandon Building Manuscripts Department Richmond, Virginia 23209 Uriversity of Virginia Charlottesville, Virginia 22901 Mrs. June Allen North Anna Environmental Coalition Mr. Edward Kube 8720 Lockmoor Circle Board of Supervisors Wichita, Kansas 67207 Louisa County Courthouse P. O. Box 27 U.S. Environmental Protection Agency Louisa, Virginia 23093 Region III Office ATTN:
Regional Radiation Representative Ellyn R. Weiss, Esquire Curtis Building Sheldon, Harman, Roisman and Weiss 6th and Walnut Streets 1725 I Street, N.W. Suite 506 Philadelphia, Pennsylvania 19106 Washington, D. C.
20006 Mr. Paul W. Purdom Mr. W. R. Cartwright, Station Manager Environmental Studies Institute P. O. Box 402 Drexel University Mineral, Virginia 23117 32nd and Chestnut Streets Philadelphia, Pennsylvania 19104 Mr. Anthony Ganbardella Office of the Attorney General Atomic Safety and Licensing 11 South 12th Street - Room 308 Appeal Board Panel Richmond, Virginia 23219 U.S. Nuclear Regulatory Commission Washington, D. C.
20555 Resident Inspector / North Anna Regional Administrator c/o U.S.N.R.C.
Nuclear Regulatory Commission, Region II i
Route 2, Box 78A Office of Executive Director for Operations Mineral, Virginia 23117 101 Marietta Street, Suite 3100 Mr. J. H. Ferguson
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Executive Vice President - Power Virginia Electric and Power Company Post Office Box 26666 Richmond, Virginia 23261
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REQUEST FOR INFORMATION Enclosure North Anna Pow:r Station, Units No. 1 and Ns. 2 j
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l TECHNICAL EVALUATION A technical evaluation of the Licensee's re-evaluation criteria and j s
proposed modifications was conducted and the following concern was identified:
Licensee responses to IE Bulletin 80-11 [1] must be complete to facilitate proper evaluation.
It is noted that insufficient information has been provided regarding the criteria and justification used in the reevaluation of masonry walls at North Anna Power Station Unit 1.
More information is also needed on the cssumed wall boundary conditions and,on the analysis of walls having openings.
The final results of the analysis should be presented in terms of actual stresses and allowables.
Before a final technical evaluation report (TER) can be issued, the Licensee is required to address the following:
1.
Provide and justify the boundary conditions and modeling techniques used for the reevaluation of masonry walls at the North Anna plant and using sample calculations indicate how the potential for block pull-out was considered at equipment attachments.
2.
Using sample calculations, indicate how the effects of higher modes of vibration are included in the analysis.
3.
Provide sample calculations to show the analytical approach used for obtaining the stresses in single wythe and multiple wythe walls.
4.
Justify the increase factor of 1.67 used in the criteria for allowable stresses. 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 [10]
which are given below:
?/ce of Stress Factor Shear reinforcement and/or bolts 1.5 Masonry tension parallel to bed joint 1.5 l
Shear carried by masonry 1.3 Masonry tension perpendicular to bed joint l
-for reinforced masonry 0. 0.
-for unreinforced masonry 1.3 l
5.
Provide sketches of the proposed wall modifications and indicate how i
these modifications will correct the wall deficiencies.
6.
Provide the status of the proposed wall modifications.
7.
Provide the results of the analysis of masonry walls which do not satisfy. working stress criteria in terms of actual stresses versus allowable stresses.
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8.
The Licensee indicates that arching theory.and other inelastic f analyses are used to qualify some masonry walls.
The NRC, at
- present, does not accept the application of these analytical techniques to masonry walls in nuclear power plants in the absence of conclusive evidence to justify the application.
Indicate the number of walls which have been analyzed using these techniques.
9.
Justify the allowable stresses used for collar joints.
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s REFERENCES 1.
Masonry Wall Design NRC, 08-May-80 IE Bulletin 80-11 2.
B. R. Sylvia Letter to J. P. O'Reilly, NRC
Subject:
Response to IE Bulletin 80-11; Item 4, for North Anna and Surry Power Stations Virginia Electric & Power Co., 07-Jul-80 Serial No. 434/05 3.
B. R. Sylvia Letter to J. P. O'Reilly, NEC
Subject:
Extension of IE Bulletin 80-11 Deadline for Surry Power Station Units 1 and 2 and North Anna Power Station Units 1 and 2 Virginia Electric & Power Co., 24-Oct-80 Serial No. 868 4.
B. R. Sylvia Letter to J. P. O'Reilly, NRC
Subject:
IE Bulletin 80-11 Interim Report for Surry Power Station Units 1 and 2 and North Anna Power Station Units 1 and 2 Virginia Electric & Power Co., 03-Nov-80 Serial No. 878 5.
B. R. Sylvia Letter to J. P. O'Reilly, NRC Suoject:
IE Bulletin 80-11 Estimated Schedule fo: Surry Power Station Units 1 and 2 and North Anna Units 1 and ?
Virginia Electric & Power Co., 26-Dec-80 Serial No. 1005 6.
B. R. Sylvia l
Letter to J. P. O'Reilly, NRC
Subject:
IE Bulletin 80-11, Interim Progress Report for Surry Power Station Units 1 and 2 and North' Anna Power Station Units 1 and 2 Virginia Electric & Power Co.,15-Apr-81 l
Serial No. 245 1
7.
B. R. Sylvia Letter to J. P. O'Reilly, NRC
Subject:
IE.Bulletin 80-11, Interim Progress Report for Surry Power I
Station Units 1 and 2 and North Anna Power Station Units 1 and 2 l
Virginia Electric & Power Co.,15-Jun-81 Serial No. 372 l
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nWin Research Center A Onneson of The Feinsomme
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8.
B. R. Sylvia i
8 Letter to J.
P. O'Reilly, NRC
Subject:
IE Bulletin 80-11, Masonry Wall Design
'Surry Power i
Station Units 1 and 2, North Anna Power Station Units 1 and 2
^
Virginia Electric & Power Co.,19-Jun-81 Serial No. 372A 9.
W. R. Cartwright Letter to J. P. O'Reilly, NRC
Subject:
Submittal of Licensee Event Report No. LER 81-062/03L-0 for North Anna Unit 1 Virginia Electric & Power Co., 20-Aug-81 Serial N-81-142 i
10.
Interim Criteria for Safety-Related Masonry Wall Evaluation NRC, Jul-81 SRP 3.8.4, Appendix A 11.
Uniform Building Code International Conference of Building Officials,1979 12.
Building Code Requirements for Concrete Mansonry Structures De troit: American Concrete Institute,1979 ACI 531-79 and ACI 531-R-79 d
O USJ Franklin Research Center ac>a
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