ML18139B882
| ML18139B882 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 05/21/1982 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Leasburg R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| IEB-80-11, NUDOCS 8205280556 | |
| Download: ML18139B882 (6) | |
Text
Docket Nos. 50-280 and 50-281 Mr. R.H. Leasburg Vice President - Nuclear Operations Virginia Electric and Power Company Post Office Box 26666 Richmond, Virginia 23261
Dear Mr. Leasburg:
MAY 2 1 1982 DISTRIBUTION Docket NRC PDR L PDR NSIC ORB#l Rdg DEisenhut OELD IE ACRS-10 DNei ghbors CParrish Gray Fi 1 e We are reviewing your responses to NRG IE Bulletin 80-11 (Masonry Wall Design) for the Surry Power Station, Unit Mos. 1 and 2.
The responses we have reviewed are delineated in the enclosure.
We find that we need adrHtional information so that we inay continue aur review.
Please respond to the enclosed questions by July 10, 1982.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore 0MB cl eara'r:ice is not required under P.L.96-511.
Enclosure:
As stated cc w/eoc1osure:
See next page
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(1*.. 8205280556 820521 i'
PDR ADOCK 05000280
,i G PDR Sincerely, ORIGINAL SJ,GNED Steven A. Varga, Chief Operating Reactors Branch #1 Division of Licensing OFFICE **** ~.~-~-~~-
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SURNAME.,. ** -~~J.~.i.1~.r.~.. *t~.YJ.\\..:... ~...........................-:.............................................................................................
DATE *
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NRC FORM 318 (10-80) NRCM 0240 OFFICIAL R l!COR O COPY USCiP0:19l31-33S-960
Mr. R.H. Leasburg Virginia Electric and Power Company cc: Mr. Michael W. Maupin Hunton and Williams Post Office Box 1535 Richmond, Virginia 23213 Mr. J. L. Wilson, Manager P. O. Box 315 Surry, Virgin*ia 23883 Swem Li bra ry College of William and Mary Williamsburg, Virginia 23185 Donald J. Burke, Resident Inspector Surry Power Station U.S. Nuclear Regulatory Commission Post Office Box 166 Route 1 Surry, Virginia 23883 Mr. J. H. Ferguson Executive Vice President - Power Vi rgi ni a Electric and Power Company Post Office Box 26666 Richmond, Virginia 23261 James P. O'Reilly Regional Administrator - Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
- e TECHNICAL EVAWATION e.~...... ~**-~*.
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+-.
l A technical evaluation of the Licensee's re-~\\ialuation criteria aJa i
proposed modifications was conducted and the following concern was identified:
Licensee.responses to IE Bulletin 80-11 [l] 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 Surry Power Station Units l and 2~*-. More information is also needed on the assumed 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 a.llowables.
Before a final technical evaluation report (TER) can be issued, the Licensee is.required.to address th~ following:
- l. Provide and justify the boundary conditions and modeling techniqu~s-**
used for the reevaluation of masonry walls at the Surry 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.
Provi.de 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 l.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:
Type of Stress Shear reinforcement and/or bolts Masonry tension parallel to bed joint Shear carried by masonry Masonry tens ion perpendicular to.
bed joint
-for reinforced masonry
-for unreinforced masonry Factor 1.5 1.5 1.*J o.o 1.3
- 5.
Provide sketches of the proposed wall modifications and indicate how these modifications will correct the wall deficiencies.
- 6.
Provide the status of the proposed wall modifications.
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- 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.
- 8.
The Licensee indicates that arching theory and other inelastic analys~s are used to qualify some mason~y walls.
The NRC, at preserit, 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 ha.ve been analyzed using these techniques.
- 9.
Justify the allowable stresses used for collar. j~ints.
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- 3.
e Masonry Wall Design NRC, 08-May-80 IE Bulletin 80-11 B. R. Sylvia
- REFERENCES Letter to J. P. O'Reilly, NRC
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Subject:
Response to IE Bulletin 80-111 Item 4, for North Anna and Surry Power Stations Virginia Electric & Power Co., 07-Jul.-80 Serial No. 434/05 B. R. Sylvia.
Letter to J. P. O'Reilly, NRC
Subject:
Elctension 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., 24-0ct-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 Uni ts l a,nd 2 and North Anna Power Station Uni ts l and 2 Virginia Electric & Power Co., 03-Nov-80 Serial No. 878
- 5.
B. R. Sylvia Letter to J. P. O'Reilly 1 NRC
Subject:
IE Bulletin 80-11 Estimated Schedule for Surry Power Station Units land 2 and North Anna Units land 2 Virginia Electric & Power Co., 26-Dec-80 Serial No. 1005
- 6.
B. R. Sylvia Letter to J. P. O'Reilly, NRC
Subject:
IE Bulletin 80-11, Interim Progress Report for Surry Power Station Units l and 2 and North Anna Power Station Units l and 2 Virginia Electric & Power Co., 15-Apr-81 Serial No. 245 7..
B. R. Sylvia Letter to J. P. O'Reilly, NRC
Subject:
IE Bulletin 80-11, Int:erim Progress Report for Surry Power Station Units 1 and 2 and North Anna Power Station Units l and 2 Virginia Electric & Power Co., 15-Jun-81 Serial No. 372
~nklin Research *center A Division of The Franklin lnstil\\Jle
e
- 8.
B. R. Sylvia Letter to J. P. O'Reilly, NRC
Subject:
IE Bulletin 80-11, Masonry Wall Design - Surry Power Station Units 1 and 2, North Anna Power Station Units 1.and 2 Virginia Electric & Power Co., 19-Jun-81 Serial No. 372A
- 9.
J. L. Wilson Letter to J~ P. 0 1 Reilly, NRC
Subject:
Submittal of Licensee Event Reports for Surry Units land 2 Virginia Electric & Power Co., 21-Aug-81 Serial No-81-047
- 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 Detroit:
Ame.rican Concrete Institute, 1979 AC! 531-79 and ACI 531-R-79
~nklin Research Center A Division ol The Franklin Institute