ML20024D288
| ML20024D288 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 07/21/1983 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Crouse R TOLEDO EDISON CO. |
| References | |
| NUDOCS 8308030490 | |
| Download: ML20024D288 (8) | |
Text
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b/>?h0S DISTRIBUTION Docket FfW NRC POR g $1 N L PDR 4
ORB H4 DEisenhut Docket No. 50-346 OELD NSIC EJordan JTaylor i'r. Richard P. Crouse ACRS-10 Vice President, Huclear ADeAgazio Toledo Edison Company RIngram Edison Plaza - Stop 712 Gray File 30011adison Avenue EBlackwood Toledo, Ohio 43652
.H 0rnstein.
NChokshi
Dear ;tr. Crouse:
Subject:
!!asonry Diock Malls On June 21 through 23, 1983 several 'iRC staf f nenbers and consultants met with your representatives at the Davis-Besse site to discuss the design and analysis and examine calculations and certain construction documents related to masonry block walls. The enclosure to this letter is a sunmary of the meeting.
Our examination of design analyses, sone of which epplied the energy balance technique for certain block walls, has revealed several arcas where the staff finds that additional infomation is required to continue with its review. The information required is identified on Attachment 1 of the enclosure to this letter. These requirements were discussed with your representatives prior to the conclusion of our r'eeting. Please provide your responses to these items no later than August 19, 1983.
We would like to thank you and your staff for the excellent cooperation extended throughout the meeting. We also note that your staff was well prepared which resulted in what we considered to be a very productive recting.
The infomation requested in this letter affects fewer than ten respondents; therefore, O!!B clearance is not required under P.L.96-511.
- iMtIGIEAL SIGalED M Jo m s. stess=
John F. Stolz, Chief Operating Reactors Branch f4 Division of Licensing
Enclosure:
As stated cc: w/ enclosure 830803o490 830721 See next pace PDR ADOCK 05000346 P
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Page Two techniques, boundary condition treatment, conservatisms and non-conservatisms, and computer input / output.
Five action items were derived frora this revi ew.
These are identified in Attachment 1 to this sunmary.
The meeting agenda is shown in Attachment 2 and a list of attendees is given in Attachment 3.
l n.i.mme *md WY Albert 't. De Agazio, Project Manager Operating Reactors Branch #4 Division of Licensing Originst st;mg re Nilesh C. Chokshi Structural Geosciences Engineering Branch Enclosu re :
As stated cc: w/ enclosure See next page 1
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Toledo Edison Company cc w/ enclosure (s):
Mr. Donald H. Hauser, Esq.
U.S. Nuclear Regulatory Comnission The Cleveland Electric Residen't Inspector's Office Illuminating Company 5503 N. State Route 2 P. O. Box 5000 Oak Harbor, Ohio 43449 Cleveland, Ohio 44101 Gerald Charnoff, Esq.
Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, D. C.
20036 Paul M. Smart, Esq.
Fuller a Henry 300 Itadison Avenue P. O. Box 2083 Regional Radiation Representative Toledo, Ohio 43603 EPA Region V 230 South Dearborn Street Mr. Robert B. Borsum Chicago, Illinois 60604 Babcock & Wilcox Nuclear Power Generation Division
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7910 Woodmont Avenue, Suite 220 Bethesda,11aryland 20814 Ohio Department of Health ATTN:
Radiological Health Program Director P. O. Box 118 President, Board of County
~ Columbus, Ohio 43216 Commissioners of Ottawa County Port Clinton, Ohio 43452 Attorney General
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as od reet James W. Harris, Director (Addressee Only)
Columbus, Ohio 43215 Division of Power Generation Ohio Department of Industrial Relations Harold Kahn, Staff Scientist 2323 West 5th Avenue Power Siting Comission 0
361 East Broad Street ojumbu '
o 43216 Columbus, Ohio 43216 Mr. James G. Keppler, Regional Administrato:-
U. S. Nuclear Regulatory Comission, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Larry D. Young Manager, Nuclear Licensing Toledo Edison Company Edison Plaza 300 Madison Avenue Toledo, Ohio 43652 j
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Enclosure s
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Docket No. 50-346
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s LICENSEE:
Toledo Edison Ccmpany and Cleveland Electric Illuminating Company
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FACILITY:
Davis-Besse Nuclear Power ;t,ation, Unit No.1
SUBJECT:
Summary of meeting June 21 THROUGH 23, 1983 CONCERNING MASONRY WALLS On June 21, 1983 through June 23, 1953, several NRC staff and NRC consultants met with representatives of The Toledo Edison Company and its Consultant at the plant. site to review certain masonry wall design calculations for the Davis-Besse Nuclear powar Station and to view a number of masonry walls of particular interest throughout the facility.
This design review is conducted as part of the Commissions activities with respect to IE Bulletin 80-11 The plant walk-down allowed the staff and its consultants to observe actual installed conditions of the masonry walls and, in combination with the review of design calculations, understand the application of the energy balance technique (a non-linear analytical method) used by the licensee to qualify certain scalls.
The walk'-down was conducted
<1th particular interest directed to examination of boundary conditions, post installation modifications, accessibility, general condition, and attachments.
In response to IE Bulletin 80-11 the licensee determined that 36 walls require modi fication.
To date 17 of these have been completed.
The remaining modifications are in progress and the licensee expects them to be completed by November 1903 Construction related documents inc,luding specifications, material test reports, inspection records, and construction details were examined.
Calculations for nine walls were examined with respect to modeling 4
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a Paga Two techniques, boundary condition treatment, conservatisms and non-conservatisms, and computer input / output.
Five action items were derived from this review.
These are identified in Attachment 1 to this sunmary.
The meeting agenda is shown in Attachment 2 and a list of attendees is given in Attachment 3.
Albert 'l.
Agazio, Proje ger Operating Reactors Branch #4 Division of Licensing Nilesh C. Chokshi Structural Geosciences Engineering Branch Enclosure :
As stated cc: w/ enclosure See next page 4*
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c, REQUEST FOR ADDITIONAL INFORMATION DAVIS-BESSE MASONRY BLOCK tlALLS 1.
Provide a summary of walls which have to be qualified by an increase in allowable stresses for OBE load combinations.
Indicate actual calculated stresses and allowable stresses.
Justify the increase in allowable stresses. -
2.
Clarify and justify the use of I effective /t effective or I uncracked/t uncracked in the calculations of wall No. 2297, where:
I effective = Effective moment of Inertia t effective = Effective thickness of the section used in the analysis I uncracked = Uncracked moment of Inertia t uncracked = Thickness of the uncracked section used in the analysis 3
Veri fy that for wall 3447, 3457 and 3467, the only safety system affected by wall failure would be the HVAC duct as assumed in the calculations.
4 Provide the basis for not perfbruing a displacement / operability check 4
for sa fety systems attached to walls. qualified by the ductility values of less than 3.0.
5 Justify the assumption of fixed boundary condition in some situations by examining a typical connection det' ail where this assumption is used.
Assess the impact of joint flexibility on calculated results.
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-c AGENDA DAVIS-BESSE MASONRY WALL REVIEW PLANT VISIT AND DESIGN CALCULATIONS REVIEW June 21,1983
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1)
Review of drawings, general construction techniques,
materials, etc., status with regard to modi fication.
Brief discussion and review of QA/QC documents located at the site.'
2)
Plant walk-down to examine masonry walls with particular emphasis on walls qualified by the use of Energy Balance Technique, installed modifications, boundary conditions,
etc.
June 22, 1983 1)
Discussion of Energy Balance Technique / criteria as used in Davis-Besse.
2)
Review of specific wall calculations.
' June 23,1983 1)
Dis'cussion of stack bond vs. running bond construction.
2)
General discussion / clarification on the Davis-Besse responses to the, previous action items.
3)
Discussion on the use of joint reinforcing in qualifying-Davis-Besse walls..
- 4) Summary, finalize action items, schedules, exit meeting.
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e-s MASONRY WALLS i
JUNE 21'THROUGH 23, 1983 MEETING ATTENDEES DAVIS-BESSE NUCLEAR POWER STATION, OAK HARBOR, OHIO Toledo Edison Company Richard A. Link Chsries L. Mekbel Larry D. Young Bechtel Associates Pete Corrato Charles M. Foltyn Melvin Franzen James M. Ogle Franklin Research Cinter Vu Con Drexel University Harry G. Harris USNRC N11esh C. Chokshi Albert W. DeAgazio a
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