ML20049J038
| ML20049J038 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 03/02/1982 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| ISSUANCES-OL, ISSUANCES-OM, NUDOCS 8203110386 | |
| Download: ML20049J038 (13) | |
Text
gnCEGy jo UNITED STATES q
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NUCLEAR REGULATORY COMMISSION g,
- j WASHINGTON, D. C. 20555 o
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MAR 21982 Docket Nos.: 50-329/330 OM, OL APPLICANT:
Consumers Power Company FACILITY:
Midland Plant, Units 1 and 2 SUBJ ECT:
SUMMARY
OF APRIL 20-24, 1981 AUDIT OF MIDLAND SEISMIC AND STRUCTURAL DESIGN CALCULATIONS By its letter of July 7,1980, the NRC Staff notified Consumers Power Company (the Applicant) of its plans to perform an audit of seismic and structural design analyses of safety-related structures, and provided guideline questions for the topics to be covered. The audit was subsequently conducted on April 20-24, 1981 in Ann Arbor, Michigan. The meeting agenda and speakers are shown on Enclosure 1.
Meeting attendees are listed by.
At the audit, the NRC Staff was given a ten-volume set of documents entitled "NRC Structural Technical Audit" responding to the guideline questions of July 7,1980. Enclosure 3 is a general index for the ten volumes. Since the audit consisted primarily of a review of the information in these documents, and also of a review of the actual associated design calculations, a detailed summary by this paper is unnecessary. A copy of these volumes is retained by the NRC Central Files, Bethesda, Maryland.
Open items identified by the NRC Staff during the audit are listed by (See post-script below for disposition of these items).
Post-Script Since this audit, the Applicant's letter of October 19, 1981 has provided updated pages for the document "NRC Structural Technical Audit" and responded to the open items (Enclosure 4) identified during the April 20-24, 1981 audit. The letter also noted that no further revisions to the document were planned, although remaining longer-term issues related to the audit would be documented by FSAR revisions or separate correspondence to the NRC.
co b 7.k'9 g
Darl Hood, Pr ject Manager l
Licensing Branch No. 4 Division of Licensing
Enclosures:
As stated cc: See next page l
8203110386 820302 PDR ADOCK 05000329 A
' Mr. J. W. Cook.
cc: Commander, Naval Surface Weapons Center e
ATTN:
P. C. Huang White Oak Silver Spring, Maryland 20910 Mr. L. J. Auge, Manager Facility Design Engineering Energy Technology Engineering Center P.O. Box 1449 Canoga Park, California 91304 Mr. Neil Gehring U.S. Corps of Engineers NCEED - T 7th Floor 477 Michigan Avenue Detroit, Michigan 48226 Charles Bechhoefer, Esq.
Atomic Safety & Licensing Board U.S. Nuclear Regulatory Commission Washington, D. C.
20555 Mr. Ralph S. Decker Atomic Safety & Licensing Board U.S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. Frederick P. Cowan Apt. B-125 6125 N. Verde Trail Boca Raton, Florida 33433 Jerry Harbour, Esq.
Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Washington, D. C.
20555 Geotechnical Engineers, Inc.
ATTN: Dr. Steve J. Poulos 1017 Main Street Winchester, Massachusetts 01890 e di 6
ENCLOSURE 1 Page 1 of 2 e
e NRC STRUCTURAL DESIGN AUDIT MIDLAND PLANT UNITS 1 and 2 LOCATION Bechtel Professional Associates Corp 777 Eisenhower Parkway Ann Arbor, Michigan DATE:
April 20-24, 1981 AGENDA TOPICS Introduction and General Design Features Containment Building Auxiliary Building Diesel Generator Building Service Water Pump Structure Buried Pipes and Tanks Borated Water Tanks O
Page 2 of 2 T
s NRC STRUCTURAL DESIGN AUDIT BECHTEL ORAL PRESENTATIONS I
i In troduction..................Lynn Cur tis General Civil Design..........Ted Johnson
- Bechtel Audit Coordinator...Gordon Tuveson Soil Settlement History Building.....Shing Lo General Seismic Analysis............. Chuck McConnel i
Containment General Design........... Bob Yuan Seismic Analysis......... Chuck McConnel Reactor Vessel Support Modifications.....Mo Elgaaly i
Auxiliary Bldg. General Design...............Lakshmi Lakshminarayanan l
Seismic Analysis............. Chuck McConnel Foundation Modifications.....Shing Lo l
New Siesmic Analysis......... Chuck McConnel i
Diesel Generator Bldg. General Design............. Paul Shen Seismic Analysis........... Chuck McConnel Reanalysis Due to Surcharge Load.....Shing Lo
{
New Seismic Analysis....... Chuck McConnel S ervice Water Pump S tructure General Design............. Paul Shen f
Seismic Analysis........... Chuck McConnel Foundation Modifications...Shing Lo New Seismic Analysis....... Chuck McConnel i
Buried Steel Pipes General Design........ John Legette l
Buried Concrete Pipes
........S. Rao Buried Tanks
........S.
Rao r
Buried Pipes and Tanks Seismic Analysis...... Chuck McConnel Borated Water Tanks General Design..........S.
Rao Seismic Analysis........ Chuck McConnel Foundation Settelment Analysis....Shing Lo New Seismic Analysis.... Chuck McConnel l
l No presentation being given
ENCLOSURE 2 i
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ENCLOSURE 3.-
"NRC STRUCTURAL TECHNICAL. AUDIT" e
GENERAL INDEX VOLUME 1 CONTAINMENT BUILDING - SEISMIC ANALYSIS VOLUME 2 CONTAINMENT BUILDING - GENERAL ANALYSIS CONTAINMENT BUILDING - KEY DESIGNS VOLUME 3 CONTAINMENT BUILDING - KEY DESIGNS (CONTINUED)
VOLUME 4 AUXILIARY BUILDING - SEISMIC ANALYSIS AUXILIARY BUILDING - GENERAL ANALYSIS VOLUME 5 AUXILIARY BUILDING - KEY DESIGNS AUXILIARY BUILDING - JUSTIFICATION OF PROPOSED REPAIRS VOLUME 6 DIESEL GENERATOR BUILDING - SEISMIC ANALYSIS DIESEL GENERATOR BUILDING - GENERAL ANALYSIS VOLUME 7 DIESEL GENERATOR BUILDING - KEY DESIGNS DIESEL GENERATOR BUILDING - JUSTIFICATION OF PROPOSED REPAIRS VOLUME 8 SERVICE WATER PUMP STRUCTURE - SEISMIC ANALYSIS SERVICE WATER PUMP STRUCTURE - GENERAL ANALYSIS VOLUME 9 SERVICE WATER PUMP STRUCIURE - KEY DESIGNS SERVICE WATER PUMP STRUCTURE - JUSTIFICATION OF PROPOSED REPAIRS VOLUME 10 BURIED PIPING AND TANKS BORATED WATER STORAGE TANKS l
l l
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ENCLOSURE 4 Page 1 of 3 NRC STRUCTURAL AUDIT PRELIMINARY LIST OF OPEN ITEMS Containment Review Numbers on Page 21, Table 3.8-1 a.
b.
Verify that torsion was used on components and internal structures.
c.
Membrane shear allowable in equipment hatch area shear allowable (400 psi) needs verification d.
Bijlaard: Show that this technique is applicable for contain-ment shell Check adequacy of baseslab shear reinforcement #9's on vertical e.
wide flanges.
f.
Impact effect of 1/32 inch gap steam generator needs to be assessed g.
Allowablemembranetension,3]f' and6[f' - which load combination in tension and bending and wheEe does it apply h.
Want to know the actual yield stress for reinforcement in the primary shield.
1.
Explain Mu and Vu along with safety factor; Page 57 j.
Reactor pressure vessel upper lateral support is this consi-dered in analysis k.
To tabulate shear values in all tables Auxiliary Building Check for possible additional loading on control tower due to a.
the effects of caissons b.
Bending on foundation of wing due to revised outer caissons must be assessed Stiffness of caissons should consider concrete and soil together c.
d.
Is friction between the caissons required to develop full load Subgrade modulus should be calculated from tests for use in e.
the foundation design
'f.
Fuel rack cales-unchecked (vendor cale) impact factor used between fuel racks, and pool walls from tipping needs to be studied (alesforshearwallshouldbeexplainedshowing
. (R:aolved) g.
l approach used h.
How does thru cracks affect load capability
Page 2 of 3 o,
1.
Effect of long-term settlement on control tower versus main section of auxiliary building j.
Use an acceptable method to analyze the thru cracks, to verify capacity of isolated typical section.
Diesel Generator Building a.
Verify spring constants b.
Cracks: estimate stress; also consider widening of cracks c.
Cracks should include reversal effects of seismic loads d.
Co-ordinate with vendor on pedestal design and seismic qualification for diesel generators e.
Want commitment to evaluate cracks influence on structural capacity f.
Present evaluation of tornado missile effects on a wall with f 4*v' cracks Service Water Pump Structure a.
Monitor cracks b.
Hydrodynamic loads on interior walls Foundation bearing capacity of new wall needs identified c.
factor of safety d.
Commit to monitor service water pipes for settlement effects.
Borated Water Storage Tanks Provide details of final design, especially connection between a.
the two foundation walls b.
Provide Vendor acceptance of tank foundation modifications Pipes should also be monitored in the valve pit c.
d.
Commit to monitor high stress points after implementation of fix for cracks Buried Pipe and Tanks Earthquake should be considered in tank piping connection a.
design b.
Control room tanks should be monitored for displacements Describe air supply lines to control room from tanks c.
4/24/81 SS:5
Page 3 of 3 s
' 4 General Want schedule for design of remedial fixes a.
b.
Want copy of calculation index for fixes r
4/24/81 ss:5
r MEETING
SUMMARY
DISTRIBUTION Docket File G. Lear NRC/PDR S. Pawlicki Local PDR V. Benaroya TIC /NSIC/ TERA Z. Rosztoczy LB #4 r/f W. Haass 9
O H. Denton D. Muller
.Q, E. Case R. Ballard s
D. Eisenhut W. Regan g'f
' 'C CA A# j9 ' "'SD )
R. Purple R. Mattson J/
/
~]#4f f B. J. Youngblood P. Check A. Schwencer
- 0. Parr I.
%d2f4 c.
p' F. Miraglia F. Rosa 6%
J. Miller W. Butler Eg TQg G. Lainas W. Kreger
/
R. Vollmer R. Houston
'I J. P. Knight W. Gammill R. Bosnak L. Rubenstein F. Schauer T. Speis R. E. Jackson W. Johnston Attorney, OELD S. Hanauer 0IE (3)
C. Berlinger ACRS (16)
F. Schroeder R. Tedesco D. Skovholt R. Hernan M. Ernst K. Kniel NRC
Participants:
G. Knighton D. Hood A. Thadani F. Rinaldi D. Tondi J. Kramer D. Vassallo P. Collins D. Ziemann F. Congel J. Stolz M. Srinivasan R. Baer bcc:
Applicant & Service List E. Adensam Project Manager D. Hood Licensing Assistant M. Duncan F. Rinaldi J. Kane
.)
A. Cappucci R. Gonzales W. Paton i
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