ML20040H165
| ML20040H165 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 02/05/1982 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| ISSUANCES-OL, ISSUANCES-OM, NUDOCS 8202170348 | |
| Download: ML20040H165 (8) | |
Text
,
I b 1002-kB n!
~-
- %/.,O p
s
\\
/
~
Docket idos.: 50-329
" %". U C 9
and 50-330 OH, OL fpg 01982u, -
i
" E @ @ gf y a 10 nc; APPLlciasT: consumers Power coupany g/ j f
FACILITY:
Hidland Plant, Units 1 and 2 SubdECT:
5Ulvad Y OF DLCLHBER 10, 1961 is.LTlHL ON ChnLKS In HIDLNiu bulLDIh6S 014 PLAriT FILL
\\
On December 10, 1961, the hdC staff out in bethesda, haryland with Consutaers Power Coapony, Bechtcl, and consultants to discuss concrote cracks in the Auxiliary building, Service Water Pucip Structure and Diesel Generator building at flidland Plant, Units 1 and 2. is a suraaary of the aceting and incluoes a list of rnecting attendees.
Darl S. iioco, Project Manager Licensing branch No. 4 Division of Licensing
Enclosure:
As stated cc: See next page l
827!2170248 820205 PDR ADOCK 05000329 A
.....QL3LQh.....
...LA.:DLitph.4.....DLI(B # A......
orry yti.0.tl0Ad;.ch...
...MIT8 dan........EAd,dD).E..
sua==c h
.....U....W.8 2..... 24.dr./B2....... 2J...[/.82....
em, OFFICIAL RECORD COPY usa m m i m aa nec ronu sta tto40) NRCM 024o
e MEETING
SUMMARY
DISTRIBUTION Docket File
- 6. Lear NRC/PDR S. Pawlicki Local PDR V. Benareya TIC /NSIC/ TERA Z. Rosztoczy LB #4 r/f W. Haass H. Denton D. Muller E. Case R. Ballard D. Eisenhut W. Regan R. Purple R. Mattson B. J. Youngblood P. Check A. Schwencer
- 0. Parr F. Miraglia F. Rosa J. Miller W. Butler G. Lainas W. Kreger R. Vollmer R. Houston J. P. Knight W. Gammill R. Bosnak L. Rubenstein F. Schauer T. Speis R. E. Jackson W. Johnston Attorney, OELD S. Hanauer OIE (3)
ACRS (16) h*.$$bNeder R. Tedesco D. Skovholt M. Ernst K. Kniel NRC
Participants:
G. Knighton A.
adani D. Hood D. Tondi F. Rinaldi J. Kr mer F. Schaver D. Vassallo J. Haarstad P. Collins P. Huang D. Ziemann J. Matra H. Kuo F. Congel J. Stolz M. Srinivasan R. Baer bcc: Applicant & Service List C. Berlinger E. Adensam l
Project Manager D. Hood Licensing Assistant M. Duncan l
l l
l l
s MIDLAND Mr. J. W. Cook Vice President Consumers Power Cogany 1945 West Parnall Road Jackson, Michigan 49201
~
cc:
Michael I. Miller, Esq.
Mr. Don van Farrowe, Chief Ronald G. Zamarin, Esq.
Division of Radiological Health Alan S. Farnell, Esq.
Department of Public Health Isham, Lincoln & Beale P.O. Box 33035 Suite 4200 Lansing, Michigan 48909 1 First National Plaza
- Chicago, Illinois 60603 William J..Scanlon, Esq.
2034 Pauline Boulevard Janes E. Brunner, Esq.
Ann Arbor, Michigan 48103 Consumers Power Conany 212 West Michigan Avenue U.S. Nuclear Regulatory Commission Jackson, Michigan 49201 Resident Inspectors Office Route 7 Myron M. Cherry, Esq.
Midland, Michigan 48640 1 IBM Plaza Chicago. Illinois 60611 Ms. Barbara Stamiris 5795 N. River Ms. Mary Sinclair Freeland, Michigan 48623 5711 Summerset Drive Midland, Michigan 48640 Mr. Paul A. Perry, Secretary' Consumers Power Company Stewart H. Fr~eeman 212 W. Michigan Avenue j
Assistant Attorney General Jackson, Michigan 49201 i
State of Michigan Environmental l
. Protection Division Mr. Walt Apley 720 Law Building c/o Mr. Max Clausen Lansing, Michigan 48913 Battelle Pacific North West Labs (PNWL)
Battelle Blvd.
Mr. Wendell Marshall SIGMA IV Building Route 10 Richland, Washington 99352 Midland, Michigan 48640 Mr. I. Charak, Manager Mr. Roger W. Huston NRC Assistance Project l
Suite 220 Argonne National Laboratory 7910 Woodmont Avenue 9700 South Cass' Avenue j
Bethesda, Maryland 20814 Argonne, Illinois 60439 Mr. R. B. Borsum James G. Keppler, Regional Administrator Nuclear Power Generation Division U.S. Nuclear Ragulatory Commission, Babcock & Wilcox Region III 7910 Woodmont Avenue, Suite 220 799 Roosevelt Road Bethesda, Maryland 20814 Glen Ellyn, Illinois 60137 t
,e"
Mr. J. W. Cook cc: Commander, Naval Surface Weapons Center 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 j
Apt. B-125 6125 N. Verde Trail Boca Raton, Florida 33433 Jerry Harbour, Esq.
Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission l
. Washington, D. C.
20555 Geotechnical Engineers, Inc.
ATTN: Dr. Steve J. Poulos 1017 Main Street Winchester, Massachusetts 01890
ATTENDEES December 10, 1981 Name Organization Darl S. Hood LBi/4/ NRR F. Rinaldi SEB/NRR F. Schaver SEB/NRR J. Haarstad NRC/ Consultant Pao Huang hRC/ Consultant John P. Hatra, Jr.
NRC/ Consultant Joseph D. Kane NRC/COE/HGEB H. Kuo NRC T. E. Johnson Bechtel N. Swanberg Bechtel Dennis Budzik Consumers Power Company Fernando Villalta Consumers Power Company W. Corley PCA (CPCo Consultant)
M. Sozen Bechtel (Consultant) 1 G
S e
^
~
o w-a wc m.
4g y ;ac e F3 * *>
To*
Fila 0485.2,1 g,, g From FVillalta, P-14-421 6Y CONSUMERS POWER Date December 28, 1981 COMPANY Subject MIDLAND PROJECT -
Internal MEETING W/NRC STAFF TO DISCUSS EXISTING-Correspondence CONCRETE CRACKS IN AUX BUILDING, SWPH AND DG BUILDINGS ON DECEMBER 10, 1981 -
FILE'0485.21 SERIAL 15416 CC JWCook, P-26-336B (w/o) MIMiller, IL&B-Chicago RCBauman, P-14-314B (w/o)PSteptoe, IL&B-Chicago JEBrunner, M-1079 TRThiruvengadam, P-14-400 DMBudzik, P-24-517A FWilliams, IL&B-Washington DBMiller, Midland RWHuston, Washington (4),
1.0 Dr William G Corley - Presentation. Dr Corley showed slides of a water tank structure, 2 feet thick wall resting on a rock till foundation.
Concrete was placed on 60 feet long pours resulting in through cracks due to volumetric changes by temperature and shrinkage.
Cracks were mapped from 2 to 20 mills (0.002"-0.020") to check water leakage in the tank.
2.0 Dr Mete Sozen - Presentation.
Professor Sozen showed slides of an experimental cyclic loading behavior of a reinforced concrete box structure that was observed and reported by Umemura of the University of Tokyo.
Lateral load developed flexural and shear cracks in both directions in the walls.
The test results demonstrate that cracks in concrete structures with adequate amount of anchored reinforcement crossing the cracks do not
,~
affect the strength of the system.
3.0 Significance of Existing Concrete Cracks:
3.1 Auxiliary Building Dr Corley stated that the cracks observed in this building are due to volumetric changes in the concrete by temperature and shrinkage.
Some flexural cracks were observed on floor slabs.
The crack pattern does not* indicate they are due to settlement.
3.2 Service Water Pump Building Dr Corley and Dr Sozen stated that the cracks in this building are a combination of settlement and volumetric changes in the concrete as the case in the Auxiliary Building.
3.3 Diesel Generator Building Dr Corley and Dr Sozen stated that the crack pattern can be associated with settlement due to the cracks fanning out in the wall uear the top of the duct banks, before their isolation from the walls.
The construction of the walls at different time pours of concrete also contributes to the cracking of the wall.
ic1281-1202a102 I
~..
SERIAL 15414 2
4.0 NRC Concerns 4.1.Darl Hood stated the purpose-of this meeting is to establish an acceptance. criteria for existing cracks in the buildings.
4.2 Frank Rinaldi is concerned on how to evaluate a crack and the behavior of reversible stresses on cracks going from tension into compression.
4.3 F Schauer is concerned of a wall designed for a vertical "P" tension load.
The wall was cracked for an additional "P" horizontal load.
Will the wall take the vertical "P" load?
4.4 F Schaver asked what is the criteria for mapping cracks.
4.5 J D Kane would like to make sure that settlement is not a concern for cracks.
4.6 P Huang is concerned on multiple cracking for reversible loads or change of load application as mentioned in Question 4.3.
5.0 Answers to NRC Concerns Answer.to 4.1 is addressed in Item 6.
Answer to 4.2 - Dr Corley outlined the following nine steps to evaluate a crack:
1.
Type of member (structural or nonstructural) 2.
Type of loads and direction 3.-- Type of reinforcing 4.
Type of construction and sequence of construction 5.
Location of the crack 6.
Length of the crack 7.
Ratio width / length of the crack 8.
Direction of the crack 9.
Multiple crack pattern
.Dr Sozen addressed reversible stresses in his presentation in Item 2.0 for cyclic. loading behavior.
Answer to 4.3 - Dr Sozen stated that if horizontal reinforcement is adequate to cross the cracks then the wall can take the vertical load "P" in tension or compression.
Answer to 4.4 - Dr Corley stated that a skilled technician from the PCA laboratory would be able to map a two or three mills crack.
A 5 mills (0.005") crack is hard to read with a magnifying instrument.
Answer to 4.5 - Dr Sozen and Dr Corley stated that settlement is not a concern because of the crack pattern existin'g o'n the walls.
ic1281-1202a102'
-t
SERIAL 15416 3
E Answer to 4.6 - Consultants Dr Sozen and Dr Corley will provide engineering information in regards to change of load application.
6.0 Future Crack Monitoring and Acceptance Criteria Consultants Dr Sozen and Dr Corley will review each structure to evaluate the present strength.for the existing cracks.
Dr Sozen proposed to use the following criteria:
The ratio of reinforcement times its yield strength should be larger or equal than four times the square root of the strength of concrete (pfy > 4%/f'c).
If this requirement is not met, a limit analysis for a subsection of the structure with its membrane forces should be done.
Underpinning of the Auxiliary Building will take care of the concern of cracking caused by differential settlement.
T E Johnson stated that Bechtel Power Corporation is working on the structural analysis to simulate the jacking loads due to the construction sequence during the underpinning operation.
The consultants will reevaluate the. crack width limits for acceptance as proposed by Bechtel Power, Corporation as follows:
a.
Evaluate any new or existing crack width larger than 10 mills (0.010").
b.
Stop construction for crack widths larger than 30 mills (0.030").
~
An "on call" evaluation and monitoring of cracks by the consultants
" was suggested for the future serviceability and durabilility of the buildings.
Dr Sozen stated is not a need to seal cracks for water leakage when the' water is not corrosive.
T E Johnson stated th,at Bechtel will seal cracks larger than 0.013".
FV/mo ic1281-1202a102
-- e-e-- -,. - - - --
.iv.-
--v++wwe
--w,
,.r
,e--.,p e,
--,y-
.-w
>,.,--w,-
y--e-
ow-,-,,,y--vo=,
~
.r.
ATTENDEES December 10, 1981 Name Organization Darl S Hood I?A4/NRR F Rinaldi~
SEB/NRR F Schaver SEB/NRR J Haarstad NRC/ Consultant Pao Huang NRC/ Consultant John P Matra, Jr NRC/ Consultant Joseph D Kane NRC, DOE, HGEB H Kuo NRC T E Johnson Bechtel N Swanberg Bechtel Dennis Budzik Consumers Power Co Fernando Villalta Consumers Power Co W. M.k PCA(cfC= W N y
/t, MP
/bA4/ 4 M I
i ic1281-1202a102.
l e
-_.