ML20040G046
| ML20040G046 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 01/06/1982 |
| From: | Kiper K Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8202110172 | |
| Download: ML20040G046 (5) | |
Text
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Uccket nos.:
STl.60-454 and STl1 50-455 APPLICANT:
Cou:,onwealth Edison Coupany FALILITY:
byron Station LudJLLT:
duh tARY OF GLUTLCluilCid. iiLVILW hELTlWL A meeting was held December 3,1981 in Bethesda, Marylanc with representatives f roa Lowomsealth f.dison Cuapony, Sarbent & Luncy, and Dat es & licore to discuss issues in the geotechnical and geologic review of the byron FSAR.
a list of attendees is given in Lnclosure 1.
The discussion at the meeting involved the following topics:
1.
Sinknole design basis (t;241.1) and low seisuic velocity zones (Q241.2).
The applicant presentea a general overview of the geology of the byron site. The opplicant explained tnat the sinkhole pattern present at the site was apparently caused by f racture solutioning at rock Junctioris. They also held tne post tion that the rate of solutioning uds very lost so that any sinknole fornation was dt d Very slow Tate.
Tne applicant agreed to verify tnis assuuption of the uechanisa of sinkhole formation by borings in one sinkhole down well into bedrock to show that tne beading remains horizontal across the sinkhole. The staff questionea Table 2.4-28 which shows site area groundwater variations greater than 50 feet and Taule 2.4-27 which shows larse variations in Ca and hg desolved in groundwater near the site. The applicant agreed to reevaluate these table anc correct if necessary and to provice an uplanation that the rate of solutioning is very small. The staff dlso requested d Dap of h(O's (iioCk Quality Designation) by geologic l
formation, superimposed on a fracture-map.
Finally, the staff expressec concern obout area llo.11 that insufficient field information was availdole to verify that no significant cavity l
is present in this drea beneatn the pipeline. The presence of an apparent sinkhole 150 ft in diameter in this area brou3ht into question the applicant's sinkhole design basis of 50 tt.
In addition, the presence of low @D's and low seisaic velocity in this area with the absence of aoditional boring data will force the staff to the conservative position that large caverns may be present. Tne applicant wanted to present the results or the first borings before ccmitting to oore borings, nowever, the staff inoicated that this exploration alone will not resolve the stof t's concern.
This remains as oli open iten.
l OFFICE )
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8202110172 820106 PDR ADOCK 05000454 oAra )
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NRC FORM 318 00 80) NRCM 024a OFFIClAL RECORD COPY usm im-33m
o' by rofi 2.
Pipeline settlement and seisaic responses (Q241.6) and liquefaction potential (4241.4). The applicant agreed to provide more detailed analysis and the correlations useo to detenaine the seisaic response.
Also, the applicant agreed tu verity that groundwater table cannot reach to the level of the soil causing saturation and potential for liquefaction. This included correcting Table 2.4-28 as indicated in Part (1).
3.
Concrete cracks (Q241.7). The applicant presented results of invest-gations into concrete cracks in the longitudinal short wall connecting the essential cooling towers. The applicant concluded that the cracks were caused by thermal expansion and contraction and not by settlenent.
The staff requested that they formally submit this infonaation and explanation for further study.
The next necting was scheduled for Decec.ber 22, 1981 in Bethesda, !!aryland to continue this review.
Original signed by:
Wenneth b X1Pa" Kenneth L. Kiper, Project Mano3er Licensing branch No.1 Division of Licensing
Enclosure:
As stated cc: See next page Iru )
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OFFICIAL RECORD COPY usce mi-sz-em nnc ronu aia 00-803 nacu o24o
O Mr. Louis 0. DelGeorge Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767
' Chicago, Illinois. 60690 ccs:
Mr. William Kortier U. S. Nuclear Regulatory Commission Atomic Power Distribution Resident Inspectors Office-Westinghouse Electric Corporation 4448 German Cnurch Road P. O. Box 355 Byron, Illinois 61010 Pittsburgh, Pennsylvania 15230 Ms. Diane Chavez Paul M. Murphy, Esq.
602 Oak Street, Apt. #4 Isham, Lincoln & Beale Rockford, Illinois 61108 One First National Plaza 42nd Floor Chicago, Illinois 60603 Mrs. Phillip B. Johnson 1907 Stratford Lane Rockford, Illinois 61107 Ms. Bridget Little Rorem Appleseed Coordinator 117 North Linden Street Essex, Illinois 60935 Dr. Bruce von Zelb n Department of Biological Sciences Northern Illinois University.
DeKalb, Illinois 61107 Mr. Edward R. Crass Nuclear Safeguards and Licensing Division Sargent & Lundy Engineers 55 East Monroe Street Chicago, Illinois 60603 Nuclear Regulatory Commission Region III Office of Inspection and Enforcement 799 Roosevelt Road Glen Ellyn, Illinois 60137 Myron Cherry, Esq.
Cherry, Flynn and Kanter 1 IBM Plaza, Suite 4501 Chicago, Illinois 60611
Geotechnical Meeting December 3,1981 Attendees NRC S. Brocoum i
I. Alterman L. Heller J. Chen R. Li N. Choksi S. Chesnut K. Kiper i
Sargent & Lundy L. Holish j
D. Zaben l
.S. Boeing i
R. Netzel Commonwealth Edison Company K. Ainger Dames & Moore M. Kiefer T. Preber C. Kuntz l
1 s
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1 MEETING
SUMMARY
DISTRIBUTION o
Docket File.
G. Lear NRC PDR W. Johnston Local PDR JAN8 1982 S. Pawlicki TIC /NSIC/ Tera V. Benaroya Z. Rosztoczy LB#1 Reading.
.W.
Haass H. Denton/E. Case D. Muller Il R. Ballard D. Eisenhut/M. Jambor W. Regan R. Mattson
~
B. J. Youngblood P. Check D
A. Schwencer F. Congel F. Miraglia
- 0. Parr J. Miller F. Rcsa RECEi"' ~"
G. Lainas W. Butler
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l R. Vollmer W. Kreger p "'M 2 71982*T J. P. Knight R. Houstun Tyy]Ql,f# 1 R. Bosnak F. Schauer L. Rubenstein nx R. E. Jackson T. Speis 4
g Project Manager KKiper M. Srinivasan Q
g Attorney, OELD J. Stolz M. Rushbrook S. Hanauer OIE (3)
W. Gammill ACRS (16)
T. Murley E. Adensam F. Schroeder D. Skovholt M. Ernst NRC
Participants:
R. Baer C. Berlinger SBrocoum, IAlterman K. Kniel i
LHeller, JChen G. Knighton RLi, NChoksi A. Thadani SChesnut, KK' D. Tondi J, Kramer D. Vassallo i
P. Collins l
D. Ziemann bec:
Applicant & Service List
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