ML19323D498
| ML19323D498 | |
| Person / Time | |
|---|---|
| Site: | Bailly |
| Issue date: | 04/30/1980 |
| From: | Thompson O Office of Nuclear Reactor Regulation |
| To: | Lear G Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8005210615 | |
| Download: ML19323D498 (31) | |
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NUCLEAR REGULATORY COMMISSION
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Secrge Lear, Chief O /r '
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Cwen 0. Thce;s:n, Osetecnnical Engineer 3ectachni:11 Engineering Secti:n Hycrologi and 3sc:echnica'. Engineering 3 ranch, :E a,,
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- r. ie r.:.L.: O.RA'iCM..- '. AR-4, M.. ^. L.ynch, !.0'.4 RE'!!EW STATL'S : Staff ?re:aring Recuests for Inf:rmation and Positi:ns On A;ril 17 ana 18, 1920, a meeting was neld at the effices of Sargen: and Luncy, Chicago. A :en:ees at the meeting inci;ced re:resen atives fr:::
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NRC Censultants (Cor;s of Engineers and Dr. M. T. Davissen)
.1!PSCO Sargent and Lundy Cames and Mccre Illinois Attorney Generai anc Per:er Ccunty Ccint Intervences The :ur: se f the meeting was :: discuss draft recuests for inf rmati n and staff ;csiti:ns sent to the a;plicant :n Acril 11, 1950 (L. h.tenstein t: H. Lyie).
We resolve s:ce issues and f:und tne need for additi:nal inf:r:ation an other issues. We agreed :: su:mit formal Staff ?csiticns and Requests for Additional Inf:riation to the a:plicant wi-hin about 2 weeks. A st.mmary ef. he meeting discussi:ns anc a lis: Of attendees is attached. A cc:y of the viewgra;ns ased by ne a: lican: Ouring nis resenta icns is also a-ichec,
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- See nex page THIS DOCUMENT CONTAINS POOR QUALITY PAGES '
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2 cc: w/o attachment H. Centon R. Mattson R. '/oll.mer F. Schroeder D. Ross D. '!assallo cc: w/3ttachment J. Kni;nt S. '/arga L. Rubenstein O. Lynch L. Heller F. Schauer J. Ma G. Lear R. Shevcaker E. Gallagher P. Barrett S. Golcberg
- 0. Thcmpson N. Gehring, CCE Detroit M. Davissen, Consultant W. Hall, Consultant POR Local POR P. Crane R. JacWn
PLANT SA"E: Bailly Nuclear i LICENSING STAGE: Post CP DOCKET NUMBER: 50-367 TAC NUMBER: 4764 MILESTCNE NUMBER: R-13 RESPONSISLE BRANCH: LWR-4; M. D. Lynch, LPM REVIEW STATUS: Staff Preparing Retuests for Information and Positions
SUBJECT:
Meeting with Applicant April 17 and 18, 1930 - Proposed Pile Foundatien Prepared by: Owen 0. Thompson, Geotechnical Engineering Section On April 17, 1930 a meeting was held at the offices of Sargent and Lundy, 55 East Monroe Street, Chicago. The list of attendees is attached. The ourpose of the meeting was to discuss with the applicant our positions and cuestions issued in draft form en April 11, 1930, in a letter from L. Rubenstein, NRC, to H. P. Lyle, NIPSCO. Cn April 13, 1930, nine of us (as indicated on the attendance list) visited the Sailly site. We also visited the Pcrt of Indiana and saw scre of the piles which had been installed for the Cargill grain elevator.
On April 17, 1930 we discussed each item fron the April 11, 1930 letter, as follows:
1.
The applicant presented data from the indicator pile program which show that penetration into the bearing layer is as significant a factor affecting pile capacity as number of blows on the last few feet of cenetration. Thus, the aoplicant proposed the following driving criteria:
500 blows for the last 5 ft or less of penetration 100 blous for the last i ft or less of cenetration 10 blows per inch for each of the last 3 in, or less of penetration at least 3 ft penetration into the : earing layer identification of the elevatien of the bearing layer from the driving record of the pile being installed.
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2 The staff agreed that the proposed criteria appeared to be acceptable contingent upon adequate d> cumentation by the applicant of the justification presented at the meeting.
l 2.
The applicant stated that all piles in the indicator pile program l
mest the proposed criteria. The CCE questioned this statement and the apolicant stated that scce of the indicatcr piles were terminated t
i short of acceptable criteria. The indicator piles in the reactor and radwaste buildings (56 piles out of 137 indicator piles) will be redriven 1
af ter the excavation has been extended to final subgrade. The COE will i
review the indicator pile records so as to be assured that all indicator piles meet the proposed criteria.
The applicant stated that freeze was observed for all redriven piles 4
i The COE stated that at least 4 of the redriven piles indicated that
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relaxation could have occurred. The applicant stated that logical explanations for the apparently anomalous behavior of some piles during redriving could be provided.
The CCE will request the applicant to evaluate the driving resistance of specific indicater piles during redriving.
3.
The applicant agreed to submit driving records for all piles to NRC with copies to NRR as requested. However, the applicant requested that acceptance of submitted information be provided by the en-site NRC insoector so that pile driving would not be delayed by the review precess. We agreed to clarify instances and procedures where this could be done. This problem aoplies to a number of NRC positions and requests for information.
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1 The applicant also agreed to centinuously reviea and modify, as necessary, the estimated elevation of the top of the bearing layer. This is needed to meet the driving criteria agreed to under 1 above.
4 The applicant agreed to ccmplete the soil dencificaticn program in each I
disturbed pre-construction area before driving production piles in that j
area, but again requested that acproval of satisfactory densificatien be I,
provided by the on-site MRC inspector. The applicant agreed to orovide i
us with the drawings showing pile locations, etc. We were told that the soil ensification program is completely cescribed in the sub6ittal dated August 14, 1979. The COE will review this document and determine the acceptability of the proposed densificiation program.
5.
The applicant accepted our recomnended tolerances except that hori: ental l
location tolerance of + 4 inches was requested based on experience in i
the indicator pile program. In addition, the applicant indicated that the greater tolerances permitted on no mere than 10 percent of all safety related piles should not apply to replacement piles because these must be offset from abandoned pile locations. The staff agreed to the changes requested by the applicant.
6.
The applicant agreed to provide a minimum vertical separation of 3 ft 4
for splices in adjacent piles. The applicant objected to a total prohibition against splicing in the upper 30 ft of piles.
The piles are furnished about 15 ft longer than the estimated length recuired but there is a possibility that an occasional pile may penetrate so deep that splicing would be necessary. Drivir.g an otherwise satisfactory pile to an excess penetration of as much as -30 ft, or abandoning satisf actory piles do not a: pear to be desireable or necessary. Thus, we discussed alternative
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criteria in which piles will not be spliced in the upper 20 ft but if such a splice cannot be reasonably avoided, the structural engineer will approve each such pile by the l'CR proce 'ure and he will assure that subsequent oc piles will, furnished in greater lengths so that adjacent piles to the TiCR pile ar: not soliced in the upper 20 ft.
7.
The applicant agreed to cccoly with ACI 318-77 and ASME Section 3, Civision 2 or other acceptable structural codes for field bending of reinforcing bars.
8.
The applicant stated that the problem of disturbing shallow soils while pulling a non-conforning pile occurs only when the pile tip extends into clay at abcut EL-10. The staff indicated that their concern was to ensure that soil disturbance due to pulling a pile would be pecperly repaired. The applicant agreed to provide criteria for recompacting the soil, if necessary, after a pile is pulled.
9.
The acclicant stated that generic qualificaticns of pile inspectors would be provided to ilRC but that if individual cualifications had to be approved by TiRR, there could be delays in pile driving, such as when an inspector terminated employment. The staff agreed to consider this problem.
- 10. The applicant stated that all piles within a 35 ft radius of each pile being driven would be redriven if the heave was greater than 0.5 inches.
In this way, the heave on any pile was predictec to be less than 1 inch at the end of the job. The staff disagraed witn the maximum I inch heave limit; it wac the staff's posi-icn that final heave must be less than 0.5 inch. The acpiicant stated that sach a limit wculd require receiving cost, if not all piles. The staff stated that many piles wculd recuire receiving even with a 1 inch maximun
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i heave criterion and if any piles had more than 1 inch heave at the end of the job, load testing or other qualification procedure would be I
necessary. On the other hand, using the criterion of less than 0.5 inch heave at the end of the job, it is reasonable to ex0ect that a few piles showing heave in the 0.5 inch to 1.0 inch range could be accepted on the l
basis of disposition of an NCR by the structural and/or geotechnical i
engineer. The staff stated that they would review this item in light of the applicant's statements.
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- 11. The applicant agreed to make the settlement readings as repuested by l
NRC.
In addition, monuments would be placed in each portion of the mat as it was being poured and elevations would be recorded during mat construction.
- 12. The acplicant agreed to perform the long term (96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> minimum) load tests in accordance with our re;uest. The applicant requested that the tests be done early in the piling program and we agreed. The a;plicant suggested that the maximum load should be 300 Tons which tney indicated was at Itast twice the sum of dead icad plus live load.
- 13. The applicant stated that scne of the load tests recuested could not be done. The staff agreed to discuss the required load tests with the applicant and to jointly develoo an acceotable number of appropriate tests.
14 The acplicant agreed to include in the QC program the requirement to document 7
cushion behavior by a eneck verifying that the cushion thickness is i
i within specifications. Cr. Davisson suggested that periodic set-graph records also would be helpful in documenting driving energy input.
- 15. The applicant agreed to provice su: cort facilities and services for the l
1RC pile inspector.
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- 16. The applicant presented a bar graph of the construction schedule.
Backfilling around closely spaced piles is to be performed by hand j-but details were not provided to us. We were told that the piles j
near slopes will be driven in a sequence proceeding toward the i
slope and no movement of piles near temporary slopes is excected.
Dr. Cavisson suggested that a contingency plan be developed in the event of movement,as well as justification for establishing an acceptable a
amount of movement. Results should be provided to NRC for review and acceptance. The aoplicant stated that temporary sheeting and shoring i
i details will be developed by the contractor. The staff stated that we need to review the criteria to be used by the contractor and the locations I
of such sheeting and shoring. The applicant stated that only in a few small sump pits will piles be driven frcm an elevaticn above final subgrade. The staff cccmitted to provide the applicant with a specific request for information regarding construction details.
- 17. The aoplicant agreed to provide us with calculations showing the effect: of II temporary surcharge cr F e capacities.
- 15. The applicant stated that damage to pile butts was not expected to be a problem and _ any significant damage would be immediately apparent to the inspector and contractor. Nevertheless, the applicant agreed to develop l
simple field criteria which will show that pile butts are not excessively
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bent or damaged curing final driving. Dr. Davisson suggested that j
l set graphs could be used to show that the pile butts are acceptable.
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t 0 19. The referenced letter dated April 11, 1980, did not contain item 19.
However, we discussed the need for monitoring piezcmetric levels in the clay layer during and after driving of piles. We also discussed the need for groundwater monitoring. The staff agreed to provide the acplicant with specific requests for information regarding these matters.
The staff informed the applicant that the items requiring clarification would be discussed by conference call within about I week and formal Staff Recuests for Information and Staff Positions wculd be submitted to the applicant within about two weeks.
"pril 17, 19S0 - Attendance List T. A. McKenna S&L R. J. Bahn MIPSCO pc
- 0. Koutsoftas Dames & Moore se J. N. Paulsen SLL X
M. L. Keifer Cames L "ocre
'e Owen Thcapson
';RC-NRR-Geosciences Jonn 5. 'ta
.;RC-NQ?- Structural M. T. Davisson Consultant to NPC R. J. Vollen SP!
M. J. 'Aurray Atty Gen.
Susuan N. Sekuler Ill. Att. Gen.
fc W. C. Otto Corps Eng., Detroit W. H. Eicnh Atty-NIPSCO E. Barnett CF 3raun M. T. Massel NIPSCO S. Goldberg NRC-CEL3 L. Heller NRC/NRR/GS3 R. Erickson Corps of Engineers N. A. Gehring Corps of Encineers Adam Shanba i NIPSCO Alan Severance NIPSCO J. W. Simoson C of E Nortn Central fr John F. Norten C of E North Central John Grundstram C of E, Detroit Dist.
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,e Peter Kytasty C of E, Detroit Dist.
9p Thomas Wysoc.<ey ihotcher Engineering Corp.
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%p'ge. Abe f**cc.,t a t sik m eGy
Tem Seeley S&L Carl W. Peterson S&L Joseph A. Diceck S&L QCD Daniel G. Badine S&L Glen A. Chauvin S&L Lymen C. F.eese Danes & *'ccre
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