ML19340C326
| ML19340C326 | |
| Person / Time | |
|---|---|
| Site: | Bailly |
| Issue date: | 08/09/1978 |
| From: | Lynch M Office of Nuclear Reactor Regulation |
| To: | Boyd R, Varga S, Vassallo D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19340C304 | List: |
| References | |
| NUDOCS 8011140512 | |
| Download: ML19340C326 (1) | |
Text
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NUCLE AR nEGULAlliRY CO*.1*.11sslON WASHi*.GioN O' c 20555
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- .s, August 9,1978 Docket tio. 50-367 flote to:
S. A. Varga D. B. Vassallo i
R. C. DeYoung R. S. Boyd
SUBJECT:
STATUS OF BAILLY INDICATOR PILES As of C08 Tuesday (8/8/78), NIPSCO has driven a total of 10 indicator piles (3 on Monday and 7 on Tuesday), on an E-W line through the auxiliary building. Two of the piles failed to " bottom out" within the extra 10 feet on the piles indicating a " soft spot" at least 10 feet deeper than expected. Tentatively, these piles will be left in the ground and abandoned.
Longer piles will be driven in the vicinity of this apparent
" soft spot" to determine its extent.
Lyman Heller (Section Leader, GSB) is in the field observing on Tuesday and Wednesday.
Our consultant from University of Illinois. Tom Davison, was at the site on Monday and will be back there later.
With respect to the " soft spot," I don't believe it is any major problem.
In fact, the staff required indicator piles to search out such anomalies.
A number of options are available in the vicinity of the auxiliary building since this will not be as densely packed with piles as the reactor building will be.
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g,d M. D. Lynch, Project Manager
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Light Water Reactors Branch 4 Division of Project Management Dist.dbution:
,W. Stepp C. Hofmayer H. Polk J. Greeves LUR-4 Reading Docket file 1
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IUnethcen Indiana Public Service Company l}
cowai c.*:ss j 5265 Hohman Aenue l Hammond Indans.:5325 lTe': E!3520012191 CUGCNC M $MORS r..., v.c c.. c s. o c.,,
August 14, 1079 Mr. Dominic B. Vassallo, Acting Director Division of Project Management Office of Nuclear Reactor Regulations U. S. Nuclear Regulatory Commission Wa shington, D. C.
20555 Re:
Northern Indiana Public Service Company Bailly Generating Station - Nuclear 1 Docket No. 50-367
Dear Mr. Vassallo:
Your letter to NIPSCO dated June 28, 1979, requested additional informa-tion in support of the Bailly piling proposal with regard to the following thre areas: (1) an acceptable proposal for correcting the preconstruction (2) selection of representative production piles for load testing; ar.as; and (3) a sheeting and bracing plan to minimize pile disturbance adjacent to the deeper excavation planned for the reactor building.
Our letter to you dated June 29, 1979, delineated the reports and responses that have been previously submitted on this subject matter and also transmitted " Supplementary Information, Clarifications, and Alterna-tives to the Foundation Pile Design", which provided additional information relating to items (1) and (2) above.
Our responses to your requests for information are completed in the attached brief report titled " Response to NRC Requests for Information of June 28, 1979. " As you will note, items (1), (2) and (3) are covered under the portions titled " Program for Densification of Preconstruction Areas",
" Production Pile Load Testing" and " Category I Building Excavation and Pile Driving Sequence" respectively. We believe that we have satisfactorily addressed each of your stated concerns.
In addition, as suggested in the last paragraph of your It iter, we have given careful consideration to the thoughts expressed in your letter and can assure you that the Bailly safety-related piles will be designed, tested, and by e-
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- e Mr. Dominic B. Vassallo, Acting Director Division of Project Management Hammond, Indiana i
U. S. Nuclear Regulatory Commission August 14, 1979 Page Two installed in accordance with high construction industry standa d remain confident that the three reports which we have submitted on the r s.
We shorter piles proposal are well documented and thoroughly justified Since the reports were submitted over some months while refinements were being made in response to NRC questions and suggestions now reviewing the documents and will advise you promptly of any modifi-
, we are cations needed to conform each of the reports fully to the current detailed pile proposal.
We have now provided all of the requested information and would a early completion of your review so that we may resume installation of th ppreciate 4
pile s.
e Very truly yours, s
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