ML18059B136

Forwards Rev 0 to EA-SC-93-083-03, Dry Cask Storage - Vcc Tile Strength.

ML18059B136
Person / Time
Site:	Palisades
Issue date:	08/05/1994
From:	Rogers D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML18059B137	List: ML18059B136 ML18059B138
References
NUDOCS 9408150305
Download: ML18059B136 (2)

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• NATIONAL LABORATORY ASSOCIATED UNIVERSITIES, INC. P.O. Box 5000

\'._:~. :~*7: ~~.':' Upton, New York 11973-5000 TEL (516)282- 2317 FAX (516) 282- 4255 Department of Advanced Technology E-MAIL May 13, 1994 Dr. Raman Pichumani Mail Stop OWFN-7H15 Civil Engineering & Geosciences Branch U.S. Nuclear Regulatory Commission Washington, D.C. 20555-00~~ _

Subject:

FIN J-2042, Task No. l, Deterministic Evaluation of Liquefaction Potential of Foundation Soils, and its Effects, at the Independent Spent Fuel Storage Installation (ISFSI) Pad at Palisades

Dear Dr. Pichumani:

We have completed Task No. 1 of the subject task order and are currently performing Task No. 2.

The level of effort for Task No. 2 was originally estimated to be eight (8) days.

This estimate was based on the assumption that BNL would perform simplified analyses to verify the factor of safety against liquefaction and to confirm the stability of the slopes in the vicinity of the pad. Our initial analyses have identified the possibility of liquefaction in a soft soil layer beneath the pad. Although our calculations indicate that this may have a minimal effect on the settlement of the pad, the liquefaction potential may also- effect our conclusions-with regard. to the stability of_ the_ slopes. Therefore,

• further stability analyses of the slopes in both the north-south and east-west directions are required to resolve this issue. These analyses will assess the potential for deep failure surfaces which could intersect the liquefiable layer. We estimate to perform these analyses that an additional eight (8) days of effort will be required to complete Task No.

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Letter to Dr. Raman Pichumani May 13, 1994 Page 2 In summary, based on the above information we request that the cost ceiling of the subject task order be increased from $20,000 to $28,500 to fund the additional estimated level of effort.

We would appreciate your immediate attention to this matter so that we can fully support. the public meeting which is scheduled-for May 23, 1994. -* * **

Sincerely yours,

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Charles H. Ho~:;

Deputy Division Head Engineering Research and Applications Division CHH:BJR cc: G. Bagchi, NRC H. Ashar, NRC B. Grenier, NRC M. Bonner, BNL M. Reich, BNL C. Costantino, BNL N. Simos, BNL