ML20073L750

Comments on Evaluation of Soil & Rock Slopes at Plant Site, Per Interagency Agreement.No Offsite Slopes Identified Which Would Affect Safety of Seismic Category 1 Sys

ML20073L750
Person / Time
Site:	Limerick
Issue date:	04/15/1983
From:	Frederick Brown ARMY, DEPT. OF, CORPS OF ENGINEERS
To:	Lear G Office of Nuclear Reactor Regulation
References
CON-NRC-03-82-102, CON-NRC-3-82-102 NUDOCS 8304210236
Download: ML20073L750 (2)

Text

JEPARTMENT OF THE ARMY LTERWAYS EXPERIMEP' ' STATION. CORPS OF ENGINEERS O BOX 631 VICKSBURG. MISSIS $1PPI 39160 Eir$N o, April 15, 1983 WESCR Mr. George E. Imar Hydraulic and Geotechnical Engineering Branch Division of Engineering U. S. Nuclear Regulatory Commission Washington, D. C.

20555

Dear Mr. Lear:

Reference Interagency Agreement No. NRC-03-82-102 under which the Waterways Experiment Station is providing support to the Nuclear Regulatory Commission staff in evaluating the soil and rock slopes associated with the Limerick Generating Station plant site.

We have visited the Limerick Generating Station site and have reviewed information presented in the Limerick Generating Station, Units 1 and 2, Final Safety Analysis Report, through Revision 18, and other documents and data necessary for evaluating the stability of the station slopes. Based upon the results of our analyses we find the following:

a.

There are no off-site slopes at the site which affect the safety of any seismic Category I plant facilities.

b.

The side slopes of the spray pond represent the only seismic Category I slopes at the site.

c.

Our analysis of the as-constructed soil and rock slopes at the spray pond site indicate that there is an adequate margin of safety against slope failure under both static and a postulated dynamic (pseudo-static) safe shutdo o earthquake loading condition.

Our analysis further suggests that any hypothetical slope failure would not result in a significant loss of cooling water or pose a significant threat to the seismic Category I spray pond system.

8304210236 830415 PDR ADDCK 05000352 A

PDR

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Details of our analysis procedures and of our specific find-

_ings are being submitted under separate cover.

If we can be of further assistance, ple'ase contact Mr. W. C. Miller, FTS 542-3147.

'f 2

Sincerely,

.[

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F. R. Brown Engineer

, Technical Director

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Copies ' Pbrnished : '

Dr. Lyman lieller, NRC Dr.'J. R. Pearring, NRC r

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