ML19257A801
| ML19257A801 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/17/1979 |
| From: | Rolonda Jackson Office of Nuclear Reactor Regulation |
| To: | Rubenstein L Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8001080604 | |
| Download: ML19257A801 (3) | |
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'D TRIBUTION:
. CKET FILE (50-327/328)
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UE::CRN: cub FCR:Lester A. Rubenstein, Acting Chie'f Light Water P.eacters Branch i'o. 4. CP" FRC?':
Pobert E. Jackson, Chief Geosciences Branch, DSS EUBJECT:
U::RESCL'/ED GECTECH"ICAL E:nI"EEP.I"G ISSUES PLET "A"E:
Sequoyah ::aclear Plant LICEMSI.'.G STAGE: CL CCC::ET ::UFCER: 50-327/320 RESPC:.SICLE 2RN:CH: LUR-4; C. Stahle, LP !
PECUESTED CC"PLETIO': DATE: ?:ot Scheduled APPLICA::TS RESP 0:.SE DATE: "ot Scheduled LESCRIPTIC" CF RES?CMSE: 'Jrovide Rougested Infer ~ation 2.E'!IE'i STATJS: Continuing
- le have revicued the responses to the Geosciences 3 ranch trans~.itted by your 11
- tar fror L. :t. 'ti'is'of the Tennessee Valley Authority to you en Saptember 12,10"2.
On the basis of this review the enciesed geotechnical engineering revieu cc~ ents have been prepared by J. Kar.e, GES, 03.
The enclosed cem ents identify significant deficiencies in the desi c of the pile foundations for two Catecery I structures, the Condensate Cerincralizer
'laste Evaporatory Building and the 'laste. Packaging Area. As indic2ted in our Dece ter 12, 1979 coetinq these itens have been verbally discussed between J. Kane of ny staff and Ergineering Division personnel freri T!A in telephone calls en Ceccrter 5 and 10, 1970.
It is our understanding 7"A plans :o provide the requestad informatica during the week of Decenber 17, 1979 and uill incl:.,de t'ieir recomendations for satisfactorilycrp.saly.im;1tir design and construction croblea.
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Geosciences 3 ranch Divisicn of Systems Safety 1745 273 6
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SEQUOYAH NUCLEAR POWER PLANT TENNESSEE VALLEY AUTHORITY DOCKET NO. 50-327/328 UNRESOLVED ISSUES - GE0 TECHNICAL ENGINEERING PREPARED BY:
J.D. Kane, GES, GB, DSS 362.14 The estimated maximum pile loads to be imposed on the Waste Packaging Area and the Condensate Demineralizer Waste Evaporator Building provided in Table Q2.74-2 exceed the pile capacity which would be available if the driv-ing criteria of 3 blows per inch (Table Q2.68-1) was actually used in the field to control pile driving operations.
Please provide the actual pile driving records and pile load tests for all Category I structures founded on H-piles.
If the field records that are available can not demonstrate a pile capacity which is capable of safely supporting the maximum pile loads to be imposed, please provide a proposed plan for remedial treatment with details that will assure an acceptable margin of safety during opera-tion of the involved structures for NRC staff review and approval.
362.15 The apparent omission in the present FSAR concerning a discussion on the procedures and assumptions used in the dynamic analysis of structures fcunded on piles and caissens should be corrected. A discussion should be provided and important properties adopted for the foundation soils and piles should be identified along with the basis for the selected values.
The impact af changes (e.g. shear wave velocity) on design safety from presently reported FSAR information should be evaluated and discussed.
1745 274 M
. 362.16 Indicate what portion of the maximum loads provided in Table Q2.74-2 re-present negative skin friction.
362.17 Please clarify the discussion in the third paragraph of response to Q2.76 (362.11) concerning allowable and minimum lateral loads.
1745 275
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