ML20206G404
| ML20206G404 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/04/1988 |
| From: | NRC OFFICE OF SPECIAL PROJECTS |
| To: | |
| Shared Package | |
| ML20206G037 | List:
|
| References | |
| NUDOCS 8811220264 | |
| Download: ML20206G404 (1) | |
Text
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d % UNITED STATES i
c y . j ij NUCLE AR REGULATORY COMMISSION W A$mNO TON. D. C. 20655 s . . .... .f .
SAFETY EVALUATION REPORT BY THE OFFICE OF SPECIAL PRORCTS EMPLOYEE CONCERN EttMENT REPORT CO 10107 I "BACKFILL WITH 1632"
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TENhESSEE VALLEY AUTHORITY SEQUOYAk NUCLEAR F0WER PLANT UNITS 1 & 2 DOCKET NOS. 50-327 AND 50-328 i
!. Subfect ;
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! Categcry: Construction (20000) i
' Subcategory: Soils (10100) i Elerent: Eacktill with 1032 (C0 10107) ;
The basis for Element Report C010107-SQN (Rev. 2) dated 10-15-86 is Sequoyah l Employee Co.mcern JAN 56-CC2 which states:
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- Excavation for DAW building foundation revealed red elay, various size rocks, etc. that were usea as a backfill material for the storage yard. ,
if building founcation is constructed without removing backfilled [
material, an uneven settlement of building could occur." j II. Sumery of Issue ;
Tha Sequoyah (SON) Lry Active Waste (DAW) building was being constructed on \
J unsuitable backfill r:aterial that could result in uneven settlement. l r
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i 4 111. Evaluation ;
1 TVA said that the decision was made that to remove the existing material and [
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backfill with 1032-crushtd stone prior to building the foundation. This work [
j was perforced by TVA ano as the building was classified as non-QA, the mater- [
s ial was randomly inspected by engir.eers, not QC inspectors. The concerned j l individual was contacted by TVA, and the evaluation report indicates that he was satisfied with the corrective actions taken, i 1 j
!Y. Conclusien I FSAk Secticn 3.2, "Seismic Classification of Strur.tures, Systens and Compo-
) i nents," incicates that the building is not classified as a Seismic Category I i structure. The building is catecerized as non-seismic ano does not recuire l j
r t.c le a r g r a :e c u e l l t,, c.s:uram s (rer.(A). Becaust of the classificaticn of tne builc;q. tr.s stai: :.oncl.. C tra? trere is no need to assess the .
tr.tegrity of the foundation which is outs 1ce of the crea of staff regulation.
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I 8811220264 881104 i PDR ADOCK 05000327 P PDC l
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