ML20049J087
| ML20049J087 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/02/1982 |
| From: | Sells D Office of Nuclear Reactor Regulation |
| To: | Powell M HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 8203120034 | |
| Download: ML20049J087 (5) | |
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Mr. Michael E. Powell E
Houston Lighting & Power Company P. O. Box 1700 c,
Houston, Texas 77001 9
Dear Mike:
As promised in our recent telephone conversation, I am enclosing the document list and suggested presentation outline for the meetings concerning plant backfill.
Current plans call for the Headquarters representatives (L. Heller and D. Gupta) to fly to Houston on March 29 and go directly to Bay City.
They plan on spending the morning of March 30 (Tuesday) touring the site and looking at what records you may identify as being located there.
They'll return to Houston tha't afternoon and spend all day Wednesday (March 31) looking at the records in Houston.
I think the suggested outline for the WCC presentation covers Thursday (April 1).
If more time is required beyond Thurs' day afternoon to answer questions, we will be prepared to continue on Friday (April 2) morning.
J. Tapia from Region IV is expected to join us in this review.
R. Landsman of Region III may also join the group.
My current plans call for me"to fly to Houston on March 31 to attend the WCC presento.tbi ois April 1.
I currently plan to leave Houston on the Friday afternoon flight to Baltimore. This will provide me with an opportunity to observe transition activities at your new location.
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I will be putting out a meeting notice in the near future and will need-to know the location for the Houston activities.
If you have any questions or comments, give me a call.
Sincerely, r
Originalsigned byt Donald E. Sells, Pmject Manager
- Licensing Branch No. 3 Division of Licensing PDR FMiraglia GLear WHill, Res. Inspector,'
NSIC DSells LHeller STP DISTRIBUTION:
TERA JCollins DGupta Docket File 50=498/499 LB#3 Files JKnight JTapia, RIV LPDR RLandsman, RIII 8203120034 820302
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Docket Nos.:
50-498/499 South Texas Project
Subject:
List of Documents to be Audited by the NRC Staff at' March 29 - April 2,1982 Audit in Houston, Texas Review Issue Documents Anticipated to be Presented to the Staff Backfill placement In place backfill density test measurements
)
identifying location, depth, procedure, laboratory maximum and minimum density data, relative density
)
calculations and conclusions.
Statistical Analyses of Method, graphical representation of density Backfill Densities distribution within backfill, conclusions.
Review of placed backfill Field boring logs (1980) showing soil strata, characteristics N values and other pertinent information.
Summary of results and conclusions.
Liquefaction Analyses of Detailed calculations including description Deficient Areas of procedure assumptions, data source, input
- Assumptions data used for the analyses, ground water table,
- Input parameters results of lab data, field data, computer
- Design Groundwater table outputs and conclusions.
Justification for
--Lab Data criterion and assumptions used in the analyses.
- Field Data
- Computations / Computer 0utputs l
_2 P.eview Issue Documents Anticipated to be Presented to the Staff Settlement Data Location of settlement monuments, heave and recompression data.
Up to date field settlement data, differential settlements, plots, conclusions,
..h Other pertinent infonnation To be provided by HL&P.
Include drawings
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related to demonstrating the illustrating excavation and backfill profile, adequacy of plant backfill, plant layout, plan and cross-sections showing routing of category I buried pipelines and electrical conduit duct banks, with bedding and backfill details.
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Docket Nos.:
50-498/499 South Texas Project
Subject:
Suggested Outline for Presentation by WCC to t1RC on 4///32 (9:00 am to 12:00 noon)
Plant Backfill Evaluation South Texas Project i
1.
ORIGIriAL SUBSURFACE C0tlDITI0 tis AT SITE 5 minutes 2
2.
DETAILS OF EXCAVATION, BACKFILLIrlG, BORROW AREAS, BORROW MATERIALS 5 minutes 3.
PLANT LAYOUT 5 mint 1)
Bldg Dimensions ii) Static & Dynamic Load Intensity /All Cat I Structures iii) Thickness of Backfill /All Cat I Structures Underneath the Structures iv) Design Groundwater Table v) SSE & OBE
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vi)
Plant Profile of Cat. I Buried Pipes & Conduits (Bedding and Backfill Procedures and Specifications) 4.
CHRONOLOGICAL HISTORY OF PROBLEM (PLANT BACKFILL ONLY) 15 minutes i)
IE Shcw Cause Order ii) Task Force Activities iii)
Independent Review Committee Activities iv) Resolution of Items v) Open Item Details (Liquefaction Potential Evaluation of Identified Deficient Areas and Underneath Mat Foundations) 5.
S0ll DENSITY DISTRIBUTION WITHIN BACKFILL 10 minutes i)
Placement Specifications li) Details of In-Place Density Measurements During Placement.
(Method, locations, Depth, Freq, Results) iii) Statistical Analyses of Field Data iv)
I&E's. Concerns v) Resolution of Concerns
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BORIflG IfiVESTIGATIONS (1980) 25 minutes i) Details of Boring Program (No., Location, Depth, Procedure) li) Details of SPT Program, I&E Concern for ik 1conformance, Resolution of Concern.
iii) Justification for Adequacy of the Extent of (10 minutes)
Boring Program iv) Boring and SPT Data and its Discussion 7.
DEFICIEllT AREAS 15 minutes
)
i) Discussion of Areas ii)
Location of. Areas with Respect to Cat. I Structures, Pipes and Conduits.
iii) Extent of Deficiency
)
iv) Possible Consequences of Deficiency v) Basis for Conclusion that all Potentially Deficient Areas Have Been Identified and Their Possible Effects on safety analyzed.
8.
LIQUEFACTION POTEf4TIAL EVALUATION 30 minut es i) Description of areas (Around and underneath the
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mat foundations) analyzed for liquefaction potential ii) Procedure Used iii) Modeling iv)
Input Parameters v)
Laboratory Testing and Results vi)
Field Geophysical Testing and Results vii) Assumptions in Modeling, Input etc.
viii) Details of Computations ix)
Results and Conclusions x)
Possible Consequences of Liquefaction of Deficient Areas.
9.
ANALYSIS OF P0TENTIAL DEFICIEtiCY UNDERNEATH THE MAT FOUNDATIONS 10 minutes
- 10. UP-T0-DATE SETTLEMENT EXCAVATION, HEAVE AND RECOMPRESSION DATA /
30 minutes ALL CAT. I STRUCTURES Analysis of allowable and measured differential settlements.
- 11. BURIED PIPING AND CONDUITS PROFILE AND RELATIONSHIP 10 minutes' TO DEFICIENCY,
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