ML20004C291
| ML20004C291 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/19/1981 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Oprea G HOUSTON LIGHTING & POWER CO. |
| Shared Package | |
| ML20004C292 | List: |
| References | |
| NUDOCS 8106020504 | |
| Download: ML20004C291 (1) | |
See also: IR 05000498/1979019
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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May 19, 1981
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Zn Reply Refer To:
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Dockets 50-498/Rpt. 79-19
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50-499/Rpt. 79-19
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Houston Lighting and Pcwer Company
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ATTN: Mr. G. W. Oprea, Jr.
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Executive Vice President
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Post Office Box 1700
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Houston, Texas 77001
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Gentlemen:
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Thank you for yo.tr letter of December 17., 1980, which transmitted an
interim report concern.1 backfill material and status of the structural
backfill investigation in .asponse to the NRC Order to Show Cause, dated
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April 30,1980. We will review this documentation and implementation of
corrective actions during fut"re inspections.
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Sincerely,
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W. C. Seidle, Chief
Engineering Inspection Branch
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The Light
Company soo,,oo tis iing & gos ,
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e.o. sex iroo soo,,on.1,x2,77001 (713) 228-9211
December 12, 1980
ST-HL-AE-583
SFN: V-0530
Mr. Karl Seyfrit
Director, Region IV
Nuclear Regulatory Comission
611 Ryan Piaza Orive, Suite 1000
Arlington, Texas 75012
Dear Mr. Seyfri :
South Texas Project
Units 1&2
Docket Nos. STN !.J-498, STN 50-499
Third Interi- Pport Concerning
Backfill tiater y; and Status
Concernirg Shcw Cause Item 2
Structural Backfill IrvesticItton
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On March 21, 1980, cursuant to 100F050.55(e), Hcusten Lignting i Power Cemeany
notified ycur office of an item ccncernin; certain non-conferring backfili material
areas located arounc the Souts Texas Unit n2 ocwer bicck. Tne intent Of this recert
and its attach:rients M to ::rovide a status on the structural
b._f. fill investiga:icn
and to address various related tasks wnicn have osan prev 1cusly icentifiec *.o youe
o f fi c.c . The attac.100 Indace m n: Review Ccemittee recort sucolc~er.ts tne crevic;s
Ocemittee interim recort, anicn was sucmitted as Exnici; 9' in our Re:conse to tne
Ords- to Shcw Cause, July 23., 1960. Ini: 5tatus rapert provides discussiens
concluding the folicwing 3;ecific activities.
Activities Ccmciated 3y The incenendent Review "c=i . ee
The following tasks identified on 03.2-5 and 2-6 of the Shcw Cause Order recly
have been ccepleted:
1.
Revie,ving inoratory tests and design inalyses :erfor .ad on the backfill
Concerning liquefGCticn lfid settlement.
Ccmoleted; see section 3.1 of Status Report.
2.
Reviewing the recnenda-ion 3nd criteria far ccm action o# to? Oacdill
as cocumen ed in i series of geot+chr.ical eng:Hering reports is:ued cy
'codward Cljde Consd tants '"CC}.
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Complet:d; we tact on 3..' .:f 5ts:us ;epcet.
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8106 02 0 h)
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Houston Lighdng & Power Company
December 12,1980
ST-HL-AE-583
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SFN: V-0530
Page 2
3.
Reviewing the construction specifications and procedures for ccmoaction of
the backfill, including the actual construction and quality control methods
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employed in the field.
Completed; see section 3.3 of Status Report.
Rev ewing the prescribed and implemented inspection and testing procedures
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for compaction control of the backfill placement, including the quality
control methods .nd documentation implemented in the field.
The Committee has finished the review of the procedures, and has found them
satisfactory. The task will be completed when the Task Force Review of the
quality control records becomes available (see item 5, below).
5.
Reviewing and analyzing comcaction quality control test results collected and
documanted covering the construction period from 1976 to 1980.
This task remains open pending the Task Force comol'etion of the quality
control documentation review and ccmpilaticn.
6.
Reviewing the results of special investigations of the placed backfill to assess
adherence to the design requirements, including the results of the test boring
program performed during the spring of 1980.
Completed; see section 3.6 of Status Report.
7.
In the event low density pockets are deliciated in the backfill, reviewing the
efficiency of the methods proposed by B&R Engineering to treat those pockets
to bring them into conformance with the design requirements.
Complete as no remedial work is required; see section 3.7 of the Status Report,
and close out of the structural backfill boring investigation findings
pertaining to the low density indication west of the Unit 2 Reactor Containment
Building, as discussed below.
8.
Inspecting the on-site laboratory facilities and equipment used oy the existing
testing agency, and reviewing the laboratory test procedures.
Completed, see section 3.8 of Status Report.
9.
Reviewing the precedures, observing field operations, and evaluating tne results
of the test fill program.
Ccmpleted, see section 3.9 of Status Report.
P00R ORIGINAI.
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Houston Lighting de Power Company
December 12, 1980
ST-HL-AE-583
SFN: V-0530
Page 3
Low Censity Indications: Construction Deficiency
Borings with Standard Penetration Tests obtained by Woodward-Clyde , Consultants
(WCC) in January-February 1980, gave indications of densities below the
construction quality control criteria in an area near the subgrade west of the
Unit 2 Reactor Containment Building. The area was subject to further investiga-
tion by borings obtained in March and April ,1980.
WCC has made a final evaluation of the test results has studied the validity
of the test methods. WCC's report dated September 30, 1980 is attached.
The field investigation and test results have prcviously been evaluated by the
Independent Review Committee as discussed in sections 2.8 and 4.0 of the
Committee's Interim report (Exhibit 9 to the July 23, 1980 response to the
Order to Show Cause). WCC"s final evaluation confirms that the test data is correct,
and also that the density of the backfill is satisfactory. The same conclusien
is also reiterated in Section 3.7 of the Committee's status report. There is
accordingly no need for any remedial work.
The status report also addresses the ongoing work by the task force. The final
Committee assessnent of these items will be contained in the comprehensive
report currently scneduled for submittal in February,1981.
If there are any questions, please contact Mr. Michael E. Powell at (713) 575-
8592.
Very trug yqurs,
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d Execd.ive 'liWPresident
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Attachments
200R ORIGINAL.
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Houston Lighting & Power Onnpany
December 12, 1980
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ST-HL-AE-583
SFN: V-0530
Page 4
cc:
J. H. Goldberg
D. G. Barker
Howard Pyle
R. L. Waldrop
H. R. Dean
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D. R. Beeth
J. D. Parsons
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G. B. Painter
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L. K. English
A. J. Granger
R. A. Frazar
H. S. Phillips
(NRC)
il. O. Read
(Read-Poland,Inc.)
M. D. Schwar:
Baker & Botts)
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R. Gordon Gooch
Baker & Botts)
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J. R. Newman
Lowenstein, Newman, Reis, Axelrad & Toll)
Director, Office of Inspection & Enforcement
Nuclear Regulatory Cormission
Washington, D. C. 20555
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P00R ORIGINAL
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Houmin Ughting & Power Conipany
December 12,1980
ST-HL-AE-583
SFN: V-0530
Page 5
M. L. Borchelt
Executive Vice President
Central Power 5 Light Company
P. O. Box 2121
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Corpus Christi, Texas
73403
R. L. Range
Central Power 5 Light Company
P. O. Box 2121
Corpus Christi, Texas
78403
R. L. Hancock
Director of Electrical Utilities
City of Austin
P. O. Box 1088
78767
T. H. Stuehlenbeck
City of Austin
P. O. Box 1088
73767
J. B. Poston
Assistant General Manager of Operations
City Public Service Board
P. O. Box 1771
San Antonio, Texas
73296
A. vonRosenberg
City Public Service Board
P. O. Box 1771
San Antonio, Texas
78296
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Houston Lighting & Power Company
December 12, 1980
ST-HL-AE-583
SFN: V-0530
Page 6
Charles Bechaefer, Esquire
Chairman, Atomic Safety & Licensing Board
U. S. Nuclear Regulatory Ccmmission
Washington, D. C. 20555
Dr. James C. Lamb, III
313 Woodhaven Road
Chapel Hill, North Carolina 27514
Dr. Enneth A. Luebke
Atomic Safety & Licensing Commission
U. S. Nuclear Regulatory Commission
Washington, D. C. 20555
Citizens for Equitable Utilities
c/o Ms. Peggy Buchorn
Route 1, Box 1684
Brazoria, Texas 77422
Pat Coy
Citizens Concerned About Nuclear Power
5106 Casa Oro
San Antonio, Texas 77422
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Betty Wheeler
Hoffman, Steeg & Wheeler
1008 S. Madison
Amarillo, Texas
Brian E. Aerwick
Assistant Attorney General for the State of Texas
P. O. Box 12548
Capitol Station
Bernard M. Bordenick
Hearing Attorney
Office of the Executive Legal Director
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U. S. Nuclear Regulatory Commission
Washington, D. C. 20555
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CONSULTANTS
Wimn L snannon. P L
stanaev O. wieson. P.L
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SHANNON & WILSON,1NC.
Geotechnical Consultants
1105 North 38th Street Seattle, Washington 98103 Telephone:(206) 632-8020 + Cable: GEOSAW
October 27,1980
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SHR-1000-02-0
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Brown & Root, Inc.
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P.O. Box Three
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Houston, Texas 77001
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Attn:
Mr. J. L. Hawks
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Engineering Project Manager
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EXPERT COMMr1 TEE'S STATUS P2 PORT ON
ADEQUACT OF CATEGORY I STRUCTURAL BACKFILL
SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION
Gentlemen:
Mr. Wilson, the Expert Committee's chairman, has asked me to transmit 10 copies of
the above referenced report to you.
Sincerely,
SHANNON & WILSON, INC.
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Thomas E. Kirkland, P.E.
Principal Engineer
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