ML20009E955
| ML20009E955 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 06/04/1981 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20009E945 | List: |
| References | |
| ST-HL-AE-681, NUDOCS 8107280567 | |
| Download: ML20009E955 (5) | |
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The Light C o ttt P H Y ii""""i.ix'i"x&i" << i o ii"'i7""ii"""".Tcx"'77""i<7's>228-"2ii n
June 4, 1981 ST-HL-AE-681 SFN:
C-0570 Mr.
G.
L.
Madsen, Chief Reactor Project Branch U.S.
Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012
SUBJECT:
SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION RESPONSE TO NRC INSPECTION FINDINGS DOCKET NOS. 50-498/81-10 AND 50-499/81-10
Dear Mr. Madsen:
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The following is our response to the Notice c'. Violation relating to Inspection Report, Nos. 50-498/81-10 and 50-499/81-10 dated May 7, 1981, " Failure to Test for Air Content in Grout".
Based on a review of the applicable codes and standards including their current revisions, our specification requirements, and the function of grout to butter the slickline and as a slush coat at construction joints, we have reverified that in-process testing of air-content in this type of grout is not a requirement and accordingly failure to perform periodic air content tests does not constitute a " violation" and does not in itself degrade the confidence level of the grout quality.
We wish to clarify this position as follows:
1.
Applicable codes and standards do not require testing of air content of such grout.
There is, however, a a
requirement that the proportions of materials shall be based upon trial mixes using the same type and brand of cement, fine aggregate and admixtures as will be used for construction.
This requirement is complied with.
2.
The Project Specifications do not require a specific testing frequency for air content of this grout nor did the mix approval referenced in the inspection report, and in fact the mix approval did not require that the air content "not exceed 10 percent."
8107200567 810624 PDR ADOCK 05000498 PDR G
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June 4, 1981 ST-HL-AE-681 SFN:
C-0570 Page 2 The statement concerning the A-0-3-15 grout that,
" design air content of 10% should not be exceeded" was intended to assist the concrete supplier in adjusting the dosage rates of air entraining ad-mixture giving due consideration to such items as ambient conditions, sand fineness modulus and cenant content.
It was not intended to be a technical requirement for in-process control.
Based upon the -
Engineering and QC review of batch plant records and the results of periodic compressive strength tests, we have confirmed that the intent of the " Note" was complied with and that quality grout was being batched.
3.
The application of grout on the construction joint facilitates bonding and consolidation of the first layer of concrete placed on the joint, in addition to lubricating the slickline prior to pumping of concrete.
The design requirements for grout of this type are met by complying with Item 1 above and requiring strict control over the water / cement ratio and batching pro-cedures.
Such controls are adequately provided at STP.
In addition, grout of this type becomes intermixed when subsequent layers of concrete are placed resulting in essentially a homogeneous distribution, and since the grout mix is proportioned to have a water / cement (w/c) ratio similar to or lower than the concrete w/c ratio, uniformity and conservatism is maintained.
The reference to air content for grout mix No. A-0-3-15 has been clar.i fied on the current mix approval list to instruct the concrete supplier to batch admixtures at dosage rates similar to the concrete being batchel for that day.
In summary, Houston Lighting & Power is of the opinion that sufficient controls commensurate with the safety significance of this material, including-its use, do exist and have existed in the past.
These controls have assured that the material incorporated into the safety-related structures have the required quality.
I.
CORRECTIVE STEPS Based upon the above clarification, this is not required.
II.
CORRECTIVE STEPS WHICH WILL BE TAKEN TO AVOID FURTHER VIOLATIONS I
l None required.
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e Juns 4, 1981 ST-HL-AE-681 SFN:
C-0570 Page 3 III.
DATE WHEN FULL COMPLIANCE WILL BE ACHIEVED None required.
Very truly yours, u
(cy G. W. Oprea, Jr.
Executive Vice President HGO/amj Attachments l
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cc:
J. H.
oldberg June 4, 1981 Ilonmm I.ightinh& Pimer nimp.un ST-HL-AE-681
- 0. G. Barker SFN: C-0570 C. G. Robertson Page 4 Howard Pyle R. L. Waldrop H. R. Dean D. R. Beeth J. D. Parsons L. K. English J. W. Briskin R. A. Frazar STP RMS H. S. Phillips (NRC)
J. O. Read (Read-Poland,Inc.)
M. D. Schwarz (Baker & Botts)
R. Gordon Gooch (Baker S Botts)
J. R. Newman (Lowenstein,Newman,Reis,&Axelrad)
Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 I
l M. L. Borchelt Charles Bechhoefer, Esquire President Chairman, Atomic Safety & Licensing Boa-d Central Power & Light Company U. S. Nuclear Regulatory Connission P. O. Box 2121 Washington, D. C.
20555 Corpus Christi, Texas 78403 R. L. Range Dr. James C. Lanb, III Central Pnwer & !19ht 313 Woodhaven Road P. O. dox 2121 Chapel Hill, North Carolina 27514 Corpus Christi, Texas 78403 R. L. Hancock Mr. Ernest E. Hill Director of Electrical Utilities Lawrence Livermore Laboratory City of Austin University of California P. O. Box 1088 P. O. Box 808, L-123 Austin, Texas 78767 Livermore, California 194550 1
I T. H. Muehlenbeck Willian S. Jordan, III City of Austin Harmon & Weiss P. O. Box 1088 1725 I Street, N. W.
Austin, Texas 78767 Suite 506 Washington, D. C.
20006 J. B. Poston Robert Hager, Esquire Ar,istant General Manager of Operations Citizens Concerned About Nuclear Power City Public Se vice Board 5106 Casa Oro P. O. Box 1771 Stn Antonio, Texas 78233 San Antonio, Texas 78296 A. vonRosenberg Lann) Sinkin City Public Service Board 2207-D, Nueces P. O. Box 1771 Austin, Texas 78705 San Antonio, Texas 78296 Brian E. Berwick, Esquire Jay Gutierrez, Esquire Assistant Attorney for the State of Texas Hearing Attorney P. O. Box 12548 Office of the Executive Legal Director Capitol Station U. S. Nuclear Regulatory Commission Austin, Texas 78711 Washington, D. C.
20555
_6-3-$1_;
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UNITED. STATES ~OF AMERICA NUCLEAR REGULATORY COMMISSION l' ~
In the Matter S
S Houston Lighting.& Power S
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Docket Nos. 50-498l Company, et al.,
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sf50-499 i
South Texas Project S
Units 1 and 2 S.
r AFFIDAVIT J. H.
Goldberg being duly sworn, hereby deposes and says that he is a-.Vice President of Houston Lighting & Power Company; that he is duly authorized to cign and file with the Nuclear Regulatory Commission the attached response to the Notice of Violation identified in NRC Inspection Report 81-10; that he is familiar with the content thereof; and that the matters set forth therein are true and correct to the best of his knowledge and belief.
t
'J. H. GOLDBERG s/
VICE PRESIDENT - NUCLEAR ENGINEERING AND CONSTRUCTION STATE OF TEXAS S
S COUNTY OF HARRIS S
Subscribed and sworn to before ne, a Notary Public
/
in a'nd for Harris County, Texas this 4 '#v day of June
, 1981.
[
M Notary Public in and forghe State of Texas U
My Commission Expires:
d,_
50- f/
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