ML19350B510

Second Interim Deficiency Rept Re Average Ultimate Tensile Loads of 1-inch kwik-bolt Concrete Expansion Anchors.Design Change Notice Revised,Reducing Load Capacity & Confirmation Program Being Conducted.Next Rept to Be Submitted by 810716

ML19350B510
Person / Time
Site:	South Texas
Issue date:	03/13/1981
From:	Oprea G HOUSTON LIGHTING & POWER CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-636, NUDOCS 8103200691
Download: ML19350B510 (3)

Text

l The Light l Company H=sm ughsper m BMW Hasm. Tens mMUdS.7m March 13, 1981 ST-HL-AE-636 SFN: V-0530 Mr. Karl Seyfrit Director, RCI, 0IE Director, Region IV Director, AE00 Nuclear Regulatory Commission Chief, CE3, MPA 611 Ryan Pla:a Drive, Suite 1000 pEFILEe , s Arlington, Texas 76012 -

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Dear Mr. Seyfrit:

/7 South Texas Project u,, Ng [ '--.)

Docket Nos. S - , STN 50-499 Second Interim Report Concerning h  %

k 1 Inch HILTI Kwik - Bolt  %

Excansion Anchors * ',,t On December 12, 1980, Houston Lighting & Power Company, in accordance witn 10CFR50.55(e), notified your office of an item concerning a 10CFR Part 21 notification by HILTI Inc., on the average ultimate tensile loads of their 1 inch concrete expansion anchors. The HILTI notification to Houston Lighting & Power Company, dated November 25, 1981, recuired a reduction in the average ultimate tensile load capacity values for the 1 inch anchors.

The following is a summary of the actions taken to date by Houston Lignting & Power Company regarding this item:

(1) A Design Change Notice (DCN) has been incorporated into the Tecnnical Reference Cocument (TRD), " Design, Installation, Testing and Inspection of Concrete Excansion Anchor Bolts".

This DCN revised the average ultimate tensile load capacity values for the 1 inch anchors to conform to infomation supplied by HILTI Inc. g (2) In accordance with Houston Lignting & Power Ccmpany's responses 3 to NRC IE Sulletin 79-02, Revisions 1 and 2, an on-site testing program is ceing conducted to confirm the average ultimate tensile load capacity values for the 1 inch anchors. The infomation / /

provided as a result of the testing program will be evaluated to detemine confomance with the HILTI average ultimate tensile load capacity values.

810 32 0 Old/ g

. Hous' ton Lighting & Power Company March 13,1981 ST-HL-AE-636 SFN: V-0530 Page 2 i

(3) Based upon the infomation provided througn the on-site testing program the designs wnich utili::e the subject concrete expansion anchors will be reviewed for acceptability.

4 (4) The " hold" previously placed on the installation of the subject concrete expansion anchors remains in effect.

The next report concerning this item will be submitted by July 16, 1981.

If there are any questions, please contact Mr. Michael E. Powell at (713) 676-8592.

Very truly yours ,

./,

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f d F pre &f /r Ex utive.PA sident RRH/ par

Hou'ston Lighting & Power Company March 13,1981 cc: ST-HL-AE-636 J. H. Goleter0 SFN: V-0530 C. G. Barker Poward Pyle Page 2 R. L. Waldrec '

H. R. Cean D. R. Beeth J. C. Parsons

• L. K. English

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J. W. Briskin R. A. Fra:ar STP RMS H. S. Phillips (NPC )

J. O. Read (Read-Poland, Inc.)

M. D. Schwar: (Baker & Botts)

R. Gordon Gooch (Baker & Botts)

J. R. Newran (Lowenstein, Ne wan, Reis, & Axelrad)

Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 M. L. Borchelt Charles Bechhoefer, Escuire President Chairman, Atortic Safety & Licensing Board Central Power & Light Company U. 5. Fuclear Regulatory Commission P. O. Box 2121 Washington, D. C. 20555 Corpus Christi, Texas 72403 R. L. Range Dr. James C. Lanb, III Central Power t Light 313 Woodhaven Road P. O. Box 2121. Chapel Hill, North Carolina 27514 Corpus Christi, Texas 78403 R. L. Hancock Dr. Erreth A. Luebke Director of Electrical Utilities Atomic Safety & Licensing Board City of Austin U. S. Nuclear Regulatory Commission P.'0. Box 1088 Washington, D. C. 20555 Austin, Texas- 78767 T. H. Muehlenbeck Citizens for Ecuitable Utilities, Inc.

City of Austin c/o Ms. Peggy Puenorn P. O. Box 1088 Doute 1, Box 1664 Austin, Texas 78767 Brazoria, Texas 77422 J. B. Poston Pat Coy Assistant General Manager of Operaticns City Public Service Boarc Citizens Concerned About Nuclear Power 5106 Casa Oro P. O. Box 1771 San Antonio, Texas ~

78233 San Antonio, Texas 78296 A. venRosencerg Betty Wheeler, Escuire City ?ublic Service Boarc 3

P. C. Box 1771 San Antonio, Texas 78296 Foffman,Steec&

1008 5. Madison Wheeler),

Acarillo, Texas 79101 1

l gl Brian E. Berwick, Escuire Bernard M. Bordenick, Escuire Assistant Attorney for the State of 7exas Hearing Attorney P. O. Box 12548 Office of the Executive Legal Director

~ Caci:cl Station- U. S. Nuclear- -Regulatory Cemission

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