ML20062E074

Responds to 770523 NRC Ltr Re Violation Noted in Inspec Rept 50-498/77-06.Corrective Actions:Plan to Use Level I QC Inspectors for Quantitative Inspec & Inspectors Will Receive Training & Written Examinations

ML20062E074
Person / Time
Site:	South Texas
Issue date:	09/29/1978
From:	Frazar R HOUSTON LIGHTING & POWER CO.
To:	Hubacek W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20062E072	List: IR 05000498/1977006 ML20062E074
References
781116, NUDOCS 7812040127
Download: ML20062E074 (2)

Text

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tiOliSi.On Jl# 3e# Lighting 1M

& Power Scy: ember 29, 1978 r

P COmDanV a J Sr-!!L-AE-292 ifN,. . 1 f ledric Tcr.'.cr SFN- C-0510 II@ !_dh '-.'  !!O Box f/00 h fli! . ' Gt . Iloustoa. Teus 77001 Mr. W. G. Ilubacek U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Pla za Drive, Suite 1000 Arlington, TX 76012 RE: RESPONSE TO NKC INSPECTION FINDINGS SOUTil TEXAS PROJECT, UNITS 1 f, 2

. DOCKET NO. S0-498/77-06, ST-HL-AE-201,

? DATED FL\Y 23, 1977 j

SUBJECT:

UTILIZATION OF LEVEL I QC INSPECTORS FOR CONCRETE PREPLACEMENT AND PLACEMENT INSPECTION SOUTli TEXAS PROJECT ELECTRIC GENERATING STATION

Dear Mr. Ilubacek:

The purpose of this letter is to inform you of our plans relative to utilization of Level I QC Inspectors for concrete preplacement and placement inspection activities.

l We have re-evaluated our position as stated in our response to your audit of April 26-29, 1977 (Docket No. 50-498/77-06). In October,19/7, we made an inquiry to the Joint ACI-ASME Committee on Concrete Pressure Components for Nuclear Service (SC-3C) for clarification of the Code intent. A copy of our inquiry is attached.

To date, we have not received clarification from this committee.

(

lie plan to begin using Level I QC Inspectors for quantitative inspections in accordance with the team concept as referenced in Appendix VII - 4100 of ACI 359 - ASME Section III, Division 2,

" Proposed Standard Code for Concrete Reactor Vessels and Containments."

These inspectors will receive training including written exaninations.

Level I QC Inspectors who have cet the qualification requirenents set forth in Appendix VII - 3311 and passed the examinations will perforn inspections and tests per Table VII-4100-1. Level II QC Inspectors will continue to evaluate inspection and test results.

It is our intention to develop this progran as soon as possible, and to begin utilizing these Level I Inspectors as soon as they complete t raining.

'i81'20 401M

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l H re,'m i:j.t.nj & Poaer Compar:v Mr. W. G.lllubacek: -i l

Page 2 i Septeaber 29, 1978 Level I- QC Inspectors will work under the direction of a certi-fied Level II QC Inspector, with no more than three Level I Inspectors-assigned to each Level II Inspector. The following are exampics of quantitative inspections to be performed by Level I QC Inspectors:

Reinforcing Steel Inspection - checking for correct number, site, and spacing of bars; checking lap length, development length and concrete cover; and checking security of bars and projection of dowels.

, Embed Inspection - checking for correct number, type, and

{ location of embeds; checking for bent studs, clearance between embeds and rebar, and security of embeds; and '

4 checking type, location, and security of waterstop, i

i Formwork Inspection - checking for cicanliness, mortar

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tightness, structural support, dimensions, and location j 1

{} of forms; checking type and spacing of form ties; checking for proper application of form release agents; and checking ,

j t location and size of chamfer strips.

i Construction Joint Inspections - checking preparation, sur-face moisture condition, location, and cleanliness of 1 i concrete construction joints.

Tendon Sheathing Inspection - checking joint preparation and physical and weather protection.

Concrete Placing - checking setup of hoppers and tremies, placing of screeds, backup placement equipment, weather pro-4 tection provisions, mix design, rate of placement, vertical

• drop and lift thickness; and checking the temperature of embedded items and forms.

( We trust that you will find this. position satisfactory. 'Should you require any further clarification or information, please advise.

Very truly yours,

^-

,/Q2%

R. A. Fr ar, Manager Quality As3 trance Depar.tment RAF: j w Attachment cc: Messrs. E. A. Turner H. L. Key

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