ML19242C405
| ML19242C405 | |
| Person / Time | |
|---|---|
| Site: | Marble Hill |
| Issue date: | 06/27/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA |
| References | |
| NUDOCS 7908100365 | |
| Download: ML19242C405 (2) | |
Text
PDR pm af cg UNITED STATES
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NUCLEAR RdGULATORY COMMISSION y( '
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J.:ne 27,1979 Docket Nos. 50-546 50-547 Public Service of Indiana Attention:
Mr. S. W. Shields Vice President Electric System 1000 E. Main Street Plainfield, IN 46168
, eat? amen:
This refers to the discussion between you and I and others of our respective staffs on June 26, 1979, regarding the quality of concretc construction activities at the Marble Hill Units 1 and 2 plant site.
We understand based on these discussions that Public Service of Indiana will:
1.
With its contracted organizations, continue surface and volumetric examination of existing concrete to establish it's adequacy and randcaly select and test a statistical sa=ple, representative or both congested and other concrete volumes to casure with 95% reliability and 95% confidence level, that concrete quality meets requirements. This aumination program shall be expeditiously it,,le=ented and completed.
Evaluate anv take appropriate corrective actions of all identified deficiencisa and assess them in terms of tneir impact on safety related concrete construction activities.
2.
Identify and evaluate concrete repair areas for adequacy.
This effort is to include no less than those areas refer uceu by existing QA/QC documentation for repaired areas and those identified by 100% visual / mechanical examination of existing concrete stractures.
3.
Limit future concrete placement to non-safety related structures to permit the NRC to review and evaluate QA program improvements in-ituted on or about May 16, 1979 by PSI as a result of previously identified concrete deficiencies. During the existence et this concrete piacement limitation, QA/QC controls for non-safety related concrete activities will be the same as would be used for safety related structures.
IMDEDlf,TE / ~T! ON LETTER b
I 7908100 b
.# 4.
N7t resure concrete placement fer safety related structures until the NRC is satisfied by conp u hensive demonstration that your upgraded QA/QC program and process controls are adequate.
5.
Follo. ting resumption of concrete placenent for safety related structures, provide complete (100%) " overview" of all safety related concrete activities at the site. This " overview" is to continue until adequate confidence is established to the satisfaction of PSI and h1C.
Evidence of PSI's overview of the involved contractor's quality related activities is to be c.ocumented.
6.
Stop all safety related cor. crete activities until the cause and consequent conditions are fully rectified if significant deficiencies are identi Sed during the course of completing the above actica. hec is to be immediately informed of suin occurrences.
Please inform us if your understanding of this progrcm is different frem that stated.
Sincerely,
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G.Kop$br Director cc:
R. M. Brown Construction Project Superintendent Central Files Reproduction Unit NRC 20b PDR Local FJR NSIC TIC LeBoeuf, Lamb, Leiby & MacRae IIO WD l,A,T~C r
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