ML20042A196

Final Part 21 Rept Re Pipe & Component Support Sleeves Mfg & Installed by Stewart Mechanical Enterprises,Initially Reported 801208.Piping Routed Through Support Sleeves Reclassified as nonsafety-related Will Be Redesigned

ML20042A196
Person / Time
Site:	Marble Hill
Issue date:	03/12/1982
From:	Shield S, Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-82-575-000 10CFR-50.55E, 580-36, PT21-82-575, PT21-82-575-000, S80-36, NUDOCS 8203230194
Download: ML20042A196 (2)

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PUBLIC SERVICE q $bN's INDIANA March 12, 1982 7 F;d ~ 77 9 9 -g i S80-36 V ej F 2 21982> }

S. W. Shields I- Senior Via President -

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Mr. James C. Keppler, Docket Nos.: STN 5 46]

Regional Administrator STN 50-54 U. S. Nuclear Regulatory Commission Construction Permit Nos.:

Region III CPPR - 170

799 Roosevelt Road CPPR -'171 Glen Ellyn, Illinois 60137 i

Marble Hill Nuclear Generating Station - Units 1 and 2

Dear Mr. Keppler:

On December 8,1980, Mr. T. D. Geib of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable

' item as required by 10 CFR 50.55(e). During receipt inspection, PSI.

Quality Assurance personnel were unable to verify, using construction records,'that certain pipe sleeves had been installed in their designated locations. This~ concern pertained to'a group of safety and non-safety l related piping subassembly and partial component support sleeves l fabricated and installed by Stewart Mechanical Enterprises (SME) i as a subcontractor to Gust K. Newberg Construction, Inc.

i Subsequent investigation of this matter determined that SME had installed 128 safety related sleeves prior to shutdown of safety related construction.

Material traceability was maintained throughout the fabrication process,.

however, SME did not record-or document when and where cach sleeve was installed. Instead, SME maintained traceability by physically stamping an identification number on each sleeve. Physical inspection .

of the installed sleeves however, revealed that identification numbers

( were not always located such that they would be visible after installation.

Of the 128 sleeves installed by SME, traceability of 120 was established l through records review or physical inspection. A review of the. design i drawings indicated that the safety related pipe lines originally routed

, through three sleeves had been either deleted or rerouted. These

component support sleeves have been reclassified as non-safety related i and will not be used to support safety relat ed piping. Identifying

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P. O. Box 190, New Washington, Indiana 47162 812. 289 .1000 gg 15 198b

e PUBUC SERVICE IPMMANA James G. Keppler March 12, 1982 SF'-36 markings were inaccessible on another three sleeves and traceability could not be established. These component support sleeves have been reclassified to non-safety related and the piping routed through them will be redesigned so that they no longer derive their support from the reclassified sleeves. Two sleeves were discovered to be incorrectly fabricated and were also reclassified as non-safety related.

The piping routed through these sleeves will also be redesigned such that support is derived from sources other than the reclassified component support sleeves.

Ilad this problem remained uncorrected the reclassified sleeves may not have been able to support the associated piping when subjected to the most severe design basis loadings.

Installation of safety related sleeves has since been removed from the SME scope of work and will be performed henceforth by Cherne Contracting Corporation. Cherne installation procedures contain adequate measures to maintain sleeve traceability.

This letter is intended to fulfill the requirements of a final report-as defined in 10 CFR 50.55(e). If you have any questions on this matter, please feel free to contact me.

Since ely, ,

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S. W. Shields TDG/bak cc: Director of Inspection and Enfo cement U. S. Nuclear Regulatory Commfi. ion Washington, D. C. 20555 J. E. Konklin J. J. liarrison