ML19322E585

Final Deficiency rept:safety-related Class 3 Butt Welds & Class 1,2 & 3 Attachment Welds Generically Contain Undersize Welds & Other Defects.Caused by Failure to Comply W/Asme Insp Program.Personnel Retrained

ML19322E585
Person / Time
Site:	Summer
Issue date:	03/21/1980
From:	Mary Johnson SOUTH CAROLINA ELECTRIC & GAS CO.
To:
References
NUDOCS 8003280461
Download: ML19322E585 (3)

Text

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.,u u.m u ... .c . March 21, 1980 United States Nuclear Regulatory. Commission Attn: Mr. James P. O'Reilly Director Region II 101 Marietta Street, NU Atlanta, Georgia 30303

Subject:

V. C. Summer Nuclear Station Unit #1 Reportable Item in Accordance with 10CFR50.55(e)

Centlemen:

On February 21, 1980, the Region II Resident Inspector (J. Skolds), was notified of a reportable item relative to Class 3 Butt Welds and Class 1, 2, and 3 Attachment Welds. Deficiencies were detected in these welds af ter they.had been accepted by the Constructor's ASME Code QC organization. This item has been assigned NRC number of 50-395/80-05-06.

Nature of Condition Some safety related Class 3 Butt Uelds and Class 1, 2, and 3 Attachment Welds are found to generically contain undersize welds and/or a variety of weld defects such as are strikes, porosity, undercut, etc. These conditions were identified af ter the welds had been accepted by the Constructor's ASME Code QC organization, making all such welds suspect.

Cause The cause of the conditions is the failure to perform and comply with procedures on the part of the Code craf t and QC organizations concluded to be a breakdoun in the AS !E inspection program. The Code QC program breakdown results from any of a combination of factors including so=c specific procedural inadequacies and some less specific interpretation, training, competency, attitudes, and supervision inadequacies.

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' mc. Jamts P. O'Railly Page 2 March 21, 1980 Safety Implications To determine exact safety implications, Engineering would need to evaluate each specific condition for cach veld. The extent of this effort is indeterminate since the extent and specifics of the conditions are unknown prior to reinspection. Since it is apparent that defactive conditions exist due to the QC breakdown, it is not possible to rule out the potential of some specific defect having safety implication. For this reason, the conditions are conservatively being classified as a potential significant deficiency which will Le corrected to remove any doubt as to product acceptability.

Actions to Correct Conditions SCEEG is in the process of implementing a controlled reinspection program to identify all deficient safety related Class 3 Butt Welds and Class 1, 2, and 3 Attachment Welds and have all deficient condi-tions repaired or evaluated by the Engineer. The reinspection will be performed by Constructor's Code QC personnel during the systems completion walkdown inspection for each system performed by the Constructor prior to system turnover. The SCE&G/QC organization will over-view the walkdown inspections. All welds rejected as a result of the walkdown inspections will be repaired, reinspected by the Constructor's QC organization for Code purposes and again inspected for acceptance _ _ _ _

by the SCE&G/QC organization. All other safety related ASME Code Class.

, 1 and 2 pipe welding has been processed under radiographic control and can be therefore excluded from this reinspection.

Corrective Actions to Prevent Recurrence Commensurate with corrective actions in the Code QC area in general, specific actions were taken relative to Butt and Attachment Welds.

SCE&G and the constructor have implemented a program of in-depth review of procedures in this area to provide adequate work instructions to welders and inspectors. Training of the craft and inspection personnel has taken place with SCE&G verification of adequacy. In addition, the SCE&G/QC organization will overview inspections performed in this area by the Constructor's ASME Code QC organization. The long term objectives of this corrective action is to re-establish confidence in the Constructor's QC organization.

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Mr. Jcm: P. O'Reilly Page 3 March 21, 1980 SCE&G believes the actions outlined above will adequately resolve deficiencies with ASME Class 3 Butt Welds and Class 1, 2, and 3 Attachment Welds. Since all necessary actions have been identified and are in the process of being implemented, we consider this a final report on this item. All actions taken regarding this item will be available at the Construction Site for NRC review. Should further information be required, please contact us.

Very truly yours,

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DRM/MCJ/jls cc: C. J. Fritz G. C. Meetze ,

Inspection & Enforcement Washington, DC l