ML20063M925

Final Deficiency Rept DR-45 Re Failure to Meet Spec Requirements for Limited Access Welding.Initially Reported on 820404.Welds Repaired to Original Requirements.Training Conducted for Insp Personnel & Const Site Investigated

ML20063M925
Person / Time
Site:	River Bend
Issue date:	09/07/1982
From:	Booker J GULF STATES UTILITIES CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, DR-45, RGB-13-339, NUDOCS 8209160385
Download: ML20063M925 (2)

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[ ;' 9 "iV F iLi9 September 7, 1982 RBG-13,339 File Nos. G9.5, G9.25.1.1 Mr. John T. Collins, Regional Administrator U. S. Nuclear Regulatory Commission Region IV, Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011

Dear Mr. Collins:

River Bend Station Unit 1 Docket No. 50-458 Final Report /DR-45 On April 4, 1982, Gulf States Utilities (GSU) informed the Nuclear Regulatory Commission's (NRC) Region IV Office of a potentially reportable deficiency concerning a failure to meet specification requirements for limited access welding (DR-45). On August 27, 1982, GSU determined that the deficiency met the reporting requirements of 10CFR50.55(e) and notified the NRC's Region IV Office. GSU has completed its investigation of the reportable deficiency. Attached is the thirty (30) day written report as required by 10CFR50.55(e)(3).

This concludes GSU's response on this subject.

Sincerely, J. E. Booker Manager-Engineering & Licensing River Bend Nuclear Group JEB [/kt cc: Director of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 R. L. Brown (RRI)

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ATTACHMENT September 7, 1982 RBG- 13,339 DR-45/ Failure to Meet Specification Requirements for Limited Access Welding Description of the Defiency This deficiency concerns a failure to meet the River Bend Station (RBS) program requirements for manual limited access welding.

After welding was conducted in the fuel building on the spent fuel pool cleaning system and the welds had been inspected and accepted by Field Quality Control (FQC), it was discovered that the welder had performed 12 ASME III, Class 3 stainless steel welds without being qualified for limited access welding in accordance with paragraph 6.2.1 of ASME III Welding Procedure W-3, Revision 2, and Project Specification No. 228.160.

The GSU RBS program requirements for this limited access welding include either qualifying the welder under simulated conditions or performing radiographic examination of the welds. In order to establish the condition of these 12 welds, radiographic examinations were performed. The results indicated that seven welds required rework and five welds required removal and replacement.

Safety Significance It is assumed that, had the condition of these 12 welds gone uncorrected, failure of one or more welds may have occurred. The effect of weld failure in the spent fuel pool cooling system on the safe operation of the plant is dependent on the failure pattern. The spent fuel pool cooling system has redundant cooling loops; therefore, failure of any one weld at any position would not adversely affect the safe operation of the plant. Concurrent failure of more than one weld could, however, result in the potential loss of both cooling loops which would adversely impact the safe operation of the plant.

Corrective Action All 12 weldc have been repaired to the original requirements. The welders involved were subsequently qualified by retest in the weld test facility and their welder identification cards currently reflect those special qualifications.

Training sessions were conducted for FQC inspection personnel on the requirements for restricted accessibility welding. Also, the Inspector's Handbooks were revised to include restricted access inspection attributes for fit-up and final inspections.

An investigation was conducted by Construction and verified by FQC l to identify any other areas of the construction site that may contain similar restricted access welds. There were no additional l welds identified.