ML20116K841

Interim Deficiency Rept 85-02 Re ASME Section III Tanks & HX Welding.All Welds Not Per Drawings Will Be Mapped & Evaluated to Determine If Design Requirements Met.Next Rept Will Be Submitted by 850731

ML20116K841
Person / Time
Site:	Braidwood
Issue date:	04/22/1985
From:	Danni Smith COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
85-02, 85-2, 9998N, NUDOCS 8505030399
Download: ML20116K841 (2)

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blhf2 Commonwealth Edison O one Fast National Pin Chicago. Illinoi Address Reply to: Post Office Box 767 Chicago, Illinois 60690 April 22, 1985 Mr. James G. Keppler Regional Administrator U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Braidwood Station Units 1 and 2 10 CFR 50.55(e) No. 85-02 Interim Report Tank and Heat Exchanger Welding NRC Docket Nos. 50-456/457

Reference:

(a) D.H. Smith letter to J. G. Keppler dated February 21, 1985

Dear Mr. Keppler:

Reference (a) provided information concerning a potential deficiency reportable pursuant to 10 CFR 50.55 (e) regarding Deficient Welds on certain ASME Section III Tanks and Heat Exchangers at our Braidwood Station. The purpose of this letter is to provide an updated status of the corrective actions taken to resolve this issue. This letter is considered to be an Interim Report.

Status of Corrective Actions As previously stated, this issue was divided into two categories and each assigned a Commonwealth NCR to facilitate tracking and resolution these issues:

1) Chicago Bridge & Iron field erected tanks with weld deficiencies, such as undersized fillet welds, improper fit-up gap, unacceptable weld profile, improper weld configurations and missing welds. This condition is limited to tanks supplied / erected by CB&I under the jurisdiction of ASME Section III. (NCR 694)

2) Various vendor supplied safety related ASME Section III tanks and heat exchangers with weld deficiencies limited to undersized fillet welds on integral vessel supports and reinforcing fillet welds on vessel nozzles. (NCR 711)

To obtain the information necessary to disposition NCR 694, Chicago Bridge & Iron (CB&I) will inspect the tanks identified within the scope of the NCR. All welds not in accordance with drawing requirements will be mapped and then evaluated by CB&I to determine if design criteria requirements have been met. Other tanks supplied / erected by CB&I will be inspected on a sample basis to determine if similar weld deficiencies exist. This action is 3 currently in process, hnwRver. an estimate of completion has not , g been determined. 8505030399 850422 i PDR ADOCK 05000456 S pyg APR 2 51985 ~pp q

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Pittsburgh Testing Laboratory (PTL) is currently inspecting the tanks and heat exchangers identified within the scope of CECO NCR-711. All support and reinforcement fillet welds that do not satisfy the size, length, and configuration of the applicable drawings will be mapped. Those welds will be evaluated to determine if the design requirements have been met. Commonwealth Edison Company Project Field Engineering in conjunction with Sargent and Lundy will identify other vessels potentially involvec. PTL will perform a " spot" inspection on these vessels to the aforementioned attributes. An estimate of completion has not been determined at this time.

It is anticipated that an interim report will be submitted

'in July, 1985 updating the status of corrective actions being taken.

Please address any questions that you or your staff may have concerning this matter to this office.

er truly yours, 8%

David H. Smith Nuclear Licensing Administrator

/klj cc: NRC Resident Inspector - Braidwood Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 9998N