ML20040H422

Interim Deficiency Rept DER-81-56 Re Richmond Engineering Letdown Heat Exchangers That Had Stiffener Rings Welded 1/3 Instead of 1/2 Diameter as Required by ASME Code,Initially Reported 820105.Final Evaluation Expected by 820406

ML20040H422
Person / Time
Site:	Palo Verde
Issue date:	02/03/1982
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Faulkenberry B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-20079-GHD, DER-81-56, NUDOCS 8202180237
Download: ML20040H422 (3)

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• PHOENIX, ARIZON A 85036 l February 3, 1982 ANPP-20079-CHD/BSK g

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U. S. Nuclear Regulatory Commission i A Region V (*. - # D 1450 Maria Lane, Suite 210 2 -52 Walnut Creek, California 94596-5368 g Attention: Mr. B. H. Faulkenberry, Chief O Reactor Construction and Engineering Support Branch

Subject:

Interim Report - DERS 81-56 A 50.55(e) Potentially Reportable Deficiency Relating to Unit 1 Letdown Heat Exchangers by C. E. Subcontractor Richmond Engineering Had Stiffener Rings Welded 1/3 of Diameter Instead of 172 Dlameter Regtiired_,by ASME Co g

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File: 82-019-026 1 D.4.33.2 0 ,

Reference:

Telephone Conversation between Bob Dodds and Q ff

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{p George Duckworth on January 5, 1982 (DER 81-56) O Kypw

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Dear Sir:

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The NRC was notified of a potentially reportable deficiency in t referenced telephone conversation. At that time, it was estimated that a determination of reportability would be made within thirty (30) days.

Due to the extensive investigation and evaluation required, an Interim Report is attached. It is now expected that this informa-tion will be finalized by April 6, 1982, at which time a complete report will be submitted.

Very truly ours

. CM IV.

i E. E. Van Brunt, Jr.

APS Vice President Nuclear Projects ANPP Project Director EEVB/GHD:jom Enclosure cc: see attachment b) i 8202180237 820203 PDR ADOCK 05000528 //

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U. S. Nuclcrr Rrgul tory Commiezion Attention: Mr. B. H. Faulkenberry, Chief February 3, 1982 ANPP-20079-CHD/BSK Page 2 cc: Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 J. A. Roedel D. B. Fasnacht G. C. Andognini F. W. Hartley J. M. Allen A. C. Rogers B. S. Kaplan W. E. Ide J. Vorees J. A. Brand A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher R. M. Grant D. R. Hawkinson L. E. Vorderbrueggen R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 Ms. Patricia Lee Hourihan 6413 South 26th Street Phoenix, Arizona 85040 l

INTERLH REPORT - DER 81-56 POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNIT 1 I. POTENTIAL PROBLEM During a Combustion Engineering (CE) Quality Assurance audit of Richmond Engineering Co. (RECO), two letdown heat exchangers were found in violation of Paragraph NC-4437 2(b) of the ASME Boiler and Pressure Vessel Code which requires that stiffening rings be welded to the shell "...not less than one-half the outside cir-cumference..." The RECO drawing called for a 2" @ 4" fillet weld, meaning 2" of weld on 4" centers. Evidently the welder mistook this to mean 2" of weld with 4" spaces. The particular nonconforming units were corrected prior to leaving RECO's shop.

A subsequent field inspection of the letdown heat exchangers al-ready shipped discovered the same condition on the Palo Verde Unit 1 equipment.

II. APPROACH TO AND STATUS OF PROPOSED RESOLUTION Bechtel has requested assistance from Combustion Engineering in evaluating and dispositioning this condition.

III. PROJECTED COMPLETION OF CORRECTIVE ACTION AND SUBMITTAL OF THE FINAL REPORT Evaluation of this condition and submittal of the Final Report is forecast to be completed by April 6, 1982.