ML20078N160

Interim Deficiency Repts DER 82-57,DER 82-64 & DER 83-32 Re Conditions & Circumstances Surrounding Design Processes Involved W/Dissimilar Metal Socket Welds

ML20078N160
Person / Time
Site:	Palo Verde
Issue date:	10/06/1983
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
ANPP-27963-BSK, DER-82-57, DER-82-64, DER-83-32, NUDOCS 8310250415
Download: ML20078N160 (2)

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po 5 o-x;:3 esai Arizona Public Service Company sq Po Box 21666 e PHOENIX, ARI2ONA 85036 ,I /,

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October 6, 19832,i ANPP-27963-BSK/RQT U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident, Reactor Projects and Engineering Programs Subject : Dissimilar Socket Welds File: 83-019-026, D.4.33.2

Dear Sir:

Mr. Narbut, of your office, requested that we investigate why the dissimilar socket welds documented in DER 83-32, were not discovered when determining the extent of applicability of a similar problem.

The conditions and circumstances surrounding the design processes involved with dissimilar metal socket welds as documented by DER's 82-57, 82-64 and 83-32 are evaluated and summarized below.

DER 82-57: The investigation and correceive action of this condition was performed using the valve data sheets covering all the control valves purchased. This review would not have found the problem identified by DER 83-32 because the Kerotest valves were not motor-operated control valves purchased via a data sheet.

DER 82-64: The investigation and corrective action of this condition was performed utilizing the isometric drawings since the isometric drawings are intended to clearly show the material class breaks within a system and the associated type weld which was identified as a potential problem for ASME III piping. This review did not find the problem identified by 83-32 because the class break required for the Kerotest valves was inadvertently not shown on the isometric drawings.

8310250415 831006 PDR ADOCK 05000528 S pyg iO

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'Mr.LT'. W Bishop ANPP-27963

'Page 2 DEt ' 83-32: The investigation and corrective action performed for this DER was limited to. the identified Kerotest ' valves, since_. Bechtel Project Engineering' had determined that the condition was an isolated case. This determination is based on reviews previousJy performed to assure that the Purchase Order Specifications, Piping Material Classifications, Master Valve List, Isometric Drawings, and P&ID's'are completely consistent. This is backed up by the N-5 Code Data Package reviews which specifically

' require the valve manufacturer's code data material list be reviewed for

. compatibility with the material classification of the interfacing piping system.

Very truly yours, (

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E. E. Van Brunt , Jr.

m - p APS Vice President,.

Nuclear Projects Management ANPP Project Director EEVB/RQT:sn

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Richard DeYoung, Director W. J. Stubblefield Office of Inspection and Enforcement W.' G.' Bingham U. S. Nuclear Regulatory. Commission R. L; Patterson Washingtun,.D. C. 20555 R. W. Nelcher R. M. Grant

' T. G. Woods, Jr. D. R. Hawkinson

.G. C. Andognini L. E. Vorderbrueggen J. A.'Roedel G. A. Fiorelli D.'B. Fasnacht S. R. Frost A. C. Rogers J. Self B. S. Kaplan D. Canady

[ W. E..Ide Records Center J. Vorees Institute of Nuclear Power Operations J. R. Bynum 1100 Circle 75 Parkway - Suite 1500 D. D. Green /P. P. Klute Atlanta, Georgia 30339

'A. C. Gehr l

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