ML17275A865

Interim Deficiency Rept,Originally Reported on 801222,re Thermite Welding on Buried Svc Water Piping.Cause Not Stated.Testing Being Developed to Assess Effect of Welding on Base Matl.Final Rept Will Be Submitted by 810501

ML17275A865
Person / Time
Site:	Columbia
Issue date:	01/22/1981
From:	Matlock R WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, GO2-81-14, NUDOCS 8103120399
Download: ML17275A865 (6)

Text

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ACCESSION NBR j8103120399 DOC ~ DATE! 81/01/22 NOTARIZED!'O, DOCKET FACIL'!50 397 WPPSS Nuclear ProJe'ctr Unf t 2r Wash'ington Public Powe>>

05000397 AUTH,NAME AUTHOR AF FILIATION MATLOCKrR,G~

Washfngton Public Power>> Supply System RECIP ~ NAMEl RECIPIENT AFFILIATION ENGELKENrR ~ HE Region 5r San FrancisCor Office', of the'ire'ctor>>

SUBJECT! Inter im deficiency r eptior )ginal ly reported on 801222'rr e thermit'e>> welding on burgled svc water, piping, Cause'ot stated, Testing, being, developed to assess effect" of welding on base matlTBF)nal rept" will be(=submitted by 810501, DISTRIBUTION CODE I BO>>9S COPIES RECEIVED I>>.TR J. ENCI.

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TITLE.': Construction Deficiency Repor t" (10CFR50i55E')

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Washington Public Power Supply System A JOINT OPERATING AGENCY P.O. BOX 968 3000 GEO. WASHINGTON WAY RICHLAND,WA5HINGTON 99352 PHONE (509I 372.5000 Docket No. 50-397 Nuclear Regulatory Commission Region V

Suite 202, Walnut Creek Plaza 1990 North California Boulevard Walnut Creek, California 94596 Attention:

Hr. R.

H. Engelken, Director January 22, 1981 G02-81-14 Gentlemen:

Subject:

WPPSS NUCLEAR PROJECT NO.

2 POTENTIALLY REPORTABLE DEFICIENCY 10CFR50.55(e)

THERHITE WELDING ON BURIED STANDBY SERVICE WATER SW PIPE Your staff was previously informed by telephone on December 22, 1980, of a "Potentially Reportable" 10CFR50.55(e) condition regarding the use of thermite welding to attach the cathodic protection pigtails to ASME piping. Attached, please find the WNP-2 Project's Interim Report which identifies the approach that's being taken to resolve this condition.

It is estimated that the final report on this condition will be submitted by Hay 1, 1981.

Please contact us if you have additional questions.

Very truly yours, RGH/RPS/im

Attachment:

as stated cc:

WS Chin - BPA ND Lewis - EFSEC, Olympia RE Snaith

-88R, NY V. Stello -

NRC R.

G. Hatlock Program Director, WNP-2 AD Toth -

NRC Site JJ Verderber - B8R, NY E.

Wood -

NUS Corporation WNP-2 Files 8>03 X9 II3+

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WASHINGTON PUBLIC POWER SUPPLY SYSTEM DOCKET NO. 50-397 - CPPR-93 INTERIM REPORT POTENTIALLY REPORTABLE CONDITION WPPSS NUCLEAR PROJECT NO.

2 THERMITE WELDING ON BURIED SERVICE WATER PIPING Statement of Problem:

Cathodic protection pigtails have been attached to the outside of buried Standby Service Water (SW) Piping, using the -thermite process which is not recognized by ASME III ND (Class

3) or ASME Section IX.

The effect of the thermite weld on the pipe material is unknown but could possibly cause a change in mechanical properties, create residual stresses and enbrittlement or cracking.

Pro osed A

roach to Resolution:

A test program is being developed.

Thermite welds will be made duplicating the procedure utilized by the contractor.

Destructive and metallurgical tests will be preformed to assess the effect of the welding on the base material.

The testing will consist of bend tests, tensile tests and metallurgical examination.

Impact tests were not considered, appropriate

'n as much as there were no impact test requirements imposed by ASME Code for this material.

The final report on this condition will be submitted by May 1, 1981, pending completion of the test program and evaluation of the test results.