ML20028B289

Interim Deficiency Rept 215 Re Skewed T-joint Welds. Initially Reported on 821022.Welds Lack Required Leg Length. Insp Sampling Plan Initiated for Large Bore Pipe Supports. Next Rept Expected by 830222

ML20028B289
Person / Time
Site:	Columbia
Issue date:	11/19/1982
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, GO2-82-937, NUDOCS 8211300251
Download: ML20028B289 (2)

Text

Docket No. 50-397

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50.55 (e) Report at-P.O. Box 968 Washington 3000 Public GeorgeWashingtonWay Power Richland, Supply Washington Systeg 99352' d lQ9 2-5000 Docket No. 50-397 /2 pg November 19, 1982 ' 'D/,0 G02-82-937 R. H. Engelken Regional Administrator U.S. Nuclear Regulatory Commission Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596

Subject:

NUCLEAR PROJECT NO. 2 10CFR50.55(e) POTENTIALLY REPORTABLE CONDITION #215 SKEWED T J0:NTS

Reference:

Telecon dated October 22, 1982, R.T. Johnson to John Elin In accordance with the provisions of 10CFR50.55(e), your office was informed by telephone of the above subject condition on October 22, 1982. Attachment A provides the Project's interim report on the subject condition. We will continue to provide your office with quarterly up-dates until such time as the item is resolved. The next report will be submitted on or before February 22, 1982.

If there are any questions concerning this matter, please contact Roger Johnson, Project QA Manager, WNP-2, (509) 377-2501, extension 2712.

?/12Tfd P. , . Matlock Program Director, WNP-2

Attachment:

Interim Report - Condition #215 cc: W.S. Chin, BPA - Site A. Forrest, Burns and Roe - HAPO N.D. Lewis, NRC J. Plunkett, NUS Corp.

R.E. Snaith, Burns and Roe - NY A. Toth, NRC Resident Inspector (917Q)

Document Control Desk, NRC WNP-2 Files (9178) r' 8211300251 821119 ~ ~~~ ~, -

gDRADOCK 05000397 PDR

.os, WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET NO. 50-397 LICENSE NO. CPPR-93 SKEWED T JOINT WELDS 10CFR50.55(e) CONDITION #215 INTERIM REPORT Description of Noncompliance When members are welded with a fillet weld at other than 900 to each other, the AWS D1.1 welding code, and Burns and Roe drawing H501, Rev. 0, specify an increased leg length over that specified on the hanger details. On the acute angle, the increased leg length is specified to account for less than full penetration at the base of the weld. On the obtuse side, it is specified to assure the effective throat that is required is present.

Bechtel installed skewed T-Joint welds have been determined to be lacking the addi-tional leg length as required.

Safety Implication Skewed T-Joints are used throughout the plant on safety class-1 supports. Lack of adequate weld size could result in failure of SC-I hangers which could have an adverse effect on the safety of operations of WNP-2.

Corrective Action An inspection sampling plan has been established to randomly select and verify weld size on 60 skewed welds made by Bechtel on large bore pipe supports. After compilation of the data, the results will be transmitted to the Architect Engineer for acceptability analysis. If there are instances of weld failure, a bigger sam-ple may be required to justify acceptance of past work. This reinspection sampling program will also be performed for small bore supports. The evaluation to be per-formed by the Architect Engineer on the original saiaple population should be com-pleted by mid December 1982.