ML19260C548

Interim Rept of Const Deficiency 15:on 791126,procedural & Performance Deficiencies Identified in Ultrasonis Testing of Structural Welds.Ebasco Engineering Studying Methods to Ensure That Affected Welds Meet Design Requirements

ML19260C548
Person / Time
Site:	Waterford
Issue date:	01/02/1980
From:	Hart J, Hymes R, Padalina J LOUISIANA POWER & LIGHT CO.
To:
Shared Package
ML19260C547	List: ML19260C545 ML19260C548
References
NUDOCS 8001070402
Download: ML19260C548 (3)

Text

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. LOUISIANA POWER AND LIGHT COMPANY WATERFORD SES UNIT No 3 ,.

- INTERIM REPORT OF SIGNIFICANT DEFICIENCY No. 15 PROCEDURAL AND PERFORMANCE DEFICIENCIES IN ULTRASONIC TESTING OF STRUCTURAL WELDS PERFORMED BY INDUSTRIAL ENGINEERING WORKS Reviewed By -b1b J PadT11no - Project Engineer I j Reviewed By J art - Project Licensing Engineer Reviewed By E Kowalski - Asst. Chief Civil Engineer Reviewed By -

R Hyme/ - Project QA Engineer 1696 208 8001070 901

INTERIlt REPORT d .

SIGNIFICANT DEFICIENCY REPORT NO. 15

- . PROCEDURAL AND PERFORMANCE DEFICIENCIES IN ULTRASONIC TESTING OF STRUCTURAL WEII)S PERF0PJED BY INDUSTRIAL ENGINEERING WORRS INTRODUCTION This report is subnitted pursuant to 10CFR50.55(e). It describes pro-cedural and performance deficien.ies in ultrasonic testing of structural welds by Industrial Engineering 'Torks (IEW) for Louisiana Power & Light Company's Waterford Steam Electric Station Unit No. 3. This problem was identified on November 26, 1979.

DESCRIPTION The extent of the. deficiency is as follows: All required UT examination perfor=ed on NY P0s 403573, 403593, 403611 have either Performance Deficiency I-l or Performance Deficiency I-2 (see below). In addition, particular examination =ay have Procedure 'eficiencies II-l or II-2.(see below).

I Performance Deficiencies

l. Insufficient coverage (one side only)

-Requirement ASFE V reference by ASFE III, NF-5000.

-(affects P0s 403573 and 403611) --

2. a) Insufficient examination sensitivity b) Equipment not meeting performance requirements c) Incorrect range-and lo:ation-calibration

- Requirc=cnt AWS Dl.1

- (affects only PO 403593)

II Procedural Deficiencies

1. Incorrect Procedure requirements in shop drawings

-(affects Pos .403573 and 403611)

2. Incorrect requirements for detecting and evaluating fusion line indications

-(affects Pos 403593 and.403611)

SAFETY IMPLICATION }hb 2 Ultrasonic Testing is required on certain full penetration welds to ensure the velds meet the quality standards of AS}E Section III Subsection SF or AWS Dl.1 as appropriate. IEU's UT procedures do not fully meet th: examination require-ments of the above codes. The welds in question are on Reactor Coolant Pump supports, Reactor Coolant system pipe stops, pipe whip restraints, Pressuricer support, Safety Injection Tank supports and sore other steel structures inside containment. If corrective action is not taken defects in the wcld on chece safety-related structures could exist that would have been detected by proper implementation of cede UT techniques but not by the techniques actually a; plied.

Such wcld defects could under certain conditions lead to higher than allowah:e stress levels on these structures. If left uncorrected, these defects, if they

,=,. .

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exist could result in failure of the weld and consequent failure of the affceted safety-related component when subject to the dynamic events postu-

, , lated as bases for design. .

CORRECTIVE ACTION e?

Steps have been taken by Ebasco Quality Assurance to preclude construction progress f rom adversely affecting corrective action.

At the same time Ebasco Engineering, in conjunction with Industrial Engineering Vorks, is studying cethods to ensure that aff ected welds meet design require-ments. It is standard industry practice to specify full penetration welds on an entire item or weld when analysis shows it to be required on only part of that item or veld. This approach is taken to promote efficiency in shop operations and to ensure that full penetration welds are located in all required aress. This evaluation effort will therefore include a determination by Ebasco Engineering of those areas where full penetration welds are actually required.

Where this is the ense appropriate steps will be taken to assure that each weld meets or exceeds the quality scandard required by design and engineering consid-erations.

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9 9 1696 210

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