ML19309G793

Final Rept of Significant Const Deficiency 14 Re Unsatisfactory Impact Tests on Pipe Penetration Assemblies. QC Training Program Provides More Emphasis on Preparation of Qc/Qa Records.Penetration Assemblies Were Returned

ML19309G793
Person / Time
Site:	Waterford
Issue date:	04/18/1980
From:	Crnich J, Hart J, Milhiser R LOUISIANA POWER & LIGHT CO.
To:
Shared Package
ML19309G788	List: ML19309G787 ML19309G793
References
NUDOCS 8005070580
Download: ML19309G793 (3)

Text

800507o 5

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O LOUISIANA POWER & LIGHT COMPAr.T WATERFORD SES UNIT No 3 Final Report of 4 Significant Construction Deficiency No 14 Unsatisfactory Icipact Tests On Pipe Penetration Assemblies 3 & 4 l

Reviewed by

• l dat- )/ 0 Crnich - Site Manager / ,

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Reviewed by 4 MN' R J'MITI(iser - Project Superintendent Reviewed by // ejt NO-86 J Nar't 1 Project' Licenspfig Engineer Revieued by o (h

R A Hartnett - Q A Site Supervisor

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April IS,1980 t

FINAL REPORT SIGNIFICANT CONSTRUCTION DEFICIENCY NO 14 UNSATISFACTORY IMPACT TESTS ON PIPE PENETRATION ASSE>BLIES ~1 & 4 Summary Pursuant to the requirements of 10CFR50.55(e), this report identifies a nonconformance of impact properties for the process pipe of Containment Penetration Assemblies 3 and 4 supplied to Ebasco at the Waterford SES Unit No 3 Project by Associated Piping and Engineering Company - Temp Flex Division (Compton, California) .

Description Associated Piping and Engineering Corporation - Temp Flex Division, under purchase order contract (NY-403422) to Ebasco Services Incorporated, sup-plied ASME Class 2 process pipe of containment penetration assemblies 3 and 4 to the Waterford SES - Unit No 3 Project which are to be used for the feedwater system. It was determined by the Ebasco Quality Assurance Department that impact test results for this heat (#LO2364) did not meet the acceptance criteria of ASME,Section III, Subsection NE, 1971 Edition, Winter 1973 Addenda for the application. Specifically the Code required that this material have a lateral expansion of 25 mils for Charpy V-notch impact testing. Actual Cyresults were 18, 19, and 21 mils lateral expan-sion for the process pipe of containment penetrations 3 and 4. This de-viation was detected prior to installation of these assemblies.

For further verification of this data two C tests y were performed on re-presentative heats. It was determined that similar unacceptable values were obtained.

As required by Associated Piping QA Manual and Ebasco procedure (VQAD-13) initial QA review of the test results by vendor and Ebasco failed to de-tect the deviation of confornance to the Code requirement. Subsequent to this discovery Ebasco initiated NCR No W3-1695 describing this deficiency on October 4,1979.

It was confirmed by Associated Piping and Engineering Corporation - Temp Flex Division that safety related components fabricated f rom this heat for the Waterford SES Unit No 3 Project were limited to the two process pipes for penetration assemblies described herein. Further verification was ob-tained from Associated Piping and Engineering Corporation - Temp Flex Di-vision to assure that no other safety related components for other nuclear projects were supplied from this heat number.

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Safety Implication The Charpy Test is performed to demonstrate the ability of the piping to equalize the design stresses as set forth in Sub-section 3.9.3 of the Final Safety Analysis Report. The results of the impact testing on pro-cess pipe of penetration assemblies 3 and 4 indicate that fatigue could occur when the piping is subjected to typical dynamic events which may oc-cur in the plant. If left uncorrected, this deficiency could lead to pipe crack during cold hydrostatic tests or later during emergency feedwater operation due to corrosion / thermal stress.

Corrective Action Representing a discrepancy in initial review of QA documents and a devi-ation from design criteria (Code Requirements) two modes of corrective action were taken:

1) A facility resurvey of Associated Piping and Engineering Corporation -

Temp Flex Division was performed by Ebasco Quality Assurance with spe-cial emphasis on the training program and mechanics of the QA records review process.

Corrective actions were provided by means of increasing the scope of the QC personnel indoctrination and training program to provide more emphasis on the review of preparation of QC/QA records.

2) To correct the document review discrepancies by the Ebasco Vendor Qua-lity Assurance Representative (VQAR), a corrective action directive has been issued to all VQAR supervisors. Corrective action was in the form of re-indoctrination of all VQAR(s) by their supervisors relative to the review of QA records.

To correct the material deficiencies of the process pipe, the pene-tration assemblies were returned to Associated Piping and Engineering Corporation - Temp Flex Division for rework. Both process pipe sec-tions were removed from the assemblies and heat treated to improve the impact properties in accordance with a qualified heat treatment process.

Verification testing (Charpy "V" Notch Impact Test) was performed on the process pipe of both assemblies with acceptable results obtained on process pipe of penetration assembly No ' and unacceptabic results on No 3. Process pipe for Penetration No 3_was replaced with material meeting specification requirements.

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