ML20137R767

Part 21 & First Interim Deficiency Rept SCR Bln 4621 Re Partially Fused Welds on A500 Structural Tubing.Initially Reported on 851226.Testing Program for Tubing & Chemical Analysis of Matls Initiated

ML20137R767
Person / Time
Site:	Bellefonte
Issue date:	01/29/1986
From:	Gridley R TENNESSEE VALLEY AUTHORITY
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-86, REF-PT21-86-059-000 PT21-86-059-000, PT21-86-59, SCR-BLN-4621, NUDOCS 8602130404
Download: ML20137R767 (2)

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m January 29,'1986

.5 BLRD-50-438/86-02 m

.BLRD-50-439/86-01 U.S. Nuclear Regulatory Connaission '

. Region II Attention:

Dr. J. Nelson Grace,: Regional Administrator 101 Marietta Street, NW,' Suite 2900 m

. Atlanta, Georgia. 30323-

Dear Dr. Grace:

BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - LONGITUDINAL BUTT WELDS ON A500 STRUCTURAL TUBING ARE ONLY' PARTIALLY FUSED - BLRD-50-438/86-02, BLRD-50-439/86 FIRST INTERIM REPORT The subject deficiency was initially' reported to NRC-0IE Inspector Steve Weise on December 26, 1985 in accordance with 10 CFR 50.55(e) as SCR BLN 4621. Enclosed is our first interim report. We expect to submit our next

' report on or about six months before fuel load. We consider 10 CFR Part 21

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applicable to-this deficiency.

The delay in submittal of this report was discussed with Art Johnson on January 29, 1986.

'If there are any questions, please get in touch with R. H. Shell at FTS'858-2688.

Very truly yours, TENNESSEE V LEY AUTHORITY R.

. Gridle Manager of icensing Enclosure cc:

Mr.. James Taylor, Director (Enclosure)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Conunission Washington, D.C.

20555 Records Center (Enclosure)

Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 c

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9602130404 060129 e

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- An Equal Opportunity Employer -

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.y ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 LONCITUDINAL BUTT WELDS ON A500 STRUCTURAL TUBING ARE ONLY PARTIALLY FUSED BLRD-50-438/86-02' and BLRD-50-439/86-01 SCR BLN 4621' 10 CFR 50.55(e)-

FIRST INTERIN REPORT Description of Deficiency Approximctely 1200. linear feet of ASTN A500 Grade B 3x3xl/4 structural tubing exhibit partially fused longitudinal, butt weld joints. This condition was noted during the fabrication of a support. The apparent cause was improperly cut material (insufficient width) that did not. allow the fusion weld to be completely formed.

j Safety Implications This material is used to fabricate various miscellaneous steel features, including but not limited to pipe supports, conduit supports, cable tray supports, instrument tube supports, and platforms. _It is unknown at this time if any failures could develop from the use of this material. A possibility exists that some of this material was transferred from Bellefonte to Watts 4

i Bar.

In addition, material similar to this is used at other TVA plants.

s Corrective Action The corrective action has not been determined at this time. A testing program is_being initiated to determine the physical properties (bending, axial, and torsional capacity) of the structural tubing.

In addition, a chemical analysis will be. performed to provide a comparison of the chemical properties on material test reports for the material heats shipped to the site. This should allow us to determine the exact amount of deficient material if the l

percentage of trace chemicals has sufficient differentiation.

A final report will be filed on this deficiency upon determination of the scope of the deficiency and a corrective action plan but no later than six

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' months before fuel load.

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