ML20147F052

Advises of Actions to Be Taken to Resolve Issue Re Integrity of American Insulated Wire Mfg Silicone Rubber Insulated Cables Meeting Certain Conditions in Containment

ML20147F052
Person / Time
Site:	05000000, Sequoyah
Issue date:	08/19/1987
From:	White S TENNESSEE VALLEY AUTHORITY
To:	James Keppler NRC OFFICE OF SPECIAL PROJECTS
Shared Package
ML082310326	List: IR 05000327/1987027 ML20147F052 ML20147F110 ML20149B937 ML20149C482
References
FOIA-87-726 NUDOCS 8803070228
Download: ML20147F052 (2)

Text

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TENNESSEE VALLtpf AUTHORITY CH ATTANOOG A. 7ENNESSEE 37401 6N 38A Lookout Place

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August 19. 1987 i

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Mr. James G. Keppler,.0lrector Office of Special Projects U.S. Nuclear Regulatory Commission 4350 East-West Highway EWW 322 Bethesda, Maryland 20814

Dear Mr. Keppler:

OccketNos.50d27:

In the Matter of the

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Tennessee Valley Authortty

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50-328 L

SEQUOYAH NUCLEAR PLANT (SQN) UNIT 2 CABLE TEST PROGRAM F

After our '.teeting on August 12, 1987, you and your staff stated that the TVA revised cable testing program, submitted by letter dated July 31, 1987, was acceptable except for one concern.

This concern was related to the int ~egrity

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of American Insulated Wire (AIW) manufactured silicone rubber insulated cables meeting certain conditions in containment.

The purpose of this letter is to advise you of the action I have directed my staff to take to resolve the issue.

It was your position that to resolve this concern TVA should test 100 percent i

of the AIW u ble to the test parameters and acceptance criteria discussed with your staff.

Specifically, the cables shall be manufactured by AIH, be insulated with silicone rubber, located inside containment of SQN unit 2, be 10 CFR 50.49 cables, supported by a 90* condulet at the top of run, anci shall have a vertical drop immediately below the 90* condulet that exceeds the requirements of National Electric Code Article 300419.

During the discussion, there was insufficient information on the population of cables that could be tested.

I stated that the exact population of condutts meeting these tetteria was uncertain although my staff previously had informed your staff th'aTthey believed there might be between 7 to'll conduits containing 33 to 50 cables.

It has since been determined that the exact population of cables meeting the statec criteria is one conduit containing i

four cables.

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8803070228 080302

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' ' ' 'Mr. James G. Koppler, Director

' August 19, 1987~

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It is our opinion that there is no technical justification to support cdditional testing of AIW silicone rubber insulated cables having a vertical.

However, in view of your firm position and in l

drop below the 90' condulet.

the spirit of cooperation, immediately following our discussion on August 12, i'

I. directed that the. testing be performed as requested.

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.Very truly yours, j

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TENNESSEE VALLEY AUTHORITY l

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IA Manager of. Nuclear Power-1 Mr. Gary G. Zech, Assistant Director cc:

i Reg *onal Inspections Division of TVA Projects Office of Special Projects 4

U.S. Nuclear Regulatory Commission

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101 Harletta Street, NW, Suite 2900 l

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Atlanta, Georgia 30323

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Mr. J. A. Zwolinski, Assistant Director for Projects Diviston of TVA Projects Office of Special Projects l

U.S. Nuclear Regulatory Commission

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4350 East-West Highway EWW 322 Bethesda, Maryland 20814 I

Sequoyah Resident Inspector

.l Sequoyah Nuclear Plant t

2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 t

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