ML19254E892

Forwards Draft Interim Position Re Environ Qualification of Class IE Instrumentation & Electrical Equipment.Requests Info Identified in Encl.W/O Encl

ML19254E892
Person / Time
Site:	Sequoyah
Issue date:	10/17/1979
From:	Rubenstein L Office of Nuclear Reactor Regulation
To:	Parris H TENNESSEE VALLEY AUTHORITY
References
NUDOCS 7911050019
Download: ML19254E892 (4)

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$ \\ ).r,( (',j NUCLEAR REGULATORY COMMISSION

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%;,vhg OCT 171979 Docket Nos.: 50-327 50-328 Mr. H. G. Parris Manager of Power Tennessee Valley Authority 500A Chestnut Street Tower II Chattanooga, Tennessee 37401

SUBJECT:

ENVIRONMENTAL QUALIFICATION OF CLASS IE INSTRUMENTATION AND ELECTRICAL EQUIPMENT We have been evaluating the environmental qualifications of Class IE instru-mentation and electrical equipment on a generic basis as well as plant specific both for equipment supplied by the NSSS supplier and equipment supplied for the Bal ance-o f-Pl ant. As a result of our evaluation we have requested and you have supplied information regarding this matter. The information provided by you is substantial and is presented in sections of the Final Safety Analysis Report as well as by reference to Westinghouse Topical Reports and specific equipment testing reports.

As you know, requirements for environmental qualificaticr. - f Class IE i nstru-mentation and equipment have been evolving as a result of considerable effort expended by both the staf f and nuclear industry. As a result of these efforts we have developed an interim position regarding environmental qualifications.

A draft copy of this position is enclosed.

Prior to completion of our review of the qualification related documentation you have submitted as part of the Sequoyah application, we plan to assess the degree to which the qualification programs described in that documentation comply with the guidelines contained in our interim position. As part of this assessment, we plan to identify that equipment which was not qualified in accordance with our guidelines and, provided it is justified, we will establish a basis for the acceptability of these deviations. To assist us in completing this task promptly, we request that you provide the information identified in the Enclosure.

This information should allow us to complete our evaluation and make the deter-mination that the environmer.tal qualification of Class IE instrumentation and electrical equipment is acceptable.

619 7911 050 4i 1267 338

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Mr. H. G. Parris CCi *.

' 13 Please infor;n us within seven days after receipt of this letter of your schedule for providing this infonnation.

Sincerely,

\\t u.de.d L. S. Rubbnstein, Acting Chief Light Water Reactors Branch No. 4 Division of Project Management Enclosures :

As stated cc: See next page e

1267 339

Tennessee Valley Authority g

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Herbert S. Sanger, Jr. Esq.

General Counsel Tennessee Valley Authority r.'.

400 Commerce Avenue f'

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Knoxville, Tennessee 37902 Mr. E. G. Beasley Tennessee Valley Authority 400 Commerce Avenue W10Cl31 C Knoxville, Tennessee 37902 g,;.,

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Mr. Michael Harding i

Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 Mr. David Lambert Tennessee Valley Authority 400 Chestnut Street Tower II g-Chattanooga, Tennessee 37401 N

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NSIC Local PDR TIC Docket Files (w/o enc.)

ACRS (16)

LWR-4 File S.

Varga M.

Williams B. Moore R Satterfield L. Rubenstein Project Manager Licensing Assistant (2)

Attorney, ELD I&E (3) 1267 34I

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