ML20125A760

Requests Addl Info to Permit Completion of Reviews.Response Required by 790831 to Maintain Review Schedule

ML20125A760
Person / Time
Site:	Sequoyah
Issue date:	08/07/1979
From:	Rubenstein L Office of Nuclear Reactor Regulation
To:	Parris H TENNESSEE VALLEY AUTHORITY
References
NUDOCS 7908170222
Download: ML20125A760 (3)

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UNITED STATES ma E)g g g NUCLEAR REGULATORY COMMISSION ws.smacron, o.c.20sss Docket Nos.: 50-327/328 Mr. H. G. 'Parris Manager of Power ~

Tennessee Valley Authority 500A ' Chestnut Street; Tower II ,

Chattanooga, Tennessee 37401 -

SUBJECT:

REQUESTS FOR INFORMATION ON SEQUOYAH Enclosed are requests for information in several areas for which we require your response in order to complete our reviews.

To 1979.

keep on schedule, we need a completely adequate response by August 31, Sincerely,

/< L. S. Rubenstein, Acting Chief

/( Light Water Reactors Branch No. 4 Division of Project Management

Enclosure:

As stated cc w/e'ncl.:

See next page m

7 008170

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ENCLOSURE Request for Information on Sequoyah 212.0 REACTOR SYSTEMS BRANCH .

Confirm the points discussed in the phone call of July 24, 1979, with respect to operator actions related to the detection of a boron dilution event at the time of reactor shutdown. The l points discussed which require confirmation are the following: I (a) Within what time interval after shutdown will the operator make his first check of the setting of the High Flux at i Shutdown alarm?

(b) Within what margin from background level will the operator maintain this High Flux at Shutdown alarm based on his first check and at each subsequent check?

231.0 CORE PERFORMANCE BRANCH During a recent refueling outage at a W plant Salem 1), strap i

damage was observed on a number of fueT spacer (grids.

It is not known whether the damage occurred during the initial core loading or during the refueling withdrawal. What assurances can you-provide that the same type of grid damage will not be experienced at Sequoyah 1 and 2?

12.0 RADIOLOGICAL ASSESSMENT BRANCH 331.1 Describe precautions taken to prevent inadvertent personnel access during fuel transfer to the very high radiation areas in the vicinity of the fuel transfer tube. If there is sufficient '

i permanent shielding to assure acceptable radiation levels in l

adjacent potentially occupied areas, provide relevant plan and

i. elevation drawings.

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iennessee Valley Authority ces: .

Herbert S. Sanger, Jr. Esq.

General Counsel .

Tennessee Valley Authority 400 Commerce Avenue EllB33 Knoxville, Tennessee 37902 .

Mr. E. G. Beasley

• Tennessee Valley Authority /

400 Commerce Avenue W10Cl31 C Xnoxville, Tennessee 37902 Mr. Michael Harding

• Westinghouse Electric Corporation P. O. Box 355 Pittsburgh,' Pennsylvania 15230 Mr. David Lambert Tennessee Valley Authority 400 Chestnut Street Tower !!

Chattanooga, Tennessee 37401 1

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