ML19254D514

Forwards Request for Info Re Ice Condenser/Upper Head Injection,Info Available to Operator During Severe Transient & Info on Advantages & Disadvantages of Filtered & Vented Containment.Info Required for ACRS Meeting in Nov 1979

ML19254D514
Person / Time
Site:	Sequoyah
Issue date:	10/16/1979
From:	Rubenstein L Office of Nuclear Reactor Regulation
To:	Parris H TENNESSEE VALLEY AUTHORITY
References
NUDOCS 7910260115
Download: ML19254D514 (3)

Text

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1. o UNITED STATES NUCLEAR REGULATORY COMMISSION o

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WASHINGTO N. O. C. 20555

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OCT 161979 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:

Requests for Information on Sequoyah Enclosed are requests for information that are needed by October 25, 1979, for the forthcoming ACRS meeting of early November 1979.

Please call if there are any questions.

Sincerely, G 'N

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s L. S. Ru'benstein, Acting Chief Light Water Reactors Branch No. 4 Division of Project Management

Enclosure:

As stated cc: See next page 8 250 IIS 7910260

e Tednessee Valley Authority g7g ccs:

Herbert S. Sanger, Jr. Esq.

General Counsel Tennessee Valley Authority

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400 Commerce Avenue EllB33 Knoxville, Tennessee 37902 Mr. E. G. Beasley Tennessee Valley Authority 400 Commerce Avenue W10Cl31 C Knoxville, 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 II Chattanooga, Tennessee 37401

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ENCLOSURE Request for Information 1.

Discuss the special features of the ice condenser /UHI plant which would require considerations in the light of the TMI-2 accident.

The discussion should include hydrogen control and inert gas blockages in the primary system.

2.

Discuss the information which would be available to the operator in the control room in the event of a severe transient.

3.

Provide a copy of the Sequoyah Emergency Control Room Procedures.

Please identify those procedures which were added or changed as a result of the TMI-2 accident.

4.

Discuss all possible plant transients in which operator action may increase the consequences of the transients.

5.

Discuss the reliability of the decay heat removal systems following anomalous transients.

6.

Discuss the advantages and disadvantages of a filtered and vented containment.

7.

Discuss specific recommendations that are being made for the auxiliary feedwater system for Sequoyah. What is the dependence on AC power?

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