ML19338C748

Forwards Core Degradation Program,Vol 1:Hydrogen Study & Core Degradation Program Vol 2:Rept on Safety Evaluation of Interim Distributed Ignition Sys, in Response to NRC 800828 Ltr.Cross Ref of NRC Questions & Util Answers Encl

ML19338C748
Person / Time
Site:	Sequoyah
Issue date:	09/02/1980
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	Schwencer A Office of Nuclear Reactor Regulation
Shared Package
ML19338C749	List: ML19338C748 ML19338C750 ML19338C751
References
NUDOCS 8009030662
Download: ML19338C748 (3)

Text

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j TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II September 2, 1980 Director of Nuclear Reactor Regulation Attention: Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. !!uclear Regulatory Commission  ;

k'ashington, DC 20555 '

l

Dear Mr. Schwencer:

In the Matter of the Application of ) Docket No. 50-327 Tennessee Valley Authority )

In response to your letter to H. G. Parris dated August 28, 1980, enclosed are the following documents related to hydrogen buildup I and control in the Sequoyah Nuclear Plant Unit 1 Containment.

Enclosure 1: A cross reference to each of the nine items requested by the enclosure to your letter.

Enclosure 2: TVA's Report on the Core Degradation Program Enclosure 3: TVA's Report on the Safety Evaluation of the I

Interim Distributed Ignition System (IDIS)

As revisions to these responses for Sequoyah Nuclear Plant are required, they will be submitted as change pages for the enclosed documents. Instructions will be included for incorporating the change pages.

Very truly yours, TENNESSEE VALLEY AUTHORITY 7

k . .

bb

' . M. Mills, Madager Nuclear Regulation and Safety Subscribe an sworn [obefore me this . day of A t 6 41S80.

/

1AZ k.< r Notap Public U My Commission Expires M Enclosures THIS DOCUMENT CONTAINS nn equai oppo,tunity empiove. P00R QUAUTY PAGES 80090s0662

$ . ENCLOSURE 1

. J p* '

Cross Reference Between NRC Questions and TVA Answers Contained in the Hydrogen Report l

l NRC Question Text Which Provides Response

1. Location and number of ignitersSection IX, Subsection B, Vol.2 (Discuss why the IDIS is Appendix L, Vol. 2 adequate)

2. H monitoring and mixing 2

Section IX, Subsection C, Vol.2 (Discuss why the current Appendix K, Vol. 2 prc isions are adequate for l interim operation with the IDIS) 3 Ability of igniters to function Section IX, Subsection B, Vol. 2 in turbulent, flowing atmosphere Appendix N, Vol. 2 I i 4. Procedures and strategy for Section II, Subsection C, Vol.2 ignitor operation Appendix R Vol. 2 (Discuss the criteria to be used Section IX,' Subsection B, Vol.2 fn evaluating igniter strategy, i.e., will igniters be turned on i

for a signal derived from SI, containment high pressure, pressurizer pressure) . t S. Analysis models Section IX, Subsection E, Vol.2 i

Clasix Appendix T, Vol.2 Solution scheme a.

b. Containment modeling

c. Input parameters  :

y y--~--- --r e y- -- - + ,--=-e -r .- -- --wv, -n---- - - -+ wen'---w -r-me-- =-w-7'

O

./ .

6. Analysis results Section IX, Subsection E, Vol.2

a. Mixing of constituents Appendix U, Vol.2 I b. Sensitivity studies Appendix U, Vol.2

7. Effects of local detonations Section IX, Subsection D, Vol.2 j or turbulent deflagrations Section VIII, Subsection C, Vol.2

{

Appendix H, Vol.2

8. Survival of essential equipment Section IX, Subsection D, Vol.2 in event of H burning Section VIII, Subsections D&E, Vol.2 2

1 i

Appendix F, Vol.2' "

i

, Appendix G, Vol.2 Appendix I, Vol.2

.' 9 Procedures and results from Section IX, Subsection B, Vol.2

! interim testing of igniters Appendix M, Vol.2 1

4 1

i l

l l

e 8

-m -

-,e-. = ~ . , y -~ ,,e., -

7-, , , .- .-.-%,-e--_vw-r- ,, w-,,_,. ._,y%..~..- ,--y.,- - -

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