ML19331D663

Forwards Procedure IP-18, Plant Release Rate Calculations & Graphs of Containment Activity as Function of Monitor Reading,In Fulfillment of 800811 Commitment to Provide Correlation Procedure

ML19331D663
Person / Time
Site:	Sequoyah
Issue date:	08/29/1980
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	Schwencer A Office of Nuclear Reactor Regulation
Shared Package
ML19331D664	List: ML19331D663 ML19331D666
References
NUDOCS 8009030436
Download: ML19331D663 (3)

Text

_

e TENNESSEE VALLEY AUTHORITY CH ATTANCOG A. TENNESSEE 374o1 400 Chestnut Street Tower II August 29, 1980 Director of Nuclear Reactor Regulatica Attention: Mr. A. Schwencer, Cnief Licensing Branch No. 2 Divisice of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Schwencer:

In the Matter of the Application of ) Decket Nos. 50-327 Tennessee Valley Authority ) 50-328 In my letter to you dated August 11, 1980, TVA censitted to provide a procedure for correlation of out-of-containment radiatien :ncnitor readings with in-containment adiation levels.

On August 22, 1980, TVA implemented a revised Radiological Emergency Plan for Sequoyah Nuclear Plant. Sectica 5.4 of the TVA-REP as submitted by my letter to H. R. Denten dated July 21, 1980, describes the method to be used for predicting probable releases of radioactive gas based on existing and potential plant conditions including containment radiation levels. Enclcsed is a copy of Implementing Precedure (IP)-18 which details the ao. tion taken for correlating in-containment radiation levels with scnitor readings and subsequent determinatien of potential releases.

Also enclosed are graphs of containment activity as a function of moniter reading which illustrate the type of correlation obtained through the use of IP-18.

Very truly yours, TENNESSEE VALLEY AUTHORITY I . .

.. M. Mills, ge.

Nuclear Regula ion and Safety Sworn to and subscribed befcre se $@!

this M E day of / -

1980 $

EW, ?A'  % :p l l Notary Public My Ccamission Expires -

O

Enclosure THIS DOCUMENT CONTAINS l I

.80090302/$**""**'"," POOR QUALITY PAGES

l s

. .o -

\ ,

• \ l l

ENCLOSURE I l Range of Xe-133 Activity (uc/cc) vs. Dose Rate l At Monitor (mR/hr) Assuming A Modified 1 TID 14844 Isotopic Spectrum for Post I

,, Accident Times 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />

• i l i i 6 ,

6 I I I I ' e i l I I I i A

! l l l l l E l

= l l l l l l l I I I l l l l l l' i l l l l

I a

5 l-e , ,

I

= i l

il l l I

l i

ll ii l-- ._

i i i .

O I ll l l l I i I ll t 1 i l l l l l S

n l ll l l l l l l 5 il u

E l l 8 i! .

l

?

7 l

n I '

l 'l ~ll  ;; l l  ;  ;

! I I il i t i  !

I l i l I i i l t- ll l 1

~

I I I ll 'l l l l il ll l l l 1

-l ,-- l l 2 103 104 105, Radiat. ion Monitor 1-RM-90-2 Reading (mR/hr)

Sheet 1

. . - . - _ , _ - . . . - . - _ _ _ - - _ _ _ ~ _ _ _ _ _ _ - - _._ _ _ _ _ _ _ _ - . . . . _ , _ _ _ _ - - _ _ _ _ . _ _ _ _

7_ .

Range of Xe-133 Activity (uc/ce) vs. Dose Rate At Monitor (mR/hr) Assuming A Modified

- TID 14844 Isotocic Spectrum for Post Accident Times 3 Hours I

LT t I i t i 1 i i

a C

k E

2a

=

3 u

?

l 103 : i -

I -

t I ammmy d

Y= l l l l\

3 E >+-

l

~~

12 13 10 0 10I Radiation Monitor 1-RM-09-2 (mR/hr)

. . _ , . . . _ . . . _ _ _ _ _ _ _ _ _ - . _ _ _ _ _ _ .