ML20247L046

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Forwards Reload Safety Evaluation for Redesign of Sequoyah Unit 2 Cycle 4 & Reload Safety Evaluation Sequoyah Unit 2 Cycle 4. Analyses Demonstrate That Revised Core Reload Will Not Adversely Affect Safety of Plant
ML20247L046
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 05/25/1989
From: Shell R
TENNESSEE VALLEY AUTHORITY
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20247L052 List:
References
NUDOCS 8906020079
Download: ML20247L046 (13)
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Text

. - - . _ - _ . -- - _ _ - - - - - - - _ - - - - - - _ - - . - - _ - - . -

Wi ",:4

.. jf

,4 m . TENNESSEE VALLEY AUTHORITY

, ' CH ATTANOOGA. TENNESSEE 37401 SN 1578. Lookout P1 ace

[. ,

e i MAY 251989 I- U.S. N'uclear Regulatory Commission l ATTN: Document Control Desk l'

Washington, D.C. 20555

-Gentlemen:

In the Matter of

) Docket No. 50-328 Tennessee-Valley Authority SEQUOYAH NUCLEAR PLANT (SQN) UNIT 2 - REVISED PEAKING FACTOR LIMIT

. REPORT (PFLR) AND RELOAD SAFETY EVALUATION (RSE) FOR THE REDESIGNED SQN UNIT 2 CYCLE 4 CORE

References:

l '. TVA. letter to NRC dated January 24, 1989, "Sequoyah' Nuclear Plant (SQN) - Unit '2 Cycle 4 Peaking Factor Limit Report"-

2. TVA letter to NRC dated Jan'uary 25, 1989, "Sequoyah Nuclear Plant (SQN) - Unit 2 Cycle 4 Reload Safety Evaluation" This. letter provides' copies of Westinghouse Electric Corporation's.PFLR and .

RSE.for the redesigned unit 2 cycle 4 core. These revisions address the effects ofzthe core redesign which.resulted from the discharge of a, fuel assembly originally planned for use in cycle 4 that was subsequently

. determined to be failed. Enclosure 1 contains the revised PFLR. This report "is provided.in accordance with SQN Technical Specification 6.9.1.14. " Radial' Peaking Factor Limit Report." The PFLR report indicates that a' slight

' increase in the W(Z) values will be noted at higher burnup (beyond 4,000 megawatt days / metric. ton of uranium). Enclosure 2 contains the revised RSE.

No significant effects of the revised reload design are noted in this report.

TVA has reviewed the enclosed reports and finds them acceptable for use. .The results of these analyses demonstrate that the revised core reload will not adversely. affect the safety of the plant and that the cycle 4 redesign does-i not cause the previously accepted safety limits for any incident to be exceeded.

If you have any questions, please telephone D. V. Goodin at (615) 843-7734.

Very truly yours, TENNESSEE VALLEY AUTHORITY k N AM nager, Nuclear Licensing and Regulatory Affairs Enclosures cc: See page 2' 3o hD I

\

I 8906020079 DR 890525 p ADOCK 05000328 PDC ,

An Equal Opportunity Employer

r k ..' .

.a i

U.S. Nuclear. Regulatory Commission N'AY 251989

.cc (Enclosures): ..

Ms. S. C. Black, Assistant. Director for Projects .

TVA Projects Division U.S.* Nuclear. Regulatory Commtsston One Wh1te'. Flint, North K._ 11555 Rockvi11e Pike Rockville, Maryland 20852 Mr. B. A.-Wilson, Assistant Director

! ~' for Inspection Programs-TVA Projects Division U.S. Nuclear. Regulatory Commission L . Region II ,

101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600.Igou Ferry Road Soddy Daisy, Tennessee 37379

y .. l1: i

(; 4-

, 1' ENCLOSURE 1 Westinghouse Electric Corporation Letter dated March 7, 1989

" Tennessee Valley Authority Sequoyah Unit 2 Cycle 4 Redesign Peaking Factor Limit Report" (L30 890313 803) )

i

)

I.

=_ _ _ _ _

1 4

1 3 0- asoc3U 303

{

Westinghouse Nuclear Fuel Electric Corporation Business Unit- Q3ff2 nns e n 30 3m 89TV*-G-0028 March 7, 1989.

n REF: 1) 88TV*-G-0108 dated 12/20/88 Campbell to Robertson

2) 89TV*-G-0002 dated Mr. J. D. .

Robertson 1/10/89 Campbell to Manager, Nuclear Fuel .

Robertson-l Tennessee Valley Authority 3) 89TV*-G-0007 dated I 6N 65A Blue Ridge Place- 1/24/89 Campbell tc' 1101 Market Street Robertson Chattanooga, Tennessee. 37402

Dear Mr. Robertson:

Tennessee Valley Authority Sequoyah Unit 2 Cycle 4 Redesign Peakina Factor Limit ReDort

'The Sequoyah Unit 2 Cycle 4 Redesign Peaking Factor Limit f\ Report provides information which permits the exact determination of W(z) versus core height.as a function of cycle burnup. This report transmits the elevation dependent W(z) values. These are to be used as inputs to define the appropriate fitting coefficients for W(z) interpolations as a j function of cycle burnup and axial elevation. The W(z) values 1 are appropriate for the Cycle 4 burnup range of 0 to 16220

' MWD /MTU.

-)

The W(z) functions for Cycle 4 burnups of 150, 4000, 10000, i 15000 MWD /MTU are provided in Figures 1 - 4. Figures 1, 2, and 3 are the same as Reference 1. The revised Figure 4 shows a slight increase near the top of the core. Using three point interpolation, these W(z) functions can be used to determine W(z) values for cycle burnups between 0 and 16220 MWD /MTU.

For three point interpolation, the W(z) values from the three burnup steps closest to the measured burnup should be used.

Therefore, core operation to 4000 MWD /MTU will use the same W(z) values as the original design. A slight increase in W(z) vagueswillbenotedathigherburnup.

Fg xP A plot of the limiting points and corresponding envelope is also includekehorinformationpurposes (Figure 5 has been revised).

Very truly yours,

( Q f0 Y hanc ' E. Campbell Project Engineer I

m '

(, B g.

I'

' ~

L \ ,

cc: G. Gault T....A.; Keys .1A

['

D. H. Marks O. W. . Taylor I. R. Williamson i

k'

  • i

.c ,  !

T. /'

(- PEAKING FACTOR LIMIT REPORT FOR SEQUOYAH UNIT 2 CYCLE 4 REDESIGN RAOC OPERATION This Peaking Factor Limit Report is provided in accordance with Paragraph 6.9.1.9 of the Sequoyah Unit 2 Technical Specifications.

The Sequoyah Unit 2, Cycle 4 elevation dependent U(z) values for RAOC operation at beginning, early middle, late middle, and near end-of-life are shown in Figures 1 through 4, respectively. This information is sufficient to determine W(z) versus core height for Cycle 4 burnups in the range of 0 MWD /MTU to 16220 MWD /MTU through the use of three point interpolation. W(z) was calculated using the method described in Part-B of Reference 1.

The appropriate W( ) function is used to confirm that the heat flux hot channel factor, Fq ( ), will be limited to the Technical Specification values of: i 2,150 Fq(:) < P [K( )) for P > 0.50 and .i i

Fq( ) $ 4.300 [K(z)] for P 5 0.50 The appropriate elevation dependent W( ) values, when applied, to a -

p'bwer distribution measured under equilibrium conditions, demonstrates that the initial conditions assumed in the LOCA are met, along with the

.. ECCS acceptance criteria of 10CFR50.46. ,

(1) WCAP-10217-A, Relaxation of Constant Axial Offset Control -

Fq Surveillance Technical Specification (s

o a, i - i.

j 4 l e

HEIGHT MAX (FEET) if( 2 )

r .

.00000 1.0000 N' .20000 1.0000

. 1.55 , , , , ,

40000 1.0000

.60000 1.0000

] ,

i . , i

. i i

, i ; i

! i ,

i i

, i i 3

.50000 1.0000 i- i - i e i i i e  ! 6 i . . . 1.0000 1.0000 j y*g . . . . i i i i . . i i , i . 1.2000 1.0000

  • ' '  ! ' ' ' ' ' ' t ' ' ' i.4000 1.0000

~i i i i 'e i e i  ! 8  ! ! + 1.6000 1.0000

' '  ! i.8000 1.3385 ll 2.0000 1.3136

. , l l , l , l l

. 1.45 , , , , , , , , , , , , , 2.2000 1.2883

  • i . i a i i i i i , i . . 2.4000 1.2612

,f i e 1 i e i 6 i i e i 6 . 2.6000 1.2379 i i t ' i i i i + i e i  ! i 2.8000 1.2222

' ' ' ' ' ' ' ' ' ' ' ' ' ' 3.0000 1.2057 1.40 ' ' ' ' ' ' ' 3.2000 1.1931

!: [ l l l l l 3.4000 1.1902

, , , i , ,

i i . i , , , ,

3.6000 1.1878  !

n 3.8000 1.1837 i'

' ' ' i i , i i ,

i N1 u 4.0000 1 1788

'i*  %/** * * ,  ! i i , , .

1.1723 3e

' i t  ! I i 6 i e 4.2000

' ' i 6 ' i i e i 4.4000 1.1661 4 X * * ' <

  • i i  ! i i i i 4.6000 1.1624 s<j .y ' ' ' ' ' ' 4.8000 1.1590 1.1546 5.0000 i i i 'I i i e i ! '

i 5.2000 1.1495 l l

  • l l l l 5.4000 1.1468 i 6 , , i i i i i i i . 5.6000 1.1503 3 125 , . , , , , , , 5.8000 1.1614 (r . . i w i i i i i 6.0000 1.1722

< e . . i, 6 i 6.2000 1.1809 3 i i i i i i e 6.4000 1.1888 2 i , i . o i .,**+ 6 '

6.6000 1.1956 al.20

,( M i e i i i ' . " ,

(

f, , ..

i .I i

+!

t  !

,,3000 7.0000 1,200, 1.2045

.' l !l l .

7.2000 1.2063

, , , , ,, s+o i , . i 6 . i , 7.4000 1.2061 1.15 ,

, , . 7.6000 1.2037

- ' ' ' ' i' 4 i i  !'l* i i i 7.8000 1.1988 4 . . i ie i i i I i i i ' 8.0000 1.1915

! i ' e i i i i  ! i ! i i i

  • 8.2000 1.1816

. ' ' i ' i ' ' ' ' ' '

1.10 i , ,

8.4000 1.1685

. i - i '  ! 6  ? .' '

8.6000 . 1.5532

' ' ' ' ' 8.8000 1.1385 l

,' l [ , l , , l 9.0000 1.1299

, , , i . . , . i i , i , 9.2000 1.1295 1.05 , , , , , , , , , , , , , , , 9.4000 1,13sy

. .  ! . i ; . , i e . . . e i -

9.6000 1.1491 i

! a i a i * *  !  ! ' ' ! i ' ' ' 9.8000 1.1628 i . . . i .  ! e i i i i i e i . '

10.000 1.1743 1*00 1 .200 1.1837 0 2 4 6 8 10 12 10.400 1.0000

' ' ' *o BOTTOM CORE HEIGHT (FEET) TOP '0 800 1 0000 i 11.000 1.0000  !

11.200 1.0000 11.400 1.0000  !

11.600 1.0000 J 11.800 1.0000 i 12.000 1.0000 1 FIGURE 1 SEQUOYAH UNIT 2 CYCLE 4 RAOC

SUMMARY

OF MAX W(Z) AT 150 MWD /MTU (b

TOP AND BOTTOM 15% EXCLUCED AS PER TECH SPEC 4.2.2.2.G  !

_ ________ ____ - ______-_-_____ _ ___ _ ____ _ _ _ O

, HEIGHT NAX (FEET) W(2)

.00000 1.0000

.20000 1.0000 C 40000 1.0000

!.O .

. F ' -

.00030 1.0000 i i .  !  ! ! ' ' ' '

. !  ! i

.80000 1.0000

' . 1.0o00 1.0000 l!

l ', l l l l l l l . 1.2000 1.0000 1.50 , . . , , , . , , , . . . - 1.4000 1.0000 6 , , i , , i i  ; i i i  !  ! 1.6000 1.0000 i e i i ! i e i i i i i 1.8000 1.2339 i . I i i  !  ! ' ' I i i ' ' ' 2.0000 1.2188

' ' ' ' i ' ' ' ' '

j*g i i i i * '

2.2000 1.2034

' ' ' ' ' ' ' ' ' 2.4000 1.1879 l!

', l l l l ,

l 2.6000 1.1723 l 6  ; , , , i ,

4 i . . . 2.8000 1.1567 6 i , , , , , , , , , , . . . 3.0000 1.1421 1.40 . , , , , , , , , . , , . . 3.2000 1.1348 i i . i e i i i I !  !  !  ! 3.4000 1.1380 i i i i i i  ! i  ! t  ! 3.6000 1.1411 n 4  !  ! ' '  !

3.8000 1.1414 6 i i i i i 8 4,oooo 3,$433

' ' 4.2000 1.1428 BC lll

, l l i , ,

ll l i ; i i l l

, i ,

, l 4.4000 4.6000 1.1458 1.1482 X l '  ! i ' ' '

4 .M

-sl 6 i ,

.' . i ;

4.8000 5.0000 1.1498 1.1502 i i , i i i '  ! 6 i

  • i i 5.2000 1.1497 L 6 i

! i 4 ' '  ! ' ' ' ' 5.4000 1.1501 O i ' i ' 'i!  ! i ' ' ' ' '

+ ' '

5.6000 1.1568 i i i i i i i i i i i 1.1727 e

5.8000 ll 6.0000 1.1881

* *l* +,l

' ' ' ^

! , l ,f , 9

, 6.2000 1.2009 s i i i . j i i i , i 6.4000 1.2127 2  ; , , i ,i i i r i i i i 6.6000 1.2230 21.20 , , . , , , , , , , , . , . . . 6.8000 1.2313 O '

i i i  ! ! i 1.2377

( i i i e i t  !  !  ! 7.0000

' ' ' i* ' i '

i i i .i i i e i 7.2000 1.2418

- 4 i , i , . 6 i i i e i ogg i I '

7.4000 1.2434 1.15

,v,"'.U^^^* l li il i ,

7. 6 x0 7.8000 1.2424 1.2385 i
i l ', ,

, i i j , j i i

i  ; i ; , . .

i i 8.0000 1.2316 i i i i i , , , , , , , , e i , i i 8.2000 1.2216

. , . . . ,  ! . . . .

  • i i 8.4000 1.2082 1.10 , , , , , , , , , , , , ,

8.6000 1.1920 i i i i t i  !  ! ' i i i ' i ' ' 8.8000 1.1753

' i ' ' ' ' ' ' i ' ' ' '

6  !

9.0000 1.1652

i i i i i i i ' ' ' i '

. 9.2000 1.1610 lll 1.05 l l l l l l  ! S '000 1.1587 ll l ,

,i, 9.6000 1.1584

,i , i j , i i , , , i . , ,

.f 4 i , , i . i i i i , i . i i .,, 9.8000 1.1594

!  ;  ; 10.000 i i i i i i i e i i i e i a i ' 1.1615

10. 2 x 1.1704

' 1.00 0 4 6 8 10 12 'Od* 1. %%

2 BOTTOM TP 0000

! CORE HEIGHT (FEET) i i i . Ox 1. ww

11. 2 x 1. ww 11.400 1.0000
11. e x i . ww 11.800 1.0000 FIGURE 2 12.000 1.0000 SEQUOYAH UNIT 2 CYCLE 4 RAOC

SUMMARY

OF MAX W(Z) AT 4000 MWD /MTU

!. TOP AND BOTTOM 15% EXCLUOED AS PER TECH SPEC 4.2.2.2.G L

o o

i ..

8 4

i HEIGHT MAX (FEET) W(Z) .

}

'( .00000 1.0000

( .20000 1.0000 40000 1.0000 1.f.5 , . . . . . . , . . , ,

,eOOOO 3,0000-i i i i!

.80000 1.0000 l

i ' li '

1.0000 1.0000 l

ll , , , i ; . , 1.2000 1.0000 1.0000 1.!O , , , , , , . . 1.4000 i i i ! +  ! 6 1.6000 1.0000

. . 6

  • i 1.8000 1.1657 i i i  ! 4 ' i 2.0000 1.1586 1 45 i . -

2.2000 1.1516 i r

! 2.4000 1.1447 l , l ll li ;l  ! ll 2.6000 2.8000

-1.1380 1.1312

, , ; , e , i , l 6 i ; i , i i . . . i 3.0000 1.1231 1.40 , . , , . . . . 3.2000 1.1222 i , 6 i 1 i i! 3.4000 1.1342 i '

i t i i 6 3.6000 1.1464 l n i i 6 ' I i i 3.8000 1.1560 )

4.0000 1.1651 j JN*3 ' ' ' ' '  !

l l lll 4.2000 1.1722 -

W ll i , i i

j . . ,

i 6 i i i , 4.4000 4.6000 1.1794 1.1887 j

X , , . .  ; i i i i.. i i e i 4.8000 1.1970 4l 2* ' ' ' ' ' ' ' ' ' i '  ! '

5.0000 1.2035 e i i i i i 1 '  ! ' ' t 5.2000 1.2084

b. ' ' i i ' f 6  ! '

5.4000 1.2113.

O ' ' ' 6  ! ' i i I '

' ' . ' 5.6000 1.2160

>1.25 lll l l' , 2,* * ! * .. l . l 5 8MO 1 2255 g ,, e i i u i,, , i i i 6.0000 1.2356-

4. , , , t,

, , e , a 6 . 6.2000 1.2441 2 ii , 4 , t ! i ! i 6.4000 1.2504 2 . i i e' i i  ! i *

  • 6.6000 1.2546 21.20 , , , , ,

_.. ei . . '. .

6.8000 1.2564 LO  ! . ! i 6 .' i i  ! I i 7.0000 1.2559

. C: i ' ' ' ' "

  • I hgl lll 7.2000 1.2527 1.15 l [ *v " . ,  !

i, i i I

. . .i.

. i 7.4000

7. 60m .

1.2467 1.2379 i , , ,

,; ,, i i ij , i i i i 7.8000 1.2263

, , , , , i i i
  • i e 8.0000 1.2114

. . i , ,! i ! I i i ' ' 8.2000 1.1933 i i i i * *

. . . i . 6 8.4000 1.1762 1.10 , . , . , , , , . .

8.6000 1,ie65 .

I i i ! ' '

, i e i i 8.8000 1.1672 i ' ' ' i  !  ! 9.0000 1.1674

' ' I

, , , ll3 , l, ll l , l l l 9.2000 1.1645

. 1.05 . , , , , , , ,, , . , . . . i 9 4000 1.1606 3

, . , i . j  ; , , , , . , , i 9.6000 1.1543

, , . , , i i i 6 e i i  ! 6 -

9.8000 1.1486

. . . . . 6 6 ii e i i  ! i

  • i  ! 10.000 1.1482

' ' 'i ' ' '

i 10.200 1.1513 1

~; 1.00 10. 4 M 1. MOO i 6 8 10 12 0

g 2 4 3 BOTTOM TP 0000 CORE HEIGHT (FEET) 11.000 1.0000 11.2C0 1.0000 j 11.400 1.0000

, t1.600 1.0000 11.800 1.0000 .

FIGURE 3 12.000 1.OOco SECUOYAH UNIT 2 CYCLE 4 RAOC

SUMMARY

OF MAX W(Z) AT 10000 MWD /MTU

/ TOP AND BOTTOM 15% EJCLUDED AS PER TECH SPEC 4.2.2.2.G i

l

7_

e 1.

  • HEIGHT MAX (FEET) W(Z)

O.00000 1.0000 O.20000 1.0000 C' O.40000 1.0000 j,$$ O.60000 1.0000

, , , . , 0.80000 1.0000

. . , , i , i . 1.0000 1.0000 i . ' ' '

i 1.2000 1.0000 1*50 ' ' '

d o

, ,  ; , , , , 1.6000 0000 1.

, , , i , 1.8000 1.1837

, , . , t i i i 2.0000 1.1765 1.45 2.2000 1.1698 2.4000 1.1638 i

i , ,

2.6000 2.8000 1.1573

't.1506 1.40

. 3.0000 1.1483 i

3.2000 1.1c25 i i i i i e I i ' * '

3.4000 1.1632 3.6000 1.1764

[]

s- 1.35 i ' ' ' '

3.8000 4.0000 1.1921 l

., , 1.2106  ;

3: , , . . e+., , , , i . 4.2000 1.2273 l i i , e ' + ' '

>< ' ' ' ' ' 4.4000 1.2413 l

=  !

4.6000 1.2531 '

^

j,30 ' '

^ , ,

4.8000 1.2623 5.0000 1.2696 i Lu - . . .*

  • o , , 5.2000 1.2760 I C) '

a' ' ,

5.4000 1.2824  ;

j*7$ ' '

6 5.6000 1.2916 )

OI ' ' ' ' ' ' ' 5.8000 1.3049 6.0000 1.3177 y '

l ll *l l ,

^

l 6.2000 1.3277 i

1.20

, 6.4000 1.3350 3 , . ,, , , . , , 6.6000 1.3393 J

v) i ,

o i i  ! . i -

! i 'i i 6.8000 1.3406

(

' " i * ' ' ' ' I 7.0000

  • ! 6 ' '

!^

1.3385 7.2000 1.3330 1,1$

"?,* '

7.4000 1.3239 .

, , i . , , 4o v i 7.6000 1.3110 I

, i

. i i '

, , . 7.8000 1.2942 8.0000 1.2737 y'*10 -

8.2 1.2493

' 8.4000 1.2224

, , , , , 8.6000 1.2007i

, , . 8.8000 .1898 1.05 9.0000 1.1766 9, 000 3,1sio f i  !  ! ' ' '  ! '

l ' ' ' 9.4000 1.1497

, , , l 9.6000 1.1390 9.8000 Q.1323 1.00

O 2 4 6 8 10 12 10.000 1.1345 10.200 1.1383 10.400 1.0000 10.600 1.0000 CORE HEIGHT (FEET) 'o 8oo ' oooo BOTTOM TOP 11 000 1.0000 11.200 1.0000 11.400 1.0000 ,

11.600 1.0000 1 11.800 1.0000 12.000 t.0000 FIGURE 4 SEQUOYAH UNIT 2 CYCLE 4 RAOC

SUMMARY

OF MAX W(Z) AT 15000 MWD /MTU i

f

s. TOP AND BOTTOM 15% EXCLUDED AS PER TECH SPEC 4.2.2.2.G REV. 3/89 .1 i'

1

_ _ _ - _ _ _ _ - _ - . - - - 1

b .

i- ,

i

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Illi lili  !!Il Illl Illl Illl Illl lili !Ill illi Illl lil illi lili 11ll Illi llll lill Illi Ill i illl illi !Ill lil!

!ill 'lli Ili!

lill lil: lill Illi lIll 11ll 1111 lill !Ill Ilt! ll!<

llli l!!i litl llll ll11 Illl lii' ilil :lli lili tili llillii ili lilli

!Il!,1111 illi till slll illi liil !Iti

  • tir' 'it; iiil Illi .i t l l lili DQ illt l:t illi t il; i illi il:i illi llll Illi lill 4.' it l 'lIINI llit ill; illi ,8 0- 1,il lll1 te
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lili h i l l, lif ' f Il l "Illl till  !!Il i*tt' il l '! 'l!I Illl \'!:

8:

lIli t' ,t li l l l9 llll lill ill! !Ill 1111 lill :lli \

-,, iilj i;ii 11ll Ilil !Ill 101 Illi lill llil llll llQ_ 'l l I l l's Illi lill IllI lill ilfl !ll! ltil i ?! J

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td Ill' lili Illi llll Ill! !Ill illl ilti tilf l b III; is 1:l! ll11 Illi i;ll ;il! lili .lil {o}d li ll !i\ l illl 1Ill li'- 'lli  !!Il lill  !!!! lIll I! \

h ill! lill Illl

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i ii . 1.! .!It illl Illi Illl lil! lili illl ilil 1 1ll ill I o' l l b lill 161! illi lill illi lll! Illl ll l Illi ll!l 1111 E !lli Illi till illl ll11.1111 illi Illi Illi illi Illi :l

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lili liii illl

!ill llll ill Illi llll ll!l lil!

llll ill!

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'lil ill!

!lli Ill!

I ll l!!:

til; 'll! ;lli il'l  :!'

ll1 1
li Illi Illi ll11 I!Il !lli ill! lill Illi Illi llIl Illt !lil il'l 1111  ! !il illi ' *'

111l lill illi ilil l':

11ll litt !Ili Illl lill lill' Illi

iit ili' 'i' I'll ilii lil
llit  !!!! ilti til! lil- illi

~

I.1 lill lIll llli iill 11ll 'lll 1111 ':

Ill! l!!i lill llll fili i!!i illi !ill IIll Ill! Illi  !!It !Ill illl ll!! '

ict ,lii

!!ll lil! illi llll ll11 lill Illl Ill! lil ill;  !;li :lli Illi llil I!ll lill lit  : !!! .ill !I ll!I'ili! '! t i o ill: 1:ii Illi Ill! Illi Illi lill

! ',1 - '

l' lil !It! till I!!' ili! i tii ,'l:i  !: ' i;

  • 80 6 7 8 9 10 11 12 0 1 2 3 4 5 TOP BOTTOM FIGURE 5 SEQUOYAH UNIT 2 CYCLE 4

( MAXlMUM (FO P(REL)) VERSUS AXIAL CORE HEIGHT DURING NORMAL CORE OPERATION REV. 3/89 j

i

- i

y .n ,

,g. _

k

, ENCLOSURE 2 Westinghouse Electric Corporation Letter Dated March 6, 1989

" Tennessee Vall'ey Authority

?. Sequoyah Unit 2 Cycle 4 Redesign Reload Safety Evaluation"

, (L30 890307 801) i 1

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Westinghouse

, L Electric Corporation -

~ Nuclear Fuel Business Unit Ba 3912=

Pinsturgn Pennsylvania 15230 3912 '-

89TV*-G-0027 March 6, 1989 REF:'1) 88TV*-G-0101' dated'.11/23/88 s

N.. Campbell to J. Robertson Mr. J. 'D. ~Robertison 2

Manager,;, Nuclear Fuel Tennessee Valley: Authority b

'6NL65A Blue Ridge Place

=1101' Market: Street Chattanooga, Tennessee: 37402-D4ar Mr. Robertson:

Tennessee Valley Auth'ority LSequoyah Unit 2 Cycle 4 Redesign Reload Safety' Evaluation

-The'Sequoyah. Unit l2 Cycle'4 loading pattern was changed when-

'('~ , assembly.P39'was removed. .The Reload Safety Evaluation.was

-evaluated due._to the revised loading pattern changes.-

Enclosed,are 10 copies of~the Sequoyah Unit 2l Cycle:4-

~Redesi'gn' Reload' Safety Evaluation.

iSincerely, '

b-Iancy E.. Campbell Project' Engineer.

.cc: ~G. Gault T.:A. Keys D. H.: Marks-

-O.. W. Taylor I. R..Williamson M. Burzynski'

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