ML20058B204

Forwards Peaking Factor Limit Rept for Cycle 5 Redesign. Requests Exemption from 60-day Reporting Requirement

ML20058B204
Person / Time
Site:	Sequoyah
Issue date:	10/23/1990
From:	Medford M TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9010300013
Download: ML20058B204 (10)

Text

....

TENNESSEC VALLEY AUTHORITY CH ATTANOOO A, TENNESSEE 374o1 6N 38A Lookout Place 00T 231980 U.S. Nuclear Regulatory Commission ATTN Document Control Desk Washington, D.C.

20555 Gentlemen In the Matter of

)

Docket No. 50-328 Tennessee Valley Authority

)

SEQUOYAli NUCLEAR PLANT (SQN) - UNIT 2 PEAKING FACTOR LIMIT REPORT FOR CYCLE 5 REDESIGN As required by SQN Unit 2 Technical Specification (TS) 6.9.1.14, enclosed is the Cycle 5 Peaking Factor Limit Report. Unit 2 is scheduled for initial Cycle 5 criticality on November 11, 1990.

Since core redesign was anticipated because of suspected leaking fuel assemblies, the report was not submitted 60 days before criticality. This was discussed with Jack Donohew of your staff on September 10, 1990. TVA requests an exemption to the 60-day reporting requirement as allowed by TS 6.9.1.14.

No commitments are contained in this submittal.

Please direct questions concerning this issue to J. D. Smith at (615) 843-6172.

Very truly yours, TENNESSEE VALLEY AUT110RITY ip w.k G.44

(

Mark O. Medford, Vice President, Nuclear Assurance, Licensing,.

and Fuels Enclosures cct See page 2

';10G 9010300013 901023 PD:

ADOCK 0500932G P

PDC h00$

An Equal Opportunity Employer 0gg

U.S. Nuclear Regulatory Commission

[){* 231990 cc (Enclosure): Ms. S. C. Black, Deputy Director Project Directorate II-4 U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. J. N. Donohew Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 Mr. B. A. Wilson, Project Chief U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 o + .L' __________1___._______

9 e 0 0 ENCLOSURE PEAKING FACTOR LIMIT REPORT FOR SEQUOYAH UNIT 2 CYCLE 5 REDESIGN (L38 901015 807) ' I r

~ L38 901015 807 Westinghouse Commercial Nuclear 8c:3912 Electric Corporation Fuel Division P ftsburgh Pennsylvania 15230 3912 October 15, 1990 9CTIV*-G-0102 Mr. T. A. Fays, Panager Ebel Fabrication and Utilization Ennessco Valley Authority 1101 Market Street BR 6N 60A Chattanooga, Tennessee 37401

Dear Mr. Keys:

'IDMESSEE VALI.EY AUIHORITY SEQUOYAH AND WATIS BAR NUCLEAR ICWER PI.A! TIS SE000YAH UNIT 2 CYCLE 5 PEAKI1G FACIOR IJMIT REFORT m e Sequoyah Unit 2, Cycle 5 Peakiry Factor Limit Report provides informtion which permits the exact determination of W(z) versus core . height as a function of cycle burnup.. Eis report transmits the elevation-deperrient W(z) values. Rese are to be used as inputs to define the appropriate fitting coefficients for W(z) interpolations as a function of - cycle burnup arrl axial elevation. The W(z) values are appropriato for the Cycle 5 burnup rango of 0 to 16600 MWD /MIU and a delta-I band of +6, -15% delta-I at 100% power and +20, -31% delta-I at 50% power. The W(z) functions for Cycle 5 burnups of 150, 4000,.10000, 14000 MWD /MIU are provided in Figures 1-4 of this memo. Usirq three point . interpolation, these W(z) functions can be used to determine W(z) values for cycle burnupo between 0 and 16600 MWD /MIU. For three point ' interpolation, the W(z) values fran the three burnup steps closest to the measured burnup should be used. T A plot of the limitiry FOxPrel Points arti conwgraling envelope is also included for information purposes (Figure 5).- Should you have any questions regarding this report, please do_ not hesitate to call or write. "l . Sincerely, h .f&cf N. R., Metcalf Project Dyineer crFD Projects ' IGM:mid cc: I. R. Williamson

l PEAKINC FACTOR LIMIT REPORT FOR SEQUOYAH UNIT 2 CYCLE 5 RAOC OPERATION This Peaking Factor Limit Report is provided in accordance with Paragraph 6.9.1.14 of the Sequoyah Unit 2 Technical Specifications. The Sequoyah Unit 2, Cycle 5 elevation dependent W(:) 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(:) versus core height for Cycle 5 burnups in the range of 0 MVD/MTU to 16600 MWD /MTU through the use of three point interpolation. W(:) 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, F (:), will be limited to the Technical n Specification values Df: F ( ) $ 1.12 (K(:)) for P > 0.50 and 9 P F (:) $ 4.64 (K(:)) for P $ 0.50 q The appropriate elevation dependent W(:) values, when applied to a power distribution measured under equilibrium conditions,_ demonstrate 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 k 7

4 I.b) su 150 i I i. i i i e H*i9ht MAX , e i, (Feetl

Wirl, j

i.. . e i e i i,

• 0.0000 1.0000 1*4b
• 0.0000 1.0000

.. i i i e e i

• 0.2000 1.0000

.. i i. i e i i,

• 0.4000 1.0000 i e i

i

• 0.6000 1.0000 e

i i i. i6 i i i e i i i ' '

• 0.8000 1.0000 e i i i e i. i e 1,0000 1,0000 3

1.40 ,, i . i.2000 1,0000

• 1.4000 1.0000 i

i i i i i i i i i e i i e i e i i

• 1.6000 1.0000 i e i i.

i e i i e a i i,, 1,8000 1.3231 i i e i. e i i t i I I i i 8 2.0000 1.2980 i e i i i e i i e i 2.2000 1.2724 j 1.35 2.4000 t.2511 i ,, i i i i e i e i i i ( i i i i i 2.6000 1.2321 2.8000 1.2121 ' I ' I ' ' 3.0000 1.1927 ha 3.2000 1.1785 ss 3.4000 1.1729 6 ' g1.30 a f i, 3.6000 1.1724 3.8000 1.1728 i i.. i i e i 6 i e 6 i, 4.0000 1.1719 4.2000 1.1700 i ! I 8 8 le$ a i + i * . 6 t 6 i ' ' 4.4000 1.1673 4.6000 1.1637 Lul.25 e i e i 6 i e 8 i ' i 4.8000 1.1598 e i 5.0000 1.1537 CJ ,, i , i j i i i,, ,^ 5.2000 1.1467 4'Ioah 5.4000 1.1510 5.6000 1.1634 ' '+ e i QC a 5.8000 1.1754 <t i i e i i P st.20 8.0000 1.1863 6.2000-1.1962 5 ^ 6.4000 1.2047 p

• • e 8.6000 1.2117 y) o,'o.' +

6.8000' 1.2172 7,0000 1.2209 i

• e i

1.15 7.2000 1.2227 7,4000 1.2224 7.6000 1.2197 7.8000 1.2144 8,0000 1.2070 6

• i i e 8,2000 1.1968 i i i i

. i e i 1.10 8.4000 1.180s 8.6000 1.1688 8.8000 1.1709 i i . i i i a e i. 9.0000 1.1801 9.2000 1.1905 8 i ' ' i i.. i i e i t 6 e i 9.4000 1.1992 . 6 6 9.6000 1.2078 1.0a, 9.8000 1.2249 t t ' t 8 i i ! ' 10.000 1.2567 ' i i.. -t e i * ' i-i 10.200 1,2g09

• 10.400 1.0000 i

. i i i, I e I ! I i i '

• 10.000 1.0000'

. e > i i e i i.

• 10.800 1.0000 1.00 0

2 4 6 8 10 . 12

• $1.000 1.0000
• 15.200 i.0000-CORE HEIGHT IFEET)

' 11 800 1 0000 \\ TO;P ' BOTTOM

• 11.600 1.0000 e 11.800 1,0000
• 12.00o 1.0000 i

FK3URE 1 .I SEQUOYAH UNIT 2 CYCLE 5 j RAOC

SUMMARY

OF MAX W(Z) AT 150 MWD /MTU TOP AND BOTTOM 15% EXCLUDED AS PER TECH SPEC 4.2.2.2.G

4 1.50 su 4000 l l' H'eet)ight MAX it i i i e i Wizi (F i 6 4 i

• 0.0000 1.0000 1+45
• 0.2000 1.0000 e

i i , i

• 0.4000 1.0000 6 e ii.

i j i i i i i

• 0.6000 1.0000 l,

, 6 i,,

• 0.8000 1.0000 i 1
• I 8

? i i t i i e 1,0000 1,0000 s s a ' i i I ' i i i i e 1.2000 1.0000 1.40 . 1,4000 1.0000 ' 1.6000 1.0000 , i e i i 6 e i i e i i . i 1.4000 1.2999 i 6 i i e i e e i i 1 2.0000 1.2787 2.2000 1.2570 8 ' i ' ' I i 8 2.4000 1.2355 e e i. i i i i e i i e ,1.35 2.6000 1.2i30 i i, 4 6 e i e i e i l 6 ! i l l 2.8000 1.1906 3.0000 1.1750 es 3.2000 1.1672 ha I ' 8 ' i 6 i i I ' 3.4000 1.1643 %s a t 6 i i a i e i 6 3.6000' 1.1623 8 e i y1.30 3.8000 1.1596 , s 4.0000 1.1559 X e 4 i i i e i e a 6 i e i i 4.2000 1.1508 6 ! I . i e i t i t i i i e 6 4.4000 1.1469 a i 4.6000 1.1458 2 I i 6 .. i 6 i e i le**, i i t u.1.25 i 6 4.8000 1.1426 iei i >'i4

• - i i i e e

6 i. 5.0000 i,i4iB C) 5.2000 1.1491 5.4000 1.1623 I i i e I i e! I t 8 ' i i 5.6000 1.1782 ' i e i 8 6 ' >' 8 + i e 5.8000 1.1945 Of I . ' s i i i a i i .

• e i i 6.0000 1.2096 4

6.2000 1.2232 22.20 1 ,, i 6.4000 1.2353 2 ?. 6.6000 1.2457

)

6.8000 1.2543 y) 6'a 6 I ' i e i 7.0000 1.2608 i

• I
• '+a_. -

7.4000 1.2669 i e i. i i 7.2000 1.2651 i. i i i e i i 1.15 7.6000 1.2661 i-i i e i e i e ! i 6 e i i 7.8000 1.2624 e i i i i 6 8.0000 1.2558 e i i i e i e i i i 8.2000 1.2460 3.4000 1.2332 e > e i i i e 1.10 8.6000 1,2169 8.8000 1.1993 e i 6 i i i i e i e i i i e i 9.0000 1.1932 ! 6 ' i ' ' i ' 9.2000 1.1965 6 f I i i i 4 i i 6 6 i + ' e i 9.4000 1.2044 i 6 s. i e : i i i e i e i i 9.6000 1.2154 1.05 9.8000 1.2276 10.000 1.2393 -4 ' I f ' i a i i I 10.200 1.2512-I ! i 8 6 I i I 8 e i e 10,400 1,0000 t -i i i i e l l i i I e i i e 10.600 1.0000

• 10.800-1.0000 4

, i i., , i, e i i 1.00 .-11.000 1.0000 0 2 4 6 8 K) 12 = 11.200 1.0000 COREHEIGHT (FEET) TOP

• 11.Soo 1.oo00 BCnrTOM e 11.800 1.0000
• 12.000 1.0000 i

? FIGURE 2 1', SEQUOYAH UNIT 2 CYCLE 5 RAOC

SUMMARY

OF MAX W(Z) AT 4000 MWD /MTU ' TOP AND BOTTOM 15*. EXCLUDED AS PER TECH SPEC 412.2.0

4 1.50 BU 10000 i i i e i i i s a = Height MAX i i i e i . i i i i, i,, i i i i e i i e i e i (Feet) Wert j*($

• 0.0000 1.0000 i

' i i

• i i * '

i i '

• 0.2000 1.0000 e

e i e i i t i e i I i '

• 0.4000 1.0000 e

i e i ! i i 6 i

• O.0000 1.0000 e i i i e i
• O.8000 1.0000 i e i i i i

. i i i e a i e i i , i i I e i i e 1.0000 1.0000 e 1.2000 j*(Q 1',.0000 i e e i e i a i i i ! e i

• 1 oooo

. 1,40oo i e i e e i i i l i i i l i e 1.6000 1.0000 i i i e i i e i i i i e i 1.8000 1.2376 2.0000 1.2255 i i e i i i i i l 6 ! i e 2.2000 1.2140 ' i ' i, i i i i i i i i, J'3$ 2.4000 1.2049 2.6000 1.1973 s. i i e i i i e i i i i i e 2.8000 1.1889 'S i i i i i i i e 1 ( i i i 3.0000 1.1780 b4 e i e i e i e 3.2000 1.1717 i i, e i %s 3.4000 1.1750 a++ i ' ' 5 '30 . 'i 3.6000 1.1804 . i . i i i t ',2 3.8000 1.1862 i e i e i

• i i i '.

i i e 4.0000 1.1933 i e i i 4.2000 1.2001 <C e i i e i i i ^ i 4.4000 1.2070 25 ,, i e i. 4 4 i e i, 4.6000 1.2145 I ' tgj*73 4.8000 1.2209 ' i ' i e i I ' ' i

• 5.0000 1.2238 C) 5.2000 1.2254 i i i i

6 vt i i e i i i t i i ^,oi e. i i e i i 5.4000 1.2382 i i, 5.6000 1.2566 , i e o-e ~ t i i e i i, I Og 5.8000 1.2703

s t.20 6.0000-1.2816 ct o

' i a i e i e i 6.2000 1.2911 lE e," e i 6.4000 1.2979 ^,? ", ;a i ', o e i i !

D 6.6000 1.3023

,e i i U) 8.8000 1.3040 e i 6 e i e i e , i, .. i 7.0000 1.3029 i i e i i i ' ' 1.I5 7.2000 1.2990 i. i i 7.4000 1.2920 i, i. e j i i e i 7.5000 1.2820 7.8000 1.2888 i e i i i. i i 8.0000 1.2528 i i i i i

• 8.2000 1.2339

., 'i 8.4000 1.2101 1.10 i e 8.6000 1.1880 8.8000 1.1753 e i i e i i e i i 9.0000 1.'706 i.. .i i i e i i e i, 9.2000 1.1721 ! I ' 6 9.4000 1.1774 9.6000 1.1832 i-.. 1.05 9.8000 1.1882 i i e i e i i ,, e , i i ie i i i i i 10.000 1.1938-10.200 1.2034 , j , i i i e 10.400 1.0000 e i e i e i i i i I i i i l' e 10.600 1.0000 - i i e i i i e 10.800 1.0000 1 C0 8 10 12 ' 11 000 'S 0000 0 2 4 o . 11.200-1.0000 CORE HEIGHT (FEET) - 11.400 1.0000 TOP = 11.600-1.0000 BOTTOM e 11.80o 1.0000 e 12.000 1.0000 FIGURE 3 l SEQUOYAH ' UNIT 2 CYCLE 5 RAOC

SUMMARY

OF MAX W(Z) AT 10000 MWD /MTU

• TOP AND-BOTTOM 15% EXCLUDED AS PER TECH SPEC 42JJ.G

.'.5-so - 4 f 1.50 BU 14000 i e e i . e i e i e i i e i Height MAX , e i i. i i e i e i i treets wari e, , e i i. e i,

• 0.0000 1.0000 j,($

s 0.2000 1.0000 i i e e e i i i

• 0.4000 1.0000 1 4 i

i i i * ' i t i i I

• s 0.6000 1.0000 i i 6 i e i i e i j i i

e

• 0.8000 1.0000

, i 6 i ; i. e 1,0000 1,0000 . 1.2000 1.000o 1.40 i i

• 1.4000 1.0000 6

i i t i i t 6 e i i i

• 1.6000 1.0000

,e, t 6 i i 1.8000 1.2561 i t 2.0000 1.2419 , g, - i ^, i 6 2.2000 1.2275 ^ 2.4000 1.2i29 . 1*35 5 i I 2.6000 1.1980 1 I i i 6 i i i ie i i I i e i 2.8000 1.1837 3.0000 1.1728 , i i a i i e i,, 6 i 3.2000 1.1717 b4 I a j ,e i i i e i i i. 3.4000 1.1825 %s i

• 3.6000 1.1938 3: 1*30 e

e i i l t

• i i i

8 3.8000 1.2052 . i

• 4 e i a

i 4.0000 1.2191 >( e e i. I i ! 6 i i i, i i io e i i i. i 6 4.2000 1.2311 4.4000 1.2409 gg i e i

• i 8

6 i i i 8 i i i 4.6000 1.2488 - i

• i 1*25

.'. T 4.8000 i.2526 t i t i i - t 5.0000 1.2590 C) I i e i e i 5.2000 1.2752 i 1 6 6 6 ,~ 5.4000 1.2965 , i i i i. i 6 i v 5.6000 1.3175 I ,i ' ' QC i 6 e 5.8000 1.3349 i ' i'- =;1,20 6,0000 1.3494 s i e o i 6.2000 1.3612 { i 6.4000 1.3697 2 6 i, ie 6.6000 1.3750 D i,, i * ^, i 6.8000 1.3769 y) 6 i i 6 e i e i 6 e I i i ' 750000 1.3753 7.2000 1.3700 e e i e i i e i a i . i ' 1.15 i 7,4000 i,3609 7.6000 1.3480 , i, i e i.. 7.8000 1.3310 i,, i i , i i i , e, 8.0000 1.3105 i i. e e i 6 . i e a ' i 8.2000' 1.2864 i i 8.4000 1.2571 1.10 8.6000 1.2284-8.8000 1.2076 , i

i

.. e i a i i. e i, 9.0000 1,1961 i a 4. e i . i i i e i i i e 9.2000 1.1869 I i 9.4000 1.1769 9,6000 1,1815 i e i a i a i e e i e i

• i e

i 1.05 s.8000 1.1956 i,. 10.000 1.2068 i i, i i e i e i i i 10.200 1.2180 C e 10,400 1,0000 t i i I i '

• 10.600 1.0000 e'10.800 1.0000 e

6 i i 1.00 e 11.000 1.0000 0 2 4 -6 8 10 12 . 11.200 1.0000 CORE HEIGHT (FEET)

• " *oo

' oooo TOP

• 11.600 1.0000 BCyrTOM e 11.800-1,0000 e 12.000 :

1.0000 4 FIGURE 4 .i SEQUOYAH UNIT 2 CYCLE 5 RAOC

SUMMARY

OF MAX W(Z) AT 14000 MWD /MTU-

• TOP AND BOTTOM 15% EXCLL*DED AS PER TECH SPEC 4121G

.j

2 illi i li Illi till 'll! lil III Ill l II Ill illi ll!! ...y, ,j;; i;j;

, i j;i;

..i. 2.3

,,,, ; g, i

,,;7p Illi lili_ lill ll l illi i ll _ l 'o l *, ' l li Illi %Illi ll11 llll l i l l' lill ll l lll1 lill il I l< l ll 11ll DM n'Pic i,i l l Il l I, I b ll 11ll ll lill i l l'i Illi l l '. I, 11 I i llll lill >l l ! 'lll lill I ll 11 I I ll l .I l til ll l Illi l lill Illi llo lill I ll ll l ! ll l 11 !Il ll l 1111 , ;i l l 2.0

j

j ;

Illi Illi j ll l t Illi i ll ll l l Il ll 6 til. 'llil Ill!

'g ilit lill Illi lll l ll Illi i ll ll l

11 *. l l l till lill ' 'o : 1 lill llll Ill I ll Illl I ll ! Il I ll llll Illl< llli g1.8 g ,, p, illi i!il l ll ll l Illl Illi !I l 'lll I ll illi Illi II:i lil lill Illi lIll Illi l I

lli i

l Illi Ill lll1 Li l i '!i! ! li iiil iil! ii l l i 'lll i !i!l 'lli 1!l! u '6 lii 1: !I lill Illi Illi Illi illi Il I ll Ill lill it. tii tiil lill lil! !Ill Illi 'lll i ll l It lli til! .:'t 35 !,,i .,i; 2

I I!il lill lill till Illi Ill ll Illi lil Illi 1;

}I'4 .ii li 'l til! !all

lli

'lil 111 Illi Ill! lil !il: s

I l'.i Ill.

illi lill ill' lll llll 1111 111 illi 1*3 l'il till Il l IIll 'lli .Ill I ll 1 II .lil til! i-ii Jil llll lill 11 I Illi !lli Ill 1 ll l ll Ill illi ilti 1 i !Ill Illi i ll!! llll Illi 11 l l-l l 11 'lll ill! Illi till Illi i lill Illi lill 11 I il I il Ill! !!Il Illi l'I till Illi Ill l ll Illi Illi ll l l l l llll lill lill lill Illi Ill l ll Illi Illi ll l l l l illi Illi Illi 1.0 .l!I Ill l I ll l l l l Il llll ll l 11i1 lill Illi l 'l ll l ll l l 1 ll Illi lill I l l 'c lill Illi l ll ll l ll ll l Ill ll llll I!il lill l ll ll l 11 Il l Ill 11 Illi 'g 0 -1 2 3 4 5 6-7 '8 9 10 11-12 CORE HEIGHT (FEET) 1 FIGURE 5 SEQUOYAH UNIT 2 CYCLE S MAXIMUM (FO

• P(REL)) VS AXIAL CORE HEIGHT DURING NORMAL CORE OPERATION 1}}