ML20129H285

Cycle 7 Operating Limits Rept

ML20129H285
Person / Time
Site:	Byron
Issue date:	09/30/1996
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20129H233	List: ML20129H229 ML20129H285
References
NUDOCS 9610080064
Download: ML20129H285 (7)

Text

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Attachment Byron Unit 2 Cycle 7 Operating Limits Report J

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j 9610000064 960930 PDR ADOCK 05000455 p PDR (p:\96b%tm960253h093096)

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. Pag 31 of 6 Byron Unit 2 Cycle 7 Operatina Limit Report - Fxy Portion This Radial Peaking Factor Limits Report is provided in accordance with paragraph 6.9.1.9 of the Byron Unit 2 Nuclear Plant Technical Specifications.

The Fxy limits for RATED THERMAL POWER within specified core planes for Cycle 7 shall be:

a) For the lower core region from greater than or equal to 0% to less than or equal to 50%:

1) For all core planes containing bank "D" control rods:

Fy "" s 1.946 Cycle Burnup 2 0 MWD /MTU

2) For all unrodded core planes l

Fy"" s 1.748 0 s Cycle Burnup s 2,000 MWD /MTU Fy"7" s 1.762 Cycle Bumup > 2,000 MWD /MTU b) For the upper core region from greater than 50% to less than or equal to 100%:

1) For all core planes containing bank "D" control rods:

Fy"" s 1.946 Cycle Burnup 2 0 MWD /MTU

2) For all unrodded core planes:

Fy"" s 1.721 0 s Cycle Burnup s 2,000 MWD /MTU Fy"" s 1.721 Cycle Bumup > 2,000 MWD /MTU These Fxy(z) limits were used to confirm that the heat flux hot channel factor FQ(z) will be limited to the Technical Specification values of Fo(z) s I2.501[K(Z))for P > 0.5 and, P

I Fo(z) s [5.00][K(Z))for P s 0.5  !

assuming the most limiting axial power distributions expected to result from the insertion and removal of control Banks C and D during operation, including the accompanying variations in the axial xenon and power distributions as described in the

" Power Distribution Control and Load Following Procedures," WCAP-8403, September, 1974. Therefore, these Fxy limits provide assurance that the initial conditions assumed in the LOCA analysis and the ECCS acceptance criteria of 10 CFR 50.46 are met.

See Figures 1 and 2 for the plots of [ Fa'(z) x P,.i) Versus Axial Core Height and Tables 1 and 2 for the data plotted in Figures 1 and 2.

._ . _ _ _ _ . - _ = _ _ _- . ~ . - .. . - - - .

Pago 2 of 6 i , .

Byron Unit 2 Cycle 7 2

Operatina Limit Report - MTC Portion 4

i a) The Moderator Temperature Coefficient (MTC) limits are:

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1) The BOL/ARO/HZP-MTC shall be less positive than 2.991 x 10-5 Ak/k/ F.

4 2) The EOL/ARO/RTP-MTC shall be less negative than -4.1 x 10" Ak/k/ F.

b) The MTC surveillance limit is:

4 The 300 ppm /ARO/RTP-MTC should be less negative than or equal to

-3.2 x 10" Ak/k/ F.

where

BOL stands for Beginning of Cycle Life ARO stands for All Rods Out HZP stands for Hot Zero Thermal Power EOL stands for End of Cycle Life i

RTP stands for RATED THERMAL POWER 1

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i Pcgs 3 of 6 Table 1 BYRON UNIT 2 CYCLE 7 Fa LIMIT EVALUATION Summary of Fa vs. Core Height Cycle Burnup Range of 0 MWD /MTU to < 2000 MWD /P.TU Fo SPIL C xe Height (feet) Maximum Fo x P LIMIT e 0.2504

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a, 0.6013 ~> 2 5000 o l 06250 i  %' 1.7619 ',0 2.8000 l

. : 0.0763 < ' 2.2006 ' J '

'2.5000 l

1.1267

[%. 2.378T

+ ',

2.6000 s

l 1.3771 S 2.4477 e ,. > 2 5000 ' ' I

_ _ n .L h iL LG 2.1282 2.2941 2.5000 2.3786 2.4242 2.5000 2.6289 2.4P95 2.5000 2.8793 2.44,58 2.5000 3.1297 2.4"81 2.50']O 3.3801 2.4397 2.5000 3.6304 2.4989 2.5000 .

3.8808 2.005B 2.5000 1 4.1312 2.4928 2.5000 l 4.3816 2.4913 2.5000 l 4.6320 2.4930 2.5000 4.8823 2.4758 2.5000 j 5.1327 2.4532 2.5000 5.3831 2.4205 2.5000 5.6335 2.2035 2.5000 5.8838 2.3617 2.5000 6.1342 2.3409 2.4957 6.3846 2.3416 2A878 6 6350 2.3688 2.4799 6 ',853 2.3914 2.4720 ,

7.1357 2.3928 2.4640 I 7.3861 2.2593 2.4561 7.6365 2.4407 2.4482 7.8868 2.4400 2.4402 8.1372 2.4292 2.4323 8.3876 2.4097 2.4244 8.6380 2.3824 2.4165 8.8883 2.3077 2.4085 9.1387 2.2230 2.4006 9.3891 2.2851 2.3927 9.6393 2.2676 2.3847 9.8809 2.3019 2.3768 10.140 2.3262 , - 2.3689 c, >- p 7 -

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~'2 3610 """~"'

' .'10.641

- , 2.166/ - ' .' 2.3530 10 891 - :'

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,,, 241424 -

2 3461 .

'G ' 2.0001 >- ,

. 2.3372 '

~ i11.142 s +

11 392 ' O

' .1.828 y;' '

2 3292 >

' 11.768 ' ' O F64 ^ ' '2.3174. ' ~

Unshaded area shows surveillance region.

Shaded area (top and bottom 15%) is ignored for this surveillance.

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Pagn 4 of 6

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Table 2 BYRON UNIT 2 CYCLE 7

. Fa LIMIT EVALUATION j Summary of Favs. Core Height Cycle Burnup Range of 2000 MWD /MTU to EOL Fo SPIL Core Height (feet) Maximum Fo x P LIMIT s

. > 0.28N , 0.0002 2 60003 +'

0,9390 - ' ,' "1,7902: ,

~4.4768 ';['s' - ' '; 2.2242 ~, ,

, '2.8000}

2 6000Pl '

1,273 . ,c- n 2.3978 ~m ;: 2.8000h . .

i ' 1.9771 ' , ,; s 14874' ,,l ' J C' 2 8000$ N >^

l Zd82Kih &w2,4996% al2.8000&f!En 1.8778 2.4902 2.5000 2.1282 2.2981 2.5000

, 2.3786 2.4285 2.5000 2.6289 2.4338 2.5000 2.8793 2.4502 2.5000 3.1297 2.4752 2.5000 3.3801 2.4868 2.5000 3.6304 2.4960 2.5000 3.8808 2 .028 2.5000 4.1312 2.4899 2.5000 4.3816 2.4884 2.5000 ,

4.6320 2.4824 2.5000 l 4.8823 2.4653 2.5000 5.1327 2.4428 2.5000 5.3831 2.4102 2.5000 i 5.6335 2.1941 2.5000 5.8838 2.3516 2.5000 l 6.1342 2.3409 2.4957 i 6.3846 2.3416 2.4878 l 6.6350 2.3688 2.4799 6.8853 2.3914 2.4720 7.1357 2.3928 2.4640  ;

7.3861 2.2593 2.4561 '

7.6365 2.4407 2.4482 7.8868 2.4400 2.4402 8.1372 2.4292 2.4323 8.3876 2.4 M 7 2.4244 8.6380 2.36 + 2.4165 8.8883 2.30/7 2.4085 9.1387 2.2230 2.4006 9.3891 2.2851 2.3927 9.6395 2.2676 2.3847 9.8899 2.3019 2.3768 10 140 2 3262 2 3689

,, , "10 $91"^7~ "'"?':'"2.3167 l'"~~' '" '"""" 2.381' O P"'

16.441 '

J ' 2.1987

', ' 2.3630 ; t 10 891 , ' 2.1424 ,, 4 . - } 2 346df ,

, 11.142 ' / s >

2.0061 o ' '4- ;2.3372: '

11302 . ; ,, ,1.6808 - ' ~,

' ' 2 3292 ' , a,.

' 11.768 '- 0.8786 - - 2.3174 -

Unshaded area shows surveillance region.

Shaded aree Np and bottom 15%) is ignored for this surveillance.

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Pagn 5 of 6

. Figure 1 i Byron Unit 2 Cycle 7 FQ(Z) P versus Core Height Cycle Burnup Ra. age of 0 MWD'MTU to <2000 MWD /MTU l

(60.250) l

$ 2m ,

I I l i l j i .! i 1 2.4000  ! *l # T I~ T I __

l 2.2000

. K 2.0000 I: L d i-1 l l*

• 3 1.8000 m *

' --+--Faj Umn Analysis Pomis LOCA Limning Envelope j l,  !

1.6000 - - qr w *

• Bonom Surveillance Lima -

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$3.4000 .. _. ..L + Top Surveillance Limn

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! 6 u..l.2000 4 -- l I' '

4 h  ! l'

- I: l i.0000 i 4

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, 0.8000 l

!! lt I 0.6000 4  :. 'j _,

l 0 1 2 3~ 4 5 6 7 8 9 10 1I 12 l

soTTou CORE HEIGHT (FT)

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Hgure 2 Byron Unit 2 Cycle 7 FQ(Z) x P versus Core Height Cycle Burnup Range of 2000 MWD /MTU to EOL yg (60.250)

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. 173 p T 7 g j t  :

020.2.30

,.,.  ! [ :V V VV TA-  ;

a' 2.0000 /

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1.8000 -i -  ! I l l + Fay Limit Analysis Points l l 3,6000 . LDCA Limiting Envelope di f l

• Bottom Surveillance Umu  :

$ .4000 .:._. .- . ,

• Top Surveillance Limit l

lt ,

6 w I.2000 l.0000 l .

'  : 1 0.s000 - ,

• ! { I O 6000 --

O l 2 3 4 5 6 7 8 9 10 11 12 BOTTOM COM HEIGHT M TOP l

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