ML20091L079

Rev 2 to Braidwood Unit 1 Cycle 5A Operating Limits Rept

ML20091L079
Person / Time
Site:	Braidwood
Issue date:	08/25/1995
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20091L044	List: ML20091L040 ML20091L079
References
NUDOCS 9508280288
Download: ML20091L079 (5)

Text

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ATTACHMENT Braidwood Unit 1 Cycle 5A Operating Limits Report (OLR)

Revision 2 i

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i 9508280288 950825 PDR ADOCK 05000456 PDR

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• REVISION 2 BRAIDWOOD UNIT 1 CYCLE 5A I OPERATING LIMITS REPORT - Fxy PORTION

' This Radial Peaking Factor Limits Report is provided in accordance with paragraph 6.9.1.9 of the Braidwood Unit 1 Nuclear Plant Technical Specifications.

The Fxy limits for RATED THERMAL POWER within specified core planes for Cycle SA 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 2.700

2) For all unrodded core planes:

Fy"'" s 1.755  ;

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: )

RTP Fy s 2.052 i 2) For all unrodded core planes:

I Fy"'" s 1.772 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 ,

1 Fo(z) s [2.501[K(Z)] for P > 0.5 and, P

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 l accompanying variations in the axial xenon and power distributions as described in l the " Power Distribution Control and Load Following Procedures," WCAP-8403, 1 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 the attached Figure for the plot of [Fo(z) x P,w] vs. Axial Core Height.

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REVISION 2 1

BRAIDWOOD UNIT 1 CYCLE 5A I

OPERATING LIMITS REPORT - MTC PORTION a) The Moderator Temperature Coefficient (MTC) limits are: )

1) The BOL/ARO/HZP-MTC shall be less positive than 0 Ak/k/ F.

d

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

b) The MTC surveillance limit is:

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 RTP stands for RATED THERMAL POWER l 1

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• BR1CSA FXY LIMIT EVALUA110N Summary of Fq vs. Core Height

. Fq SPIL Axial Position Peak Fq LIMIT 0.25038 0.6165 2.5 0.62594 1.7571 2.5 0.87632 2.1781 2.5 1.1267 2.3619 2.5 l.3771 2.4488 2.5 1.6275 2.4958 2.5 WJe N.,AIN 77, , YM90 h , ;$, ,T, >,, ,2.$.

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@2ddQJ4 i d 2.3308 lj,;2J699 2.361 10.391 2.299 10.64I 2.1572 2J53 1

' 10.891 2.094 2.3451 11.142 1.9728 2.3372 11.392 1.6042 2.3292 11.768 0.58717 2.3174 i

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Shaded area shows surveillance region. Unshaded area (top and bosom 15%)

' is ignored for this surveillaxe.

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Brtidwood Unit 1 Cycb SA R vision 2 * ' ,

FQ(Z) x P versus Core Height .

Fxy Limit Analysis -

2.6- (6.0,2.50) _,

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-a- Fry Limit Analysis Points g 1.2 ,

LOCA Limiting Envelope x - * - - Bottom Surveillance Limit  :

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- - + - - Top Surveillance Limit O  : ,

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0.8  ! {

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0.4  :

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5 0 5 -

0 1 2 3 4 5 6 7 8 9 10 11 12 BOROM TOP CORE HEIGHT (FT)

. _ _ . . __ _ _ _ - _ _ . _ - _ _ - _ _ _ _ _ _ _ _ .