ML20091L026

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Rev 1 to Braidwood Unit 2 Cycle 5 Operating Limits Rept
ML20091L026
Person / Time
Site: Braidwood Constellation icon.png
Issue date: 08/25/1995
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20091L023 List:
References
NUDOCS 9508280269
Download: ML20091L026 (5)


Text

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ATTACHMENT Braidwood Unit 2 Cycle 5 Operating Limits Report (OLR)

.I Revision 1 l l

9508280269 950825 PDR ADDCK 05000457.

p PDR

REVISION 1 BRAIDWOOD UNIT 2 CYCLE 5 OPERATING LIMITS REPORT - Fxv PORTION This Radial Peaking Factor Limits Report is provided in accordance with paragraph 6.9.1.9 of the Braidwood Unit 2 Nuclear Plant Technical Specifications.

The Fxy limits for RATED THERMAL POWER within specified core planes for Cycle 5 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:

RTP Fy s 2.052

2) For all unrodded core planes:

Fy RTP s 1.735 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 RTP s 2.052

2) For all unrodded core planes:  !

l Fy"T" s 1.817 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

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 i 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 the attached Figure for the plot of [Fo(z) x P,.i) vs. Axial Core Height.

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I REVISION 1

, BRAIDWOOD UNIT 2 CYCLE 5 ,

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

1) The BOL/ARO/HZP-MTC shall be less positive than 0 Ak/k/ F.
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 10d 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

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REVISION 1-

, BRAIDWOOD UNIT 2 CYCLE 5 l

- OPERATING LIMITS REPORT Table 1: [Fo(z)

  • Pu] vs. Axial Core Height CORE HEIGHT MAXIMUM (FEET) Fa
  • P BOTTOM 1 0.1252 0.424 ,

2 0.3756 0.844 3 0 6259 1.882 4 0.8763 2.170 5 1.1267 2.395 6 1.3771 2.488 7 1.6274 2.500 8 1.8778 2.499 ,

9 2.1282 2.285 10 2.3786 2.354 l' 11 2.6289 2.355 12 2.8793 2.378 13 3.1297 2.399 14 3.3801 2.414 15 3 6305 2.427 16 3.8808 2.243 17 4.1312 2.430 18 4.3816 2.433 19 4 6320 2.423 20 4.8823 2.409 21 5.1327 2.391 22 5.3831 2.366 23 5.6335 2.156 1 24 5.8838 2 323 25 6.1342 2.442 26 6.3846 2.456 27 6.6350 2.464 28 6.8853 2.467 29 7.1357 2.447 30 7.3861 2.289 31 7.6365 2.433 32 7.8868 2.408 33 8.1372 2.382 34 8.3876 2.380 35 8.6380 2.371 36 8.8883 2.315 37 9.1387 2.246 )

38 9.3891 2.347 39 9.6395 2.368 40 9 8898 2.377 41 10.1402 2.362 42 10.3906 2.360 43 10.6410 2.241 44 10.8914 2.162 I 45 11.1417 2.010 l 46 11.3921 1.747 1 47 11.6425 0.805 l TOP 48 11.8929 0 441 1

I i

o Braidwood Unit 2 Cycle 5 -

FQ(Z) x P versus Core Height Fxy Limit Analysis (6.0.2.50) 2.6  ?

x- x- x--x_-x - -a -x-x-x-x-m--x-x-x- -x-x-x-x- M-x-M-x x 2.4 f :T -_u g r

F~ M..*-jk:gr

- w-um -- -. .. _

= - :- -

l (12~0 2?31)

-x_x.y 2.2 )

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2 /  !

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1.8  : -

a:  ; .

$ 1.6 '

o EL W *

  • g 1.4 . .

3  ; --e--Fxy Limit Analysis Points -

w 1.2 '

. --x-LOCA Limiting Envelope og .

x  ; - - * --Bottom Surveillance Limit O

1

-- + --Top Surveillance Limit w . .

y .

i L

0.8 ,

0.6  : ".

0.4 l 2 0.2 8

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

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