ML20203D753

Rev 2 to Ndit 970160, Operating Limits Rept (Olr) for Braidwood Unit 2,Cycle 7

ML20203D753
Person / Time
Site:	Braidwood
Issue date:	12/09/1997
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20203D644	List: ML20203D641 ML20203D665 ML20203D753 ML20203D772
References
NDIT-970160, NDIT-970160-R02, NDIT-970160-R2, NUDOCS 9712160281
Download: ML20203D753 (9)

Text

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e NDIT 970160

'e

• Rev.2 P:ge 2 of 9 OPERATING LIMITS REPORT (OLR) for BRAIDWOOD UNTT 2 CYCLE 7 1.0 OPERATING LIMITS REPORT This Operating Limits Report (OLR) for Braidwood Station Unit 2 Cycle 7 has been prepared in J accordance with the requirements of Technical Specification 6.9.1.9.

The Technical Specifications affected by this report are listed below; f

3/4.1.1.3 Moderator Temperature Coefficient 3/4.1.3.5 Shutdown Rod Insertion Limit 3/4.1.3.6 Control Rod Insertion Limits 3/4.2.1 Axlal Flux Difference 3/4.2.2 Heat Flux Hot Channel Factor 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor

, 2.0 QEESATING LIMITS The cycle-specific parameter limrts for 'he specifications listed in Section 1.0 are presented in tne following subsections. These limits have been developed using the NRC approve'1 methodologies specified in Technical Specification 6.9.1.9.

2.1 Moderator Temoerature Coefficient (Specification 3/4.1.1.3) 2.1.1 The Moderator Temperature Coefficient (MTC) limits are:

a. The BOUARO/HZP-MTC shall be less positive than +3.5 x 10 Ak/k/*F.

b, The EOUARO/RTP MTC shall be less negative than -4.1 x 10" ak/k/*F.

2.1.2 The EQUARO/RTP 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.

4 where. BOL stands for Beginning of Cycle Life 2

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 P

9712160281 971209 PDR ADOCK 05000456 P pg

1 NDIT 970160

, Rev.2 Page 3 of 9 OPERATING LIMITS REPORT (OLR) for BRAIDWOOD UNIT 2 CYCLE 7 2.2 Shutdown Rod Insertion Limd (Specifica. tion 3/4.1.3.5) 2.2.1 All shutdown banks shall be withdrawn to at least 228 steps.

2.3 Control Rod insertion Limits (Specification 3/4.1.3.6) 2.3.1 The control banks shall be limited in physical insertion as shown in Figure 1.

2.4 Axial Flux Difference (Specification 3/4.2.1) 2.4.1 The AXIAL FLUX DIFFERENCE (AFD) target band is +3,12% of the target flux difference.

2.4.2 The AFD Acceptable Operation Limits are provided in Figure 2.

E

I NDIT 970160 l

' Rev.2 Page 4 of 9 OPERATING LIMITS REPORT (OLR) for BRAIDWOOD UNIT 2 CYCLE 7 -

l

- 2.5 Heat Flux Hot Channel Factor (Specification 3/4.2.2) l 2.5.1 Fo(Z) s [FE"/P][K(Z)] for P > 0.5 Fo(Z) s [F$"/0.5][K(Z)] for P s 0.5 where: P = the ratio of THERMAL POWER to RATED THERMAL POWER j F$" = 2.60 K(Z)is provided in Figure 3.

2.5.2 Fh = F7,"[1 + 0.2(1 P)]

FJ" limits within specified core planes shall be:

a. For the lower core region from greater than or equal to 0% to less than 22%:

1) F"J's 3.119 for all core planes containing bank "D" control rods J

2) F"J" s 1.776 for all unrodded core planes

b. For the lower core region from greater than or equal to 22% to less than or equal to 50%:

1) F"y" s 3.119 for all core planes containing bank *D" control rods

2) F"J" s 1.865 for all unrodded core planes

c. For ths urper core region from greater than 50% to less than or equal to 100%;

1) F7f ; 2.251 for all core planes containing bank *D' control rods 1

2) F"J" s 1.954 for all unrodded core planes 2.5.3 A plot of [Fo(z)

• Pa.,) vs Axial Core Height is provided in Figure 4 and Table 1 contains the data plotted in Figure 4.

2.6 Nuclear Enthalov Rise Hot Channel Factor (Specification 3/4.2.3) -

FL s F"". [1.0 + PFw(1.0 P)]

~

where: P = the ratio of YHERMAL POWER to RATED THERMAL POWER i

F"J" = 1.70 PF3. = 0.3 i

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g NDIT 970160 Rev.2 s Page 5 of 9 i

OPERATING LIMITS REPORT (OLR) for BRAIDWCOD UhTT 2 CYCLE 7 Figure 1:

Control Bank Insertion Limits Versus Percent Rated Thermal Power (29%,228) (79 %,228) 228

- 220 a

200 -

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0 to 20 30 40 50 60 70 80 90 100 Relative Power (Percent)

t NDtT 970160

. Rev.2 s Page 6 of 9 '

OPERATING LIMITS REPORT (OLR) for BRAIDWOOD LHIT 2 CYCLE 7 FIGURE t Axial Flux Difference Limits As A Function of Rated Thermal Power ,

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< NDIT 970160

+ Rev.2 Page 9 of 9 OPERATING LIMITS REPORT (OLR) for BRAIDWOOD UNIT 2 CYCLE 7 Table 1: IFofz)

• ppa vs. Axial Core Height Fq SPil Core Height (feet) Max Fa x P UME 0.2504i  :.0.80641 <

, - . - 2.6000 E0.6259 i 1.9402 < . M" 2.6000 ?

a 0.6763: -

2.28350 # < $ 2.6000lr i 1.1267> 12.3950 ' 12.60005

1.3771- t 2.4843; M 12.6000l-

4. 1.1.6274 L & , a12.5589ksa awd2.8000 a.

1.8778 2.5957 2.6000 2.1282 2.4210 2.6000 2.3786 2.5350 2.6000 2.6290 2.5183 2.6000 2.8793 2.5941 2.60C0 3.1297 2.5366 2.6000 3.3801 2.4804 2.6000 3.6305 2.4296 2.6000 3.8808 2.1998 2.6000 4.1312 2.3579 2.6000 4.3816 2.3662 2.6000 4.6320 2.3740 2.6000 4.8823 2.3800 2.6000 5.1327 2.3836 2.6000 5.3831 2.3785 2.6000 5.6335 2.1989 2.6000 5.8839 2.3806 2.6000 6.1342 2.4763 2.5956 6.3846 2.4649 2.5875 6.6350 2.4538 2.5794 6.8854 2.4906 2.5712 7.1357 2.4830 2.5631 7.3861 2.4169 2.5550 7.6365 2.4929 2.5468 7.8869 2.5007 2.5387 8.1372 2.5022 2.5305 8.3876 2.4984 2.5224 8.6380 2.4877 2.5143 8.8884 2.4285 2.5061 9.1388 2.3355 2.4980 9.3891 2,4086 2.4899 9.6395 2.4153 2.4817 9.8899 2.4425 2.4736 10.1400 2.4573 2.4654

'10.3910 2.4411' 2.4573':-

-10.6410. 2.3153  ; 2.4492' 510.8910 - 2.2897 - '2.4410--

11~ 1420.

. :2.2042- i2.4329

, 111.3920 < 1.C902 :2./MS -

-11.7680 ' O.9052 2.4125 Unshaded arer shows surveillance region.

Shaded area (top and bottom 15*a) is ignored.

4 Braidwood Unit 2 Cycle 7 Operating Limits Report Resisjon 2