ML20247B718

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Cycle 8 Operating Limits Rept
ML20247B718
Person / Time
Site: Byron Constellation icon.png
Issue date: 05/01/1998
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20247B717 List:
References
NUDOCS 9805080217
Download: ML20247B718 (13)
v • d • e


Text

.

Attachment Byron Unit 2 Cycle 8 Operating Limits Report 1

l 1

i 9805000217 980501 PDR ADOCK 05000455 P PDR (p:\98byltrs\980140. doc) l t

NDIT NFS 93C0082 i

SEQ. 00 Page 2 of 13

. OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 1.0 OPERATING LIMITS REPORT I This Operating Limits Report (OLR) for Byron Station Unit 2 Cycle 8 has been prepared in accordance with the requirements of Technical Specification 6.9,1.9.

l The Technical Specifications affected by this report are listed below:

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 Axial Flux Difference .

3/4.2.2 Heat Flux Hot Channel Factor and K(Z) 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor 4.2.2.2 Fxy Radial Peaking Factor 2.0 OPERATING LIMITS The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the following subsections. These limits have been developed using the NRC approved ,

methodologies specified in Technical Specification 6.9.1.9. '

2.1 Moderator Temperature 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 +3.6 x 10 4 Ak/k/ F.
b. The EOL/ARO/RTP MTC shall be less negative than-4.1 x 10 Ak/k/ F.

2.1.2 The EOL/ARO/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. l 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for RATED THERMAL POWER 2.2 Shutdown Rod insertion Limit (Specification 3/4.1.3.5) 2.2.1 All shutdown banks shall be withdrawn to at least 228 steps.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.

. 1 NDIT NFS-9800082 SEQ. 00 l Page 3 of 13 1

OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 l l

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.

2.5 Heat Flux Hot Channel Factor (Specifications 3/4.2.2 and 4.2.2.2) 2.5.1 Fo(Z) s [FSTP/P][K(Z)] for P > 0.5 Fo(Z) s [F$'"/0.5][K(Z)] for P s 0.5 I

where: P = the ratio of THERMAL POWER to RATED THERMAL POWER I l

FSTP = 2.60 I I

K(Z) is provided in Figure 3.

i 1

2.5.2 Fh = F"J"[1 + 0.2(1 - P))

F"y" limits within specified core planes shall be: 4 For Core Life from greater than or equal to O MWD /MTU to less than 1,000 MWD /MTU:

a. For the lower core region from greater than or equal to 0% to less than or equal to 27%:
1) F"y" $ 2.379 for all core planes containing bank "D" control rods

! 2) F"y" s 1.921 for all unrodded core planes

b. For the lower to middle core region from greater than 27% to less than or equal to 50%:
1) F"y" s 2.379 for all core planes containing bank "D" control rods
2) F"y" $ 1.936 for all unrodded core planes
c. For the middle to upper core region from greater than 50% to less than or equal to 100%:
1) F"y" s 2.379 for all core planes containing bank "D" control rods i
2) F"y" 5 2.014 for all unrodded core planes l

For Core Life from greater than or equal to 1000 MWD /MTU to less than or equal to 6000 MWD /MTU:

d. For the lower core region from greater than or equal to 0% to less than or equal to 50%:
1) F"J" s 2.163 for all core planes containing bank "D" control rods
2) F"J" s 1.811 for all unrodded core planes
  • 1

)

NDIT NFS-93G3032 SEQ. CD Page 4 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8

e. For the upper core regiori from greater than 50% to less than or equal to 100%:
1) F"y" s 2.163 for all core planes containing bank "D" control rods
2) F"y" s 1.864 for all unrodded core planes For Core Life from greater than 6000 MWD /MTU to End of Core Life:

l l f. For the lower core region from greater than or equal to 0% to less than or equal to 50%:

i

1) F"J" s 2.163 for all core planes containing bank "D" control rods
2) F"y" $ 1.827 for all unrodded core planes
g. For the upper core region from greater than 50% to less than or equal to 100%:

i

! A

1) FyP s 2.163 for all core planes containing bank "D" control rods
2) F"J" s 1.864 for all unrodded core planes 2.5.3 A plot of [Fo(z)
  • Pa ] vs Axial Core Height for burnups greater than or equal to O MWD /MTU and less than 1,000 MWD /MTU is provided in Figure 4, and Table 1 contains the data plotted in Figure 4.

! A plot of [Fo(z)

  • Pn ] vs Axial Core Height for burnups greater than or equal to l 1000 MWD /MTU and less than or equal to 6000 MWD /MTU is provided in Figure 5, and Table 2 contains the data plotted in Figure 5.

A plot of [Fo(z)

  • Pn ] vs Axial Core Height for burnups greater than 6,000 MWD /MTU to End of Core Life is provided in Figure 6, and Table 3 contains the data plotted in Figure 6.

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

FN s F%"[1.0 + PFas(1.0 P)]

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

)

F" ," = m PF6s = 0.3 f

NDIT NFS-980@82 SEQ. 00 Page 5 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 Figure 1:

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

$ f [

y /

/ /

/

  1. ANKB 180 #

E

!100 Ir- >

n (100%,161)

(0%,162) l 1

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/ l BANK C l /

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i 80 / /

Be / / [ BANK D l 40

/ /

/

(0%,47) 30 (30%,0) 0 0 10 20 30 40 50 60 70 00 90 100 Relative Power (Percent) i l +t

NDIT NFS-9800082 SEQ. 00 Page 6 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 FIGURE 2: Axici Flux Difference Limits As A FuncMon of Rated Thermal Power

=

100-h UNACCEPTABLE UNACCEPTABLE E OPERATION 80 OPERATION 7

5 60 y ACCEPTABLE C OPERADON i y (-31,50) 49 (31,50)

U I

  • \

20 -

0 50 -40 -30 20 -10 0 10 20 30 40 50 Flux Difference (al) %

i I

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NDIT NFS-9800082 SEQ. CD Page 7 of 13 f

I OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 l

Figure 3
K(Z)- Normalized Fo(Z) As A Function of Core Height l

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F NDIT NFS-980C082 SEQ. 00 Page 8 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 l Figure 4: FQ(Z)*P versus Core Height l Cycle Burnup Range of 0 MWD /MTU to < 1000 MWD /MTU

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NDIT NFS-9803082 SEQ. 00 Page 9 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 Table 1

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[Fq(z)*Prel] vs. Axial Core Height Cycle Burnup Range of 0 MWD /MTU to < 1000 MWD /MTU No. Core Height (feet) Max. FQ*P Fq Limit  ;

1* 0.2504 0.4490 2.6000 l 2* 0.6259 2.0587 2.6000 3* 0.8763 2.5041 2.6000 4* 1.1267 2.5492 2.6000 5* 1.3771 2.5250 2.6000 6' 1.6275 2.5676 2.6000 )

7 1.8778 2.5991 2.6000 8 2.1282 2.4146 2.6000 9 2.3786 2.5406 2.6000 10 2.6290 2.5740 2.6000 11 2.8753 2.5809 2.6000 12 3.1297 2.5817 2.6000 13 3.3801 2.5991 2.6000 ,

14 3.6305 2.5993 2.6000 15 3.8809 2.3918 2.6000 16 4.1312 2.5828 2.6000 17 4.3816 2.5817 2.6000 18 4.6320 2.5695 2.6000 19 4.8824 2.5538 2.6000 20 5.1327 2.5332 2.6000 21 5.3831 2.5038 2.6000 22 5.6335 2.2836 2.6000 23 5.8839 2.4528 2.6000 24 6.1343 2.5544 2.5956 25 6.3846 2.5619 2.5875 I ) 26 s 6.6350 2.5716 2.5794 27 6.8854 2.5702 2.5712 28 7.1358 2.5519 2.5631 29 7.3862 2.3859 2.5550 30 7.6365 2.5450 2.5468 31 7.8869 2.5217 2.5387

( 32 8.1373 2.4964 2.5305 l 33 8.3877 2.4601 2.5224 34 8.6380 2.4277 2.5143 35 8.8884 2.3444 2.5061

, 36 9.1388 2.2608 2.4980 37 9.3892 2.3254 2.4899  ;

38 9.6396 2.2962 2.4817 39 9.8899 2.2490 2.4736 l 40 10.1400 2.1974 2.4654

( 41' 10.3910 2.1594 2.4573 42* 10.6410 2.0105 2.4492 43* 10.8910 2.0310 2.4410 44* 11.1420 2.0743 2.4329 45' 11.3920 1.7120 2.4248 46* 11.7680 0.4096 2.4125 l

Asterisked (*) items (top and bottom 15%) are not considered for the surveillance region.

1 L_

NDIT NFS-98G0082 SEQ. CO Page 10 0f 13 OPERATING LIMITS REPORT (OLT,) for BYRON UNIT 2 CYCLE 8 Figure 5: FQ(Z)*P versus Core Height Cycle Burnup Range of 21000 MWD /MTU to < 6000 MWD /MTU a (6.0, 2.60) 9 0

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- 1 NDIT NFS-9aCC082 SEQ. CD Page 11 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 Table 2

[Fn(z)*Prel] vs. Axial Core Height Cycle Burnup Range of 21000 MWD /MTU to s 6000 MWD /MTU

( No. Core Height (feet) Max. FO*P Fq Limit l

1* 0.2504 0.3765 2.6000 2* 0.6259 1.7217 2.6000

3* 0.8763 2.1278 2.6000 I

4* 1.1267 2.2199 2.6000 5* 1.3771 2.2516 2.6000 6* 1.6275 2.3178 2.6000 7 1.8778 2.3785 2.6000 8 2.1282 2.2479 2.6000 9 2.3786 2.3928 2.6000 10 2.6290 2.4313 2.6000 l 11 2.8793 2.4792 2.6000 12 3.1297 2.5167 2.6000 13 3.3801 2.5445 2.6000 14 3.6305 2.5697 2.6000 15 3.8809 2.3842 2.6000 16 4.1312 2.5898 2.6000 17 4.3816 2.5995 2.6000 l 18 4.6320 2.5954 2.6000 l 19 4.8824 2.5835 2.6000 20 5.1327 2.5661 2.6000 21 5.3831 2.5365 2.6000 22 5.6335 2.3089 2.6000 23 5.8839 2.4725' 2.6000 24 6.1343 2.5341 2.5956 25 6.3846 2.5276 2.5875 l

26 6.6350 2.5415 2.5794 27 6.8854 2.5520 2.5712 28 7.1358 2.5408 2.5631 29 7.3862 2.3844 2.5550 30 7.6365 2.5455 2.5468 31 7.8869 2.5322 2.5387 32 8.1373 2.5212 2.5305 33 8.3877 2.4915 2.5224 34 8.6380 2.4637 2.5143 35 8.8884 2.3861 2.5061 36 9.1388 2.2809 2.4980 37 9.3892 2.3411 2.4899 38 9.6396 2.2784 2.4817 -

39 9.8899 2.1998 2.4736 40 10.1400 2.1249 2.4654 41* 10.3910 2.03d4 2.4573 42* 10.6410 1.8667 2.4492 43* 10.8910 1.8031 2.4410 44* 11.1420 1.8210 2.4329 l 45* 11.3920 1.4818 2.4248 l 40* 11.7680 0.3495 2.4125 l

Asterisked (*)itenu (top and bottom 15%) are not considered for the surveillance region.

NDIT iiFS-9800082 SEQ. 00 Page 12 of 13 i ,

OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 l

l Figure 6: FQ(Z)*P versus Core Height Cycle Burnup of > 6000 MWD /MTU

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4 NDIT NFS-9800082 SEQ. 00 Page 13 of 13 OPERATING LIMITS REPORT (OLR) for BYRON UNIT 2 CYCLE 8 Table 3

[FQ(z)*Prel] vs. Axial Core Height Cycle Burnup of > 6000 MWD /MTU No. Core Height (feet) Max. FO*P FQ Limit 1* 0.2504 0.5596 2.6000 2* 0.6259 1.8190 2.6000 3* 0.8763 2.2815 2.6000 4* 1.1267 2.4761 2.6000 5* 1.3771 2.5644 2.6000 6* 1.6275 2.5988 2.6000 7 1.8778 2.5958 2.6000 8 2.1282 2.3889 2.6000 9 2.3786 2.4710 2.6000 10 2.6290 2.4443 2.6000 11 2.8793 2.47M 2.6000 I

12 3.1297 2.5090 2.6000 13 3.3801 2.5314 2.6000 14 3.6305 2.5505 2.6000 15 3.8809 2.3615 2.6000 16 4.1312 2.5611 2.6000 17 4.3816 2.5673 2.6000 18 4.6320 2.5661 2.6000 19 4.8824 2.5542 2.6000 20 5.1327 2.5414 2.6000 21 5.3831 2.5148 2.6000 22 5.6335 2.2938 2.6000 ,

23 5.8839 2.4631 2.6000 j 24 6.1343 2.5041 2.5956 I 25 6.3846 2.5062 2.5875 26 6.6350 2.5051 2.5794 27 6.8854 2.4967 2.5712 28 7.1358 2.4916 2.5631 29 7.3862 2.3485 2.5550 30 7.6365 2.5216 2.5468 31 7.8869 2.5192 2.5387 32 8.1373 2.5157 2.5305 33 8.3877 2.4966 2.5224 34 8.6380 2.4734 2.5143 35 8.8884 2.3954 2.5061 36 9.1388 2.3164 2.4980 37 9.3892 2.3975 2.4899 38 9.6396 2.4082 2.4817 39 9.8899 2.4388 2.4736 40 10.1400 2.4654 2.4654 41* 10.3910 2.4381 2.4573 42* 10.6410 2.3340 2.4492 43* 10.8910 2.2882 2.4410 44* 11.1420 2.1840 2.4329 45* 11.3920 1.7573 2.4248 46* 11.7680 0.5792 2.4125 Asterisked (*) items (top and bottom 15%) are not considered for the surveillance region

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