ML20195C796

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Rev 2 to NFM9800233, Byron Station Unit 2 COLR for Cycle 8A (BY2C8A)
ML20195C796
Person / Time
Site: Byron Constellation icon.png
Issue date: 04/28/1999
From: Murphy P, Wurz E
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20195C794 List:
References
NFM9800233, NFM9800233-R02, NFM9800233-R2, NUDOCS 9906080312
Download: ML20195C796 (16)
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Text

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Attachment Byron Station Unit 2 Core Operating Limits Report for Cycle 8A (BY2C8A) l l

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9906080312 990525 PDR ADOCK 05000455-P PDR a (p:\99byltrs\990086. doc)

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NUCLEARPUEL MANAGEMENTDEPARTME!G NUCLEAR DESIGN INFORMATION TRANSMITTAL

. E SAFEITRELATED Originating Organization s NDITNa NpM9800233 i O NON4AFETYREIATED E NuclearPuelManagement Seq. Na 2 O REGULATORYRELATED D Other(spedfy) Page 1 of 16 E

Station Byron Unit 2 Cycle _ SA Generic To: W, G. Kouba, Byron Site Engineering Manager Subject Byron Unit 2 Cycle 8A Cwe Operating Limits Report in ITS Format and W(z) Punction

$ E. Wurz /

Uk

. Preparer Preparer's Signature Q Date

'- P. Murphy Reviewn D E. % i fN Reviewer's Signature ( Date Status ofInforrnation: E Verified O Unverified O EngineeringJudgement Method and Schedule of Verification for Unverified NDITs:

  • , Description ofInformation: Attached is the Byron Unit 2 Cycle 8A Core Operating Limits Report (COLR)in the ITS format and W(z) function.

Purpose of Infonnation: 'Ihis sequence supercedes Sequence 1. nis sequence incorporates changes as a result of increasing T. average 581'F to 583*F. %is COLR incorporates the ITS format and W(Z) function. Byron Stanon is requested to perform a Plant Review of this '

document. Upon compledon of the Plant Review, Byron Station is to transmit the COLR pardon to the Nuclear Regulatory Comminion purs .

Technical Specification 5.6.5. Please provide NFM (Erich Wurz) with a copy of Byron Station's completed Plant Review and COLR submittal to the NRC. l' Source ofInformation: 1) NDIT NFM9800224, Seq. O,"W(z) curves for Technical Specification Fq surveillance via W(z) methodology for BY1C9 and BY2CB," dated November 9,1998.

2) PND Calculation Number SP.23, "BY2C8 SPIL- Unfavorable Exposure Tirne (UE'I)," Project BY2C8 SPIL, dated November 30,1997.
3) Letter from M. Lesniak to V. S. Nuclear Regulatory Conunission, " Application for Amendment to Facility Operating '

Licenses-Reacdvity Control Systems; Byron Stanon Uniu 1 and 2, NPF-37/66: Docket Nos. 50 454/455; Braidwood Units 1 and 2 NPF.7247 Docket Nos. 50 456/457," dated December 21,1995.

4) Westinghouse Calculation Note CN.CB08 019," Byron 2 Cy8A COLR W(z) Tavs+2 (14788,16k,19100)," dated April 12,1999.
  • Supplemental Distribution: J. Bauer (DG)

K. N. Kovar /B. K. Arnholt (BY) B. J. Adams / J. E. Langan (BY) *

. E. Young (DG) H.S.Kim/T, A.Shackelford(DG) K. S. Elam (BY)

DG Central Files Byron Central Files

I l

I i NDIT NFM9800233 Seq.2

[ Page 2 of16 CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8A I '

1.0 CORE OPERATING LIMITS REPORT R

This Core Operating Limits Report (COLR) for Byron Station Unit 2 Cycle 8A has been prepared in accordance with the requirements of Technical Specification 5.6.5 (ITS).

The Technical Specifications affected by this report are listed below:

LCO 3.1.1 Shutdown Margin (SDM)

LCO 3.1.3 Moderator Temperature Coefficient

~

LCO 3.1.4 Rod Group Alignment Limits LCO 3.1.5 Shutdown Bank Insertion Limits LCO 3.1.6 Control Bank Insertion Limits LCO 3.1.8 Physics Tests Exceptions- Mode 2 LCO 3.2.1 Heat Flux Hot Channel Factor (Fo(Z))

LCO 3.2.2 Nuclear Enthalpy Rise Hot Channel Factor (F%)

LCO 3.2.3 Axial Flux Difference (AFD)

LCO 3.3.9 Boron Dilution Protection System (BDPS)

L .

LCO 3.9.1 Boron Concentration The portions of the Technical Requirements Manual affected by this report are listed below:

TRM TLCO 3.1.b Boration Flow Paths- Operating TRM TLCO 3.1.d Charging Pumps- Operating TRM TLCO 3.1.f Borated Water Sources- Operating TRM TLCO 3.1.h Shutdown Margin (SDM)- MODE 1 and MODE 2 with keff 21.0 TRM TLCO 3.1.1 Shutdown Margin (SDM)- MODE 5

~

TRM TLCO 3.1.] Shutdown and Control Rods

NDIT NFM9800233 Seq.2
Page 3 of16 CORE OPERATINO LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8A j 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 are applicable for the entire cycle unlest otherwise

identified. These limits have been developed using the NRC-approved methodologies specified in Technical Specification 5.6.5.

2.1 Shutdown Marain (SDM)

The SDM limit for MODES 1,2,3, and 4 is:

2.1.1 The SDM shall be greater than or equal to 1.3% Ak/k (LCOs 3.1.1,3.1.4,3.1.5, 3.1.6, 3.1.8, and 3.3.9; TRM TLCOs 3.1.b, 3.1.d, 3.1.f, 3.1.h, and 3.1.J).

., The SDM limits for MODE 5 are:

2.1.2.1 SDM shall be greater than or equal to 1.0% Ak/k (LCO 3.1.1)

' 2.1.2.2 SDM shall be greater than or equal to 1.3% Ak/k (LCO 3.3.9; TRM TLCO 3.1.1 and 3.1.j) 2.2 Moderator Temnerature Coefficient (LCO 3.1.3)

The Moderator Temperature Coefficient (MTC) limits are:

2.2,1 The BOUARO/HZP-MTC shall be less positive than +3.6 x 10 Ak/k/*F.

I 2.2.2 The EOUARO/HFP-MTC shall be less negative than -4.1 x 10" Ak/k/*F.

  • 2.2.3 The EOUARO/HFP-MTC4 Surveillance limit at 300 ppm shall 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 Therrnal Power EOL stands for End of Cycle Life HFP stands for Hot Full Thermal Power

NDIT NFM9800233 Seq.2

Page 4 of16 CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8A i*

2.3 Shutdown Bank Insertion Limit (LCO 3.1.5) 2.3.1 All shutdown banks shall be withdrawn to at least 228 steps.

2.4 Control Bank Insertion Limits (LCO 3.1.6) 1 2.4.1 The control banks shall be limited in physical insertion as shown in Figure 2.4.1. j 2.4.2 The control banks shall be operated in sequence by withdrawal of Bank A, Bank I B, Bank C and Bank D. The control banks shall be sequenced in reverse order upon insertion.

2.4.3 The control banks shall be operated witn a 113 step overlap.

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NDIT NFM9800233 Seq.2 j #

Page 5 of16 COP 2 OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8A t.

Figure 2.4.1:

, Control Bank Insertion Limits Versus Percent Rated Thermal Power (29 %, 228) (79 %, 228) 0 f f

/ /

2M

~

  • ANK B 180 # #

w c

160 ' " (100 %, 161)

(0%,162) l

.c g140 <

E g 12

/ l BANK C l /

e r- -

/ -

/

r joo / / -

BANK D E eo / /

' /l(0%,47) l j

/

/

0 0 10 20

( .,

f 30

/ 40 50 60 70 80 90 100 Relative Power (Percent)

NDIT NFM9800233

. Seq. 2 Page 6 of16 CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8A j '2.5 Heat Flux Hot Channel Factor (F9(Z)) (LCO 3.2.1) l 2.5.1 RTP 3 Fq Fq(Z)s xK(Z)for P 50.5 0.5 RTP p

Fq(Z)s xK(Z) for P > 0.5 P

where: P = the ratio of THERMAL POWER to RATED THERMAL POWER 1

F," = 2.60 '

K(Z) is provided in Figure 2.5.1.

I

_2.5.2 W(Z) is provided in Figures 2.5.2.a through 2.5.2.f.

The normal operation W(Z) values for Cycle 8 (T-Average = 581*F) have been determined at burnups of 150,10000 and 19100 MWD /MTU. (Figures 2.5.2.a, 2.5.2.b, and 2.5.2.c)

Table 2.5.2 shows the' F o(z) penalty factors valid for Cycle 8 (T-Average =

581*F) that are greater than 2% per 31 Effective Full Power Days. These values shall be used to increase the F*a(z) as per Surveillance Requirement 3.2.1.2. A 2% penalty factor shall be used at all cycle bumups that are outside the range of Table 2.5.2. j Multiplication Factor = 1.02

The normal operation W(Z) values for Cycle 8A (T-Average = 583*F) have been determined at burnups of 14788,16000, and 19100 MWD /MTU. (Figures 2.5.2.d,2.5.2.e, and 2.5.2.f)

A 2% penalty factor shall be used at all burnups for Cycle 8A.

Multiplication Factor = 1.02 i

The Cycle 8A W(Z) functions are to be used at the time of the T-Average

{

increase implementation. Either set of W(Z) functions (Cycle 8 or Cycle 8A) j may be extrapolated beyond the given burnup range. l

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j. NDIT NFM9800233 Seq.2 j '

Page 7 of16 .

}

CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8A I i

Figure 2.5.1: K(Z)- Normalized Fq(Z) as a Function of Core

Height 1.1 (0.0, 1.0) (6.0, 1.0) 1

, (12.C .0.925) 0.9 0.8 g0.7 u.

]0.6

=

E j 0.5 8 +LOCA Limiting

.- M 0.4 Envelope .

0.3 0.2 0.1 0

0 1 2 3 4 5 6 7 8 9 10 11 12 BOTTOM Core Height (ft) TOP l

4 NDIT NFM9800233

" Seq.2

[ Page 8 of16 CORE OPERATING LIMITS REPORT (CoLR) for BYRON UNIT 2 CYCLE 8A Height MAX W(Z)

  • Feet Byron Unit 2 Cycle 8 I 0.00 1.0000 0.20 1.0000 Figure 2.5.2.a 0.40 1.0000 0.60 1.0000 Sammary of W(Z) Function at 150 MWD /MTU

, 0.80 1.0000 (Top and Bottom 15% Excluded per WCAP-10216)

. 1.00 1.0000 1.20 1.0000 1.40 1.0000 1.60 1.0000 1.25 1.80 1.2006 2.00 1.1967 2.20 1.1923 2.40 1.1877

, 2.60 1.1829

, 2.80 1.1779 3.00 1.1723 3.20 1.1661 3.40 1.1606 1.20 3 60 1.1567

3.80 1.1541

,' 4.00 1.1515 ,

4.20 1.1478 .

4.40 1.1425 o 4.60 1.1361 ,

4.80 1,1299 .

5.00 1.1245

  • 5.20 1.1191 j,j $

5.40 1.1133

  • 5.60 1.1076 N
  • 5.80 1.1016
  • 6.00 1.0968
  • N 6.20 1.0969 "

CT

,. 6.40 1.1022 go -

6.60 1.1060
  • N o ****
  • 6.80 1.1089 e ,' d 7.00 1,1112 * * '

1.10 l 7.20 1.1125 <+ * '

7.40 1.1131

  • l 7.60 1.1126 "

7.80 1.1111 '

8.00 1.1085 8.20 1.1050 l

8.40 1.1011 8.60 1.0969 8.80 1.0923 9.00 1.05 1.0869 9.20 1.0844 9.40 1.0848 9 60 1.0848 9.80 1.0839 10.00 1.0809 10.20 1.0791 10.40 1.0000 10.60 1.0000 10.80 1.0000 - 1.00

, 33,00 3,0000 0.00 2.00 4.00 6.00 8.00 10.00 12.00 11.20 1.0000 CORE HElGHT(FEET) 11.40 1.0000 11.60 1.0000 11.80 1.0000 12.00 1.0000

t NDIT NFM9800233

Seq. 2

Page 9 of16

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CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8A Ileight MAX W(Z) t*

Feet 0.00 -

Byron Unit 2 Cycle 8 1.0000

, 0.20 1.0000 Figure 2.5.2.b 0.40 1.0000 0.60 1.0000 Sunmary of W(Z) Functmo at 10000 MWDM11l

. 0.80 1.0000  !

  • (rep and Bottom 15% Excluded per WCAP-10216) j 1.00 1.0000 1.20 1.0000 1.40 1.0000 1.60 1.0000 1.25 1.80 1.2211 2.00 12162 2.20 '.2106 2.40 1.2048

, 2.60 1.1988

, 2.80 1.1918 3.00 1.1854

  • 3.20 1.1794 ,

3.40 1.1733 1.20 ,

.-- 3.60 1.1688 1 3.80 1.1644

  • l

, 4.00 1.1601

4.20 1.1554 -

4.40 1.1491 e 4.60 1.1416 '

4.80 1.1347 5.00 1.1293 ,

5.20 1.1244 1.15 ,

5.40 1.1187 5.60 1.1122 2

  • 5.80 1.1050 +

6.00 1.0970 g 6.20 1.0947 g

  • 6 40 1.1006 e

[ 6.60 1.1a86 o .

e e,

  • 6.80 1.1076
  • 3 7.00 1.1101 '

1.10 ,

7.20 1.1115 '

', o 7.40- 1.1121 7.60 1.1116 7.80 1.1099 **'

8.00 1.1072 8.20 1.1037 8.40 1.0996 8.60 1.0948 8.80 1.0896 gg 9.00 1.0850 k20 1.0823 9.40 1.0815 9.60 1.0812 ---

9.80 1.0809 10.00 1.0818 j

10.20 1.0843 lado 1.0000 la60 1.0000 1.00 10.80 1.0000 11.00 1.0000 0.00 2.00 4.00 6.00 8.00 10.00 12.00 11.20 1.0000 CORE HEIGHT (FEET) 11.40 1.0000 1't.60 1.0000 I

11.80 1.0000 12.00 1.0000 l j

NDIT NFM9800233

' Seq.2

[ Page 10 of16 CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8A 11eight MAX W(Z)

  • Feet Byron Unit 2 Cycle 8 I 0.00 1.0000

, 0.20 1.0000 Figure 2.5.2.c

0.40 1.0000 0.60 1.0000 Summary d W(Z) Function at 19100 MWD /MTU 0.80 1.0000 (Top and Batom 15% Excluded per WCAP 10216) 1.00 1.0000 1.20 1.0000 1.40 1.0000 1.60 1.0000 1.25 1.80 1.2263 2.00 1.2212 2.20 1.2154 2.40 1.2092 2.60 1.2025 2.80 1.1948 3.00 1.1864 3.20 1.1763

,, 3.40 1.1673

  • 1.20 3.60 1.1651
  • 3.80 1.1637 4.00 "

1.1618 4.20 1.1590

+

  • 4.40 1.1545 4.60 1.1487 e 4 80 1.1432 < -

5.00  !

1.1384 5.20 1.1336 1.15 ,

5.40 1.1281 4

5.60 1.1216 g ---- -

o 5 80 1.1150 p 6.00 1.1165 e ,,o.,

@ 4 .

g 6.20 1.1232 +

6.40 6.60 1.1272 g g, 1.1304 g 6.80 1.1325

  • 7.00 1.1334 3,3 o
  • 7.20 1.1332 e

7.40 1.1318 7.60 1.1292 "

e#'

7.80 1.1253 8.00 1.1202 8.20 1.1141 8.40 1.1075 8.60 1.1009 8.80 1.0946 1.05 9.00 1.0873 9.20 1.0817 9.40 1.0815 9.60 1.0842 9.80 1.0864 10.00 1.0872 10.20 1.0878 10.40 1.0000 10.60 1.0000 1.00 0.00 2.00 4.00 6.00 8.00 10.00 12.00 11.20 1.0000 CORE HEIGHT (FEET) 11.40 1.0000 11.60 1.0000 11.80 1.0000 12.00 1.0000

4 NDIT NFM9800233 Seq. 2

Page 11 of16 CORE OPERATING LIMITS REPORT (cot.n) for BYRON UNIT 2 CYCLE 8A

$ Table 2.5.2

Fq Margin Decreases in Excess of 2% per 31 EFPD
Cycle Burnup

, Max % Decrease (MWD /MTU) in Fq Margin 150 3.62 313 4.21 475 4.41 638 4.56 801 4.63 963 4.57 1126 4.40 1289 4.12 1451 3.75 1614 3.26 1777 2.74 1939 2.21 2102 2.00 Note: All cycle burnups outside the range of the table shall use a 2% decrease in Fq margin for compliance with the 3.2.1.2 Surveillance Requirements.

r, - .

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NDIT NFM9800233

" Seq.2 Page 12 of16 CORE OPERATING LIMITS REPORT (cOLR) for BYRON UNIT 2 CYCLE 8A Figure 2.5.2.d:

t' Summary of W(z) Function at 14788 MWD /MTU (Top and Bottom 15% Excluded per WCAP-10216)

Valid far T. Average Increased to $83'F Meladet Max.

(feet) Wz)

~a

.0000 1.0000

.2000 1.0000 1.25 4000 1.0000

.G000 1.0000

.8000 1.0000 1.0000 1.0000 1.2000 1.0000 1.4000 1.0000 a 1.6000 1.0000 "a 1.8000 1.2224 i

  • 2.0000 1.2133 '

2.2000 1.2154 2.4000 1.21D7 1.20 2.6000 1.2054 a 2.8000 1.1994 3.0000 1.1327 '

3.2000 1.1858 3.4000 1.1802 3.6000 1.1769

-'A 'I 3.8000 1.1756 '4 4.0000 1.1744 ^^^

4.2000 1.1726 gg a A" o 4.4000 1.1703 o 1'15 ' ' '

4.6000 1.1875 M s A

a 4.0000 1.1544 M &

5.0000 1.1810 V An "

5.2000 1.1569 a 5.4000 1.1520  %

5.6000 1.1461

  • o Hda'a i 5.8000 1.1381 -  !

6.0000 1.1367 N 6.2000 1.1422 w 6.4000 1.1482 lE 6.6000 1.1531 1.10 6.8000 1.1570

  • 7.0000 1.1597 7.2000 1.1813 7.4000 1.1S17 7.6000 1.1S08

, 7.8000 1.1583 8.0000 1.1560 8.2000 1.1519 8.4000 1.1463 8.6000 1.1397 8.8000 1.1335 1.05 S.0000 1.1282 S.2000 1.1252 9.4000 1.1251 S.6000 1.1254 S.8000 1.1261 10.0000 1.1274 10.2000 1.1289 18.4000 1.0000 10.6000 1.0000 lo.8000 1 0000 1 00 11.0000 1.0000 11.2000 1.0000 0 2 4 6 8 10 12 11.4000 1.0000 11.6000 1.0000 BOTTON TOP 11.8000 1.0000 CORE BEICHT (PEET) 12.0000 1.0000

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. Page 13 of16 CORE OPERATING LIMITS REPORT (OOLR) for BYRON UNIT 2 CYCLE 8A Figure 2.5.2.e

t* Summary of M (z) Function at 16000 MWD /MTU i

(Top and Bottom 15% Excluded as per WCAP-10216)

Valid for T-Average Increased to 583*F i

. Meight Max.

(feet) V(3)

.0000 1.0000

.2000 1.0000 1.25

.4000 1.0000

.5000 1.0000

.8000 1.0000 1.0000 1.0000 1.2000 1.0000 A 1.4000 1.0000 "

1.6000 1.0000 '

1.8000 1.2261 '

. 2.0000 1.2228 6 2.2000 1.2186 a 2.4000 1.2136 1.20 2.6000 1.2080 "

2.8000 1.2017 6 3.0000 1.1947 3,2000 1.1871 1 3.4000 1.1805 6' 3.8000 1.1779 "a' ,.

3.8000 1.1769 A 4.0000 1.1758 -

" ^ "44'A 4.2006 1.1741 g 3 6 "

4.4000 1.1713 o '

4.8000 1.1893 m 1*15 '

a a 4.8000 1.1863 P, . , ,

5.0000 1.1630 v - ' -

5.2000 1.1591 A 5.4000 1.1542 l g

~

o ao 5.8000 1.1405 '8g 5.8000 1.1408 m

" ' S.0000 1.1406
  • N
  • 6.2000 1.1471 w S.4000 1.1528 E 6.S000 1.1574 1. 13 S.0000 1.1819 7.0000 1.1635 7.2000 1.1847 7.4000 1.1S47 7.6000 1.1834 7.8000 1.1812 8.0000 1.1578 l 8.2000 1.1533 8.4000 1.1474 8.6000 1.1405 8.8000 1.1342 1. 85 s.0000 1.1283 9.2000 1.1250 S.4000 1.1247 S.8000 1.1280 9.8000 1.1275 18.0000 1.1292 10.2000 1.1307 10.4000 1.0000 10.8000 1.0000 10,8000 1.0000 11.8000 1.0000 1' 00 11.2000 1.0000 0 2 4 6 8 10 12 11.4000 1.0000 11.6000 1.0000 BOTTOM TOP 11.8000 1.0000 CORE BEICHT (FEET) 12.9000 1.0000 k.

)

6 NDIT NFM9800233 Seq.2

[ Page 14 of16

. a. ..

CORE OPERATING LIMITS REPORT (COL.R) for BYRON UNIT 2 CYCLE 8A Figure 2.5.2.f:

I* Summary of W(z) Function at 19100 MWD /MTU (Top and Bottom 15% Excluded as per WCAP.10216)

Valid for T-Average Increased to 583'F t Max.

3 ne (fee@t) w(z)

. .0000 1.0000

.2000 1.0000 1.25 '

.4000 1.0000

.6000 1.0000 )

.0000 1.0000 & I 1.0000 1.0000 "

1.2000 1.0000 a {

3 1.4000 1.0000 * '

1.6000 1.0000 '

1.8000 1.2356 2.0000 1.2318 a 2.2000 1.2268 {

. 2.4000 1.2212 1.20 o 4 2.6000 1.2147 2.8000 1.2074 l-

- 3.0000 1.1998 ^

3.2000 1.1301  % 6d 3.4000 1.1812 3.6000 1.1804 a^ A"'d i 3.8000 1.1802

  • A "6 a

~ 4.0000 1.1732 '

4.2000 1.1780 g \ A 4.4000 1.1762 o L15 '

4.6000 1.1739 M

{

4.8000 1.1713 h V

a 5.0000 1.1683 5.2000 1.1846 '

l 5.4000 1.1801 5.6000 1.1545

  • a. s'n )

aa 5.8000 1.1476 n 6.0000 1.1507 N 6.2000 1.1597 w L 6.4000 1.1644 5

  • 6.6000 1.1885 1. 10 6.8000 1.1714 7.0000 1.1731 7.2000 1.1734 7.4000 1.1724 7.6000 1.1701 7.0000 1.1860 8.0000 1.1825 8.2000 1.1570 8.4000 1.1502 ,

8.6000 1.1426 I 8.8000 1.1358 1.05 i S.0000 1.1288 1 S.2000 1.1244 S.4000 1.1237 9.6000 1.1276 l S.8000 1.1313 1D.0000 1.1336 10.2000 1.1353-10.4000 1,0000 10.6000 1.0000 10,8000 1.0000 e 11.0000 1.0000 1 00 11.2000 1.0000 0 2 4 6 8 10 12 11.4000 1.0000 11.6000 1.0000 BOTTE TOP 4 11.8000 1.0000 CORE BEIQBT (FEET) 12.0000 1.0000

p 1

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! 4 NDIT NFM9800233 Seq.2 l's Page 15 of16 r- *. w . j CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8A l j L{ 2.6 ' Nuclear Enthalov Rise Hot Channel Factor (Fini (LCO 3.2.2) l 2.6.1 Ffn s; F24"[1.0 + PFas(1.0 - P)] ,

';- where: P = the ' ratio of THERMAL POWER to RATED THERMAL POWER L

Fl4" = 1.70 PFas = 0.3 ~ I 1

2.7 - Axial Flux Difference (AFD) (LCO 3.2.3)

, 2.7.1 The AXIAL FLUX DIFFERENCE (AFD) target band is +3, -12% of the target flux

. difference.

2.7.2 The AFD Acceptable Operation Limits are provided in Figure 2.7.1.

2.8 Boron Concentration (LCO 3.9.1) 2.8.1 The refueling boron concentration shall be greater than or equal to 2000 ppm.

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NDIT NFM9800233 Seq.2

( Page 16 of 16 CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8A

, FIGURE 2.7.1: Axial Flux Difference Limits As A Function of Rated Thermal Power i

rm.r lc:

M1, X) (1 1, X)

UNACCEPTABLE UNACCEPTABLE ----

OPERATION OPERA 110N ----

g

/

/ .

~m '

\

/ \

l / .. \

$" / ' iiQ \

/ \

I / .

, \

.4 / \

3 / \

  • E / \

O (.3 !,o' (31,50) et j ACCEPTABLE OPERATION j 0)

,' 50 -40 -30 20 -10 0 10 20 30 40 50 Flux Difference %

l

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