ML20202F618

Cycle 8 COLR in ITS Format & W(Z) Function

ML20202F618
Person / Time
Site:	Byron
Issue date:	12/31/1998
From:	Gurley J, Redden D, Wurz E COMMONWEALTH EDISON CO.
To:
Shared Package
ML20202F598	List: ML20202F591 ML20202F602 ML20202F618
References
NUDOCS 9902040109
Download: ML20202F618 (13)

Text

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J NUCLEAR FUEL MANAGEMENT DEPARTMENT NUCEAR DESIGN INFORMATION TRANSMfTTAL E SAFLTY RELATED Originating Organizarian NDIT Na NFM9800233 O NON-SAFETYRELATED E NuclearFuelManagement Seq. Na 1 O REGULATORY REATED D Other(specify) Page 1 of 13 Station Byron Unit 2 Cycle 8 Generic To: W. G. Kouba, Byron Site Engineering Manager Subject Byron Unit 2 Cvele 8 Core Operating Limits Report in ITS Format and W(z) Punction E. Wurz [W /2 Preparer Preparer's Signature O Date

>~.,

Reviewer CL / -

Re ' wer's Signa ahal9n Date D. Redden l I b NFM Supervum NFM Supervuor's SigiRtufe Date Status of Information: E Verified O Unverified O EngineeringJudgement Method and Schedule of Verification for Unverified NDITs:

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

Purpose of Information: This sequence supercedes Sequence 0. This sequence incorporates station-requested changes. This COLR incorporates the ITS format and W(Z) fuu. tion. Byron Station is requested to perfccm a Plant Review (ITR and PORC) of this document. Upon completion of the Plant Review, Byron Station is to transmit the COLR pcution to the Nuclear Regulatory Commission pursuant to 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.

Source of Information: 1) NDIT NFM9800224, Seq. O. "W(z) curves for Technical Specification Fq surveillance via W(z) methodology for BY1C9 and BY2C8," dated November 9,1998.

2) PND Calculation Number SP-23. "BY2C8 SPIL - Unfavorable exposure Time (UET)." Project BY2C8 SPIL, dated November 30,1997.

3) Letter from M. Lesniak to U. S. Nuclear Regulatory Commission, " Application for Amendment to Facility Operating Licenses-Reactivity Control Systems; Byron Station Units 1 and 2, NPF -37/66: Docket Nos. 50-454/455; Braidwocxl Units 1 and 2 NPF.72n7 Docket Nos. 50456/457 " dated December 21,1995.

Supplemental Distribution: J. Bauer (DG) K. N. Kovar / B. K. Arnholt (BY) B. J. Adams / J. E. Langan fBY)

E. Young (DG) H. S. Kim / T. A. Shackelford (DG) Byron CentralFiles DG Central Files 9902040109 990129

! PDR ADOCK 05000454 (/4 9

P PDR gf

.~ .. . . . . . . - _ - -_ - . . _. - . - . . . _ - . - - . . . -

NDIT NFM9800233

.. Seq.1 Page 2 of13 CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Byron Station Unit 2 Cycle 8 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 1LCO -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)

LCO -3.9.1 Boron Concentration:

The portions of the Technical Requirements Manual affected by this report are listed below:

LTRM 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.j - . Shutdown and Control Rods

~. - . - . - -. , - ..- .- . .-.. ~. . . . . . . . . ~ - . ~ , . _ . .

NDIT NFM9800233 Seq.I l Page 3 of 13 l

CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8

. 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 unless otherwise  ;

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

2.1 Shutdown Marain (SDM) -

j 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% AWk (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). I The SDM limits for MODE 5 are:

2.1.2.1 SDM shall be greater than or equal to 1.0% AWk (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 ano 3.1.j) I

1 2.2 Moderator Temoerature Coefficient (LCO 3.1.3)

- The Moderator Temperature Coefficient (MTC) limits are:

-2.2.1 The BOL/ARO/HZP-MTC shall be less positive than +3.6 x 10 AWk/*F.

2.2.2 The EOUARO/HFP-MTC shall be less negative than -4.1 x 10d Ak/k/'F.

2.2.3 The EOL/ARO/HFP-MTC Surveillance limit at 300 ppm shall be less negative than or equal to -3.2 x 10" AWW'F.

where: BOL stands for Beginning of Cycle Ufe 4

ARO stands for All Rods Out HZP stands for Hot Zero Thermal Power EOL stands for End of Cycle Life HFP stands for Hot Full Thermal Power

NDIT NFM9800233 Seq.1 Page 4 of 13 CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 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) 2.4.1 The control banks shall be limited in physical insertion as shown in Figure 2.4.1.

2.4.2 The control banks shall be operated in sequence by withdrawal of Bank A, Bank 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 with a 113 step overlap.

NDIT NFM9800233 l Seq.1 Page 5 of13 CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8

. Figure 2.4.1:

Control Bank Insertion Limits Versus Percent Rated Thermal Power (29 %, 228) (79 %, 228) 228 220 7 7

/ /

BANK B 180 # #

I 160 ' " (100 %, 161)

(0%,162) l f140 ,

i 6, 12 /

/ l BANK C ' /

/

h I /

%e 80 / /

BANK D

= , / /

,g

' /l(0%, 47) l. j

/

/

(30%, 0) 0 2 0 10 20 30 40 50 60 70 80 90 100 Relative Power (Percent) h.__.:__... . _ _ , . _ . . _ .

' ' ' ~ - - - - - - - - - - -

- o .-

5

'- - NDIT NFM9800233 Seq.1 Page 6 of13

, CORE OPERATING LIMITS REPORT (CoLR) for BYRON UNIT 2 CYCLE 8 I

2.5 Heat Flux Hot Channel Factor (FJZ1) (LCO 3.2.1) f 2.5.1 -

Fq "

Fq(Z)s xK(2)for P s 0.5 O.5 Fq(Z)s Fq

• xK(2) for P > 0.5 P

where P = the ratio of THERMAL POWER to RATED THERMAL POWER F," = 2.60 K(Z) is provided in Figure 2.5.1.

i l

2.5.2_ - W(Z) is provided in Figures 2.5.2.a through 2.5.2.c. <

The normal operation W(Z) values have been determined at burnups of 150, 10000 and 19100 MWD /MTU.

I Table 2.5.2 shows the F*o(z) penalty factors that are greater than 2% per 31 l 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.

Multiplication Factor = 1.02 9

v

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NDIT NFM9800233 Seq.1 Page 7 of 13

, CORE OPERATING LIMITS REPORT (cOLR) for BYRON UNIT 2 CYCLE 8 Figure 15.1: K(Z)- Normalized Fq(Z) as a Function of Core Height .

1.1 (0.0, 1.0) (6.0, 1.0) 4 1'

(12.C ,0.925) 0.9 0.8 FlT 0.7

. Y u.

=

] 0.6 1 1

0.5 8 +LOCA Limiting M 0.4 -

Envelope 0.3 l 0.2-0.1 0

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

4

_ ~. -

NDIT NFMAG233 Seq.1 i

Page 8 of 13 l 1

CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 I licight MAX W(Z)

Feet Byron Unit 2 Cycle 8 l 0.00 - 1.0000 0.20 1.0000  !

Figure 2.5.2.a 0.40 1.0000-0.60 1.0000 Summary of W(Z) Functim at 150 MWD /MTU 0.80 1.0000 (Top and Bottom 15% Excluded per WCAP-10216)

I.00 1.0000 1.20 1.0000 1.40 1.0000 1.60 1.0000 1.25 1.80 1.2006 2.00 l

1.1967 2.20 1.1923 2.40 1.1877 2.60 1.I829

j. 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 o 5.20 1.1191 '

1.16 5.40 1.!!33

• 5.60 1.1076

• 5.80 1.1016

• 6.00 1.0968  :

6.20 1.0969 o 6.40 1.1022 . ,

6.60 1.1060 f e g ese, 6.80 1.1089 e '

7.00

,' y 1.1112 * * '

1.10 7.20 1.1125 '* e 7.40 1.1131

• 7.60 1.1126 "

7.80 1.1111 8.00 1.1085 8.20 1.1050 8 40 1.1011 8.60 1.0969 .

8.80 1.0923 9.00 1.0869 9.20 1.0M4

!.- 9.40 1.0848 I 9.60 1.0848 9.80 1.0839 10.00 1.0809 10.20 1.0791 l 10.40 1.0000 10.60 1.0000 l 10.80 1.(KXW) 1.00 11.00' l.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

• 11.60 1.0000 11.80 1.00(K) 12.00 1.00[X)

I I

l i

l r

1

o NDIT NFM9800233 Seq.1 Page 9 of 13

, CORE OPERATING LIMITS REPORT (coLR) for BYRON UNIT 2 CYCLE 8 Heig'ot . MAX W(Z)

. Feet , Ilyron Unit 2 Cycle 8 0.00 1.0000' O.29 1.0000 Figure 2.5.2.b 0.40 1.0000 0.60 1.0000 - Sununary of W(Z) Functum at 10000 MwT)/MTU l

0.80 1.0000 (Top and Bostcen 15% Excluded per WCAP.10216) l 1.00 1.0000

!.20 1.0000 1 1.40 1.0000 1.60 1.0000

)

1.25 1.80 1.2211 2.00 1.2162 I 2.20 1.2106 2.40 1.2048 2.60 1.1988 2.80 1.1918 4, 3.00 1.1854 .

3.20 - 1.1794 , j 3.40 1.1733 1.20 ,

1 3.60 1.1688 3.80 1.1644

• 4.00 ' l.1601 0 4.20 1.1554 -

4 40 1.149) 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.!!22

• i

! 5.80 ~ 1.1050 e 1 6.00 1.0970 I 6.20 1.0N7

• l 6.40 . 1.1006 e i 6.60 1.lN6 > ...e.,

j 6.80 1.1076 - * '< >

7.00 -

7.20 1.1101 1.11I5 1.10

'. , i

7.40 1.1121 7.60 1.1116 o 7.80 1.1099 I 8.00 1.1072 8.20 ' !.1037 '

8 40 1.0996 8.60 1.0948 8.80 1.0896 '

1.05 9.00 1.0850 --g.

9.20 1.0823 .

9.40 1.0815 9.60 1.0812 9.80 1.0809 l 10.00 1.0818 10.20 1.0M3 30.40 - 1.0000 10.60 'I0000 1.00 10.80 1.(XX)0

!!.00 1.0000 0.00 2.00 4.00 6.00 8.00 10.00 12.00 11.20 1.0000

' CORE HEIGHT (FEET)

I1.40 1.0000 11.60 1.0(XX) 4 I1.80 1.0000 12.00 1.0(KK) 4

i NDIT NFM9800233 Seq.1 Page 10 of 13 CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 Height MAX W(Z)

Feet Byron Unit 2 Cycle 8 0.00 1.0000 0.20 1.0000 Figwe 2.5.2.c 0.40 - 1.0000 0.60 -1.0000 Summary of W(Z)' Function at 19100 MWD /MTU 0.80 1.0000 (Top and Bonom 15% Excluded peWCAP-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 e 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 e

5.20 1.1336 3,35 l' 5.40 1.1281

.5.60 1.1216 o

5.80 1.1150 , ,,

6.00 1.1165 g e [,

6.20 1.1232 g , e

• 6.40 1.1272 6.60 1.1304 *

• l 6.80 1.1325

• 7.00 . 1.1334 '

1.10 7.20 1.1332 l 7.40 1.1318 7.60 1.1292 " '

7.80 "

/

l 1.1253 8.00 1.1202 j 8.20 1.1141 8.40 1.1075 l 8.60 1.1009 l 8.80 1.0946 1.05

l. 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 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

, 11.60 ; 1.0000 11.80 1.0000 12.00 1.0000

. __ . . _. _ . . .. . ~.

.* )

NDIT NFM9800233 l Seq.1 l i

Page 11 of 13 '

CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 1

Table 2.5.2 Fq Margin Decreases in Excess of 2% per 31 EFPD Cycle Burnup Max % Decrease 1 j

(MWD /MTU) in Fu Margiri

, j 150 3.62  ;

313 4.21 I 475 4.41 I 638 4.56 j 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 i compliance with the 3.2.1.2 Surveillance Requirements. '

__. . .. _ .. . ... _ _ . . . =. . . . _ _ . . . . _ _

k:

NDIT NFM9800233 Seq.1 Page 12 of 13

,, , CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 2.6. Nuclear Enthalov Rise Hot Channel Factor (F"y (LCO 3.2.2) t

-2.6.1 Fa" s Fj"((1.0 + PFm(1.0 - P)]  !

where: P = the ratio of THERMAL POWER to RATED THERMAL POWER F"7[ = 1.70 -

-PFm = 0.3 2.7 ~  !

Axial Flux Difference fAFD) (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 I The AFD Acceptable Operation Limits are provided in Figure 2.7.1.

l l

2.8 Boron Concentration (LCO 3.9.1)

~

2.8.1 The refueling boron concentration shall be greater than or equal to 2000 ppm.

1 I

j s

l-

t NDIT NFM9800233 s

Seq.I Page 13 of 13 CORE OPERATING LIMITS REPORT (COLR) for BYRON UNIT 2 CYCLE 8 FIGURE 2.7.1: Axial Flux Difference Limits As A Function of Rated Thermal Power

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r i-11,X) (1  ;, X)

UNACCEPTABLE UNACCEPTABLE ----

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OPERATION OPERATION ----

/ g

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=

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5

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f /

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D (.3< !a (31,50) l ACCEPTABLE OPERATION [

2:

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