NL-08-1651, Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev 0

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Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev 0
ML083080058
Person / Time
Site: Vogtle Southern Nuclear icon.png
Issue date: 10/31/2008
From: Ajluni M
Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-08-1651
Download: ML083080058 (29)
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Text

Southern Nuclear Operating Company,lnc.

40 Inverness Center Parkway Post Offi.ce Box 1295 Birmingham, Alabama 35201-1295 Tel 205.9925000 SOUIHERNA COMPANY

. Energy to Serve Your World'"

October 31, 2008 Docket No.: 50-425 NL-08-1651 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Unit 2 Cycle 14 Core Operating Limits Report, Rev. 1 Ladies and Gentlemen:

Pursuant to the reporting requirements of Vogtle Electric Generating Plant (VEGP) Technical Specification 5.6.5 Southern Nuclear Operating Company (SNC) is submitting Revision 0 of the Unit 2 Cycle 14 Core Operating Limits Report (COLR) (Enclosure 1), a supplement to Revision 0 of the Unit 2 Cycle 14 COLR (Enclosure 2), and Revision 1 of the Unit 2 Cycle 14 COLR (Enclosure 3).

Revision 0 of the VEGP Unit 2 Cycle 14 COLR was generated prior to the identification and discharge of a leaker fuel assembly and other fuel assemblies necessary to support the change in core design. The supplement to Revision 0 of the VEGP Unit 2 Cycle 14 COLR was generated for the original core configuration and issued to provide an interim COLR boron concentration requirement supporting Cycle 14 redesign for Modes 6 and 5. The supplement to Revision 0 was superseded when Westinghouse issued Revision 1 of the Unit 2 Cycle 14 COLR on October 10, 2008 to SNC.

This letter contains no NRC commitments. If you have any questions, please advise.

Sincerely, M. J. Ajluni Manager, Nuclear Licensing MJAlDRG/daj

U. S. Nuclear Regulatory Commission NL-08-1651 Page 2

Enclosures:

1. Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0
2. Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0
3. Unit 2 Cycle 14 Core Operating Limits Report, Rev. 1 cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. T. E. Tynan, Vice President - Vogtle Mr. D. H. Jones, Vice President - Engineering RType: CVC7000 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. R. E. Martin, NRR Project Manager - Vogtle Mr. G. J. McCoy, Senior Resident Inspector - Vogtle

Vogtle Electric Generating Plant Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Unit 2 Cycle 14 Core Operating Limits Report, Rev. 1 Enclosure 1 Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP Unit 2 Cycle 14 has been prepared in accordance with the requirements of Technical Specification 5.6.5.

The Technical Requirement affected by this report is listed below:

13.1.1 SHUTDOWN MARGIN - MODES I and 2 The Technical Specifications affected by this report are listed below:

3.1.1 SHUTDOWN MARGIN - MODES 3,4 and 5 3.1.3 Moderator Temperature Coefficient 3.1.5 Shutdown Bank Insertion Limits 3.1.6 Control Bank Insertion Limits 3.2.1 Heat Flux Hot Channel Factor - FQ(Z) 3.2.2 Nuclear Enthalpy Rise Hot Channel Factor - FNAH 3.2.3 Axial Flux Difference 3.9.1 Boron Concentration Page 1 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 2.0 OPERATING LIMITS The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the follow ing subsections. These limits have been developed using NRC-approved methodologies including those specified in Technical Specification 5.6.5.

2.1 SHUTDOWN MARGIN* MODES I and 2 (Technical Requirement 13.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.30 percent Mu'k.

2.2 SHUTDOWN MARGIN - MODES 3.4 and 5 (Specification 3.1.1) 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures 1 and 2.

2.3 Moderator Temperature Coefficient (Specification 3.1.3) 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOUARO/HZP-MTC shall be less positive than +0.7 x 10~ Ak/kIoF for power levels up to 70% RTP with a linear ramp to 0 ~oF at 100% RIP.

The EOUARO/RTP-MTC shall be less negative than -5.50 x 1O~ AkJkIOF. 1 2.3.2 The MTC Surveillance limits are:

The 300 ppmlARO/RIP-MTC should be less negative than or equal to

-4.75 x 10~ Mu'kl"F. 1 The 60 ppmlARO/RTP.MTC should be less negative than -5.35 x 10-411k1kf'F. 1 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 I Applicable for full-power T-average of 584.4 to 587.4°F.

Page 1 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 2.4 Shutdown Bank Insertion Limits (Specification 3.1.5) 2.4.1 The shutdown banks shall be withdrawn to a position greater than or equal to 225 steps.

2.5 Control Bank Insertion Limits (Specification 3.1.6) 2.5.1 The control rod banks shall be limited in physical insertion as shown in Figure 3.

2.6 Heat Flux Hot Crumpel Factor - FQ(Z) (Specification 3.2.1)

F RTP 2.6.1 FQ(Z) ~ -7. K(Z) for P > 0.5 F RTP F Q(Z):S: g.5 . K(Z) for P S 0.5 THERMAL POWER where:

P = RATED THERMAL POWER 2.6.2 Fl TP = 2.50 2.6.3 K(Z) is provided in Figure 4.

F RTP. ~(Z) 2.6.4 FQ(Z)~ ~. W(Z) forP> 0.5 TP F/ *K(Z)

F Q(Z):s: 0.5. W(Z) for P S 0.5 2.6.5 W(Z) values are provided in Table 2.

2.6.6 The FQ(Z) penalty factors are provided in Table I.

Page 3 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 2.7 Nuclear enthalpy Rise Hot Channel Factor - F Nl>H (Specification 3.2.2) 2.7.1 THERMAL POWER where:

P = RATED TIlERMAL POWER 2.7.2 F RTP = 1.5 6

!ill 2.7.3 PFM/ = 0.3 2.8 Axial Flux Difference (Specification 3.2.3) 2.8.1 The Axial Flux Difference (AFD) Acceptable Operation Limits are provided in Figure 5.

2.9 BOTOn Concentration (Specification 3.9.1) 2.9.1 The boron concentration shall be greater than or equal to 1830 ppm,'

7his concentration bounds the condition ofkerrS 0.95 (all rods in less the most reactive rod) and subcriticality (111 rods out) over the entire cycle. This concentration includes additional boron to address uncertainties and B 10 depletion.

Page 4 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 Table I FQ(Z) PENALTY FACTOR Cycle FO(Z)

Bumup Penalty (MWD/MTU) Factor All Bumups 1.020 Notes:

1. The Penalty Factor, to be applied to FO(Z) in accordance with SR 3.2.1.2, is the maximum factor by which FQ(Z) is expected to increase over a 39 EFPD interval (surveillance interval of 31 EFPD plus the maximum allowable extension not to exceed 25% of the surveillance interval per SR 3.0.2) start ing from the bumup at which the FQ(Z) was detennined.

Page 5 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 Table 2 RAOCW(Z)

Axial Elevation 150 4000 12000 20000 Point (feet) MWDIMTU MWDIMTIJ MWDIMTU MWDIMTU

  • 1 12.00 1.0000 1.0000 1.0000 1.0000
    • 2 11.80 11.60 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 3
  • 4 11.40 1.0000 1.0000 1.0000 1.0000
  • 5 11.20 1.0000 1.0000 1.0000 1.0000 6 11.00 1.4212 1.4032 1.2390 1.2513 7 10.80 \.3966 1.3909 1.2330 1.2436 8 10.60 \.3698 1.3747 1.2297 \.2324 9 10.40 \.3450 1.3566 1.2266 1.2206 10 10.20 \.3169 \.3418 1.2225 \.2106 II 10.00 1.2872 \.3384 1.2267 1.2144 12 9.80 1.2569 \.3312 1.2311 1.2181 13 9.60 1.2284 \.3186 \.2336 \.2184 14 9.40 1.2101 1.3035 \.2339 \.2177 15 9.20 1.2047 \.2835 \.2293 \.2157 16 9.00 1.2084 1.2637 1.2259 \.2156 17 8.80 1.2124 1.2503 1.2194 1.2133 18 8.60 1.2139 1.2454 1.2184 \.2129 19 8.40 1.2140 1.2440 1.2251 1.2217 20 8.20 1.2138 1.2398 \.2281 1.2386 21 8.00 1.2180 1.2388 1.2345 1.2527 22 7.80 1.2212 1.2364 1.2395 1.2634 23 7.60 \.2208 1.2305 1.2409 \.2715 24 7.40 1.2182 \.2226 1.2398 1.2767 25 7.20 1.2132 1.2125 1.2362 1.2792 26 7.00 1.2062 1.2006 1.2302 1.2791 27 6.80 1.1973 1.1869 1.2221 1.2760 28 6.60 1.1873 1.1724 1.2120 \.2718 29 6.40 1.1770 1.1585 1.2008 1.2678 30 6.20 1.1661 1.1464 \.1895 1.2625 31 6.00 \.1543 1.1357 \.1757 \.2562 32 5.80 \.1451 1.1269 1.1664 1.2468 33 5.60 1.1389 1.1207 1.1667 1.2416 34 5.40 1.1369 \.1197 \.1733 1.2424 35 5.20 1.1437 1.1254 1.1777 \.2445 36 5.00 1.1503 1.1309 \.1820 1.2444 37 4.80 1.1555 1.1353 1.1864 \.2422 38 4.60 1.1602 1.1392 1.1896 \.2377 39 4.40 1.1640 1.1423 \.1915 \.2311 40 4.20 1.1668 1.1446 1.1920 \.2222 41 4.00 1.1687 1.1465 \.1911 1.2110 42 3.80 1.1694 1.1494 \.1889 \.1995 43 3.60 1.1699 1.1526 1.1855 \.1898 44 3.40 1.1720 1.1546 1.1811 1.1812 45 3.20 \.1750 1.1572 \.1764 1.1718 46 3.00 1.1771 1.1612 1.1803 \.1765 47 2.80 \.1881 \.1751 \.1877 \.1897 48 2.60 1.2080 1.1977 \.1931 \.2023 49 2.40 1.2259 1.2187 \.1987 \.2145 50 2.20 1.2439 1.2399 1.2051 \.2264 51 2.00 1.2619 1.2610 1.2120 \.2383 52 1.80 1.2794 \.2816 1.2200 \.2501 53 1.60 \.2966 1.3017 \.2295 1.2621 54 1.40 1.3132 1.3207 1.2388 1.2742 55 1.20 \.3291 \.3386 1.2481 1.2863 56 1.00 \.3435 \.3544 1.2568 \.2977
  • 57 0.80 1.0000 Loooo 1.0000 1.0000
  • 58 0.60 \.0000 \.0000 \.0000 1.0000
    • 59 60 0.40 0.20 1.0000

\.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000

  • 61 0.00 1.0000 1.0000 1.0000 1.0000
  • Top IJId Bonom S Points J;xcludcd per Technical Specification 83.2.1.

These W(Z) values are consistent with Figure 5, and are valid over the HFP Tavs temperature range from 584.4 to 587.4°F.

Page 6 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 FIGURE I REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (FOUR LOOPS FILLED AND VENTED AND AT LEAST ONE REACTOR COOLANT PUMP RUNNING)

5. 0 4.0 ACCEPTABLE OPERATING REGION
w

...... (2 00, .1 P) oW ./

~ 3.0 V

..... ,,/

,,/

V V RE JUIRED SHUTDOWN MARGIN (1 00, .2 ~)

,,/

V""

./

V V

/

/

V IUNACCEPTABLE OPERATING REGION I

( 5~, .:3 0) 1.0 I

0.0 o 500 1000 1500 2000 2500 RCS BORON CONCBNTRATION (ppm)

Page 7 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 FIGURE 2 REQUIRED SHUmOWN MARGIN FOR MODES 4 AND S (MODE 4 WHEN FIGURE 1 NOT APPLICABLE) 5.0

/'

~

(2 00 ~ .9 V

V 4.0

.. V IACCEPTABLE OPERATING REGION I VV

./

V M

VV

~ 3.0

./

V if IREQUIRED SHUTDOWN MARGIN VV (1 50 , . .8 ~)

V V

V V

V 1.0 V UNACCEPTABLE OPERATING REGION

( .6C , * (l 0)

I I

0.0 o 500 1000 1500 2000 2500 RCS BORON CONCENTRATION (ppm)

Page 8 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 FIGURE 3 ROD BANK INSERTION LIMITS VERSUS % OF RATED THERMAL POWER (Fully Withdrawn*)

V I( '0111 1.1 220 If' 200

! ~80 BANK B

~ If'

~ ~60 a: "

ID IJo

l ~40 CQ BANK C

~ 120  ;-

H H

CQ If' "  ;-

1.1 g 100 a 80 8Ill:

BANK D

'/ '/

60 1.1 '/

~161J 40 20 I( .I:il '/

o .I 0 ~O 20 30 40 SO 60 70 80 90 1 o POWER (% of Rated Thermal Power)

  • Fully withdrawn shall be the condition where control rods are at a position within the interval ~225 and ~ 231 steps withdrawn.

NOTE: The Rod Bank Insertion Limits are based on the control bank withdrawal sequence A, B. C, D and a control bank tip-to-tip distance of 115 steps.

Page 9 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 FIGURE 4 K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT 1.4 1.2 FQ =0 2.50 CORE HT. K(Z) 0.00 1. 00 6.00 1. 00 12.0 .925 I

N 0.4 0.2 0.0 o 2 4 6 8 10 12 CORB HEIGHT (feet)

Page 10 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 FIGURE 5 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF % OF RATED THERMAL POWER FORRAOC 12,0 110

(-15, 100) (+10, 100) 100 I 1\

- ~ U ~AC ~EP :ABE

/ \ UN CC PT~ ~LE i 90

/ \

~

i 80

/

\

\

Jfot 70

/ AI-oCE TAl LE

\

'tS GI

.IJ

~ 60

/ \

/ \

1/

I (-30, SO) I (+26, SO) 30 20 10 o

-SO -40 -30 -20 -10 0 10 20 30 40 50 AXIAL FLUX DIFPBRBNCB (percent 61)

Page 11 oUI

Vogtle Electric Generating Plant Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Unit 2 Cycle 14 Core Operating Limits Report, Rev. 1 Enclosure 2 Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0

Intracompany Correspondence

... ~ ..

SOUTIiERN****** . .*.

              • CO.PANY DATE: October 8, 2008 TO: N. J. Stringfellow CAV-NF-1590 KC-2140 FROM: R. ~.Joyce ~ NC-2714 RE: VOGRE ELECTRIC GENERATING PLANT - UNIT 2 CYCLE 14 INTERIMCOLR BORON CONCENTRATION REQUIREMENT Attached are the pages of the. original (pre-redesign) Vogtle 2 Cycle 14 Core Operating Limits Report Rev. 0and Nuclear Design Report Revision 0that remain bounding for Modes 6and 5of the Cycle 14 redesign (excluding cold rod drop testing).

per Westinghouse letter NF-GP-08-69. The attached interim COLR boron concentration requirement is supported by the attached Unit 2 Cycle 14 Reload Evaluation.

If you have any questions, please contact me at extension 6468.

Approved by:

A.N{1 Adel Alapour Supervisor, Vogtle Core Analysis . '.~.

cc wlo attachments B. E.Hunt B. J. Kern K. S. Folk C.~. Comfort R. G. Cocherell J. A. Wehrenberg M. A. Slivka T. M. Hickox J, V. Iannucci .

CORE OPERATING LiMITS REPORT, VEGP UNIT 2 CYCLE 14 AUGUST 2008 2.7 Nuclear Enthalpy Rjse Hot Channel Factor - F NAH (Specification 3.2.2)

NRTP 2.7.1 F ~ F* , (l + PF tJ{ . (I - P>>

Ml Ml THERMAL POWER where:

P = RATED THERMAL POWER 2.7.2  ?TP = 1.65 Ml 2.7.3 PFMf = 0.3 2.8 Axial Flux Difference (Specification 3.2.3) 2.8.1 The Axial Flux Difference (MD) Acceptable Operation Limits are provided in Figure 5.

2.9 Boron Concentration (Specification 3.9.1) 2.9.1 The borOD concentration shall be greater than or equal to 1830 ppm,*

Jorhis concentration bounds the condition ofkefTS 0.95 (all rods in less the most reactive rod) and subcriticality (ill rods out) over the entire cycle. This concentration includes additional boron to address uncertainties and B* o depletion.

Page 4 of 11

Vogtle Electric Generating Plant Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Supplement to Unit 2 Cycle 14 Core Operating Limits Report, Rev. 0 Unit 2 Cycle 14 Core Operating Limits Report, Rev. 1 Enclosure 3 Unit 2 Cycle 14 Core Operating Limits Report, Rev. 1

COLR for VEGP UNIT 2 CYCLE 14 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 2 CYCLE 14 has been prepared in accordance with the requirements of Technical Specification 5.6.5.

The Technical Requirement affected by this report is listed below:

13.1.1 SHUTDOWN MARGIN - MODES 1 and 2 The Technical Specifications affected by this report are listed below:

3.1.1 SHUTDOWN MARGIN - MODES 3, 4 and 5 3.1.3 Moderator Temperature Coefficient 3.1.5 Shutdown Bank Insertion Limits 3.1.6 Control Bank Insertion Limits 3.2.1 Heat Flux Hot Channel Factor - Fa{Z) 3.2.2 Nuclear Enthalpy Rise Hot Channel Factor F~H 3.2.3 Axial Flux Difference 3.9.1 Boron Concentration Page 1 of 11

COlR for VEGP UNIT 2 CYCLE 14 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 NRC-approved methodologies, including those specified in Technical Specification 5.6.5.

2.1 SHUTDOWN MARGIN - MODES 1 AND 2 (Technical Requirement 13.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.30 percent D.k1k.

2.2 SHUTDOWN MARGIN - MODES 3, 4 AND 5 (Specification 3.1.1) 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures 1 and 2.

2.3 Moderator Temperature Coefficient (Specification 3.1.3) 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOL/ARO/HZP - MTC shall be less positive than +0.7 x 10-4 D.k1kfF for power levels up to 70% RTP with a linear ramp to 0 D.k1kfF at 100% RTP.

The EOL/ARO/RTP-MTC shall be less negative than -5.50 x 10-4 D.k1kfF. 1 2.3.2 The MTC Surveillance limits are:

The 300 ppm/ARO/RTP-MTC should be less negative than or equal to

-4.75 x 10-4 D.k1kfF. 1 The 60 ppm/ARO/RTP-MTC should be less negative than -5.35 x 10-4 D.k1kfF. 1 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 2.4 Shutdown Bank Insertion Limits (Specification 3.1.5) 2.4.1 The shutdown banks shall be withdrawn to a position greater than or equal to 225 steps.

2.5 Control Bank Insertion Limits (Specification 3.1.6) 2.5.1 The control banks shall be limited in physical insertion as shown in Figure 3.

1 Applicable for full-power T-average of 584.4°F to 587.4°F.

Page 2 of 11

COLR for VEGP UNIT 2 CYCLE 14 2.6 Heat Flux Hot Channel Factor - Fo(Z) (Specification 3.2.1)

~RTP 2.6.1 Fa (Z) ~ _0_* K(Z) for P > 0.5 P

FRTP Fa (Z) ~ _0_* K(Z) for P ~ 0.5 0.5 THERMAL POWER where: P =

RATED THERMAL POWER 2.6.2 F~TP = 2.50 2.6.3 K(Z) RTP is provided in Figure 4.

~RTP *K(Z) 2.6.4 Fa (Z) ~ ----=.0_ _----'--'--_ for P > 0.5 P

  • W(Z)

Fa (Z)

<_ F~TP *K(Z) ~ pas 0.5

  • W(Z) lor ~ .

2.6.5 W(Z) values are provided in Table 2.

2.6.6 The Fo(Z) penalty factors are provided in Table 1.

Page 3 of 11

COLR for VEGP UNIT 2 CYCLE 14 2.7 Nuclear Enthalpy Rise Hot Channel Factor - F~ (Specification 3.2.2)

THERMAL POWER where: P =

RATED THERMAL POWER RTP 2.7.2 FII.H - 1.65 2.7.3 PFII.H = 0.3 2.8 Axial Flux Difference (Specification 3.2.3) 2.8.1 The Axial Flux Difference (AFD) Acceptable Operation Limits are provided in Figure 5.

2.9 Boron Concentration (Specification 3.9.1) 2.9.1 The boron concentration shall be greater than or equal to 1830 ppm. 1 1This concentration bounds the condition of kelf:S; 0.95 (all rods in less the most reactive rod) and subcriticality (§1l rods out) over the entire cycle. This concentration includes additional boron to address uncertainties and B10 depletion.

Page 4 of 11

COLR for VEGP UNIT 2 CYCLE 14 TABLE 1 Fa{Z) PENALTY FACTOR Cycle Fa{Z)

Burnup Penalty (MWD/MTU) Factor All Burnups 1.020 Notes:

1. The Penalty Factor, to be applied to Fa{Z) in accordance with SR 3.2.1.2, is the maximum factor by which Fa{Z) is expected to increase over a 39 EFPD interval (surveillance interval of 31 EFPD plus the maximum allowable extension not to exceed 25% of the surveillance interval per SR 3.0.2) starting from the burn up at which the Fa{Z) was determined.

Page 5 of 11

COLR for VEGP UNIT 2 CYCLE 14 TABLE 2 RAOC W(Z)

Axial Elevation 150 4000 12000 20000 Point (feet) MWD/MTU MWDlMTU MWDltiTU MWDlMTU

.... 1 12.00 1.0000 1.0000 1.0000 1.0000

. 2 3

11.80 11.60 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000

  • . 4 11.40 1.0000 1.0000 1.0000 1.0000 5 11.20 1.0000 1.0000 1.0000 1.0000 6 11.00 1.3504 1.3970 1.2131 1.2744 7 10.80 1.3328 1.3770 1.2114 1.2623 8 10.60 1.3138 1.3581 1.2120 1.2516 9 10.40 1.2923 1.3458 1.2161 1.2417 10 10.20 1.2769 1.3415 1.2205 1.2313 Il 10.00 1.2661 1.3346 1.2253 1.2196 12 9.80 1.2548 1.3270 1.2311 1.2054 13 9.60 1.2439 1.3172 1.2349 1.2009 14 9.40 1.2360 1.3036 1.2358 1.2033 15 9.20 1.2302 1.2890 1.2357 1.2068 16 9.00 1.2226 1.2754 1.2305 1.2129 17 8.80 1.2214 1.2676 1.2236 1.2177 18 8.60 1.2276 1.2652 1.2220 1.2229 19 8.40 1.2348 1.2631 1.2264 1.2340 20 8.20 1.2386 1.2585 1.2300 1.2515 21 8.00 1.2432 1.2566 1.2304 1.2661 22 7.80 1.2456 1.2531 1.2346 1.2772 23 7.60 1.2446 1.2461 1.2401 1.2856 24 7.40 1.2409 1.2368 1.2413 1.2909 25 7.20 1.2347 1.2252 1.2400 1.2933 26 7.00 1.2264 1.2118 1.2361 1.2930 27 6.80 1.2160 1.1966 1.2297 1.2896 28 6.60 1.2044 1.1805 1.2212 1.2850 29 6.40 1.1925 1.1651 1.2108 1.2808 30 6.20 1.1799 1.1.514 1.1986 1.2751 31 6.00 1.1657 1.1391 1.1842 1.2680 32 5.80 1.1529 1.1296 1.1724 1.2574 33 5.60 1.1439 1.1227 1.1701 1.2486 34 5.40 1.1406 1.1194 1.1762 1.2473 35 5.20 1.1452 1.1236 1.1799 1.2484 36 5.00 1.1499 1.1279 1.1835 1.2481 37 4.80 1.1533 1.1309 1.1871 1.2471 38 4.60 1.1560 1.1336 1.1896 1.2453 39 4.40 1.1578 1.1354 1.1906 1.2409 40 420 1.1588 1.1363 1.1902 1.2342 41 400 1.1583 1.1388 1.1892 1.2255 42 3.80 1.159,1 1.1430 1.1879 1.2145 43 3.60 1.1629 1.1473 1.1854 12026 44 3.40 1.1646 1.1504 1.1820 1.1922 45 3.20 1.1652 1.1527 1.1819 1.1831 46 3.00 1.1674 1.1535 1.1857 1.1782 47 2.80 1.1741 1.1630 1.1941 1.1803 48 2.60 1.1853 1.1820 1.2047 1.1934 49 2.40 1.1994 1.2000 1.2166 1.2044 50 2.20 1.2163 1.2203 1.2282 1.2153 51 2.00 1.2335 1.2411 1.2395 1.2264 52 1.80 1.2503 1.2612 1.2507 1.2376 53 1.60 1.2669 1.2808 1.2617 1.2490 54 1.40 1.2831 1.2996 1.2725 1.2606 55 1.20 1.2985 1.3173 1.2828 1.2722

.. 56 1.00 1.3127 1.3330 1.2922 1.2834

... 57 58 0.80 0.60 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000

... 59 60 0.40 0.20 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 61 0.00 1.0000 1.0000 1.0000 1.0000

.. Top and Bottom 5 Points Excluded per Technical Specification B3.2.1.

These W(Z) values are consistent with Figure 5 and are valid over the HFP Tavg temperature range from 584.4 to 587.4°F.

Page 6 of 11

COLR for VEGP UNIT 2 CYCLE 14 5.0 4.0 ACCEPTABLE OPERATING REGION (2 00, .1 b) 1/

V V

V REQUIRED SHUTDOWN MARGIN I V

V (1 00, .2 I>> V .....

V V

V '"

V V

.. V IUNACCEPTABLE OPERATING REGION I

(~5( , .:.: 0) 1.0 0.0 o 500 1000 1500 2000 2500 RCS BORON CONCENTRATION (ppm)

FIGURE 1 REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (FOUR LOOPS FILLED AND VENTED AND AT LEAST ONE REACTOR COOLANT PUMP RUNNING)

Page 7 of 11

COLR for VEGP UNIT 2 CYCLE 14 5.0 V

~

(2 00, .9

,r V

4.0

..V IACCEPTABLE OPERATING REGION I VI'

./

/

V V

... V IREQUIRED SHUTDOWN MARGIN~

vV' (1 50,

  • Bp)

V V

V V

V 1.0 V UNACCEPTABLE OPERATING REGION (1I6( , *c0) 0.0 o 500 1000 1500 2000 2500 RCS BORON CONCENTRATION (ppm)

FIGURE 2 REQUIRED SHUTDOWN MARGIN FOR MODES 4 AND 5 (MODE 4 WHEN FIGURE 1 NOT APPLICABLE)

Page 8 of 11

COLR for VEGP UNIT 2 CYCLE 14 (Fully Withdrawn*)

220 V 1( Z .0'15 225 V 78

  • J~ !5 V

V V 200

....... BANK B iIII 180 ./

./

./

~ II" ./

..c::

.~ 160 V

lb1 , /

1( .( I( % l61

  • lQ

.3'" 140 til BANK C 1/

~ 120 H / /

./

Eo< V /

H til 2100

, /

V

/

a c

80 1./

g 1/ BANK D

/

60

/

/

II" V "

40 v

Ill!> .IJ 61) , /

20

([3 .12~ C) 1./

o ./

0 10 20 30 40 50 60 70 80 90 1 o POWER (% of Rated Thermal Power)

  • Fully withdrawn shall be the condition where control rods are at a position within the interval Z 225 and S 231 steps withdrawn.

NOTE: The Rod Bank Insertion Limits are based on the control bank withdrawal sequence A, B, C, D and a control bank tip-to-tip distance of 115 steps.

FIGURE 3 ROD BANK INSERTION LIMITS VERSUS % OF RATED THERMAL POWER Page 9 of 11

COLR for VEGP UNIT 2 CYCLE 14 1.4 1.2 FQ = 2.50 CORE HT. K(Z) - -

0.00 1. 00 6.00 1. 00 12.0 .925 W

0.4 0.2 0.0 o 2 4 6 8 10 12 CORE HEIGHT (feet)

FIGURE 4 K(Z) - NORMALIZED Fa(Z) AS A FUNCTION OF CORE HEIGHT Page 10 of 11

COLR for VEGP UNIT 2 CYCLE 14 120 110

( 15, 100) (+10, 100) 100 I ~

1-1 CD 90 U~AC 'EP~ ABlE

/ \ UN; CC PTA ~LE

~ / \

..-t 80 J \

e CD

/ \

.£l E-t 70 II

/ A~CE TAl LE

\

'0 \

CD

.j,J

~. 60 / \

/ \

1/

I (-30, 50) I (+26, 50) 30 20 10 o

-50 -40 -30 -20 -10 0 10 20 30 40 50 AXIAL FLUX DIFFERENCE (percent ~I)

FIGURE 5 AXIAL FLUX DIFFERENCE I_IMITS AS A FUNCTION OF

% OF RATED THERMAL POWER FOR RAOC Page 11 of 11

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