NL-03-1078, Cycle 11 Core Operating Limits Report

Cycle 11 Core Operating Limits Report

ML031350224
Person / Time
Site:	Vogtle
Issue date:	05/13/2003
From:	Gasser J Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-03-1078
Download: ML031350224 (16)

Text

Jeffrey T. Gasser Vice President Southern Nuclear Operating Company, Inc.

40 Invemess Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7721 Fax 205.992.0403 SOUTHERN A COMPANY Energy to Serve YourWorld' May 13, 2003 Docket Nos.:

NL-03-1078 50-424 50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant Unit 1 Cycle 11 Core Operating Limits Report 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 1 of the Unit 1 Cycle 11 Core Operating Limits Report (COLR).

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

Sincerely Jeffrey T. Gasser JTGIRJF

Enclosure:

Unit 1 Cycle 11 Core Operating Limits Report cc:

Southern Nuclear Operating Company Mr. J. D. Woodard, Executive Vice President Mr. W. F. Kitchens, General Manager - Plant Vogtle Mr. M. Sheibani, Engineering Supervisor - Plant Vogtle Document Services RTYPE: CVC7000 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. F. Rinaldi, NRR Project Manager - Vogtle Mr. J. Zeiler, Senior Resident Inspector - Vogtle

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VOGTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 1 CYCLE 11 CORE OPERATING LIMITS REPORT REVISION 1 MAY 2003

COLR for VEGP UNIT 1 CYCLE 11 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 1 CYCLE 11 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 - FQ(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 14

COLR for VEGP UNIT 1 CYCLE 11 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 Ak/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 104 Ak/k/OF for power levels up to 70 percent RTP with a linear ramp to 0 Ak/k/0F at 100 percent RTP.

The EOUARO/RTP-MTC shall be less negative than

-5.50 x 104 Ak/k/PF.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 104 Ak/k/PF.1 The 60 ppm/ARO/RTP-MTC should be less negative than

-5.35 x 104 Ak/k/PF.'

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.

AppicabIe for full-power T-average of 586.40F to 587.40F.

PAGE 2 of 14

COLR for VEGP UNIT 1 CYCLE 11 2.6 Heat Flux Hot Channel Factor - Fo(Z) (Specification 3.2.1)

RTP Fo 2.6.1 FQ(Z) c _

• K(Z) for P > 0.5 p

RTP FQ FQ(Z) '

• K(Z)

0.5 where

P =

RATI for P < 0.5 FHERMAL POWER ED THERMAL POWER RTP 2.6.2 FQ = 2.50 2.6.3 K(Z) is provided in Figure 4.

RTP 2.6.4 FQ(Z) <Fo

• K(Z)

P

• W(Z)

'or P > 0.5 RTP FQ(Z) < FQ

• K(Z) for P < 0.5 0.5

• W(Z) 2.6.5 W(Z) values are provided in Figures 6 through 9.

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

PAGE 3 of 14

COLR for VEGP UNIT 1 CYCLE 11 2.7 Nuclear Enthalpy Rise Hot Channel Factor - FNH (Specification 3.2.2) 2.7.1 FNH < FH (1 + PFAH *(1-P))

where: P =

THERMAL POWER RATED THERMAL POWER 2.7.2 FRH

= 1.65 2.7.3 PFAH

= 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 1970 ppm.'

'This concentration bounds the condition of kff < 0.95 (all rods in less the most reactive rod) and subcriticality (all rods out) over the entire cycle. This concentration includes additional boron to address uncertainties and B'0 depletion.

PAGE 4 of 14

COLR for VEGP UNIT 1 CYCLE 11 TABLE 1 FQ(Z) PENALTY FACTOR Cycle FQ(Z)

Burnup Penalty (MWD/MTU)

Factor 30 150 363 576 789 1002 1.020 1.030 1.029 1.025 1.022 1.020 Notes:

1.

The Penalty Factor, to be applied to F0(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 burnup at which the FQ(Z) was determined.

2.

Linear interpolation is adequate for intermediate cycle burnups.

3.

For all cycle burnups outside the range of the table, a penalty factor of 1.020 shall be used.

PAGE 5 of 14

COLR for VEGP UNIT 1 CYCLE 11

,nn.

4

+

+

4 ACCEPTABLE OPERATING REGION REQUIRED SHUTDOWN MARGIN (1600,2.25 (950, 1.30) 1000 1500 (2500, 3.1L, UNACCEPTABLE OPERATING REGION 2000 RCS BORON CONCENTRATION (ppm)

FIGURE 1 REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (MODE 4 WITH AT LEAST ONE REACTOR COOLANT PUMP RUNNING)

PAGE 6 of 14 4.00 3.00 C

0 I-D Cl) 1.00 I

o-11 I

0 500 2500 2175-1 l

r, 000

COLR for VEGP UNIT 1 CYCLE 11 I-I I

ACCEPTABLE OPERATING REGION B-I

-

4-REQUIRED SHUTDOWN MARGIN

.A/

(12585 (460, 1.00)

(2500,4.90)

UNACCEPTABLE OPERATING REGION nnl i

4-500 h

i 1000 1500 2000 RCS BORON CONCENTRATION (ppm)

FIGURE 2 REQUIRED SHUTDOWN MARGIN FOR MODES 4 AND 5 (MODE 4 WITH NO REACTOR COOLANT PUMPS RUNNING) 2500 217I PAGE 7 of 14 5.00 4.00 AC a 3.00

-CD z

B 2.00 0

0D.

C, 1.

0.00 - 0 r

Wvu

COLR for VEGP UNIT 1 CYCLE 11 (Fully Withdrawn *)

161) 0 20 40 60 80 100 POWER (percent of Rated Thermal Power) 2175.1

' Fully wifthdrawn shall be the condition where control rods are at a position within th interval 2225 and s231 steps withdrawn.

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

FIGURE 3 ROD BANK INSERTION LIMITS VERSUS % OF RATED THERMAL POWER PAGE 8 of 14 I.)

z0 Co 0

z 0

1-

COLR for VEGP UNIT 1 CYCLE 11 on_.

001 i

I F

+

+

+

+

T= =

2==

CORE HEIGHT K(Z) 0.000

'1.000 6.000 1.000 12.0001 0.925-2.0 4.0 6.0 8.0 10.0 CORE HEIGHT (ft)

FIGURE 4 K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT PAGE 9 of 14

.1 I.rL1 1.

cr0 LL z

w a

w N

0zF5:

oc 0.80 0.60 0.40 0.20 I

0 0

12.0 2175-

COLR for VEGP UNIT 1 CYCLE 11 0

C IL

-w 0CL lY AXIAL FLUX DIFFERENCE (percent I)

FIGURE 5 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF % OF RATED THERMAL POWER FOR RAOC PAGE 10 of 14

COLR for VEGP UNIT 1 CYCLE 11 N

0.0 2.0 4.0 6.0 8.0 Core Height - feet Ibis figure is refered to by Spedficalon B3j Axi Point

_ _ 2

• 4 5

6 i

7 9

10 11 3-12 13 14 15 16 17 18 19 20 22 A

~~~~23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

~~39 40 41 42

~~43 44 45 46 47 48 49 50 51

~52 10.0 12.0 53 54 55 2

56 57 58 59 Ll 60 61 Elevation BOL (ket)

W(Z) 12.0 1.0000 11.80 1.0000 11.60 1.0000 11.40 1.0000 11.00 1.0000 11.00 1.0000 10.80 1.0000 10.60 1.0000 10.40 1.0000 10.20 1.0000 10.00 1.3488 9.80 1.3221 9.60 12927 9.40 1.2699 9.20 1.2496 9.00 1.2289 8.80 1.2186 8.60 1.2164

&40 1.2196 8.20 1.2203 8.00 1.2243 7.80 1.2299 7.60 1.2317 7.40 1.2313 7.20 12286 7.00 1.2240 6.80 1.1935 6.60 1.1859 6.40 1.1784 6.20 1.1696 6.00 1.1592 5.80 1.1539 5.60 1.1546 5.40 1.1643 5.20 1.1783 5.00 1.1924 4.80 1.2053 4.60 1.2176 4.40 1.2290 4.20 1.2393 4.00 1.2484 3.80 12526 3.60 1.2570 3.40 12602 3.20 12609 3.00 1.2694 2.80 12865 2.60 1.3060 2.40 1.3252 2.20 1.3451 2.00 1.3659 1.80 1.0000 1.60 1.0000 1.40 1.0000 1.20 1.0000 1.00 1.0000 0.80 1.0000 0.60 1.0000 0.40 1.0000 0.20 1.0000 0.00 1.0000

• Top and Bottom 15% Exduded per Tedumical Spedifion B321 These W(Z) values are consistent with Figure 5 and are valid over the HFP T, temperature range from 586.40Fto 587.40F.

FIGURE 6 RAOC W(Z) AT 150 MWD/MTU PAGE 11 of 14

COLR for VEGP UNIT 1 CYCLE 11 3 1.:

Core Height - feet Ihls figure Is referred to by Spedfication B32.1 Axial Elevation MOL-1 Point (feet)

W(Z) 1 12.00 1.0000 2

11.80 1.0000 3

11.60 1.0000 4

11.40 1.0000 5

11.20 1.0000 6

11.00 1.0000 7

10.80 1.0000 8

10.60 1.0000 9

10.40 1.0000 10 10.20 1.0000 11 10.00 1.3554 12 9.80 13231 13 9.60 12937 14 9.40 12756 15 9.20 12540 16 9.00 12404 17 8.80 12374 18 8.60 12374 19 8.40 12406 20 820 12412 21 8.00 12392 22 7.80 12351 23 7.60 12290 24 7.40 1.2211 25 7.20 12114 26 7.00 12001 27 6.80 1.1776 28 6.60 1.1680 29 6.40 1.1582 30 6.20 1.1499 31 6.00 1.1606 32 5.80 1.1548 33 5.60 1.1516 34 5.40 1.1560 35 5.20 1.1633 36 5.00 1.1702 37 4.80 1.1763 38 4.60 1.1816 39 4.40 1.1861 40 420 1.1896 41 4.00 1.1924 42 3.80 1.1987 43 3.60 12063 44 3.40 12125 45 3.20 12202 46 3.00 1.2329 47 2.80 12525 48 2.60 1.2766 49 2.40 13002 50 2.20 1.3236 51 2.00 1.3469 52 1.80 1.0000 53 1.60 1.0000 54 1.40 1.0000 55 1.20 1.0000 56 1.00 1.000 57 0.80 1.000 58 0.60 1.0000 59 0.40 1.0000 60 020 1.0000 61 0.00 1.0000

• Tpand Bottom 15% Excluded per Techrical SpeciScation B32.1 These W(Z) values are consistent with Figure 5 and are valid over the HFP T., temperature range from 586.40F to 587.40F.

FIGURE 7 RAOC W(Z) AT 4000 MWDIMTU PAGE 12 of 14

COLR for VEGP UNIT 1 CYCLE 11 S

0.0 2.0 lids flg Axd Point

• 2

~~~~~~~~~~3

• 4

• 6

~~~~~~~~~~~7

• 8

• 9 10 11

~~~~~~~~~~~~12 13 14 15

~~~~~~~~~~~~16 17 18 19 20

~~~~21 22 23 24 25 AA

~~~~26 A

~~~~28 29 30 AMA AAAA

~~~~31 A

~~~~~~~32 A

~~~~~~~~33 4

~~~~~~34 A

~~~~~~~~35 AAAA

~~~~~~~~~~36

&A AAA&

37 38

~~~~~~39 40 41 42 43 44 45 46 47 48 49 s0 51

~~~~~52 4.0 6.0 8.0 10.0 12.0 53 54 Core Height - feet 55 56 57 58 wreIs referred toby Spedflcatou B32.1 60 61 Elevation MOL-2 (feet)

WtZ) 12.00 1.0000 11.80 1.0000 11.60 1.0000 11.40 1.0000 1120 1.0000 11.00 1.0000 10.80 1.0000 10.60 1.0000 10.40 1.0000 1020 1.0000 10.00 1.3024 9.80 12899 9.60 12855 9.40 1.2785 9.20 1.2662 9.00 1.2544 8.80 12405 8.60 12309 8.40 1.2321 8.20 1.2315 8.00 12334 7.80 1.2390 7.60 1.2405 7.40 1.2397 720 12362 7.00 12305 6.80 1.222 6.60 1.2127 6.40 12015 6.20 1.1898 6.00 1.1781 5.80 1.1699 5.60 1.1679 5.40 1.1710 520 1.1753 5.00 1.1785 4.80 1.1803 4.60 1.1808 4.40 1.1799 420 1.1778 4.00 1.1739 3.80 1.1707 3.60 1.1693 3.40 1.1673 3.20 1.1659 3.00 1.1659 2.80 1.1698 2.60 1.1775 2.40 1.1856 2.20 1.1937 2.00 12025 1.80 1.0000 1.60 1.0000 1.40 1.0000 120 1.0000 1.00 1.0000 0.80 1.0000 0.60 1.0000 0.40 1.0000 020 1.000 0.00 10000

• Top and Bottm 15Exduded per Tediical Speficaion 31 These W(Z) values are consistent with Figure 5 and are valid over the HFP T temperature range from 586 40F to 587.40F.

FIGURE 8 RAOC W(Z) AT 12000 MWDIMTU PAGE 13 of 14

COLR for VEGP UNIT 1 CYCLE 11 1.6 Axdal Elevation EOL Point (l

4'. u 1

t2.0 1.0(

2 11.80 1.0000 3

11.60 1.0000 4

11.40 1.0000 5

11.20 1.0000 6

11.00 1.0000 1._-

7 10.80 1.0000 1.5 _

I_

8 10.60 1.0000 9

10.40 1.0000 10 10.20 1.0000 11 10.00 1.2251

~~~

~~~~~

~~~~~~~~~~12 9.80 1.2274 13 9.60 12273 14 9.40 1.2268 15 9.20 1.2255 16 9.00 12335 1.4 17 8.80 12507 18 8.60 12647 19 8.40 1.2749 20 820 12862 21 8.00 12946 22 7.80 1.2917 23 7.60 13028 24 7.40 1.3092 N 1A 25 720 13121 1.3 A

26 7.00 1.3116 AA 27 6.80 1.3079 A

^

28 6.60 1.3012 A

29 6.40 1.2918 30 6.20 12800

. AAAA

_d31 6.00 12653 A

AAAA

~~~

~~~~~

~~32 5.80 1.2501 A

^___

33 5.60 12416 34 5.40 1.2419 1.2 A_

35 520 12441 AA _

36 5.00 12443 AAAA_

37 4.80 12424 38 4.60 12382 39 4.40 1.2318 40 420 12234 41 4.00 12120 42 3.80 12016 43 3.60 1.1940 a.:_44 3.40 1.1850 45 320 1.1746 46 3.00 1.1772 47 2.80 1.1760 48 2.60 1.1823 49 2.40 1.1875 50 220 1.1955 51 2.00 12045

.0 52 1.80 1.0000 53 1.60 1.0000 0.0 2.0 4.0 6.0 8.0 10.0 12.0 S4 1.40 10000 Core Height - feet 5

100 10000 57 0.80 1.0000 58 0.60 1.0000 59 0.40 1.0000 This figure is referred to by Spedficatlon B3+/-1 60 020 1.0000 61 0.00 1.0000 Top and Bottom 15% Exduded per Tedmkal Spedfiation B32.1 These W(Z) values are consistent with Figure 5 and are valid over the HFP Tg temperature range from 586.40F to 587.40F.

FIGURE 9 RAOC W(Z) AT 20000 MWD/MTU PAGE 14 of 14