NL-06-0151, Cycle 13 Core Operating Limits Report

Cycle 13 Core Operating Limits Report

ML060320722
Person / Time
Site:	Vogtle
Issue date:	01/31/2006
From:	Grissette D Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-06-0151
Download: ML060320722 (19)

Text

Don E. Grissette Southern Nuclear Vice President Operating Company, Inc.

40 lnverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.6474 Fax 205.992.0341 SOUTHERN&

1 COMPANY January 3 1 , 2006 Energy to Serve fiur WorldsM Docket No.: 50-424 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant Unit 1 Cycle 13 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 2 of the Unit 1 Cycle 13 Core Operating Limits Report (COLR).

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

Don E. ~ r G s e t t e

Enclosure:

Unit 1 Cycle 13 Core Operating Limits Report cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. T. E. Tynan, General Manager - Plant Vogtle RType: CVC7000 U. S. Nuclear Regulatory Commission Dr. W. D. Travers, Regional Administrator Mr. C. Gratton, NRR Project Manager - Vogtle Mr. G. J. McCoy, Senior Resident Inspector - Vogtle

VOGTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 1 CYCLE 13 CORE OPERATING LIMITS REPORT REVISION 2 January 2006

COLR for VEGP UNlT 1 CYCLE 13 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNlT 1 CYCLE 13 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.I SHUTDOWN MARGIN - MODES 1 and 2 The Technical Specifications affected by this report are listed below:

3.1.I SHUTDOWN MARGIN - MODES 3,4and 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&

3.2.3 Axial Flux Difference 3.9.1 Boron Concentration PAGE 1 of 17

COLR for VEGP UNIT 1 CYCLE 13 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. l )

2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.30 percent AWk.

2.2 SHUTDOWN MARGIN - MODES 3. 4 AND 5 (Specification 3.1 . l )

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 1o4 AWW°F for power levels up to 70 percent RTP with a linear ramp to 0 AWkPF at 100 percent RTP.

The EOUAROIRTP-MTC shall be less negative than

-5.50 x 1o4 AW~PF.'

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 1o4 AW~PF.'

The 60 ppm/ARO/RTP-MTC should be less negative than

-5.35 x 1o - A~W ~ P F . ~

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 lnsertion 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 lnsertion Lirr~its(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 586.4OF to 587.4OF.

PAGE 2 of 17

COLR for VEGP UNIT 1 CYCLE 13 2.6 Heat Flux Hot Channel Factor - FQ(Z)(Specification 3.2.1)

F T;P 2.6.1 FQ(Z) I -* K(Z) for P > 0.5 P

F T;P FQ(z) 5 05* K(Z) for P I 0.5 THERMAL POWER where: P =

RATED THERMAL POWER 2.6.3 K(Z) is provided in Figure 4.

F T;P *K(Z) 2.6.4 FQ(z) 5 for P > 0.5 P

• W(Z)

FGTP *K(Z) for P S 0.5 F~(z)' 0.5*W(Z) 2.6.5 W(Z) values for Set 1 are provided in Figures 7 through 9 and for Set 2 in Figures 10 through 12.

The following W(Z) factors will be valid provided that the measured axial offset (i.e., the axial offset measured by an in-core flux map) is within the range as defined by the validity table below.

Axial Offset Validity for W(Z) Factors Cycle Burnup Minimum Maximum Breakpoint (MWDIMTU) A 0 (%) A 0 (%) A 0 (%)

COLR for VEGP UNIT 1 CYCLE 13 In general, it is required that Minimum A 0 < Measured Axial Offset (MAO) < Maximum AO. Otherwise, contact Westinghouse and follow the guidelines provided in Revision 3 of the A 0 Validity Criteria.

For cycle burnups < 18,000 MW DIMTU, if MA0 is r Breakpoint AO, use W(Z) Set 1.

if MA0 is < Breakpoint AO, use W(Z) Set 2.

For cycle burnups 2 18,000 and 5 22,006 MWDIMTU, if MA0 is r Breakpoint AO, use W(Z) Set 2.

if MA0 is < Breakpoint AO, use W(Z) Set 1.

For cycle burnups > 22,006 and 123,106 MWDIMTU, use the same W(Z) Set as was selected for the last flux map prior to 22,006 MWDIMTU.

Also, linear interpolation should be performed on A 0 (%) to the burnup of the flux map.

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

2.7 Nuclear Enthal~vRise Hot Channel Factor - F L (Specification 3.2.2) 2.7.1 F,N, 5 FZF * (1 + PFAH* (1 - P))

THERMAL POWER where: P =

RATED THERMAL POWER 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 1935 ppm.'

'This concentration bounds the condition of ketf50.95 (all rods in less the most reactive rod) and subcriticality (aJ rods out) over the entire cycle. This concentration includes additional boron to address uncertainties and B depletion.

PAGE 4 of 17

COLR for VEGP UNIT 1 CYCLE 13 TABLE 1 FQ(Z)PENALTY FACTOR Notes:

1. The Penalty Factor, to be applied to FQ(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) 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 17

COLR for VEGP UNIT 1 CYCLE 13 FIGURE 1 REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (FOUR LOOPS FILLED AND VENTED AND AT LEAST ONE REACTOR COOLANT PLIMP RLINNING)

COLR for VEGP UNIT 1 CYCLE 13 5.00 4.00 ACCEPTABLE E OPERATING

% LI REGION E

!l Y

3.00 3a REQUIRED SHUTDOWN MARGIN E

f0 2.00 P

3 I UNACCEPTABLE V) OPERATING REGION 1.oo -

(460, I.OO) 0.00 0 500 1000 1500 2000 2500 RCS BORON CONCENTRATION (ppm)

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

PAGE 7 of 17

COLR for VEGP UNIT 1 CYCLE 13 (Fully Withdrawn ')

POWER (percent of Rated Thermal Power)

Fully withdrawn shall be the condition where control rods are at a position within the interval 2225 and a 3 1 steps withdrawn.

NOTE: The Rod Bank Insertion Limits are based on the control bank withdrawal sequence A, 8, 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 8 of 17

COLR for VEGP UNIT 1 CYCLE 13 CORE HEIGHT (ft) 217%

FIGURE 4 K(Z) NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT PAGE 9 of 17

COLR for VEGP UNIT 1 CYCLE 13 AXIAL FLUX DIFFERENCE (percent AI)

AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF % OF RATED THERMAL POWER FOR RAOC PAGE 10 of 17

COLR for VEGP UNIT 1 CYCLE 13 This data is intentionally deleted.

FIGURE 6 RAOC W(Z) AT 150 MWDNTU PAGE 11 of 17

COLR for VEGP UNIT 1 CYCLE 13 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 1.2738 12 9.80 1.2620 13 9.60 1.2512 14 9.40 1.2382 15 9.20 1.2238 16 9.00 1.2098 17 8.80 1.2045 18 8.60 1.2037 19 8.40 1.2074 20 8.20 1.2080 21 8.00 1.2073 22 7.80 1.2044 23 7.60 1.1987 24 7.40 1.1910 25 7.20 1.1821 26 7.00 1.1739 27 6.80 1.1662 28 6.60 1.1572 29 6.40 1.1475 30 6.20 1.1370 31 6.00 1.1264 32 5.80 1.1167 33 5.60 1.1153 34 5.40 1.1245 35 5.20 1.1330 36 5.00 1.1408 37 4.80 1.1482 38 4.60 1.1552 39 4.40 1.1616 40 4.20 1.1669 41 4.00 1.1710 42 3.80 1.1740 43 3.60 1.1760 44 3.40 1.1770 45 3.20 1.1787 46 3.00 1.1904 47 2.80 1.2108 48 2.60 1.2335 49 2.40 1.2556 50 2.20 1.2776 51 2.00 1.2991 52 1.80 1.0000 53 1.60 1.0000 54 1.40 1.0000 0.0 2.0 4.0 6.0 8.0 10.0 12 55 1.20 1.0000 Core Height - f e e t 56 1.00 1.0000 57 0.80 1.0000 This figure Is referred to by Specification B3.2.1 58 0.60 1.0000 59 0.40 1.0000 These W@) values are wnslstent with Figure 5, and are wlid 60 0.20 1.0000 over the HFP TWgtemperature range from 586.4 to 587.4OF. 61 0.00 1.0000 See COLR Sectlon 2.6.5 for A 0 Validity Rules

• Top and Bottom 15% Excluded per Technical Specification83.2.1 FIGURE 7 RAOC W(Z) AT 4,000 MWDIMTU (SET 1)

PAGE 12 of 17

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevation MOL-2 Point I

0.0 2.0 4.0 6.0 8.0 10.0 12.

Core Height - feet This figure is referred to by Specleation B3.2.1 These W(2) values are consistent with Figure 5, and are valid over the HFP TWgtemperature range from 586.4 to 587.4"E Top and Bottom 15% Excluded per See COLR S d o n 26.5 for A 0 VaUdlty Rules Technical Spedficaflon B3.2.1 FIGURE 8 RAOC W(Z) AT 12,000 MWDIMTU (SET 1)

PAGE 13 of 17

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevatian EOL Point (feet) 1 12.00 2 11.80 3 11.60 11.40 11.20 11.oo 10.80 10.60 10.40 10.20 10.00 9.80 9.60 9.40 9.20 9.00 8.80 8.60 8.40 8.20 8.00 7.80 7.60 7.40 7.20 7.00 6.80 6.60 6.40 6.20 6.00 5.80 5.60 5.40 5.20 5.00 4.80 4.60 4.40 4.20 4.00 3.80 3.60 3.40 3.20 3.00 2.80 2.60 2.40 2.20 2.00 1.80 1.60 1.40 0.0 2.0 4.0 6.0 8.0 10.0 12 1.20 C o r e H e i g h t - feet 1.00 0.80 This figure is referred to by Speclcatbn B3.21 0.60 0.40 These W(Z) values are consistent with Figure 5, and are valid 0.20 over the HFP Tmgtemperature range from 586.4 to 587.401C 0.00 See COLR Section 2.6.5 for A 0 Valldlty Rules. Top and Bottom 15% Excluded per Technical Spedficatlon B3.2.1 FIGURE 9 RAOC W(Z) AT 20,000 MWDIMTU (SET 1)

PAGE 14 of 17

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevation MOL- 1 Point (feet) 1 12.00 2 11.80 3 11.60 11.40 11.20 11.oo 10.80 10.60 10.40 10.20 10.00 9.80 9.60 9.40 9.20 9.00 8.80 8.60 8.40 8.20 8.00 7.80 7.60 7.40 7.20 7.00 6.80 6.60 6.40 6.20 6.00 5.80 5.60 5.40 5.20 5.00 4.80 4.60 4.40 4.20 4.00 3.80 3.60 3.40 3.20 3.00 2.80 2.60 2.40 2.20 2.00 1.80 1.60 1.40 0.0 2.0 4.0 6.0 8.0 10.0 12. 1.20 Core Height - f e e t 1.oo 0.80 This figure is referred to by Speclflcation 83.2.1 0.60 0.40 These W(Z) values are consistent wlth Figure 5, and are =lid 0.20 over the HFP TWgtemperature range from 5864 to 587.4°F. 0.00 See COLR Section 2.6.5 for A 0 Validity Rubs Top and Bottom 15% Excluded per Technical SpecificationB3.2.1 FIGURE 10 RAOC W(Z) AT 4,000 MWDIMTU (SET 2)

PAGE 15 of 17

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevation MOL-2 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 1.3245 12 9.80 1.3164 13 9.60 1.3141 14 9.40 1.3099 15 9.20 1.3014 16 9.00 1.2931 17 8.80 1.2824 18 8.60 1.2764 19 8.40 1.2784 20 8.20 1.2767 21 8.00 1.2773 22 7.80 1.2764 23 7.60 1.2701 24 7.40 1.2610 25 7.20 1.2463 26 7.00 1.2204 27 6.80 1.1929 28 6.60 1.1717 29 6.40 1.1522 30 6.20 1.1335 31 6.00 1.1178 32 5.80 1.1053 33 5.60 1.1009 34 5.40 1.1029 35 5.20 1.1046 36 5.00 1.1058 37 4.80 1.1057 38 4.60 1.1055 39 4.40 1.1043 40 4.20 1.1018 41 4.00 1.0980 42 3.80 1.0929 43 3.60 1.0877 44 3.40 1.0830 45 3.20 1.0807 46 3.00 1.0833 47 2.80 1.0908 48 2.60 1.0983 49 2.40 1.1055 50 2.20 1.1123 51 2.00 1.1186 52 1.80 1.0000 53 1.60 1.0000 54 1.40 1.0000 0.0 2.0 4.0 6.0 8.0 10.0 12. 55 1.20 1.0000 Core Height - feet 56 57 1.00 0.80 1.0000 1.0000 Thls figure is referred to by Speclcatlon B3.2.1 58 0.60 1.0000 59 0.40 1.0000 These W(Z) wlues are consistent with Figure 5, and are wlld 60 0.20 1.0000 over the HFP Tmg temperature range from 586.4 to 587.4"F. 61 0.00 1.0000 See COLR Section 2.6.5 for A 0 Validity Rules. Top and Bottom 15% Excluded per Technical Specification B3.2.1 FIGURE 11 RAOC W(Z) AT 12,000 MWDMTU (SET 2)

PAGE 16 of 17

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevatian EOL Point 1

2 3

0.0 2.0 4.0 6.0 8.0 10.0 12.

Core Height - f e e t Thls Ugure is referred to by Speclcatbn B3.21 These W(Z) values are consistent with Figure 5,and are wild over the HFP TNBtemperature range from 586.4 to 587.4"F.

See COLR Section 26.5 for A 0 Valldity Rules Top and Bottom 15% Excluded per Technical Specification B3.2.1 FIGURE 12 RAOC W(Z) AT 20,000 MWDIMTU (SET 2)

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