NL-05-0533, Cycle 13 Core Operating Limits Report

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Cycle 13 Core Operating Limits Report
ML050820243
Person / Time
Site: Vogtle Southern Nuclear icon.png
Issue date: 03/21/2005
From: Grissette D
Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-05-0533
Download: ML050820243 (16)
v • d • e


Text

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

40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.6474 Fax 205.992.0341 S SOUTHERN COMPANY March 21, 2005 Energy to Serve Your World"'

Docket No.: 50424 NL-05-0533 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant Unit I 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 0 of the Unit I Cycle 13 Core Operating Limits Report (COLR).

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

Sincerely, Don E. Grissette DEG/RJF/daj

Enclosure:

Unit I Cycle 13 Core Operating Limits Report cc: Southem Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. W. F. Kitchens, General Manager - Plant Vogtle RType: CVC7000 U. S. Nuclear Regulatory Commission Dr. W. D. Travers, Regional Administrator Mr. C. Gmtton, 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 0 MARCH 2005

COLR for VEGP UNIT 1 CYCLE 13 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 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:

13.1.1 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 - FAH 3.2.3 Axial Flux Difference 3.9.1 Boron Concentration PAGE 1 of 14

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 13.1.1) 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 10Q4 Ak/kI&F for power levels up to 70 percent RTP with a linear ramp to 0 Ak/k/0F at 100 percent RTP.

The EOL/ARO/RTP-MTC shall be less negative than

-5.50 x 104 Ak/k/'F. 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/c1F.l The 60 ppm/ARO/RTP-MTC should be less negative than

-5.35 x 104 Ak/k/0F.'

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.

'Applicable for full-power T-average of 586.40F to 587.40F.

PAGE 2 of 14

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

RTP F0 2.6.1 Fo(Z) < *K(Z) for P > 0.5 P

RTP Fo Fa(Z) S - K(Z) for P < 0.5

0.5 where

P = IFHERMAL POWER RATiED THERMAL POWER RTP 2.6.2 F0 = 2.50 2.6.3 K(Z) is provided in Figure 4.

RTP 2.6.4 Fo(Z) < Fa *K( ifor P > 0.5 P

  • W(Z)

RTP Fa(Z) <-E_ *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 Fo(Z) penalty factors are provided in Table 1.

PAGE 3 of 14

COLR for VEGP UNIT 1 CYCLE 13 2.7 Nuclear Enthalpy Rise Hot Channel Factor - FANH (Specification 3.2.2) 2.7.1 ANH H * (1 + PFAH *(1-P))

where: P = THERMAL POWER RATED THERMAL POWER 2.7.2 FASH = 1.65 2.7.3 PF&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 1935 ppm.'

'This concentration bounds the condition of kff < 0.95 (all rods in less the most reactive rod) and subcriticality (al 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 13 TABLE 1 Fa(Z) PENALTY FACTOR Cycle Fo(Z)

Burnup Penalty (MWD/MTU) Factor 30 1.036 150 1.036 363 1.038 577 1.037 790 1.035 1004 1.031 1217 1.024 1431 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 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 Fo(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 13 nn 4.00 ACCEPTABLE OPERATING REGION e

(2500, 3.1)_

3.00 z

REQUIRED SHUTDOWN MARGIN 00000 (1600,225 0

2.00 7-I UNACCEPTABLE OPERATING (95071.30) REGION 4- .4. 4 4 1.00 _

i A 0.00 0 500 1000 1500 2000 2500 2115-1 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 6 of 14

COLR for VEGP UNIT 1 CYCLE 13 5,.Vu nII .

(2500, 4.90)

4. 00 ACCEPTABLE OPERATING I REGION a3. 00 zz (1250,2285)

REQUIRED SHUTDOWN MARGIN r 2. 00 0

I UNACCEPTABLE Cl) OPERATING REGION

1. 00 _ (460,1.00) n' nn- I, 0 500 1000 1500 2000 2500 21tI1 RCS BORON CONCENTRATION (ppm)

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

PAGE 7 of 14

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

161)

(12 z

0 0~

z ru 0

cc 0 20 40 60 80 100 21751 POWER (percent of Rated Thermal Power)

  • Fully withdrawn shall be the condition where control rods are at a position within the interval >X-4 and s231 steps withdrawn.

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

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

COLR for VEGP UNIT 1 CYCLE 13 on .

4

.r-u

1. oin. I I i 0

C., 0.80 1 I 4 4- 4- z a-0 0.60 N

cr UJ n An I 4 .1-0 v."u z Fo ~2.50 CORE HEIGHT K(Z) 0.20 0.000 1.000. 4 4- 4 4 6.000 1.000 12.000 10.925 I'm urn .

0 2.0 4.0 6.0 8.0 10.0 12.0 CORE HEIGHT (ft) 2175-FIGURE 4 K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT PAGE 9 of 14

COLR for VEGP UNIT 1 CYCLE 13 120 100 CL EU 7Z 0

Cs CD cr w

0z 0E O I 1J -

-50 30 -20 -10 0 10 20 30 40 50 AXIAL FLUX DIFFERENCE (percentl)

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 13 Axial Elevation BOL Point (feet) W(Z)

1.
  • 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
1. . . - 10 10.20 1.0000 11 10.00 1.2472 12 9.80 1.2413 13 9.60 1.2350

_ 14 9.40 1.2285 15 9.20 1.2228 16 9.00 1.2142 17 8.80 12147 1 18 8.60 1.2222 19 8.40 1.2293 20 8.20 1.2348 A 21 8.00 1.2370 22 7.80 1.2417 23 7.60 1.2464 24 7.40 1.2473 25 7.20 1.2457

-N 26 7.00 1.2418

- 1. _- -27 6.80 1.2115 28 6.60 1.2038 29 6.40 1.1943 A 30 6.20 1.1833 31 6.00 1.1759

_ 32 5.80 1.1727 i

A 33 34 5.60 5A0 1.1699 1.1736

& 35 5.20 1.1865

1. . - - - 36 5.00 1.1994 A A 37 4.80 1.2107 38 4.60 1.2215 39 4.40 1.2323

_40 4.20 1.2438 41 4.00 1.2543 42 3.80 1.2592 43 3.60 1.2633 44 3.40 1.2659

1. _45 3.20 1.2666 46 3.00 1.2767 47 2.80 1.2976 48 2.60 1.3227

_ 49 2.40 1.3467 50 2.20 1.3703 51 2.00 1.3935

  • 52 1.80 1.0000
1.
  • 53 1.60 1.0000
  • 54 1.40 1.0000 2 0 4 0 6. 0 8 0 1 .0 12 °0 55 1.20 1.0000 Core Height - feet
  • 56 1.00 1.0000
  • 57 0.80 1.0000 This iRigure Is referred to by Specification B32.1
  • 58 0.60 1.0000
  • 59 0.40 1.0000 These W(Z) valhics are consistent with Figure S, and are valid
  • 60 020 1.0000 over the IIFP T. ^ temperature range from 586.4 to 587A°F.
  • 61 0.00 1.0000

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevation MOL-1 Point (feet) W(Z)

1. b
  • 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 1.2825 12 9.80 1.2720 13 9.60 1.2625 14 9.40 1.2507 15 9.20 12375 16 9.00 1.2241 17 8.80 12196
1. 4 18 8.60 1.2203 19 8.40 12258 20 8.20 1.2278 21 8.00 12277 22 7.80 12254 23 7.60 1.2212 24 7A0 1.2150 25 7.20 1.2072 N 3& 26 7.00 1.1982 t- 1. 27 28 6.80 6.60 1.1780 1.1702 rA ,A AA h 29 6.40 1.1622 A 30 620 1.1531 A 31 6.00 1.1599 32 5.80 1.1504 A 33 5.60 1.1496 34 5A0 1.1599 35 5.20 1.1695
1. 36 5.00 1.1786 37 4.80 1.1874 A & 38 4.60 1.1952 A & 39 4.40 1.2020

4hi 40 4.20 1.2080 41 4.00 1.2128 42 3.80 12189 1-A 43 3.60 12241 O ___& _ _ _ __ 44 3.40 1.2282

1. 45 3.20 12330 46 3.00 12478 47 2.80 12719 48 2.60 1.2989 0- 49 2.40 1.3253 50 2.20 1.3518 Sl 2.00 1.3779
  • 52 1.80 1.0000
1. I
  • 53 1.60 1.0000
  • 54 IA0 1.0000 0.0 2.0 4.0 6.0 8.0 10.0 12. O 55 1.20 1.0000 Core Height - feet
  • 56 1.00 1.0000
  • 57 0.80 1.0000 This Figure is rcrerred to by Specification B32.1
  • 58 0.60 1.0000
  • 59 0.40 1.0000 TI iese W(Z) values are consistent with Figure S, and are valid
  • 60 0.20 1.0000 th. TIPPF

-e .-- T.mz_..tem nera tueAne rm tn 527]4 F.

  • 61 0.00 1.0000

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevation MOL-2 Point (feet) W(Z)

1. 6
  • 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 1OAO 1.0000 I
  • 10 10.20 1.0000 11 10.00 1.2807 12 9.80 1.2691 13 9.60 1.2636 14 9.40 12564 15 9.20 1.2455 16 9.00 1.2362 17 8.80 1.2246
1. 18 8.60 1.2193 19 8.40 1.2223 20 8.20 1.2219 21 8.00 1.2246 22 7.80 1.2289 23 7.60 1.2299 24 7.40 1.2287 25 7.20 1.2250 26 7.00 12191 1.327 6.80 1.2113 28 6.60 1.2016 29 6.40 1.1906 A 30 6.20 1.1795

_ 31 6.00 1.1690 A 32 5.80 1.1618 33 5.60 1.1612 34 5.40 1.1668 A 35 5.20 1.1719

1. 2 _ - -_ _ 36 5.00 1.1758 37 4.80 1.1784 A 38 4.60 1.1798 39 4.40 1.1798 40 4.20 1.1785 41 4.00 1.1761 42 3.80 1.1723 43 3.60 1.1680 44 3.40 1.1642 1.145 3.20 1.1630 46 3.00 1.1675 47 2.80 1.1773 48 2.60 1.1870 49 2.40 1.1964 50 2.20 1.2056 51 2.00 1.2148
  • 52 1.80 1.0000
1.

_

  • 53 1.60 1.0000 0 0 2 .0 4 .0 6. 0 8 .0 10 .0 12 120*

0 54 55 1.40 1.20 1.0000 1.0000 Core Height - feet

  • 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(Z) values are consistent with Figure 5, and are valid
  • 60 0.20 1.0000 over the IIFP T.,1 temperature range from 586A to 587A'F. 61 0.00 1.0000
  • Top and Bottom 15% Excluded per Technical Spccirication B3.2.1 FIGURE 8 RAOC W(Z) AT 12000 MWDIMTU PAGE 13 of 14

COLR for VEGP UNIT 1 CYCLE 13 Axial Elevation EOL Point (feet) W(Z)

1. 6 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 1.5* 10 10.20 1.0000 11 10.00 1.2291 12 9.80 1.2263 13 9.60 1.2249 14 9A.0 1.2267 15 9.20 1.2374 16 9.00 1.2443 17 8.80 1.2508 1 4 18 8.60 1.2561 19 8.40 1.2618 20 8.20 1.2733 21 8.00 1.2810 22 7.80 1.2788 23 7.60 1.2896 24 7A0 1.2957 25 7.20 1.2986 26 7.00 1.2983

- 1.33 - 27 6.80 1.2950 28 6.60 1.2889 A 29 6.40 1.2802 AA 30 6.20 1.2691

. 31 6.00 1.2554 32 5.80 1.2420

&33 5.60 1.2339 34 5.40 1.2332 8 35 5.20 1.2361 1 .2 - 36 5.00 1.2378 37 4.80 1.2372 38 4.60 1.2345 39 4.40 1.2298 40 4.20 1.2229 41 4.00 1.2141 42 3.80 1.2033 43 3.60 1.1927 44 3A0 1.1833 1.1 45 3.20 1.1718 46 3.00 1.1820 47 2.80 1.1870 48 2.60 1.1987 49 2.40 1.2090 50 2.20 1.2193 51 2.00 1.2296

  • 52 1.80 1.0000 1 .0 _* 53 1.60 1.0000 0 .0 2 0 4 .0 6 0 8 0 10 .0 12. 0 554 1.20 1.0000 Core Height - feet
  • 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(Z) values are consistent with Figure 5, and are valid
  • 60 0.20 1.0000 over the HiFP T., temperature range from 586A to 587A°F.
  • 61 0.00 1.0000
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