ML023020285

From kanterella
Jump to navigation Jump to search
Cycle 10 Core Operating Limits Report
ML023020285
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 10/16/2002
From: Gasser J
Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
LCV-1639
Download: ML023020285 (16)
v • d • e


Text

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

40 Inverness Center Parkway Post Office Box 1295 Birmingham Alabama 35201 Tel 205.992.7721 Fax 205 992.0403 SOUTHERN October 16, 2002 COMPANY Energy to Serve Your World*

LCV-1639 Docket Nos: 50-424 50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Ladies and Gentlemen:

VOGTLE ELECTRIC GENERATING PLANT UNIT 2 CYCLE 10 CORE OPERATING LIMITS REPORT 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 10 Core Operating Limits Report (COLR).

Sincerely, J. T. Gasser JTG/RJF Attachment cc: Southern Nuclear Operating Company Mr. G. R. Frederick Mr. M. Sheibani SNC Document Management U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. F. Rinaldi, Vogtle Project Manager, NRR Mr. J. Zeiler, Senior Resident Inspector, Vogtle po\

VOGTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 2 CYCLE 10 CORE OPERATING LIMITS REPORT REVISION 0 OCTOBER 2002

COLR for VEGP UNIT 2 CYCLE 10 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 2 CYCLE 10 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 14

COLR for VEGP UNIT 2 CYCLE 10 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 BOL/ARO/HZP - MTC shall be less positive than +0.7 x 10.4 Ak/k/PF for power levels up to 70% RTP with a linear ramp to 0 Ak/kfF at 100% RTP.

The EOLIARO/RTP-MTC shall be less negative than -5.50 x 10.4 Akf/kfF.'

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/fF.1 The 60 ppm/ARO/RTP-MTC should be less negative than

-5.35 x 10-4 Ak/k/?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 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 586.4oF to 587.4oF.

PAGE 2 OF 14

COLR for VEGP UNIT 2 CYCLE 10 2.6 Heat Flux Hot Channel Factor - Fo(Z) (Specification 3.2.1)

RTP Fo 2.6.1 Fa(Z) <

  • K(Z) for P > 0.5 P

RTP Fa Fa(Z) < -

  • K(Z) for P:< 0.5

0.5 where

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

RTP 2.6.4 Fa(Z)! F< *K(Z) for P > 0.5 P *W(Z)

RTP Fa(Z) < _En

  • 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 Fa(Z) penalty factors are provided in Table 1.

PAGE 3 of 14

COLR for VEGP UNIT 2 CYCLE 10 2.7 Nuclear Enthalpy Rise Hot Channel Factor - F&H (Specification 3.2.2) 2.7.1 F~Hi F , (1 + PFAH

  • * (I-P))

where: P = THERMAL POWER RATED THERMAL POWER 2.7.2 , *H = 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 1810 ppm.1 1This concentration bounds the condition of keff 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.

s:\vogtle\ColACOLR.U2 PAGE 4 of 14

COLR for VEGP UNIT 2 CYCLE 10 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 Fo(Z) in accordance with SR 3.2.1.2, is the maximum factor by which Fo(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 Fa(Z) was determined.

PAGE 5 of 14

COLR for VEGP UNIT 2 CYCLE 10 Ann I 1- I 4-

'4. 00 1 ACCEPTABLE OPERATING REGION z

Z5 . (25000 3.1),o 001 z

3: (1600, 2.25)

<a wi 0

.00 2:

UNACCEPTABLE C3, OPERATING w

a- (950, 1.30) REGION cc An'i

.U!,J,P Ad* __ _ __ _ __ _ I _ _ _ _ _ _ _ I - I U UU 0 500 1000 1500 2000 2500 2175-1 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

COLR for VEGP UNIT 2 CYCLE 10 nt I I

(2500,4.90) 4.00 I __ _ __ _ _ i i I ACCEPTABLE OPERATING a) REGION z I _ WE___ i
4. i 3.00 25 (1250,.85) z 0

cr K~ ,4 9____________ i 2.00/

w I

aw1.00 I I

/

(460,1.00)

I I-UNACCEPTABLE OPERATING REGION ntnnrtI ________________ ________________ I 0 500 1000 1500 2000 2500 2175-1 RCS BORON CONCENTRATION (ppm)

FIGURE 2 REQUIRED SHUTDOWN MARGIN FOR MODES 4AND 5 (MODE 4 WITH NO REACTOR COOLANT PUMPS RUNNING)

PAGE 7 of 14

COLR for VEGP UNIT 2 CYCLE 10 (Fully Withdrawn *)

225 220 1 161) co

'a C:L

'I) z 0

Co 0

z 0

0 cc O N . I - -

0 20 40 60 80 100 1FuIIv Insertedf ....

J I POWER (percent 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 Umits 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 8 of 14

COLR for VEGP UNIT 2 CYCLE 10 1 40lu I IW r I I 1.20 a:

0 1.00 0.80 w

0.60 0z Fa 2.50 zy-CORE 0.40 HEIGHT K(Z) 0.000 1.000 6.000 1.000 12.000 0.925 0.20 0

0 2.0 4.0 6.0 8.0 10.0 12.0 CORE HEIGHT (ft)

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

COLR for VEGP UNIT 2 CYCLE 10 CD 0

0~

I

"-o wO~

a, w

0 0D 0.

50 AXIAL FLUX DIFFERENCE (percent Al)

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

COLR for VEGP UNIT 2 CYCLE 10 Axial Elevation BOL Point (feet) W(Z)

  • 1 12.00 1.0000
  • 2 11.80 1.0o00

°-3 11.60 1.0000

" 4 11.40 1.0000

  • 5 11.20 1.0000
  • 6 11.00 1.0000
  • 7 1080 1.0000
  • 8 10.60 1.0000

" 9 10.40 1.0000

" 10 10.20 1.0000 11 10.00 1.3331 12 980 1.2984 13 9.60 1.2789 14 9.40 1.2734 15 920 1.2625 16 900 1.2592 17 8.80 1.2636 18 8.60 1.2723 19 8.40 1.2170 20 820 1.2800 21 8.00 1.2794 22 7.80 1.2802 23 7.60 1.2801 24 7.40 1.2762

"- .. 25 7.20 1.2697 26 7.00 1.2609 27 6.80 1.2252 28 660 1.2127 29 6.40 1.1985 30 6.20 1.1828 31 6.00 1.1708 32 5.80 1.1662 33 5.60 1.1635 34 5.40 1.1638 35 5.20 1.1692 36 5.00 1.1783 37 4.80 1.1875 38 460 1.1957 39 4.40 1.2029 40 4.20 1.2090 41 400 1.2173 42 3.80 1.2231 43 360 1.2281 44 3.40 1.2316 45 3.20 1.2337 46 3.00 1.2390 47 280 1.2492 1 1 48 2.60 1.2612 49 2.40 1.2727 50 2.20 1.2881 51 200 1.3053 "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 - 54 1.40 1.0000

  • 55 1.20 1.0000 Core Height - feet " 56 1.00 1.0000

"* 57 0.80 1.0000 This figure Is referred to by Specification 33.32. 1 " 58 0.60 1.0000

" 59 0.40 1.0000 These W(Z) values are consistent with Figure 5 and are valid o 60 0.20 1.0000 0 61 0.00 1.0000 over the HFP Tavg temperature range from 586.4 to 587.4 F.

  • Top and Bottom 15% Excluded per Technical Specificaton 83 2.1 FIGURE 6 RAOC W(Z) AT150 MWD/MTU PAGE 11 of 14

COLR for VEGP UNIT 2 CYCLE 10 4

l:b Axial Elevation MOL-1 Point (feet) W(Z)

  • 1 1200 10000
  • 2 11 80 1.0000

- 3 1160 10000 4 1140 10000 5 11.20 1.0000

" 6 11.00 10000

  • 7 1080 10000 "8 1060 1.0000 9 1040 10000
  • 10 1020 10000 11 1000 1.3967 12 980 1.3673 13 960 1.3446 14 940 1.3272 15 920 13026 16 900 1 2783
1. 17 880 1 2633 18 8.60 1 2582 19 840 1 2560 20 820 1 2516 21 800 1.2518 22 780 1 2508 23 760 1.2464 24 7.40 12397 N 3 25 720 12309 i1. 26 7.00 12201 A 27 6.80 1.1958 28 660 1.1824

-i - ,1 29 6.40 1.1701 30 6.20 1.1617 31 600 1.1700 S*. A 32 580 1 1626 33 560 1.1566 34 540 1.1528 I 35 5.20 1 1573 I At 36 5.00 1.1634 A 37 4.80 1.1685 38 4.60 1.1731 39 4.40 1.1773 40 4.20 1 1819 41 4.00 1.1863 42 3.80 1.1922 1.1l 43 44 45 360 340 3.20 1.1967 1.2005 1.2056 46 3.00 1.2126 47 280 12250 48 2.60 1.2424 49 2.40 1.2600 50 2.20 1.2790 51 2.00 1.3003

" 52 1 80 1.0000

  • -53 160 1.0000 0.0 2.0 4.0 6.0 8.0 10.0 12.0 " 54 1.40 1.0000 "55 1.20 10000 Core Height - feet
  • 56 1.00 1.0000
  • 57 080 1.0000 This figure is referred to by Specification B3.2.1 " 58 060 1.0000

" 59 040 1.0000

" 60 0.20 1.0000 These W(Z) values are consistent with Figure 5 and ar-e valid

  • 61 0 00 1.0000 over the HFP Tavg temperature range from 586.4 to 5287.40F.

Top and Bottom 15% Excluded per Technical Specification B3 2.1 FIGURE 7 RAOC W(Z) at 4000 MWD/MTU PAGE 12 of 14

COLR for VEGP UNIT 2 CYCLE 10

.6 Axial Elevation MOL-2 Point (feet) W(Z)

  • 1 12.00 1.0000

" 2 11.80 1.0000

  • 3 1160 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 1.2757 12 9.80 1.2740 13 960 1.2701 14 9.40 1.2635 15 920 1.2563 16 9.00 1.2442 17 8.80 1.2380 18 8.60 1.2368 19 8.40 1.2404 20 8.20 1.2415 21 8.00 1.2457 22 7.80 1.2515 23 7.60 1.2535 24 7.40 1.2529

-1I . 25 7.20 1.2495 26 7.00 1.2437 27 6.80 1.2356 28 6.60 1.2254 29 640 1.2140 1.AAA 1 1 30 6.20 1.2024 AAAA 31 6.00 1.1887 A 32 5.80 1.1762 A4 33 5.60 1.1718 A 34 5.40 1.1771

.2- - -- 35 520 1.1833 36 5.00 1.1886 hAA 37 4.80 1.1926 38 4.60 1.1952 39 4.40 1.1964 40 4.20 1.1961 41 4.00 1.1944 42 3.80 1.1911 43 3.60 1.1871

  • 144 3.40 1.1836 45 3.20 1.1821 46 3.00 1.1834 47 2.80 1.1897 48 2.60 1.1991 49 2.40 1.2087 50 2.20 1.2182 51 2.00 1.2276

""52 1.80 1.0000

.0 53 1.60 1.0000 0.0 2.0 4.0 6.0 8.0 10.0 12.0 54 1.40 1.0000 "55 1.20 1.0000 Core Height - feet 56 1.00 1.0000

" 57 0.80 1.0000 Thls figure is referred to by Specification B3.2.1 " 58 0.60 1.0000

" 59 0.40 1.0000

  • 60 0.20 1.0000 "0

These W(Z) values are consistent with Figure 5 and are valid 0

  • 61 0.00 1.0000 ver the HFP Tavg temperature range from 586.4 to 587.4 F.

Top and Bottom 15% Excluded per Technical Specification B3.2.1 FIGURE 8 RAOC W(Z) AT 12000 MWD/MTU PAGE 13 of 14

COLR for VEGP UNIT 2 CYCLE 10 TILL ii]

1.i Axial Elevation EOL Point (feet) W(Z)

  • 1 1200 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
1.
  • 19t9t19 "8 10.60 1.0000
  • 9 10.40 1.0000

" 10 10.20 1.0000 11 10.00 1.2297 12 9.80 1.2271 13 9.60 1.2312 14 9.40 1.2309 15 9.20 1.2297 1.4 16 900 1.2348 17 880 1.2400 18 8.60 1.2451 19 840 1.2556 20 8.20 1.2726 21 800 1.2865 22 7.80 1.2853 23 7.60 1.2940 24 7.40 1.2995 N -,25 7.20 1,3020 1.3 AA A 26 7.00 1.3017 A A 27 6.80 1.2982 A 28 6.60 1.2936 29 6.40 1.2893 A A 30 620 1.2834 31 6.00 1.2758 "6AAA 32 5.80 1.2660 33 560 1.2573 A A 34 5.40 1.2539 35 520 1.2543 hA 36 5.00 1.2532 37 4.80 1.2514 38 4 60 1.2487 39 4.40 1.2434 40 4.20 1.2358 41 4 00 1.2260 42 3.80 1.2141 43 3.60 1.2008 44 3.40 1.1880 45 3.20 1.1776 46 3.00 1.1848 47 2.80 1.1865 48 2.60 1.1977 49 2.40 1.2078 50 2.20 1.2179 51 2.00 1.2281 1.0 - - - - - -

  • 52 "53 1.80 1.60 1.0000 1.0000 0.0 2.0 4.0 6.10 8.0 10.0 12.0 e 54 1.40 1.0000
  • 55 1.20 1.0000 Core Heigh t - feet 56 1.00 1.0000

" 57 0.80 1.0000 This figure is referred to by Sjpecification B3.2.1

  • 58 0.60 1.0000 59 0.40 1.0000
  • 60 0.20 1.0000 These W(Z) values are consistent w,Ith Figure 5 and are valid
  • 61 0.00 1.0000 over the HFP Tavg temperature ran ge from 586.4 to 587.4*F.

Top and Bottom 15% Excluded per Technical Specification B3.2.1 FIGURE 9 RAOC W(Z) AT 20000 MWD/MTU PAGE 14 of 14

Retrieved from "https://kanterella.com/w/index.php?title=ML023020285&oldid=2687209"