NL-24-0188, Cycle 33 Core Operating Limits Report

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Cycle 33 Core Operating Limits Report
ML24122C610
Person / Time
Site: Farley Southern Nuclear icon.png
Issue date: 05/01/2024
From: Coleman J
Southern Nuclear Operating Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
NL-24-0188
Download: ML24122C610 (1)
v • d • e


Text

~ Southern Nuclear May 1, 2024 Docket No.:

50-348 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Regulatory Affairs Joseph M. Farley Nuclear Plant - Unit 1 Cycle 33 Core Operating Limits Report Ladies and Gentlemen:

3535 Colonnade Parkway Birmingham, AL 35243 (205) 992-5000 NL-24-0188 In accordance with Technical Specification 5.6.5.d, Southern Nuclear Operating Company (SNC) submits the enclosed Core Operating Limits Report (COLR) for the Joseph M.

Farley Nuclear Plant (FNP) - Unit 1 Cycle 33 Version 1.

This letter contains no NRC commitments. If you have any questions, please contact Ryan Joyce at 205.992.6468.

Respectfully submitted,

~~

Jamie M. Coleman Regulatory Affairs Director JMC/was/cbg

Enclosure:

Core Operating Limits Report for FNP Unit 1 Cycle 33 Version 1 cc:

Regional Administrator, Region II NRR Project Manager - Farley Nuclear Plant Senior Resident Inspector - Farley Nuclear Plant RTYPE: CFA04.054

Joseph M. Farley Nuclear Plant - Unit 1 Cycle 33 Core Operating Limits Report Enclosure Core Operating Limits Report for FNP Unit 1 Cycle 33 Version 1

SOUTHERIIII<<\\

COMPANY Energy to Serve Your 'World~

Joseph M. Farley Nuclear Plant Core Operating Limits Report Unit 1 - Cycle 33 Version 1 January 2024

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for FNP UNIT 1 CYCLE 33 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 (with keff ~ 1)

The Technical Specifications affected by this report are listed below:

2.1.1 Reactor Core Safety Limits for THERMAL POWER 3.1.1 SHUTDOWN MARGIN - MODES 2 (withk0ff < 1), 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 - FfH 3.2.3 Axial Flux Difference 3.3.1 Reactor Trip System Instrumentation Overtemperature ~T (OT~T) and Overpower ~T (OP~T) Setpoint Parameter Values for Table 3.3.1-1 3.4.1 RCS DNB Parameters for Pressurizer Pressure, RCS Average Temperature, and RCS Total Flow Rate 3.9.1 Boron Concentration Page 1 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 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 as specified in Technical Specification 5.6.5.

2.1 2.2 SHUTDOWN MARGIN - MODES 1 and 2 (with k eff ~ 1.0) (Technical Requirement 13.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1. 77 percent &/k.

SHUTDOWN MARGIN - MODES 2 (with keff < 1.0), 3, 4 and 5 (Specification 3.1.1) 2.2.1 Modes 2 (keff < 1.0), 3 and 4 - The SHUTDOWN MARGIN shall be greater than or equal to 1. 77 percent &/k.

2.2.2 Mode 5 - The SHUTDOWN MARGIN shall be greater than or equal to 1.0 percent &/k.

Page 2 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 2.3 Moderator Temperature Coefficient (Specification 3.1.3) 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOL/ARO-MTC shall be less than or equal to +0.7 x 10-4 &/k/°F for power levels up to 70 percent RTP with a linear ramp to O &/k/°F at 100 percent RTP.

The EOL/ARO/RTP-MTC shall be less negative than -4.3 x 10-4 &/k/°F.

2.3.2 The MTC Surveillance limits are:

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

-3.65 X 10-4 &/k/°F.

The revised predicted near-EOL 300 ppm MTC shall be calculated using Figure 5 and the following algorithm:

Revised Predicted MTC Correction***

Predicted MTC* + AFD Correction** + Predictive

where,
  • Predicted MTC is calculated from Figure 5 at the bumup corresponding to the measurement of 300 ppm at RTP conditions,
    • AFD Correction is the more negative value of:

{O pcm/°F or (L'lAFD

  • AFD Sensitivity)}

where: L'lAFD is the measured AFD minus the predicted AFD from an incore flux map taken at or near the bumup corresponding to 300 ppm, AFD Sensitivity= 0.07 pcm/°F / L'lAFD

      • Predictive Correction is -3 pcm/°F.

The 100 ppm/ARO/RTP-MTC should be less negative than -4.0 x 10-4 Wk/°F.

where: BOL stands for Beginning of Cycle Life ARO stands for All Rods Out EOL stands for End of Cycle Life RTP stands for RATED THERMAL POWER Page 3 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 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 1.

2.6 Heat Flux Hot Channel Factor - FQ(z) (Specification 3.2.1) 2.6.1 F8(z):::; C:Q

  • K(z) for P > 0.5 for P ~0.5 where:

F8 (z) ::;; CFQ

  • K(z) 0.5 F8 (z) = F/f (z)
  • 1.0815_§ F/f (z) is the measured value of FQ(z)

THERMAL POWER P=--------

RATED THERMAL POWER 2.6.2 CFQ = 2.50 2.6.3 K(z) is provided in Figure 2.

2.6.4 Fl{ (z) ::;; C:Q

  • K(z) for P > 0.5 for P ~0.5 where:

Fl{ (z) ::;; CFQ

  • K(z) 0.5

[T(z)]COLR Fl{ (z) = [Fxy(z)]furv

  • P
  • Axy(z)
  • R1
  • 1.0815§

[T(z)]COLR Fl{ (z) = [Fxy(z)]furv * ---

  • Axy(z)
  • R1
  • 1.0815§ 0.5 and, [Fxy(z)]furv is the measured planar radial peaking factor.

for P > 0.5 for P ~0.5

§ 1.0815 is the uncertainty factor that accounts for fuel manufacturing tolerances (3%) and flux map measurement uncertainty (5%) and is only applicipable when using 2: 38 detector thimbles.

A bounding measurement uncertainty of7.0%, which is based on 25 thimbles, can be used for 2: 25 and < 38 detector thimbles, if desired.

Reference Technical Specification B 3.2.1-2.

Page 4 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Fi{ (z) evaluations are not applicable for axial core regions, measured in percent of core height:

a. Lower core region, from O to 8% inclusive,
b. Upper core region, from 92 to 100% inclusive,
c.

Grid plane regions, +/- 2% inclusive, and

d. Core plane regions, within+/- 2% of the bank demand position of the control banks.

2.6.5

[T(z)]COLR values are provided in Table 4-1 for ROSI and Table 4-2 for ROS2.

2.6.6 The Axy(z) factors adjust the surveillance to the reference conditions assumed m generating the [T(z)]C0 LR factors. Axy(z) may be assumed to equal 1.0 or may be determined for specific surveillance conditions using the approved methods listed in Technical Specification 5.6.5.

2.6. 7 The R1 penalty factors account for the potential decrease in transient FQ margin between surveillances. The R1 factors are provided in Table 1-1 for ROSI and Table 1-2 for ROS2.

2.6.8 Table 5 provides the required limits on THERMAL POWER and the required AFD reductions in the event that additional margin is required.

2.6.9 Either ROSI or ROS2 may be implemented at any time during the Cycle.

2.6.10 IfROSl is implemented and entering LCO 3.2.1 Condition B for Fi{ (z) not within limits, take Action B.1.1 by implementing ROS2.

2.6.11 If ROS2 is implemented and entering LCO 3.2.1 Condition B for Fi{ (z) not within limits, take Action B.2.1 by using Table 5 to determine required THERMAL POWER and AFD limits based on Required Fi{ (z) margin improvement available in ROS2.

2.7 Nuclear Enthalpy Rise Hot Channel Factor - FfH (Specification 3.2.2) 2.7.1 FfH::::; Ff//* (1 + PFLlH * (1-P))

where:

THERMAL POWER P=--------

2.7.2 Ff// = 1.70 2.7.3 PFLlH = 0.3 RATED THERMAL POWER Page 5 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 2.8 Axial Flux Difference (Specification 3.2.3) 2.8.1 The Axial Flux Difference (AFD) acceptable operation limits for each RAOC Operating Space (ROSI and ROS2), and corresponding Required Action (RAl and RA2) are provided in Figure 3.

2.9 Boron Concentration (Specification 3.9.1) 2.9.1 The boron concentration shall be greater than or equal to 2000 ppm.1 2.10 Reactor Core Safety Limits for THERMAL POWER (Specification 2.1.1) 2.10.1 In MODES 1 and 2, the combination of THERMAL POWER, Reactor Coolant System (RCS) highest loop average temperature, and pressurizer pressure shall not exceed the safety limits specified in Figure 4.

2.11 Reactor Trip System Instrumentation Overtemperature ll T (OT L'l T) and Overpower ll T (OP L'l T)

Setpoint Parameter Values for Table 3.3.1-1 (Specification 3.3.1) 2.11.1 The Reactor Trip System Instrumentation Overtemperature ll T (OT L'l T) and Overpower llT (OP!lT) setpoint parameter values for TS Table 3.3.1-1 are listed in COLR Tables 2 and 3.

2.12 RCS DNB Parameters for Pressurizer Pressure, RCS Average Temperature, and RCS Total Flow Rate (Specification 3.4.1) 2.12.1 RCS DNB parameters for pressurizer pressure, RCS average temperature, and RCS total flow rate shall be within the limits specified below:

a.

Pressurizer pressure ;:::: 2209 psig;

b. RCS average temperature s 580.3°F; and
c.

The minimum RCS total flow rate shall be ;:::: 273,900 GPM when using the precision heat balance method and ;:::: 274,800 GPM when using the elbow tap method.

This concentration bounds the condition of k eff s 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 10 depletion.

Page 6 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Table 1-1 Rj Margin Decrease Factors for ROSl Cycle Burnup Ri Cycle Burnup Ri Cycle Burnup Ri (MWD/MTU)

(MWD/MTU)

(MWD/MTU)

S 150 1.0061 7213 1.0020 14277 1.0060 358 1.0220 7421 1.0050 14484 1.0054 565 1.0381 7629 1.0078 14692 1.0049 773 1.0501 7837 1.0110 14900 1.0043 981 1.0580 8044 1.0136 15108 1.0030 1189 1.0604 8252 1.0117 15315 1.0023 1396 1.0588 8460 1.0098 15523 1.0018 1604 1.0536 8668 1.0080 15731 1.0013 1812 1.0484 8875 1.0063 15939 1.0009 2020 1.0441 9083 1.0044 16146 1.0005 2227 1.0391 9291 1.0031 16354 1.0003 2435 1.0342 9499 1.0024 16562 1.0001 2643 1.0286 9706 1.0020 16770 1.0000 2851 1.0233 9914 1.0016 16977 1.0000 3058 1.0186 10122 1.0012 17185 1.0000 3266 1.0142 10330 1.0009 17393 1.0000 3474 1.0101 10537 1.0005 17601 1.0000 3682 1.0055 10745 1.0002 17808 1.0000 3889 1.0028 10953 1.0000 18016 1.0000 4097 1.0010 11161 1.0038 18224 1.0000 4305 1.0024 11368 1.0062 18432 1.0000 4513 1.0095 11576 1.0071 18639 1.0000 4720 1.0123 11784 1.0078 18847 1.0000 4928 1.0115 11992 1.0084 19055 1.0000 5136 1.0097 12199 1.0090 19263 1.0000 5344 1.0091 12407 1.0096 19470 1.0005 5551 1.0057 12615 1.0100 19678 1.0009 5759 1.0042 12823 1.0097 19886 1.0013 5967 1.0030 13030 1.0078 20094 1.0017 6175 1.0021 13238 1.0075 2: 20301 1.0018 6382 1.0016 13446 1.0077 6590 1.0013 13653 1.0073 6798 1.0013 13861 1.0069 7006 1.0000 14069 1.0065 Notes:
1.

The Burnup Dependent Transient FQ Margin Decrease Factor Rj, to be applied to FQ(Z) in accordance with Technical Specification Surveillance Requirement (SR) 3.2.1.2, is the maximum factor by which FQ (Z) is expected to increase over a 39 Effective Full Power Day (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. Values may be interpolated to the surveillance cycle burnup.

Page 7 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Table 1-2 R j Margin Decrease Factors for ROS2 Cycle Burnup Ri Cycle Burnup Ri Cycle Burnup Ri (MWD/MTU)

(MWD/MTU)

(MWD/MTU)

S 150 1.0042 7213 1.0000 14277 1.0016 358 1.0174 7421 1.0000 14484 1.0008 565 1.0315 7629 1.0000 14692 1.0002 773 1.0429 7837 1.0000 14900 1.0000 981 1.0540 8044 1.0000 15108 1.0000 1189 1.0580 8252 1.0000 15315 1.0000 1396 1.0582 8460 1.0000 15523 1.0000 1604 1.0565 8668 1.0002 15731 1.0000 1812 1.0517 8875 1.0015 15939 1.0000 2020 1.0442 9083 1.0000 16146 1.0000 2227 1.0381 9291 1.0000 16354 1.0000 2435 1.0318 9499 1.0000 16562 1.0000 2643 1.0227 9706 1.0008 16770 1.0000 2851 1.0166 9914 1.0005 16977 1.0000 3058 1.0117 10122 1.0002 17185 1.0000 3266 1.0077 10330 1.0000 17393 1.0000 3474 1.0048 10537 1.0000 17601 1.0000 3682 1.0041 10745 1.0000 17808 1.0000 3889 1.0056 10953 1.0007 18016 1.0000 4097 1.0045 11161 1.0051 18224 1.0000 4305 1.0036 11368 1.0158 18432 1.0000 4513 1.0073 11576 1.0209 18639 1.0000 4720 1.0085 11784 1.0227 18847 1.0000 4928 1.0090 11992 1.0236 19055 1.0000 5136 1.0087 12199 1.0240 19263 1.0000 5344 1.0075 12407 1.0239 19470 1.0000 5551 1.0031 12615 1.0232 19678 1.0000 5759 1.0015 12823 1.0220 19886 1.0000 5967 1.0004 13030 1.0135 20094 1.0000 6175 1.0000 13238 1.0109 2: 20301 1.0000 6382 1.0000 13446 1.0084 6590 1.0000 13653 1.0062 6798 1.0000 13861 1.0043 7006 1.0000 14069 1.0028 Notes:
1.

The Burnup Dependent Transient FQ Margin Decrease Factor Rj, to be applied to FQ(Z) in accordance with Technical Specification Surveillance Requirement (SR) 3.2.1.2, is the maximum factor by which FQ (Z) is expected to increase over a 39 Effective Full Power Day (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 F Q ( Z) was determined.

2. Values may be interpolated to the surveillance cycle burnup.

Page 8 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Table 2 Reactor Trip System Instrumentation - Overtemperature AT (OTAT)

Setpoint Parameter Values T's 577.2°F

., ~ 30 sec

  • 4= 0 sec fi(L'll) =

P' = 2235 psig K2 = 0.01 7 /°F K3 = 0.000825/psi

  • 2 s 4 sec
  • s s 6 sec

-2.48 {23 + (q1 - qb)}

0% ofRTP 2.05 {(q1 - qb) - 15}

when (q1 - qb) s -23% RTP when -23% RTP < (q1 -qb) s 15% RTP when (q1 - qb) > 15% RTP Page 9 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Table 3 Reactor Trip System Instrumentation - Overpower AT (OPAT)

Setpoint Parameter Values T" ::::; 577.2°F IGi=l.10 T3 ~ 10 sec T4= 0 sec Ts::::; 6 sec

  • 6::::; 6 sec Ks = 0.02/°F for increasing Tavg Ks = 0/°F for decreasing T avg f2(~1) = 0% RTP for all ~I Ki,= 0.00109/°F when T > T" K6 = 0/°F when T ::::; T" Page 10 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Axial Elevation 150 Table 4-1

[T(z)f0 LR Factors for ROSl 1000 2000 3000 4000 Point (feet)

MWD/MTU MWD/MTU MWD/MTU MWD/MTU MWD/MTU 1

12.00 1.0000 1.0000 1.0000 1.0000 1.0000 2

11.80 1.0000 1.0000 1.0000 1.0000 1.0000 3

11.60 1.0000 1.0000 1.0000 1.0000 1.0000 4

11.40 1.0000 1.0000 1.0000 1.0000 1.0000 5

11.20 1.0000 1.0000 1.0000 1.0000 1.0000 6

11.00 1.1502 1.0922 1.03 12 0.9913 0.9876 7

10.80 1.1288 1.0900 1.035 1 1.0005 1.0016 8

10.60 1.1662 1.1400 1.0977 1.0659 1.0695 9

10.40 1.2329 1.2154 1.1778 1.1534 1.1570 10 10.20 1.2396 1.2380 1.2082 1.2064 1.1960 11 10.00 1.2011 1.1992 1.1870 1.1992 1.1810 12 9.80 1.2184 1.2129 1.2089 1.2285 1.2085 13 9.60 1.2830 1.2809 1.2777 1.2994 1.2794 14 9.40 1.2858 1.2836 1.2806 1.3088 1.2958 15 9.20 1.2347 1.2450 1.2433 1.263 1 1.2554 16 9.00 1.2152 1.2283 1.2272 1.2494 1.2399 17 8.80 1.2734 1.2882 1.2863 1.3086 1.3097 18 8.60 1.3292 1.3413 1.3400 1.3636 1.3741 19 8.40 1.3185 1.3320 1.3359 1.3614 1.3709 20 8.20 1.2775 1.2920 1.3045 1.3279 1.3386 21 8.00 1.3307 1.3456 1.3642 1.3854 1.3952 22 7.80 1.37 13 1.3866 1.4105 1.4301 1.4391 23 7.60 1.3399 1.3560 1.3842 1.4035 1.4127 24 7.40 1.2810 1.2976 1.3289 1.3484 1.3582 25 7.20 1.2933 1.3 109 1.3439 1.3640 1.3733 26 7.00 1.3465 1.3661 1.3988 1.4200 1.4278 27 6.80 1.3533 1.3747 1.4060 1.4287 1.4358 28 6.60 1.2919 1.3 151 1.3442 1.3693 1.3770 29 6.40 1.2651 1.2898 1.3165 1.3436 1.3512 30 6.20 1.3105 1.3367 1.3642 1.3889 1.3949 31 6.00 1.2995 1.3270 1.3558 1.3778 1.3834 32 5.80 1.2333 1.2613 1.2910 1.3105 1.3 166 33 5.60 1.1847 1.2159 1.2432 1.258 1 1.2644 34 5.40 1.2162 1.2536 1.2905 1.3094 1.3 132 35 5.20 1.2557 1.2906 1.328 1 1.347 1 1.3503 36 5.00 1.2520 1.2847 1.3226 1.3424 1.3459 37 4.80 1.2473 1.2790 1.3170 1.3375 1.3414 38 4.60 1.2513 1.2826 1.3203 1.3412 1.3452 39 4.40 1.2621 1.2926 1.3297 1.3507 1.3547 40 4.20 1.2453 1.2745 1.3104 1.33 14 1.3358 41 4.00 1.1909 1.2182 1.25 19 1.2729 1.2783 42 3.80 1.1897 1.2151 1.2469 1.2675 1.2730 43 3.60 1.2373 1.2610 1.2911 1.3107 1.3 153 44 3.40 1.2466 1.2676 1.295 1 1.3 142 1.3 180 45 3.20 1.2310 1.2491 1.2728 1.2883 1.2939 46 3.00 1.2300 1.2489 1.2670 1.2823 1.2889 47 2.80 1.2441 1.2676 1.2814 1.2926 1.3018 48 2.60 1.2562 1.2849 1.2998 1.3034 1.3 163 49 2.40 1.2340 1.2624 1.2774 1.2737 1.2905 50 2.20 1.1975 1.2200 1.2345 1.2284 1.2435 51 2.00 1.2364 1.2521 1.2647 1.2549 1.2664 52 1.80 1.2947 1.3023 1.311 7 1.2968 1.3040 53 1.60 1.3084 1.3064 1.3111 1.2910 1.2935 54 1.40 1.2906 1.2787 1.278 1 1.2532 1.2510 55 1.20 1.2754 1.2489 1.2415 1.2109 1.2036 56 1.00 1.2925 1.2524 1.2334 1.1908 1.1747 57 0.80 1.0000 1.0000 1.0000 1.0000 1.0000 58 0.60 1.0000 1.0000 1.0000 1.0000 1.0000 59 0.40 1.0000 1.0000 1.0000 1.0000 1.0000 60 0.20 1.0000 1.0000 1.0000 1.0000 1.0000 61 000 1.0000 1.0000 1.0000 1.0000 1.0000 Notes (per Technical Specification B 3.2.1-11):

l.

Top and bottom 5 Axial Points (8%) are excluded.

January 2024 5000 6000 MWD/MTU MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0028 0.9971 1.0246 1.0212 1.0970 1.0936 1.1868 1.1820 1.2255 1.2195 1.2036 1.2133 1.2249 1.2437 1.2949 1.3125 1.3019 1.3218 1.2667 1.2785 1.25 16 1.2629 1.3067 1.3164 1.3564 1.3668 1.3537 1.3635 1.3245 1.3309 1.38 10 1.3826 1.4245 1.4223 1.3992 1.3956 1.3462 1.3427 1.3595 1.3553 1.4101 1.405 1 1.4154 1.4113 1.3570 1.3553 1.3340 1.3303 1.3782 1.3704 1.3694 1.3593 1.3072 1.2966 1.2616 1.2502 1.2973 1.2824 1.3374 1.3214 1.3358 1.3201 1.3325 1.3175 1.3372 1.3228 1.3476 1.3339 1.3304 1.3184 1.2756 1.2675 1.2714 1.2682 1.3 169 1.3147 1.3270 1.3234 1.3 107 1.307 1 1.2973 1.3010 1.3027 1.3087 1.3 160 1.3245 1.2912 1.3029 1.2451 1.2596 1.2672 1.2837 1.3029 1.3205 1.2907 1.3091 1.2468 1.2655 1.1970 1.2146 1.1625 1.1763 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000

2. Axial points within +/- 2% of the active core height of a grid location or a bank demand position are excluded.

Page 11 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Axial Elevation Point (feet)

I 12.00 2

11.80 3

11.60 4

11.40 5

11.20 6

11.00 7

10.80 8

10.60 9

10.40 10 10.20 II 10.00 12 9.80 13 9.60 14 9.40 15 9.20 16 9.00 17 8.80 18 8.60 19 8.40 20 8.20 21 8.00 22 7.80 23 7.60 24 7.40 25 7.20 26 7.00 27 6.80 28 6.60 29 6.40 30 6.20 31 6.00 32 5.80 33 5.60 34 5.40 35 5.20 36 5.00 37 4.80 38 4.60 39 4.40 40 4.20 41 4.00 42 3.80 43 3.60 44 3.40 45 3.20 46 3.00 47 2.80 48 2.60 49 2.40 50 2.20 51 2.00 52 1.80 53 1.60 54 1.40 55 1.20 56 1.00 57 0.80 58 0.60 59 0.40 60 0.20 61 000 8000 MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0440 1.0662 1.1378 1.2240 1.2579 1.2325 1.2449 1.2975 1.3080 1.2717 1.2617 1.3165 1.3631 1.3565 1.3225 1.368 1 1.4024 1.3743 1.3217 1.3308 1.3748 1.3781 1.3239 1.2988 1.3343 1.3227 1.2636 1.2229 1.25 13 1.2820 1.2798 1.2778 1.2861 1.2994 1.2882 1.2434 1.2456 1.2916 1.3054 1.2952 1.2953 1.3174 1.3400 1.3238 1.2868 1.3153 1.355 1 1.3468 1.3057 1.255 1 1.2123 1.0000 1.0000 1.0000 1.0000 1.0000 Table 4-1 (Continued)

[T(z)f0 LR Factors for ROSl 10000 12000 14000 MWD/MTU MWD/MTU MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0898 1.1206 1.1577 1.1089 1.1396 1.1 709 1.1 752 1.2006 1.2267 1.2579 1.2775 1.2927 1.2882 1.3022 1.3 120 1.2599 1.2702 1.2772 1.268 1 1.2735 1.2763 1.3148 1.3135 1.3 172 1.3084 1.3134 1.3 176 1.2584 1.2693 1.2741 1.2303 1.2464 1.2583 1.2662 1.2848 1.2969 1.2977 1.3208 1.3270 1.2957 1.3166 1.3 181 1.2673 1.2875 1.288 1 1.3 112 1.3282 1.3254 1.3442 1.3580 1.3533 1.3 198 1.3323 1.3294 1.2725 1.2846 1.2853 1.2812 1.2906 1.2935 1.3214 1.3265 1.3309 1.3248 1.3269 1.3338 1.2753 1.2770 1.2887 1.252 1 1.2531 1.2680 1.2889 1.2861 1.2978 1.2837 1.2781 1.2876 1.2343 1.2281 1.2368 1.1964 1.1898 1.1995 1.2337 1.2304 1.2322 1.2656 1.2626 1.2598 1.2640 1.2630 1.2567 1.262 1 1.2612 1.2532 1.2705 1.2680 1.2580 1.2837 1.2791 1.2674 1.2738 1.2684 1.2562 1.2325 1.2281 1.2 170 1.2360 1.2303 1.2 180 1.2793 1.2705 1.2549 1.292 1 1.2803 1.2678 1.2849 1.2724 1.2646 1.2884 1.2803 1.2653 1.3 134 1.3056 1.2844 1.3392 1.3303 1.3 135 1.3283 1.3211 1.3 11 3 1.2977 1.2976 1.2963 1.3302 1.3274 1.3322 1.3730 1.3708 1.3815 1.3693 1.3705 1.3896 1.3332 1.3394 1.3676 1.2859 1.2966 1.3330 1.2427 1.2559 1.2988 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 Notes (per Technical Specification B 3.2.1-11):

l.

Top and bottom 5 Axial Points (8%) are excluded.

January 2024 16000 18000 MWD/MTU MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.1868 1.2206 1.1930 1.2203 1.2443 1.2619 1.3049 1.3168 1.3 159 1.3235 1.2761 1.2820 1.2696 1.2727 1.2974 1.2965 1.2923 1.2907 1.2494 1.2600 1.2278 1.2442 1.2622 1.2802 1.2845 1.302 1 1.2758 1.2894 1.2568 1.2738 1.2981 1.3165 1.3297 1.3492 1.3115 1.3335 1.2732 1.2978 1.2829 1.3083 1.3 196 1.3446 1.3235 1.3482 1.2814 1.3063 1.2611 1.285 1 1.2873 1.308 1 1.2802 1.2983 1.2367 1.2540 1.2082 1.2242 1.2428 1.2589 1.2702 1.2838 1.2687 1.2797 1.2652 1.2724 1.2672 1.2714 1.2733 1.2728 1.2593 1.2549 1.2187 1.2120 1.2160 1.2047 1.2487 1.2355 1.2570 1.2456 1.2475 1.2364 1.2505 1.2443 1.2787 1.2746 1.3 103 1.3065 1.3 121 1.3111 1.3024 1.3056 1.3419 1.3474 1.3950 1.403 1 1.4093 1.4229 1.3948 1.4153 1.3676 1.3952 1.3404 1.3757 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000

2.

Axial points within +/- 2% of the active core height of a grid location or a bank demand position are excluded.

Page 12 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Axial Elevation 150 Table 4-2

[T(z)f0 LR Factors for ROS2 1000 2000 3000 4000 Point (feet)

MWD/MTU MWD/MTU MWD/MTU MWD/MTU MWD/MTU 1

12.00 1.0000 1.0000 1.0000 1.0000 1.0000 2

11.80 1.0000 1.0000 1.0000 1.0000 1.0000 3

11.60 1.0000 1.0000 1.0000 1.0000 1.0000 4

11.40 1.0000 1.0000 1.0000 1.0000 1.0000 5

11.20 1.0000 1.0000 1.0000 1.0000 1.0000 6

11.00 1.0762 1.0611 1.0064 0.9577 0.9465 7

10.80 1.0611 1.0576 1.0244 0.9818 0.9633 8

10.60 1.1035 1.1065 1.0760 1.0365 1.0264 9

10.40 1.1698 1.1803 1.1408 1.1120 1.1066 10 10.20 1.188 1 1.1999 1.1 701 1.1469 1.1446 11 10.00 1.1492 1.1567 1.1425 1.1416 1.1260 12 9.80 1.1670 1.1703 1.1528 1.1713 1.1564 13 9.60 1.2309 1.2360 1.2209 1.2418 1.2322 14 9.40 1.2356 1.2388 1.2368 1.2540 1.2534 15 9.20 1.1884 1.2018 1.1939 1.2135 1.2142 16 9.00 1.1720 1.1858 1.1 82 1 1.2034 1.1979 17 8.80 1.2329 1.2462 1.2439 1.2659 1.2548 18 8.60 1.2911 1.3033 1.3025 1.3256 1.3095 19 8.40 1.2818 1.2956 1.2982 1.3238 1.3 101 20 8.20 1.2435 1.2588 1.2652 1.2925 1.2853 21 8.00 1.2972 1.3 132 1.3215 1.3500 1.3449 22 7.80 1.3388 1.3556 1.3660 1.3952 1.3918 23 7.60 1.3101 1.3280 1.3414 1.3710 1.3703 24 7.40 1.2545 1.2733 1.2893 1.3191 1.3208 25 7.20 1.2690 1.2888 1.307 1 1.3366 1.3382 26 7.00 1.3238 1.3459 1.3662 1.3940 1.3937 27 6.80 1.333 1 1.3574 1.3797 1.4052 1.4035 28 6.60 1.2753 1.3015 1.3259 1.3495 1.3476 29 6.40 1.25 17 1.2795 1.3057 1.327 1 1.3247 30 6.20 1.2996 1.3293 1.3568 1.375 1 1.3741 31 6.00 1.2919 1.3230 1.35 18 1.3674 1.3695 32 5.80 1.2291 1.2607 1.2904 1.3039 1.3 101 33 5.60 1.1835 1.2155 1.2462 1.2558 1.2667 34 5.40 1.2140 1.2474 1.2840 1.3029 1.3008 35 5.20 1.2428 1.2779 1.3 192 1.3373 1.3381 36 5.00 1.2372 1.2718 1.3 128 1.3289 1.3324 37 4.80 1.2297 1.2624 1.303 1 1.3173 1.3239 38 4.60 1.23 10 1.2641 1.3042 1.3162 1.3255 39 4.40 1.2390 1.2709 1.3101 1.3197 1.33 18 40 4.20 1.2201 1.2504 1.2879 1.2956 1.3 104 41 4.00 1.1647 1.1925 1.2276 1.2334 1.25 14 42 380 1.1615 1.1869 1.2 198 1.2249 1.2436 43 3.60 1.2059 1.2291 1.2596 1.2654 1.2824 44 3.40 1.2133 1.2333 1.2629 1.2665 1.2827 45 3.20 1.1944 1.2119 1.2422 1.2430 1.2561 46 3.00 1.1912 1.2085 1.23 12 1.2390 1.2433 47 2.80 1.2078 1.2226 1.23 13 1.2497 1.2497 48 2.60 1.2242 1.2397 1.2401 1.2607 1.2595 49 2.40 1.2029 1.2181 1.2 143 1.2332 1.2308 50 2.20 1.1636 1.1777 1.1686 1.1858 1.1823 51 2.00 1.1976 1.2091 1.1924 1.2069 1.2004 52 1.80 1.2501 1.2581 1.2322 1.243 1 1.2324 53 1.60 1.2620 1.2626 1.2275 1.2338 1.2194 54 1.40 1.2441 1.2364 1.1930 1.1945 1.1767 55 1.20 1.2287 1.2081 1.1559 1.1516 1.1298 56 1.00 1.2444 1.2119 1.1445 1.1302 1.1008 57 0.80 1.0000 1.0000 1.0000 1.0000 1.0000 58 0.60 1.0000 1.0000 1.0000 1.0000 1.0000 59 0.40 1.0000 1.0000 1.0000 1.0000 1.0000 60 0.20 1.0000 1.0000 1.0000 1.0000 1.0000 61 000 1.0000 1.0000 1.0000 1.0000 1.0000 Notes (per Technical Specification B 3.2.1-11):

l.

Top and bottom 5 Axial Points (8%) are excluded.

January 2024 5000 6000 MWD/MTU MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9587 0.9820 0.9752 1.0008 1.0427 1.0703 1.1242 1.1538 1.1624 1.1880 1.1439 1.1652 1.1687 1.1 825 1.2383 1.2509 1.2477 1.2635 1.2168 1.2259 1.205 1 1.2148 1.263 1 1.2720 1.3177 1.3274 1.3149 1.3249 1.2844 1.2950 1.3377 1.3472 1.3796 1.3879 1.3562 1.3641 1.3066 1.3 146 1.323 1 1.3295 1.3783 1.3812 1.3904 1.3903 1.3395 1.3380 1.3200 1.3 165 1.3671 1.3596 1.3619 1.352 1 1.3035 1.2932 1.2607 1.2497 1.2911 1.2777 1.3235 1.3070 1.3 192 1.2999 1.3 128 1.2947 1.3 144 1.2972 1.3218 1.3055 1.3023 1.2887 1.2465 1.2383 1.2401 1.2369 1.2827 1.2795 1.2898 1.2855 1.2701 1.2660 1.2571 1.2599 1.253 1 1.2646 1.2569 1.2677 1.2291 1.2410 1.1807 1.1963 1.1975 1.2 153 1.2271 1.2466 1.2121 1.2326 1.1678 1.1 887

1. 1185 1.1387 1.0841 1.1008 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000
2.

Axial points within +/- 2% of the active core height of a grid location or a bank demand position are excluded.

Page 13 of20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Axial Elevation Point (feet)

I 12.00 2

11.80 3

11.60 4

11.40 5

11.20 6

11.00 7

10.80 8

10.60 9

10.40 10 10.20 II 10.00 12 9.80 13 9.60 14 9.40 15 9.20 16 9.00 17 8.80 18 8.60 19 8.40 20 8.20 21 8.00 22 7.80 23 7.60 24 7.40 25 7.20 26 7.00 27 6.80 28 6.60 29 6.40 30 6.20 31 6.00 32 5.80 33 5.60 34 5.40 35 5.20 36 5.00 37 4.80 38 4.60 39 4.40 40 4.20 41 4.00 42 3.80 43 3.60 44 3.40 45 3.20 46 3.00 47 2.80 48 2.60 49 2.40 50 2.20 51 2.00 52 1.80 53 1.60 54 1.40 55 1.20 56 1.00 57 0.80 58 0.60 59 0.40 60 0.20 61 000 8000 MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 0.9904 1.0132 1.0812 1.1633 1.1967 1.1739 1.1873 1.2385 1.2470 1.2106 1.1958 1.2469 1.2947 1.2904 1.2638 1.3123 1.3494 1.3261 1.2787 1.2904 1.3354 1.3416 1.2916 1.2699 1.3111 1.3067 1.2550 1.2182 1.25 17 1.2815 1.2755 1.2673 1.2684 1.2754 1.2611 1.2145 1.2141 1.2546 1.2641 1.2525 1.2489 1.2624 1.2795 1.2597 1.2205 1.2436 1.2774 1.2662 1.2247 1.1748 1.1327 1.0000 1.0000 1.0000 1.0000 1.0000 Table 4-2 (Continued)

[T(z)f0 LR Factors for ROS2 10000 12000 14000 MWD/MTU MWD/MTU MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.052 1 1.0795 1.108 1 1.0703 1.0953 1.1180 1.1338 1.1543 1.1675 1.2101 1.2224 1.2305 1.2388 1.2423 1.2492 1.2 11 3 1.2123 1.2 165 1.2192 1.2168 1.2 162 1.2639 1.2675 1.2545 1.2625 1.2705 1.2569 1.2234 1.2294 1.2 174 1.2043 1.2155 1.2046 1.2492 1.2573 1.2444 1.2897 1.2920 1.2755 1.2861 1.2866 1.2691 1.2600 1.2577 1.2435 1.305 1 1.2981 1.2828 1.3393 1.3290 1.3 131 1.3 161 1.3062 1.2928 12701 1.2621 1.2524 1.2799 1.2720 1.2629 1.3211 1.3 125 1.3024 1.3248 1.3 176 1.3083 1.2753 1.2727 1.2666 1.252 1 1.2530 1.2486 1.2887 1.2861 1.2804 1.2835 1.2781 1.2730 1.2340 1.2281 1.2255 1.198 1 1.1912 1.1906 1.2232 1.2159 1.2 174 1.2476 1.2442 1.2406 1.2457 1.2402 1.2355 1.2425 1.2356 1.2291 1.2466 1.2376 1.2304 1.2564 1.2449 1.2357 1.2441 1.2313 1.2210 1.2013 1.1893 1.1 794 1.2022 1.1887 1.1 778 1.2422 1.2245 1.2 148 1.2505 1.2338 1.2260 1.2407 1.2235 1.2 180 1.2405 1.2287 1.2201 1.2567 1.2491 1.2434 1.2767 1.2676 1.2688 1.2618 1.2547 1.2639 1.2286 1.2252 1.2469 1.2553 1.2532 1.2790 1.2919 1.2908 1.3241 1.2850 1.2878 1.3298 1.2482 1.2563 1.3072 1.2014 1.2143 1.2728 1.1590 1.1747 1.2391 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 Notes (per Technical Specification B 3.2.1-11):

l.

Top and bottom 5 Axial Points (8%) are excluded.

January 2024 16000 18000 MWD/MTU MWD/MTU 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.1354 1.1523 1.1458 1.158 1 1.1966 1.2025 1.2556 1.2544 1.2671 1.2663 1.2298 1.23 18 1.2245 1.2278 1.2635 1.2555 1.2586 1.2423 1.2167 1.1999 1.1948 1.1891 1.2411 1.2353 1.2742 1.2745 1.2656 1.2709 1.2420 1.25 19 1.2797 1.2918 1.3088 1.323 1 1.2898 1.3076 1.2517 1.273 1 1.2622 1.2853 1.3003 1.3238 1.3076 1.3307 1.2696 1.2932 1.2537 1.2766 1.285 1 1.3050 1.2787 1.2966 1.2336 1.2507 1.2000 1.2156 1.2328 1.2492 1.255 1 1.2722 1.2481 1.2669 1.2395 1.2586 1.2407 1.2565 1.2448 1.2570 1.2297 1.2387 1.1887 1.1957 1.1850 1.1880 1.2145 1.211 8 1.2177 1.2108 1.2055 1.1950 1.2003 1.1925 1.2190 1.211 8 1.2487 1.2394 1.2493 1.2413 1.2393 1.2355 1.2759 1.2744 1.3254 1.3262 1.3381 1.3440 1.3235 1.3359 1.2968 1.3159 1.2702 1.2965 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000

2.

Axial points within +/- 2% of the active core height of a grid location or a bank demand position are excluded.

Page 14 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Table 5 Required THERMAL POWER Limits and AFD Reductions RAOC Operating Space Required FQw(z) Margin Required THERMAL Required AFD Improvement (%)

POWER Limit (%RTP)

Reduction ROSI

> O

< 50 NIA

S 0.5
S 95 ROS2

> 0.5 and :S 2.7

S 90 See Figure 3

> 2.7

< 50 Page 15 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Figure 1 Rod Bank Insertion Limits versus Rated Thermal Power 225 200 175

~,

I/

~,

~ (0, 114) 50 25 0

0.0 I.I 0.1 Fully Withdrawn - 225 to 231 steps, inclusive I

I I

I I

1..;

(.552, 225)

~

BankC

~

I/

~

I~

,, BankD I/

I~

I~

~r'

(.070, 0)

I I

I I

I 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Fraction of RATED THERMAL POWER January 2024 (1, 187) =

~

I/

I/

0.9 1.0 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 128 steps.

Page 16 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 Figure 2 K(Z)-Normalized FQ(Z) as a Function of Core Height 1.2 1

1-,

0....

C,i C:

r-,

0.8 0JI C

2 C:

~

~

"0

~

-~ -; s 0.6 1-,

0 z I

Core Height (ft.)

K(Z)

N

~

0.000 1.000 6.000 1.000 12.000 1.000 0.4 FQ =2.50 0.2 0

0 2

4 6

8 10 12 Core Height (feet)

Page 17 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 January 2024 110 90 -

10 0

-50 Figure 3 Axial Flux Difference Limits as a Function of Rated Thermal Power for ROSl, ROS2, RAl and RA2

/1

'I

\\ '

\\

..........\\ \\

UNACCEPTABLE UNACCEPTABLE

...__ y

\\.\\

OPERATION I

OPERATION

/

I I

\\

//

\\J\\

ACCEPTABLE

--ROSl 7~-

\\

I OPERATION

- - - ROS2 11 I

\\

\\

/;

\\.\\

                • RAl
  • -RA2 Power ROSI ROS2 Power RAl Power RA2

(% RIP) AFD Limit AFDLimit

(%RIP) AFD Limit

(%RIP) AFDLimit

(%)

(%)

(%)

(%)

50

-25

-22 50

-22 50

-22 100

-12

-9 95

-10.3 90

-11.6 100 9

6 95 7.5 90 9

50 24 21 50 21 50 21

-40

-30

-20

-10 0

10 20 30 40 Axial Flux Difference (Delta I) %

50 Page 18 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Figure 4 Reactor Core Safety Limits 680 UNACCEPTABLE 660 OPERATION IA-........ --

le..

r---. ~

640

...... i"----

~i"----

~ r---.

~ '

,- r---.

~.........

\\.

r---.

~

r---.

\\

I._ r---.

................. \\

\\

['...

i"----

600

~.........

~.........

~..............

ACCEPTABLE 580 OPERATION 560 0

0.2 0.4 0.6 0.8 1

Power (Fraction of RATED THERMAL POWER)

\\

\\

r-..

\\ \\

- I\\ I\\

\\

i\\ ~

I\\ \\

I *

......... i. i\\

\\ \\

11.

11

\\

J 1.2 January 2024

.....,_..2425 psig

-2235psig

-a--1985 psig

-+-1831 psig Page 19 of 20

CORE OPERATING LIMITS REPORT, FNP UNIT 1 CYCLE 33 Figure 5 Predicted HFP 300 ppm MTC versus Cycle Burnup

+I i:::

(I)

  • r-1

- 24. 0 o - 24. 5

  • r-1 11-1 11-1 (I) 0 u (I) 1-1 E n1 1-1

[ - 25. 0 m

E-1 1-1 0

+I n1 1-1

~

j

- 25. 5 15000 r-,.. r-,...._

r--.....

16000 Cycle Cycle Burnup

{MWD/MTU) 15000 16000 17000 18000 19000

~

...... ' " ~

17000 18000 Burnup (MWD/MTU)

Moderator Temperature Coefficient {J!cm/°F}

-24.17

-24.39

-24.64

-24.89

-25.10 January 2024 r-,........

19000 Page 20 of20

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