WBL-23-008, Unit 1 Revision 1 of the Cycle 18 Core Operating Limits Report (COLR) and Units 2 Revision 1 of the Cycle 5 Core Operating Limits Report (COLR)

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Unit 1 Revision 1 of the Cycle 18 Core Operating Limits Report (COLR) and Units 2 Revision 1 of the Cycle 5 Core Operating Limits Report (COLR)
ML23038A069
Person / Time
Site: Watts Bar  Tennessee Valley Authority icon.png
Issue date: 02/07/2023
From: Anthony Williams
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
WBL-23-008
Download: ML23038A069 (1)
v • d • e


Text

Post Office Box 2000, Spring City, Tennessee 37381-2000 WBL-23-008 February 7, 2023 10 CFR 50.4 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Units 1 and 2 Facility Operating License Nos. NPF-90 and NPF-96 NRC Docket Nos. 50-390 and 50-391

Subject:

UNIT 1 REVISION 1 OF THE CYCLE 18 CORE OPERATING LIMITS REPORT (COLR) AND UNIT 2 REVISION 1 OF THE CYCLE 5 CORE OPERATING LIMITS REPORT (COLR)

Pursuant to Watts Bar Nuclear Plant Technical Specifications (Tech Spec) Section 5.9.5.d, Tennessee Valley Authority (TVA) has enclosed Revision 1 of the Unit 1 Cycle 18 CORE OPERATING LIMITS REPORT (COLR) and Revision 1 of the Unit 2 Cycle 5 CORE OPERATING LIMITS REPORT (COLR). The analytical methods used to determine the core operating limits were previously reviewed and approved by the NRC.

There are no regulatory commitments contained in this letter or the enclosure. Should you have questions regarding this submittal, please contact Jonathan Johnson at jtjohnson0@tva.gov .

Respectfully, Anthony L. Williams, IV Site Vice President Watts Bar Nuclear Plant

U.S. Regulatory Commission Page 2 WBL-23-008 February 7, 2023

Enclosures:

Watts Bar Nuclear Plant, Unit 1, Cycle 18 Core Operating Limits Report, Revision 1, January 2023 Watts Bar Nuclear Plant, Unit 2, Cycle 5 Core Operating Limits Report, Revision 1, January 2023 cc (Enclosure):

NRC Regional Administrator - Region II NRR Project Manager NRC Senior Resident Inspector

ENCLOSURE 1 Watts Bar Nuclear Plant, Unit 1, Cycle 18 Core Operating Limits Report Revision 1 January 2023

QA Record L36 230109 800 WATTS BAR NUCLEAR PLANT, UNIT 1, CYCLE 18 CORE OPERATING LIMITS REPORT Revision 1 January2023 Digitally signed by Sharper, Nathaniel Trevon ON: dc=gov, dc=tva, dc=main, ou=Main, ou=Corporate, ou=Users, Prepared by: cn=sharper, Nathaniel Trevon, emailntsharper@itva.gov Reason: lam the author of this document Date: 2023.01.10 07:50:41 -0500' N. Trevon Sharper, PWR Fuel Engineering Date

'.1 en fie -1 h Digitally signed by Porter, Mark Donald ON: dc=gov. dc=tva, dc=main, ou=Main, ou=Corporate, ou=Users, Porter, IVl a r k Don a I d Date: 2023.01.10 08:12:18 -0500 Mark D. Porter, PWR Fuel Engineering Date Reviewed by:

Digitally signed by Ritchie, John A Rit : Ii I e, J c I-i ri /\ Date: 2023.01.1009:55:54 -0500

/

John A. Ritchie, Manager, PWR Fuel Engineering Date Digitally signed by Mack, Bryan Thomas Mack, Bryan Thomas Date: 2023.01.11 09:28:3 1 -05'OO' I

Bryan T. Mack, Manager, Reactor Engineering Date Approved by:

PORC Chairman i 4 I Date Jo / I I? 3/?3 Plant Manager Date of PORC Affected Revision Approval Pages Reason for Revision 0 10/25/2021 All Initial issue Verification of BOL and EOL MTC in lieu of 1 See Above 2 measurement Unit I Cycle 18 WATTS BAR Page 1 of 13 Revision 1

1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Watts Bar Unit 1 Cycle 18 has been prepared in accordance with the requirements of the Technical Specifications 5.9.5.

The Technical Specifications affected by this report are listed below:

3.1.4 Moderator Temperature Coefficient (MTC) 3.1.5 Rod Group Alignment Limits 3.1.6 Shutdown Bank Insertion Limits 3.1.7 Control Bank Insertion Limits 3.2.1 Heat Flux Hot Channel Factor (FQ(Z))

3.2.2 Nuclear Enthalpy Rise Hot Channel Factor (FAUN) 3.2.3 Axial Flux Difference (AFD) 3.9.1 Boron Concentration 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 the NRC approved methodologies specified in the Technical Specifications Section 5.9.5.

The following abbreviations are used in this section:

BOL --

Beginning of Cycle Life ARO --

All Rods Out HZP --

Hot Zero Thermal Power EOL --

End of Cycle Life RTP --

Rated Thermal Power ROS --

RAOC Operating Space RA --

Required Action 2.1 MODERATOR TEMPERATURE COEFFICIENT MTC (LCO 3.1.4) -

2.1.1 The MTC limits are:

The ARO/HZP MTC shall be less positive than or equal to 0 Ak/k/°F (upper limit).

With the BOL/ARO/HZP MTC more positive than -1.785 x 10-5 Ak/k/°F (BOL MTC limit), establish control rod withdrawal limits to ensure the MTC remains less positive than or equal to 0 Ak!k/°F (upper limit) for all times in core life.

The EOL/ARO/RTP MTC shall be less negative than or equal to

-4.5 x 10-4 ikfk/°F (lower limit).

2.1.2 The 300 ppm surveillance limit is:

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

-3.75 x 10-4 iXk/kl°F.

Unit 1 Cycle 18 WATTS BAR Page 2 of 13 Revision 1

2.1.3 The 60 ppm surveillance limit is:

The measured 60 ppm /ARO/RTP-MTC should be less negative than or equal to

-4.28 x 10-4 Ak/k/°F.

2.2 SHUTDOWN MARGIN SDM (LCO 3.1.5, 3.1.6, 3.1.7) 2.2.1 For IS 3.1.5, SDM shall be? 1.6% Ak/k in MODE 1 and MODE 2.

2.2.2 For TS 3.1.6, SDM shall be? 1.6% Ak/k in MODE 1 and MODE 2.

2.2.3 For IS 3.1.7, SDM shall be? 1.6% Ak/k in MODE 1 and MODE 2 with keff? 1.0.

2.3 SHUTDOWN BANK INSERTION LIMITS (LCO 3.1.6) 2.3.1 The shutdown banks shall be withdrawn to a position greater than or equal to 225 steps withdrawn.

2.4 CONTROL BANK INSERTION LIMITS (LCO 3.1.7) 2.4.1 The control banks are fully withdrawn or shall be limited in physical insertion as shown in Figure 1.

2.4.2 Each control bank shall be considered fully withdrawn from the core at greater than or equal to 225 steps.

2.4.3 The control banks shall be operated in sequence by withdrawal of Bank A, Bank B, Bank C, and Bank D. The control banks shall be sequenced in reverse order upon insertion.

2.4.4 Each control bank not fully withdrawn from the core shall be operated with the following overlap as a function of park position.

Park Position (steps) Bank Overlap (steps) Bank Difference (steps) 225 109 116 226 110 116 227 111 116 228 112 116 229 113 116 230 114 116 231 115 116 Unit 1 Cycle 18 WAITS BAR Page 3 of 13 Revision 1

2.5 HEAT FLUX HOT CHANNEL FACTOR FQ(Z) (LCO 3.2.1) -

FQ(Z) ~ [CFQI P1

  • K(Z) for P > 0.5 FQ(Z) ~ [CFQI 0.5]
  • K(Z) for P 0.5 Where P =

Thermal Power / Rated Thermal Power 2.5.1 CFQ=2.50 2.5.2 K(Z) is provided in Figure 2.

2.5.3 F(z) = 1.03 *F (Z)*(1+2.)

where 1.03 is the fuel manufacturing tolerance, F' (Z) is the measured value of FQ (Z) and UQ is the measurement uncertainty (UQ ~ 5).

2.5.4 Ft" (Z) equations [T(Z)]

are:

F(Z) E 1.03 *

  • Ay(Z)
  • F(Z)
  • R1 *

(i + ) for P > 0.5

[T(Z)]COI F"(Z) E 1.03 *

  • A(Z)
  • F(Z)
  • R1 (i +
  • for P ~ 0.5 Where (Z) is the measured planar radial peaking factor.

F" (Z) evaluations are not applicable for axial core regions, measured in percent of core height:

a. Lower core region, from 0 to 10% inclusive,
b. Upper core region, from 90 to 100% inclusive,
c. Grid plane regions, +2% inclusive, and
d. Core plane regions, within 2% of the bank demand positions of the control banks.

2.5.5 [T(Z)]co values are provided in Tables A.1 and A.2 for ROS 1 and ROS 2, respectively.

2.5.6 A(Z) factors adjust the surveillance to the reference conditions assumed in generating the [T(Z)]Co factors. A(Z) may be assumed to be equal to 1.0 or may be determined for specific surveillance conditions using the approved methods listed inTS 5.9.5.

2.5.7 The R1 penalty factors account for the potential decrease in transient FQ margin between surveillances. The R factors for ROS 1 and ROS 2 are provided in Tables A.3 and A.4 respectively.

2.5.8 Table A.5 provides the required limits on THERMAL POWER and the required AFD reductions for each ROS in the event that additional margin is required.

Unit 1 Cycle 18 WATTS BAR Page 4 of 13 Revision 1

2.6 NUCLEAR ENTIL&LPY RISE HOT CHANNEL FACTOR F1 -

(LCO 3.2.2)

FN~FHRTP*(1+PF *(14)))

where P Thermal Power / Rated Thermal Power

=

FAHRTP =

1.65 for RFA-2 fuel, and PF =0.3 2.7 AXIAL FLUX DIFFERENCE AFD (LCO 3.2.3) 2.7.1 The AFD limits for RAOC operating spaces (ROS 1 and ROS 2) and corresponding AFD reduction limits (RA- 1 and RA-2) are provided in Figure 3.

2.8 REFUELING BORON CONCENTRATION (LCO 3.9.1) 2.8.1 The refueling boron concentration shall be ~ 2300 ppm.

3.0 NUMBER OF TPBARS IN REACTOR CORE (TS 4.2.1) 3.0.1 There are 1792 tritium producing burnable absorber rods (TPBARs) in the reactor core for Cycle 18.

Unit 1 Cycle 18 WATTS BAR Page 5 of 13 Revision 1

250 BANK A (ALL POWERS, 225)

J 225 0.197,225), (0.703, 225)

(1.0, 177) 175 I (0.0, 180)

I-150 LU I.-

I,) BANKC 125 I -

(I, 0 .

UJ I -

(I, z BANK D 0

(0.0, 64) 50 -

25 (0.227, 0) 0 0.0 0.2 0.4 0.6 0.8 1.0 FRACTION OF RATED THERMAL POWER Figure 1 Control Bank Insertion Limits Versus Thermal Power Four Loop Operation Note: Fully withdrawn region shall be the condition where shutdown and control banks are at a position within the interval of ~ 225 and ~ 231 steps withdrawn.

Unit 1 Cycle 18 WATTS BAR Page 6 of 13 Revision 1

1.2 1.1 1

0.9 0.8 I-0.7 0.6 Core Height K(Z) -

C, N

0.000 1.000 E 6.000 1.000

- 0.5 0 12.000 1.000 z

0.4 0.3 0.2 0.1 0

0 1 2 3 4 5 6 7 8 9 10 11 12 Core Height (feet)

Figure 2 K(Z) Normalized FQ(Z) as a Function of Core Height Unit 1 Cycle 18 WATTS BAR Page 7 of 13 Revision 1

110 100 Unacceptable Operation

/ \

I Unacceptable Operation 90 I -- / / ROS 1 I . /

I..,

80 I .- /

RA -1 I,, :- /

/

I..,

---ROSZ

/ -1 70 AcceptableOperation RA-2 7:, /

60

// /-

1,'

50 40 ROSI ROS2 RA-1 RA-2 Power AFOLimit AFDLimit Power AFD Limit AFD Limit

(% RTP) (%) (%) (% RTP) (%) (%)

50 -28 -24 50 -26 -22 100 -12 -8 90 -13 -9 100 7 7 90 8 8 20 50 21 21 50 19 19 I0 0

30 -25 -30 -15 -10 -5 0 5 10 15 30 Axial Flux Difference (LXI %)

Figure 3 Axial Flux Difference Acceptable Operation Limits as a function of Rated Thermal Power (RAOC)

Unit 1 Cycle 18 WATTS BAR Page 8 of 13 Revision 1

Table A.1

[T(Z)]co Factors for ROS 1 Height (ft) 150 MWD/MTU 3000 MWDIMTU 8000 MWD/MTU 12000 MI?\TDIMTU 14000 MWD/MTU 16000 MWDIMTU 12.0720 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.8708 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.6696 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.4684 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.2672 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.0660 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 10.8648 0.9698 0.9097 0.9554 1.0244 1.0980 1.1189 10.6636 1.0360 0.9842 1.0399 1.1049 1.1758 1.1881 10.4624 1.1394 1.0921 1.1519 1.2129 1.2810 1.2803 10.2612 1.1704 1.1343 1.1926 1.2455 1.2939 1.2980 10.0600 1.1272 1.1067 1.1607 1.2042 1.2316 1.2466 9.8588 1.1477 1.1389 1.1834 1.2238 1.2342 1.2490 9.6576 1.2327 1.2307 1.2762 1.2972 1.2980 1.3055 9.4564 1.2487 1.2510 1.2978 1.3067 1.3101 1.3039 9.2552 1.1994 1.1995 1.2435 1.2490 1.2516 1.2427 9.0540 1.1787 1.1795 1.2193 1.2194 1.2206 1.2130 8.8528 1.2622 1.2671 1.2947 1.2880 1.2866 1.2768 8.6516 1.3204 1.3276 1.3495 1.3341 1.3300 1.3178 8.4504 1.2928 1.3058 1.3278 1.3068 1.3049 1.2950 8.2492 1.2350 1.2564 1.2774 1.2514 1.2514 1.2445 8.0480 1.3041 1.3293 1.3367 1.3013 1.2996 1.2914 7.8468 1.3649 1.3946 1.3873 1.3409 1.3382 1.3283 7.6456 1.3333 1.3693 1.3555 1.3065 1.3050 1.2960 7.4444 1.2590 1.3008 1.2847 1.2376 1.2378 1.2310 7.2432 1.2862 1.3304 1.3032 1.2494 1.2484 1.2409 7.0420 1.3704 1.4132 1.3687 1.3034 1.2998 1.2901 6.8408 1.3916 1.4330 1.3778 1.3069 1.2986 1.2886 6.6396 1.3252 1.3669 1.3141 1.2470 1.2351 1.2267 6.4384 1.3103 1.3505 1.2939 1.2264 1.2135 1.2003 6.2372 1.3982 1.4316 1.3594 1.2816 1.2644 1.2426 6.0360 1.4172 1.4489 1.3642 1.2841 1.2646 1.2397 5.8348 1.3507 1.3834 1.3015 1.2241 1.2106 1.1868 5.6336 1.3002 1.3337 1.2538 1.1791 1.1737 1.1441 5.4324 1.3774 1.4107 1.3163 1.2318 1.2277 1.1893 5.2312 1.4302 1.4612 1.3617 1.2682 1.2654 1.2241 5.0300 1.4214 1.4516 1.3561 1.2627 1.2618 1.2208 4.8288 1.4122 1.4412 1.3510 1.2590 1.2591 1.2176 4.6276 1.4157 1.4429 1.3572 1.2669 1.2663 1.2277 4.4264 1.4298 1.4544 1.3730 1.2862 1.2826 1.2450 4.2252 1.4059 1.4289 1.3579 1.2791 1.2733 1.2389 4.0240 1.3213 1.3443 1.2916 1.2277 1.2212 1.1930 3.8228 1.3155 1.3351 1.2925 1.2375 1.2281 1.2034 3.6216 1.3831 1.3986 1.3587 1.3036 1.2878 1.2644 3.4204 1.3924 1.4080 1.3786 1.3312 1.3100 1.2901 3.2192 1.3700 1.3812 1.3681 1.3342 1.3139 1.2966 3.0180 1.3617 1.3612 1.3642 1.3421 1.3254 1.3099 2.8168 1.3676 1.3597 1.3768 1.3666 1.3514 1.3385 2.6156 1.3792 1.3636 1.3996 1.4009 1.3888 1.3790 2.4144 1.3372 1.3187 1.3728 1.3931 1.3879 1.3831 2.2132 1.2480 1.2284 1.3013 1.3424 1.3460 1.3559 2.0120 1.2606 1.2331 1.3220 1.3818 1.3924 1.4002 1.8108 1.2940 1.2563 1.3595 1.4377 1.4555 1.4690 1.6096 1.2426 1.1993 1.3153 1.4135 1.4410 1.4631 1.4084 1.1616 1.1140 1.2377 1.3517 1.3883 1.4191 1.2072 1.0950 1.0411 1.1692 1.2978 1.3436 1.3835 1.0060 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.8048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.6036 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.4024 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.2012 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unit 1 Cycle 18 WATTS BAR Page 9 of 13 Revision 1

Table A.2

[T(Z)]co Factors for ROS 2 Height (ft) 150 MWIJIMTU 3000 MWDIMTU 8000 MWD/MTU 12000 MWIJIMTU 14000 MWDIMTU 16000 MWD/MTU 12.0720 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.8708 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.6696 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.4684 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.2672 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.0660 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 10.8648 0.9566 0.9097 0.9554 1.0244 1.0787 1.0847 10.6636 1.0278 0.9842 1.0399 1.1049 1.1526 1.1524 10.4624 1.1363 1.0922 1.1519 1.2129 1.2507 1.2433 10.2612 1.1705 1.1337 1.1926 1.2455 1.2748 1.2623 10.0600 1.1272 1.1020 1.1607 1.2042 1.2287 1.2144 9.8588 1.1477 1.1285 1.1834 1.2238 1.2342 1.2238 9.6576 1.2327 1.2186 1.2762 1.2972 1.2980 1.2857 9.4564 1.2448 1.2396 1.2978 1.3067 1.3101 1.2849 9.2552 1.1895 1.1939 1.2435 1.2490 1.2516 1.2357 9.0540 1.1637 1.1800 1.2194 1.2187 1.2206 1.2135 8.8528 1.2417 1.2670 1.2931 1.2816 1.2866 1.2766 8.6516 1.2948 1.3276 1.3452 1.3264 1.3300 1.3178 8.4504 1.2685 1.3057 1.3235 1.3022 1.3049 1.2950 8.2492 1.2167 1.2564 1.2719 1.2485 1.2514 1.2445 8.0480 1.2860 1.3255 1.3294 1.2997 1.2994 1.2914 7.8468 1.3474 1.3863 1.3781 1.3402 1.3371 1.3283 7.6456 1.3176 1.3577 1.3448 1.3064 1.3028 1.2960 7.4444 1.2456 1.2867 1.2729 1.2376 1.2349 1.2310 7.2432 1.2735 1.3147 1.2894 1.2494 1.2447 1.2409 7.0420 1.3586 1.3977 1.3526 1.3034 1.2954 1.2901 6.8408 1.3808 1.4193 1.3560 1.3069 1.2935 1.2886 6.6396 1.3165 1.3560 1.2959 1.2470 1.2322 1.2267 6.4384 1.3035 1.3423 1.2794 1.2264 1.2111 1.2003 6.2372 1.3929 1.4301 1.3491 1.2816 1.2623 1.2429 6.0360 1.4132 1.4490 1.3604 1.2841 1.2633 1.2370 5.8348 1.3476 1.3834 1.3002 1.2241 1.2051 1.1848 5.6336 1.2966 1.3314 1.2533 1.1791 1.1574 1.1433 5.4324 1.3702 1.4009 1.3143 1.2317 1.2041 1.1891 5.2312 1.4172 1.4442 1.3543 1.2672 1.2377 1.2206 5.0300 1.4035 1.4294 1.3439 1.2593 1.2300 1.2129 4.8288 1.3876 1.4126 1.3340 1.2526 1.2237 1.2064 4.6276 1.3879 1.4111 1.3352 1.2562 1.2272 1.2092 4.4264 1.3968 1.4176 1.3459 1.2691 1.2397 1.2205 4.2252 1.3688 1.3884 1.3264 1.2561 1.2279 1.2089 4.0240 1.2821 1.3023 1.2573 1.1999 1.1755 1.1587 3.8228 1.2724 1.2892 1.2541 1.2033 1.1801 1.1632 3.6216 1.3311 1.3480 1.3103 1.2603 1.2357 1.2165 3.4204 1.3357 1.3544 1.3238 1.2783 1.2548 1.2374 3.2192 1.3125 1.3261 1.3100 1.2743 1.2544 1.2385 3.0180 1.3002 1.3025 1.3025 1.2755 1.2587 1.2444 2.8168 1.3048 1.2995 1.3081 1.2970 1.2818 1.2696 2.6156 1.3132 1.3031 1.3240 1.3269 1.3134 1.3043 2.4144 1.2714 1.2580 1.2962 1.3144 1.3057 1.3016 2.2132 1.1847 1.1697 1.2260 1.2626 1.2608 1.2639 2.0120 1.1951 1.1735 1.2430 1.2959 1.2988 1.3072 1.8108 1.2253 1.1955 1.2757 1.3446 1.3524 1.3664 1.6096 1.1754 1.1412 1.2322 1.3190 1.3345 1.3569 1.4084 1.0979 1.0602 1.1577 1.2590 1.2821 1.3125 1.2072 1.0342 0.9909 1.0922 1.2067 1.2376 1.2766 1.0060 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.8048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.6036 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.4024 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.2012 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unit 1 Cycle 18 WATTS BAR Page 10 of 13 Revision 1

Table A.3 Rj Margin Decrease Factors for ROS 1 Cycle Burnup R Cycle Burnup R1 Cycle Burnup R (MWD/MTU) ____________

(MWDIMTU) _________

(MWD/MTU) ____________

~150 1.0050 7733 1.0077 15316 1.0021 340 1.0130 7923 1.0069 15506 1.0020 529 1.0194 8112 1.0062 15696 1.0019 719 1.0235 8302 1.0054 15885 1.0019 908 1.0254 8492 1.0056 16075 1.0018 1098 1.0247 8681 1.0048 16264 1.0017 1287 1.0220 8871 1.0041 16454 1.0019 1477 1.0179 9060 1.0034 16643 1.0023 1667 1.0134 9250 1.0046 16833 .0028 1856 1.0091 9439 1.0066 17023 1.0033 2046 1.0085 9629 1.0086 17212 1.0038 2235 1.0073 9819 1.0106 17402 1.0043 2425 1.0057 10008 1.0116 17591 1.0048 2615 1.0039 10198 1.0135 17781 1.0053 2804 1.0021 10387 1.0154 17971 1.0055 2994 1.0008 10577 1.072 18160 1.0053 3183 1.0001 10766 1.0169 18350 1.0052 3373 1.0000 10956 1.0158 ~18539 1.0050 3562 1.0006 11146 1.0147 ______________ _____________

3752 1.0011 11335 1.0136 _______________ ______________

3942 1.0013 11525 1.0116 _______________ ______________

4131 1.0014 11714 1.0106 _______________ ______________

4321 1.0012 11904 1.0097 _______________ ______________

4510 1.0010 12094 1.0088 _______________ ______________

4700 1.0007 12283 1.0080 ________________ _______________

4890 1.0003 12473 1.0073 ______________ _____________

5079 1.0001 12662 1.0066 ______________ _____________

5269 1.0000 12852 1.0061 _______________ ______________

5458 1.0000 13041 1.0064 ________________

5648 1.0054 13231 1.0059 ________________ _______________

5837 1.0074 13421 1.0055 _______________ ______________

6027 1.0095 13610 1.0050 _______________ ______________

6217 1.0117 13800 1.0045 ______________ ______________

6406 1.0135 13989 1.0041 _______________ ______________

6596 1.0137 14179 1.0037 _______________

6785 1.0125 14369 1.0033 ________________ _______________

6975 1.0114 14558 1.0029 _______________

7164 1.0104 14748 1.0027 _______________

7354 1.0095 14937 1.0025 ________________ _______________

7544 1.0086 15127 1.0023 ________________ _______________

Unit 1 Cycle 18 WATTS BAR Page 11 of 13 Revision 1

Table A.4 Rj Margin Decrease Factors for ROS 2 Cycle Burnup R Cycle Burnup R Cycle Burnup R (MWD/MTU) ___________

(MWD/MTU) ________

(MWD/MTU) ____________

~150 1.0114 7733 1.0000 15316 1.0038 340 1.0136 7923 1.0000 15506 1.0035 529 1.0148 8112 1.0000 15696 1.0032 719 1.0158 8302 1.0019 15885 1.0029 908 1.0167 8492 1.0066 16075 1.0026 1098 1.0173 8681 1.0066 16264 1.0024 1287 1.0173 8871 1.0059 16454 1.0023 1477 1.0168 9060 1.0052 16643 1.0021 1667 1.0156 9250 1.0046 16833 1.0020 1856 1.0138 9439 1.0041 17023 1.0018 2046 1.0115 9629 1.0036 17212 1.0019 2235 1.0091 9819 1.0032 17402 1.0024 2425 1.0067 10008 1.0003 17591 1.0029 2615 1.0046 10198 1.0012 17781 1.0034 2804 1.0027 10387 1.0026 17971 1.0039 2994 1.0013 10577 1.0039 18160 1.0044 3183 1.0004 10766 1.0052 18350 1.0050 3373 1.0000 10956 1.0064 ~18539 1.0055 3562 1.0000 11146 1.0075 _______________

3752 1.0000 11335 1.0086 _______________ ______________

3942 1.0000 11525 1.0079 _______________

4131 1.0000 11714 1.0063 _______________

4321 1.0000 11904 1.0048 _______________

4510 1.0000 12094 1.0035 _______________

4700 1.0000 12283 1.0025 _______________ _______________

4890 1.0001 12473 1.0020 _______________

5079 1.0004 12662 1.0017 _______________

5269 1.0001 12852 1.0015 _______________

5458 1.0000 13041 1.0038 _______________

5648 1.0001 13231 1.0038 _______________

5837 1.0000 13421 1.0039 _______________

6027 1.0000 13610 1.0040 _______________

6217 1.0000 13800 1.0041 ____________

6406 1.0000 13989 1.0042 _______________ ______________

6596 1.0000 14179 1.0043 _______________ ______________

6785 1.0000 14369 1.0044 _______________ ______________

6975 1.0000 14558 1.0045 _______________

7164 1.0000 14748 1.0044 ______________

7354 1.0000 14937 1.0042 _______________

7544 1.0000 15127 1.0040 _______________

Unit 1 Cycle 18 WATTS BAR Page 12 of 13 Revision 1

Table A.5 Required THERMAL POWER Limits and AFD Reductions RAOC Required THERMAL Required FQW(Z) Margin Required AFD Operating POWER Limit Improvement (%) Reduction Space (%RTP)

ROS I ~5.2 ~90 See Figure 3 RA-1

>5.2 <50 N/A ROS 2 ~5.8 ~90 See Figure 3 RA-2

>5.8 <50 N/A Unit 1 Cycle 18 WATTS BAR Page 13 of 13 Revision 1

ENCLOSURE 2 Watts Bar Nuclear Plant, Unit 2, Cycle 5 Core Operating Limits Report Revision 1 January 2023

QA Record L36 230109 801 WATTS BAR NUCLEAR PLANT, UNIT 2, CYCLE 5 CORE OPERATING LIMITS REPORT Revision 1 January 2023 Digitally signed by Sharper, Nathaniel Trevon lJI.:f.fE_L Prepared by: ON: dc=gov, dc=tva, dc=n,ain, ou=Main, ou=Corporate, ou=Users, crrSharper, Nathaniel Trevon, email=ntsharper@tva.gov Reason: lam the authorof this document Date: 2023.01 .1007:55:21 -0500' N. Trevon Sharper, PWR Fuel Engineering Date Verified bv Digitally signed by Porter. Mark Donald ON: dc=gov. dc=tva, dc=main, ou=Main, ou=Corporate, ou=Users, Porter, WI a r k Don a I d ReV Date: 2023.01.1008:13:28 -0500 Mark D. Porter, PWR Fuel Engineering Date Reviewed by: Digitally signed by Ritchie, John A Ritc Ii I e, J 0 Ii ri A DN: dc=gov, dc=tva, dc=main, ou=Mair,, ou=Corporate, ou=lJsers, cn=Ritchie, John A, email=jaritchieo@tva.gov Reason: I have reviewed this document Date: 2023.01.10 10:09:27 -0500' John A. Ritchie, Manager, PWR Fuel Engineering Date Digitally signed by Mack, Bryan Thomas Mack, Bryan Thomas Date: 2023.01.11 09:27:5 7 -05'OO' I

Bryan T. Mack, Manager, Reactor Engineering Date Approved by:

/ II? 3/ ?

Plant Manager Date Date of PORC Affected Revision Approval Pages Reason for Revision 0 04/18/2022 All Initial issue Verification of BOL and EOL MTC in lieu of I See Above 2 measurement Unit 2 Cycle 5 WATTS BAR Page 1 ofl3 Revision 1

1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Watts Bar Unit 2 Cycle 5 has been prepared in accordance with the requirements of the Technical Specifications (TS) 5.9.5.

The Technical Specifications affected by this report are listed below:

3.1.4 Moderator Temperature Coefficient (MTC) 3.1.5 Rod Group Alignment Limits 3.1.6 Shutdown Bank Insertion Limits 3.1.7 Control Bank Insertion Limits 3.2.1 Heat Flux Hot Channel Factor (FQ(Z))

3.2.2 Nuclear Enthalpy Rise Hot Channel Factor (FN) 3.2.3 Axial Flux Difference (AFD) 3.9.1 Boron Concentration 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 the NRC approved methodologies specified in the Technical Specifications Section 5.9.5.

The following abbreviations are used in this section:

BOL --

Beginning of Cycle Life ARO --

All Rods Out HZP --

Hot Zero Thermal Power EOL --

End of Cycle Life RTP --

Rated Thermal Power ROS --

RAOC Operating Space RA --

Required Action 2.1 MODERATOR TEMPERATURE COEFFICIENT MTC (LCO 3.1.4) -

2.1.1 The MTC limits are:

The ARO/HZP MTC shall be less positive than or equal to 0 Ak/k/°F (upper limit).

With the BOL/ARO/HZP MTC more positive than -2.561 x l0 Ak/k/°F (BOL MTC limit), establish control rod withdrawal limits to ensure the MTC remains less positive than or equal to 0 z\klkl°F (upper limit) for all times in core life.

The EOL/ARO/RTP MTC shall be less negative than or equal to

-4.50 x lO Ak/kl°F (lower limit).

2.1.2 The 300 ppm surveillance limit is:

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

-3.75 x iO Ak/k/°F.

Unit 2 Cycle 5 WATTS BAR Page 2 of 13 Revision 1

2.1.3 The 60 ppm surveillance limit is:

The measured 60 ppm /ARO/RTP-MTC should be less negative than or equal to

-4.28 x io- Ak/kl°F.

2.2 SHUTDOWN MARGIN -

SDM (LCO 3.1.5, 3.1.6, 3.1.7) 2.2.1 For TS 3.1.5, SDM shall be? 1.6% Ak/k in MODE 1 and MODE 2.

2.2.2 For TS 3.1.6, SDM shall be? 1.6% Ak/k in MODE 1 and MODE 2.

2.2.3 For TS 3.1.7, SDM shall be? 1.6% Ak/k inMODE 1 andMODE2withkff? 1.0.

2.3 SHUTDOWN BANK INSERTION LIMITS (LCO 3.1.6) 2.3.1 The shutdown banks shall be withdrawn to a position greater than or equal to 224 steps withdrawn.

2.4 CONTROL BANK INSERTION LIMITS (LCO 3.1.7) 2.4.1 The control banks are fully withdrawn or shall be limited in physical insertion as shown in Figure 1.

2.4.2 Each control bank shall be considered fully withdrawn from the core at greater than or equal to 224 steps.

2.4.3 The control banks shall be operated in sequence by withdrawal of Bank A, Bank B, Bank C, and Bank D. The control banks shall be sequenced in reverse order upon insertion.

2.4.4 Each control bank not fully withdrawn from the core shall be operated with the following overlap as a function of park position.

Park Position (steps) Bank Overlap (steps) Bank Difference (steps) 224 108 116 225 109 116 226 110 116 227 111 116 228 112 116 229 113 116 230 114 116 231 115 116 Unit 2 Cycle 5 WATTS BAR Page 3 of 13 Revision 1

2.5 HEAT FLUX HOT CHANNEL FACTOR FQ(Z) (LCO 3.2.1) -

FQ(Z) ~ {CFQ / P]

  • K(Z) for P > 0.5 FQ(Z) ~ [CFQ / 0.5]
  • K(Z) for P 0.5 Where P = Thermal Power I Rated Thermal Power 2.5.1 CFQ = 2.50 2.5.2 K(Z) is provided in Figure 2.

2.5.3 F (z) = 1.03

  • F (Z) * (i +

where 1.03 is the fuel manufacturing tolerance, F' (Z) is the measured value of FQ (Z) and UQ is the measurement uncertainty (UQ ~ 5).

2.5.4 F'(Z) equations are:

[T(Zj'°'

F"(Z) 1.03 *

  • A(Z)
  • F(Z)
  • R1 * (i + -) for P > 0.5

[T(Z)]CO F'(Z) 1.03 *

  • A(Z)
  • F(Z)
  • R1 *

(i + ) for P ~ 0.5 Where F (Z) is the measured planar radial peaking factor.

F7 (Z) evaluations are not applicable for axial core regions, measured in percent of core height:

a. Lower core region, from 0 to 10% inclusive,
b. Upper core region, from 90 to 100% inclusive,
c. Grid plane regions, +2% inclusive, and
d. Core plane regions, within 2% of the bank demand positions of the control banks.

2.5.5 [T(Z)]co values are provided in Tables A.1 and A.2 for ROS 1 and ROS 2, respectively.

2.5.6 (Z) factors adjust the surveillance to the reference conditions assumed in generating the [T (Z)] COLR factors. Ay (Z) may be assumed to be equal to 1.0 or may be determined for specific surveillance conditions using the approved methods listed inTS 5.9.5.

2.5.7 The R1 penalty factors account for the potential decrease in transient FQ margin between surveillances. The R1 factors for ROS 1 and ROS 2 are provided in Tables A.3 and A.4 respectively.

2.5.8 Table A.5 provides the required limits on THERMAL POWER and the required AFD reductions for each ROS in the event that additional margin is required.

Unit 2 Cycle 5 WATTS BAR Page 4 of 13 Revision 1

2.6 NUCLEAR ENTHALPY RISE HOT CHANNEL FACTOR -

FAUN (LCO 3.2.2)

FAUN <F AFT RTP * (1+PF*(1P))

where P =

Thermal Power / Rated Thermal Power FAHRTP =

1.65 for RFA-2 fuel, and PF =0.3 2.7 AXIAL FLUX DIFFERENCE AFD (LCO 3.2.3) 2.7.1 The AFD limits for RAOC operating spaces (ROS 1 and ROS 2) and corresponding AFD reduction limits (RA -1 and RA-2) are provided in Figure 3.

2.8 REFUELING BORON CONCENTRATION (LCO 3.9.1) 2.8.1 The refueling boron concentration shall be ~ 2300 ppm.

3.0 NUMBER OF TPBARS IN REACTOR CORE (TS 4.2.1) 3.0.1 There are 1104 tritium producing burnable absorber rods (TPBARs) in the reactor core for Cycle 5.

Unit 2 Cycle 5 WATTS BAR Page 5 of 13 Revision 1

250 225 200 175

=

150 a.

LU

'I) 2 O 125 I-0 a.

a.

LU I -

z 0

75 50 25 0.0 0.2 0.4 0.0 FRACTION OF RATED THERMAL POWER Figure 1 Control Bank Insertion Limits Versus Thermal Power Four Loop Operation Fully withdrawn region shall be the condition where shutdown and control banks are at a position within the interval of ~ 224 and ~ 231 steps withdrawn.

Unit 2 Cycle 5 WATTS BAR Page 6 of 13 Revision 1

1.2 1.1 1

0.8 0.7 0.6 Core Height K(Z) -

w N

0.000 1.000 E 6.000 1.000 L. 0.5 0 12.000 1.000 2

0.4 0.3 0.2 0.1 0

0 1 2 3 4 5 6 7 8 9 10 11 12 Core Height (feet)

Figure 2 K(Z) Normalized FQ(Z) as a Function of Core Height Unit 2 Cycle 5 WATTS BAR Page 7 of 13 Revision 1

110 100 Unacceptable Operation

/ Unacceptable Operation

-1IIr1In N 90 ROS 1 80 RA -1 ROS 2 70

0) - RA -2 60 0) 50

© 40 ROSI ROS2 RA -1 RA-2 Power AFDLimit AFDLimit Power AFD Limit AFD Limit

(% RTP) (%) (%) (% RTP) (%) (%)

30 50 -28 -24 50 -26 -22 100 -12 -8 90 -13 -9 100 7 7 90 8 8 20 50 21 21 50 19 19 10 0

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 Axial Flux Difference (l %)

Figure 3 Axial Flux Difference Acceptable Operation Limits as a Function of Rated Thermal Power (RAOC)

Unit 2 Cycle 5 WATTS BAR Page 8 of 13 Revision 1

Table A.1 1T(Z)1coL Factors for ROS 1 Height 150 3000 8000 12000 14000 16000 (ft) MWD/MTU MWD/MTU MWD/MTU MWD/MTU MWD/MTU MWD/MTU

_12.0720 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.8708 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.6696 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.4684 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.2672 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000

11. 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 10.8648 1.0202 1)9540 fl.9837 1.0588 1.1014 1.1381 10.6636 1.0762 1.0179 1.0560 1.1229 1.1674 1.2007 10.4624 1.1705 1.1142 _1.1563 1.2138 1.2616 1.2878 10.2612 1.1918 1.1471 _1.1926 1.2341 1.2761 1.2908 10.0600 1.1408 1.1156 1.1607 _1.1953 1.2297 1.2356 9.8588 1.1515 1.1419 1.1809 1.2059 1.2321 1.2382 9.6576 1.2258 _1.2248 _1.2535 1.2754 1.2911 1.2882 9.4564 1.2359 1.2405 1.2771 1.2928 1.2931 1.2872 9.2552 1.1781 1.1893 1.2326 1.2438 1.2437 1.2397 9.0540 1.1594 1.1710 1.2118 _1.2197 1.2191 1.2116 8.8528 1.2381 1.2514 1.2853 _1.2843 1.2807 1.2673 8.6516 1.2923 1.3060 1.3388 1.3301 1.3283 1.3138 8.4504 1.2650 1.2841 1.3199 1.3126 1.3122 1.2992 8.2492 1.2124 1.2401 1.2741 1.2710 1.2701 1.2607 8.0480 1.2756 1.3094 1.3316 1.3242 1.3198 1.3098 7.8468 1.3307 _1.3707 _1.3804 1.3687 1.3610 1.3508 7.6456 1.2997 1.3476 1.3513 _1.3407 1.3326 1.3250 7.4444 1.2292 1.2840 1.2849 1.2778 1.2710 1.2671 7.2432 1.2505 _1.3123 _1.3029 1.2923 1.2834 1.2803 7.0420 1.3261 _1.3908 1.3649 1.3473 1.3347 1.3307 6.8408 1.3466 1.4106 1.3744 1.3488 1.3348 1.3317 6.6396 1.2877 1.3501 1.3145 1.2866 1.2740 1.2733 6.4384 1.2763 1.3359 1.2954 1.2616 1.2487 1.2486 6.2372 1.3599 1.4162 1.3570 1.3094 1.2927 1.2903 6.0360 1.3781 1.4336 1.3640 1.3057 1.2876 1.2845 5.8348 1.3163 1.3724 1.3068 1.2425 1.2257 1.2241 5.6336 1.2683 1.3260 1.2647 _1.1931 1.1795 1.1758 5.4324 1.3400 13987 _1.3250 _1.2344 1.2180 1.2049 5.2312 1.3890 1.4478 1.3656 1.2693 1.2542 1.2275 5.0300 1.3819 1.4400 1.3579 1.2659 1.2501 1.2241 4.8288 1.3754 1.4313 1.3503 1.2632 1.2470 1.2204 4.6276 1.3806 1.4337 1.3531 1.2703 1.2531 1.2265 4.4264 1.3958 1.4451 1.3651 1.2861 1.2674 1.2406 4.2252 1.3753 _1.4212 1.3497 _1.2771 1.2584 1.2330 4.0240 1.2977 1.3407 1.2873 1.2265 1.2099 1.1884 3.8228 1.2945 1.3323 1.2882 1.2331 1.2161 1.1959 3.6216 1.3569 1.3879 1.3484 1.2919 1.2718 1.2503 3.4204 1.3702 1.3931 1.3662 1.3090 1.2894 1.2716 3.2192 1.3525 1.3709 1.3563 1.3029 1.2948 1.2738 3.0180 1.3388 _1.3657 1.3531 1.3080 1.3098 1.2923 2.8168 1.3461 1.3734 1.3675 _1.3366 1.3433 1.3311 2.6156 1.3620 1.3821 1.3922 1.3720 1.3850 1.3741 2.4144 1.3280 1.3408 1.3691 _1.3649 1.3862 1.3799 2.2132 1.2488 1.2549 1.3038 1.3196 1.3572 1.3575 2.0120 1.2680 1.2627 1.3255 1.3576 1.3969 1.4019 1.8108 1.3076 1.2889 1.3626 1.4105 1.4589 1.4689 1.6096 1.2672 _1.2378 1.3229 1.3907 1.4490 1.4674 1.4084 1.2002 1.1600 1.2523 1.3374 1.4043 1.4314 1.2072 1.1459 1.0926 1.1881 1.2888 1.3644 1.4009 1.0060 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.8048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.6036 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.4024 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.2012 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unit 2 Cycle 5 WATTS BAR Page 9 of 13 Revision 1

Table A.2 FT(Z1co Factors for ROS 2 Height 150 3000 8000 12000 14000 16000 (ft) MWD/MTU MWD/MTU MWD/MTU MWD/MTU MWD/MTU MWD/MTU 12.0720 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.8708 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.6696 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.4684 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.2672 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 11.0660 -

0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 10.8648 1.0202 0.9540 0.9810 1.0478 1.0962 1.1227 10.6636 1.0762 1.0179 1.0528 1.1117 1.1647 1.1842 10.4624 1.1705 1.1142 1.1563 1.2040 12616 1.2673 10.2612 1.1918 1.1433 1.1925 1.2308 1.2759 1.2820 10.0600 1.1408 1.1065 1.1608 1.1924 1.2218 1.2357 9.8588 1.1515 1.1273 1.1808 1.2056 1.2280 1.2382 9.6576 1.2258 1.2041 1.2538 1.2754 _1.2911 1.2882 9.4564 1.2359 1.2267 1.2655 1.2925 1.2931 1.2872 9.2552 _1.1780 1.1861 1.2247 1.2434 1.2437 1.2397 9.0540 1.1481 1.1712 1.2080 1.2192 12191 1.2116 8.8528 1.2180 1.2514 1.2804 1.2839 _1.2807 1.2673 8.6516 1.2694 1.3059 1.3316 1.3302 1.3283 1.3138 8.4504 1.2432 1.2843 1.3137 1.3125 1.3122 1.2992 8.2492 1.1913 1.2390 1.2684 1.2709 1.2701 1.2607 8.0480 _1.2510 1.3038 1.3258 1.3241 1.3198 1.3098 7.8468 1.3052 1.3608 1.3748 1.3686 1.3610 1.3508 7.6456 _1.2788 1.3346 1.3461 1.3405 _1.3326 1.3250 7.4444 1.2130 1.2687 1.2804 1.2776 1.2710 1.2671 7.2432 1.2397 1.2961 _1.2987 1.2920 1.2834 1.2803 7.0420 1.3199 1.3754 1.3610 1.3470 _1.3347 1.3307 6.8408 1.3423 1.3976 1.3708 1.3485 1.3348 1.3317 6.6396 _1.2856 1.3402 1.3116 1.2863 1.2740 1.2733 6.4384 1.2761 1.3288 1.2931 1.2613 1.2487 1.2486 6.2372 1.3599 1.4112 1.3552 1.3092 1.2927 1.2903 6.0360 1.3781 1.4314 1.3626 1.3054 1.2876 1.2845 5.8348 1.3162 1.3723 1.3051 1.2423 1.2259 1.2241 5.6336 1.2682 1.3258 1.2588 1.1930 1.1770 1.1758 5.4324 _1.3357 1.3944 1.3147 1.2341 1.2112 1.2049 5.2312 1.3786 1.4377 1.3499 1.2657 1.2391 1.2248 5.0300 1.3653 1.4247 1.3380 1.2560 1.2296 1.2150 4.8288 1.3499 1.4092 1.3279 1.2473 1.2197 1.2048 4.6276 _1.3494 1.4079 1.3287 1.2482 1.2213 1.2057 4.4264 1.3568 1.4139 1.3382 1.2575 1.2303 1.2129 4.2252 1.3299 1.3855 1.3192 1.2427 _1.2196 1.1988 4.0240 1.2485 1.3024 1.2534 1.1880 1.1722 1.1495 3.8228 1.2414 1.2896 1.2497 1.1878 1.1774 1.1494 3.6216 1.2991 1.3392 1.3013 1.2452 1.2309 1.2025 3.4204 1.3077 1.3418 1.3100 1.2676 1.2460 1.2248 3.2192 _1.2935 1.3167 1.2955 1.2659 1.2442 1.2262 3.0180 1.2901 1.2986 1.2884 1.2690 1.2487 1.2327 2.8168 1.2953 1.2981 _1.2954 1.2898 1.2720 1.2574 2.6156 1.3065 1.3037 1.3144 1.3210 1.3058 1.2934 2.4144 _1.2723 1.2642 1.2917 1.3146 _1.3043 1.2961 2.2132 1.1948 1.1827 1.2287 1.2705 1.2676 1.2724 2.0120 1.2114 1.1885 1.2480 1.3066 1.3087 1.3114 1.8108 _1.2475 1.2112 1.2820 1.3570 1.3641 1.3715 1.6096 _1.2074 1.1611 1.2439 1.3372 1.3527 1.3679 1.4084 1.1421 1.0863 1.1768 1.2853 _1.3090 1.3325 1.2072 _1.0892 1.0216 1.1160 1.2380 1.2702 1.3024 1.0060 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.8048 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.6036 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.4024 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.2012 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unit 2 Cycle 5 WATTS BAR Page 10 of 13 Revision 1

Table A.3 Rj Margin Decrease Factors for ROS 1 Cycle Burnup R Cycle Burnup R Cycle Burnup R (MWD/MTU) __________

(MWD/MTU) _____

(MWD/MTU) -

~150 1.0000 7726 1.0022 15302 1.0023 339 1.0034 7916 1.0024 15492 1.0024 529 1.0064 8105 1.0025 15681 _1.0028 718 1.0081 8294 1.0024 15871 1.0035 908 1.0086 8484 =1.0022 1.0019 16060 16249 1.0042 1.0046 1097 1.0102 8673 1286 1476 1.0122 1.0135 8863 9052

=1.0015 1.0012 16439 16628 1.0050 1.0054 1665 1.0140 9241 1.0008 16818 1.0057 1855 1.0137 9431 11.0005 1.0022 17007 17196 1.0061 1.0065 2044 1.0126 9620 2233 1.0108 9810 1.0050 17386 1.0069 2423 1.0086 9999 1.0081 17575 1.0070 2612 1.0065 10188 1.0192 17765 1.0067 2802 1.0045 10378 1.0223 17954 1.0064 2991 1.0057 10567 1.0245 18143 1.0062 3180 1.0070 10757 1.0251 18333 1.0060 3370 1.0076 10946 1.0255 18522 1.0058 3559 1.0076 11135 1.0258 ~18712 1.0056 3749 1.0070 11325 1.0261 _____________

3938 1.0061 11514 1.0313 _____________

4127 1.0049 11704 1.0313 _____________

4317 1.0036 11893 1.0311 _____________

4506 1.0023 12082 =1 .0305 _____________

4696 1.0012 12272 1.0297 _____________

4885 1.0004 12461 1.0287 ____________

5075 1.0000 12651 =1.0273 ____________

5264 1.0000 12840 1.0257 _____________

5453 1.0000 13030 1.0190 _____________

5643 1.0064 13219 1.0170 _____________

5832 -

.0082 13408 1.051 ____________

6022 1.0075 13598 1.0132 ____________

6211 1.0064 13787 1.0113 ____________

6400 1.0055 13977 1.0094 _____________

6590 1.0045 14166 1.0074 ____________

6779 1.0037 14355 1.0056 _____________

6969 1.0029 14545 1.0041 _____________

7158 1.0021 14734 1.0030 _____________

7347 1.0016 14924 1.0026 ____________

7537 1.0019 15113 =1.0023 ____________

Unit 2 Cycle 5 WATTS BAR Page 11 of 13 Revision 1

Table A.4 Rj Margin Decrease Factors for ROS 2 Cycle Burnup Rj Cycle Burnup R Cycle Burnup Rj (MWDIMTU) __________

(MWD/MTU) _______

(MWD/MTU) ___________

~150 1.0005 7726 1.0000 15302 1.0042 339 1.0044 7916 1.0000 15492 1.0038 529 1.0082 8105 1.0000 15681 1.0035 718 1.0123 8294 1.0000 15871 1.0032 908 1.0162 8484 1.0000 16060 1.0028 1097 1.0197 8673 1.0043 16249 1.0025 1286 1.0226 8863 1.0074 16439 1.0024 1476 1.0244 9052 1.0101 16628 1.0028 1665 1.0247 9241 1.0125 16818 1.0031 1855 1.0239 9431 1.0147 17007 1.0035 2044 1.0220 9620 1.0168 17196 1.0039 2233 1.0190 9810 1.0187 17386 1.0043 2423 1.0154 9999 1.0205 17575 1.0047 2612 1.0117 10188 1.0181 17765 1.0051 2802 1.0083 10378 1.0167 17954 1.0054 2991 1.0055 10567 1.0153 18143 1.0052 3180 1.0039 10757 1.0170 18333 1.0050 3370 1.0024 10946 1.0163 18522 1.0048 3559 1.0012 11135 1.0147 ~18712 1.0046 3749 1.0003 11325 1.0131 ____________

3938 1.0000 11514 1.0108 ____________

4127 1.0000 11704 1.0086 ____________ ____________

4317 1.0000 11893 1.0069 ____________

4506 1.0008 12082 1.0058 ____________

4696 1.0015 12272 1.0050 ____________ ____________

4885 1.0005 12461 1.0044 ____________

5075 1.0000 12651 1.0039 ____________

5264 1.0000 12840 1.0037 ____________

5453 1.0000 13030 1.0055 ____________

5643 1.0000 13219 1.0055 ____________

5832 1.0000 13408 1.0056 ____________ ____________

6022 1.0000 13598 1.0056 ____________

6211 1.0000 13787 1.0056 ____________

6400 1.0000 13977 1.0056 ____________

6590 1.0000 14166 1.0055 ____________

6779 1.0000 14355 1.0054 ____________

6969 1.0000 14545 1.0052 ____________

7158 1.0000 14734 1.0050 ____________

7347 1.0002 14924 1.0048 ____________

7537 1.0002 15113 1.0045 ____________

Unit 2 Cycle 5 WATTS BAR Page 12 of 13 Revision 1

Table A.5 Required THERMAL POWER Limits and AFD Reductions RAOC Required THERMAL Required FQ'(Z) Margin Required AFD Operating POWER Limit Improvement (°"°) Reduction Space (%RTP)

ROS I ~5.5 ~90 See Figure 3 RA-1

<50 N/A ROS 2 ~3.4 ~90 See Figure 3 RA-2

>3.4 <50 N/A Unit 2 Cycle 5 WATTS BAR Page 13 of 13 Revision 1

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