WBL-24-050, Of Cycle 20 Core Operating Limits Report (COLR)
| ML24324A213 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 11/19/2024 |
| From: | Reneau W Tennessee Valley Authority |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| WBL-24-050 | |
| Download: ML24324A213 (1) | |
Text
1\\14 TENNESSEE VALLEY AUTHORITY Post Office Box 2000, Spring City, Tennessee 3738 I WBL-24-050 November 19, 2024 ATTN : Document Control Desk U. S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 1 Facility Operating License No. NPF-90 NRG Docket No. 50-390 10 CFR 50.4
Subject:
REVISION O OF THE UNIT 1 CYCLE 20 CORE OPERATING LIMITS REPORT (COLR)
Pursuant to Watts Bar Nuclear Plant Technical Specifications Section 5.9.5.d, Tennessee Valley Authority (TVA) has enclosed Revision O of the Unit 1 Cycle 20 Core Operating Limits Report (COLR). The analytical methods used to determine the core operating limits were previously reviewed and approved by the NRG.
There are no new regulatory commitments contained in this letter or the enclosure. Should you have questions regarding this submittal, please contact Jonathan Johnson, Site Licensing Manager, at jtjohnson0@tva.gov.
~~
Site Vice President Watts Bar Nuclear Plant
U.S. Nuclear Regulatory Commission WBL-24-050 Page 2 November 19, 2024 Enclosure Watts Bar Nuclear Plant, Unit 1, Cycle 20 Core Operating Limits Report, Revision 0, October 2024 cc: (w/ enclosure)
NRC Regional Administrator - Region II NRC Project Manager - Watt Bar Nuclear Plant NRC Senior Resident Inspector - Watts Bar Nuclear Plant
WBL-24-050 E1 of 1 ENCLOSURE Watts Bar Nuclear Plant, Unit 1, Cycle 20 Core Operating Limits Report Revision 0 October 2024
Prepared by:
QA Record L36 240930 800 WATTS BAR NUCLEAR PLANT, UNIT 1, CYCLE 20 CORE OPERATING LIMITS REPORT Revision 0 October 2024 0'>7~.1!11s19~db)'8-tl~ J;f,,.,fci C l.tmtlC.ffll.lll.,jtbtl1HJfv;u;ov
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Jamel C. Bell, PWR Fuel Engineering Verified by:
Gary T. Wolfram, PWR Fuel Engineering Reviewed by:
D19!t.sfl1sJgr.e-J by Rllchh!:. John. A.
ON-; dt,i:gov. Ct=tv£ dt-..ma1n, otreMa.fn. ov:Cor~*,lt, O.J.,,Utt1i, a,"'Rltchlt..
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John A. Ritchie, Manager, PWR Fuel Engineering Date Mack' Bryan Thomas DigitallysignedbyMack,BryanThomas Date: 2024.10.15 11 :59:40 -04'00' Bryan T. Mack, Manager, Reactor Engineering Approved by:
D.::,,:u.\\.cl Lee. I ~-a a_
PORC Chairman Kevin M. Michael, Plant Manager Revision Date of PORC 0
Unit l WATTS BAR Approval See above Affected Reason for Revision Pages All Initial issue Page I of 13 Date
\\CJ-\\7 -2.024 Date Date Cycle 20 Revision 0
Unit 1 Cycle 20 WATTS BAR Page 2 of 13 Revision 0 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Watts Bar Unit 1 Cycle 20 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 (FHN) 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 k/k/°F (upper limit).
With the BOL/ARO/HZP - MTC more positive than -1.336 x 10-5 k/k/°F (BOL MTC limit), establish control rod withdrawal limits to ensure the MTC remains less positive than or equal to 0 k/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 k/k/°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 k/k/°F.
Unit 1 Cycle 20 WATTS BAR Page 3 of 13 Revision 0 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 k/k/°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% k/k in MODE 1 and MODE 2.
2.2.2 For TS 3.1.6, SDM shall be 1.6% k/k in MODE 1 and MODE 2.
2.2.3 For TS 3.1.7, SDM shall be 1.6% k/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 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 1 Cycle 20 WATTS BAR Page 4 of 13 Revision 0 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 / Rated Thermal Power 2.5.1 CFQ = 2.50 2.5.2 K(Z) is provided in Figure 2.
2.5.3
() = 1.03
() 1 +
100 where 1.03 is the fuel manufacturing tolerance,
() is the measured value of () and is the measurement uncertainty (5).
2.5.4
() equations are:
() 1.03
[()]
()
() 1 +
100 > 0.5
() 1.03
[()]
0.5
()
() 1 +
100 0.5 Where
() is the measured planar radial peaking factor.
() 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 [()] values are provided in Tables A.1 and A.2 for ROS 1 and ROS 2, respectively.
2.5.6 () factors adjust the surveillance to the reference conditions assumed in generating the [()]factors. () may be assumed to be equal to 1.0 or may be determined for specific surveillance conditions using the approved methods listed in TS 5.9.5.
2.5.7 The penalty factors account for the potential decrease in transient FQ margin between surveillances. The 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 20 WATTS BAR Page 5 of 13 Revision 0 2.6 NUCLEAR ENTHALPY RISE HOT CHANNEL FACTOR - FHN (LCO 3.2.2)
FHN FHRTP * ( 1 + PF * ( 1-P))
where P = Thermal Power / Rated Thermal Power FHRTP
= 1.65 for RFA-2 fuel 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.
Unit 1 Cycle 20 WATTS BAR Page 6 of 13 Revision 0 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 224 and 231 steps withdrawn.
250 BANK A 11 (ALL POWERS, 224) I 225 'f-!:===7~========;';;;;;;;;;=..,._ _____ ----:;,-;::=====;~--
1 (0.193, 2241 1 1 (o.699, 224) 1 200 BANK B (1.0, 177) z 175 1 (o.o, 1so1 1 lo; Cl'.
0 ::c
§ 150
<J)
Q.
LU
<J) z O 125 0
Q.
Q.
LU
~ 100 z <
a, 0
0 Cl'. 75 (0.0, 64) so 25 (0.227, 0) 0----------------------------
0.0 0.2 0.4 0.6 0.8 1.0 FRACTION OF RA TED THERMAL POWER
Unit 1 Cycle 20 WATTS BAR Page 7 of 13 Revision 0 Figure 2 K(Z) - Normalized FQ(Z) as a Function of Core Height 0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
1.1 1.2 0
1 2
3 4
5 6
7 8
9 10 11 12 Normalized FQ
- Power Core Height (feet)
Core Height K(Z) 0.000 1.000 6.000 1.000 12.000 1.000
Unit 1 Cycle 20 WATTS BAR Page 8 of 13 Revision 0 Figure 3 Axial Flux Difference Acceptable Operation Limits as a function of Rated Thermal Power (RAOC)
Unit 1 Cycle 20 WATTS BAR Page 9 of 13 Revision 0 Table A.1
[()] Factors for ROS 1 Height (ft) 150 MWD/MTU 2000 MWD/MTU 8000 MWD/MTU 12000 MWD/MTU 14000 MWD/MTU 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 0.9698 0.9441 0.9697 1.0748 1.1083 1.1060 10.6636 1.0359 1.0168 1.0506 1.1474 1.1708 1.1713 10.4624 1.1380 1.1231 1.1594 1.2454 1.2615 1.2595 10.2612 1.1670 1.1598 1.1972 1.2691 1.2699 1.2760 10.0600 1.1213 1.1240 1.1635 1.2218 1.2176 1.2259 9.8588 1.1469 1.1481 1.1888 1.2303 1.2280 1.2306 9.6576 1.2357 1.2334 1.2773 1.2925 1.2934 1.2913 9.4564 1.2507 1.2497 1.2954 1.2959 1.2948 1.2901 9.2552 1.1932 1.2034 1.2403 1.2411 1.2376 1.2359 9.0540 1.1661 1.1842 1.2152 1.2144 1.2133 1.2089 8.8528 1.2511 1.2651 1.2865 1.2851 1.2782 1.2700 8.6516 1.3125 1.3220 1.3374 1.3324 1.3216 1.3129 8.4504 1.2877 1.2987 1.3166 1.3055 1.2966 1.2909 8.2492 1.2341 1.2468 1.2661 1.2511 1.2469 1.2423 8.0480 1.3022 1.3152 1.3231 1.3007 1.2966 1.2897 7.8468 1.3622 1.3767 1.3712 1.3400 1.3358 1.3272 7.6456 1.3310 1.3503 1.3387 1.3061 1.3039 1.2961 7.4444 1.2578 1.2835 1.2681 1.2382 1.2382 1.2327 7.2432 1.2847 1.3134 1.2845 1.2503 1.2495 1.2435 7.0420 1.3676 1.3961 1.3467 1.3045 1.3010 1.2930 6.8408 1.3885 1.4167 1.3495 1.3044 1.3004 1.2924 6.6396 1.3226 1.3517 1.2837 1.2453 1.2373 1.2318 6.4384 1.3074 1.3372 1.2676 1.2252 1.2148 1.2068 6.2372 1.3961 1.4247 1.3362 1.2799 1.2655 1.2546 6.0360 1.4152 1.4426 1.3477 1.2825 1.2662 1.2560 5.8348 1.3489 1.3760 1.2891 1.2235 1.2083 1.2005 5.6336 1.2975 1.3264 1.2435 1.1760 1.1655 1.1577 5.4324 1.3759 1.4024 1.3041 1.2286 1.2193 1.1944 5.2312 1.4277 1.4522 1.3454 1.2662 1.2561 1.2253 5.0300 1.4193 1.4432 1.3397 1.2612 1.2530 1.2232 4.8288 1.4103 1.4341 1.3356 1.2572 1.2492 1.2198 4.6276 1.4140 1.4370 1.3425 1.2637 1.2581 1.2286 4.4264 1.4280 1.4499 1.3590 1.2799 1.2743 1.2444 4.2252 1.4046 1.4257 1.3452 1.2707 1.2655 1.2369 4.0240 1.3211 1.3419 1.2814 1.2194 1.2148 1.1901 3.8228 1.3150 1.3341 1.2836 1.2286 1.2221 1.1987 3.6216 1.3818 1.3955 1.3492 1.2934 1.2821 1.2575 3.4204 1.3929 1.3967 1.3691 1.3194 1.2989 1.2807 3.2192 1.3674 1.3666 1.3592 1.3210 1.3031 1.2849 3.0180 1.3550 1.3493 1.3569 1.3309 1.3132 1.2958 2.8168 1.3592 1.3526 1.3721 1.3623 1.3391 1.3225 2.6156 1.3689 1.3583 1.3970 1.3993 1.3765 1.3613 2.4144 1.3253 1.3126 1.3723 1.3923 1.3757 1.3646 2.2132 1.2357 1.2226 1.3039 1.3438 1.3354 1.3379 2.0120 1.2458 1.2281 1.3273 1.3848 1.3820 1.3813 1.8108 1.2763 1.2526 1.3675 1.4425 1.4454 1.4491 1.6096 1.2245 1.1975 1.3272 1.4216 1.4337 1.4452 1.4084 1.1444 1.1149 1.2535 1.3640 1.3852 1.4049 1.2072 1.0781 1.0449 1.1888 1.3143 1.3450 1.3736 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 20 WATTS BAR Page 10 of 13 Revision 0 Table A.2
[()] Factors for ROS 2 Height (ft) 150 MWD/MTU 2000 MWD/MTU 8000 MWD/MTU 12000 MWD/MTU 14000 MWD/MTU 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 0.9698 0.9441 0.9697 1.0384 1.0789 1.0987 10.6636 1.0359 1.0168 1.0506 1.1107 1.1483 1.1649 10.4624 1.1380 1.1231 1.1594 1.2080 1.2416 1.2542 10.2612 1.1671 1.1598 1.1972 1.2357 1.2628 1.2725 10.0600 1.1209 1.1240 1.1635 1.1958 1.2177 1.2245 9.8588 1.1400 1.1481 1.1888 1.2138 1.2280 1.2267 9.6576 1.2233 1.2334 1.2726 1.2837 1.2934 1.2825 9.4564 1.2344 1.2476 1.2912 1.2883 1.2948 1.2865 9.2552 1.1796 1.1915 1.2370 1.2356 1.2376 1.2359 9.0540 1.1643 1.1651 1.2128 1.2142 1.2110 1.2088 8.8528 1.2512 1.2478 1.2849 1.2815 1.2777 1.2701 8.6516 1.3125 1.3053 1.3360 1.3262 1.3219 1.3129 8.4504 1.2877 1.2822 1.3144 1.3001 1.2950 1.2909 8.2492 1.2341 1.2368 1.2610 1.2460 1.2417 1.2423 8.0480 1.3022 1.3100 1.3199 1.2956 1.2883 1.2897 7.8468 1.3622 1.3751 1.3674 1.3351 1.3258 1.3272 7.6456 1.3310 1.3505 1.3347 1.3016 1.2942 1.2961 7.4444 1.2578 1.2834 1.2641 1.2339 1.2290 1.2327 7.2432 1.2847 1.3134 1.2802 1.2458 1.2404 1.2435 7.0420 1.3676 1.3961 1.3422 1.2996 1.2918 1.2930 6.8408 1.3885 1.4167 1.3446 1.3008 1.2917 1.2924 6.6396 1.3226 1.3517 1.2831 1.2424 1.2301 1.2318 6.4384 1.3074 1.3371 1.2672 1.2228 1.2107 1.2068 6.2372 1.3961 1.4247 1.3358 1.2780 1.2627 1.2546 6.0360 1.4152 1.4426 1.3473 1.2810 1.2649 1.2560 5.8348 1.3489 1.3761 1.2889 1.2228 1.2083 1.2005 5.6336 1.2971 1.3235 1.2434 1.1756 1.1618 1.1576 5.4324 1.3679 1.3944 1.3026 1.2278 1.2048 1.1941 5.2312 1.4128 1.4390 1.3401 1.2605 1.2352 1.2213 5.0300 1.3992 1.4241 1.3296 1.2519 1.2286 1.2119 4.8288 1.3837 1.4069 1.3205 1.2455 1.2225 1.2057 4.6276 1.3841 1.4053 1.3222 1.2492 1.2262 1.2086 4.4264 1.3931 1.4116 1.3333 1.2620 1.2387 1.2197 4.2252 1.3658 1.3821 1.3150 1.2493 1.2271 1.2080 4.0240 1.2804 1.2969 1.2479 1.1939 1.1753 1.1582 3.8228 1.2707 1.2874 1.2457 1.1976 1.1799 1.1624 3.6216 1.3282 1.3441 1.3011 1.2535 1.2345 1.2146 3.4204 1.3333 1.3442 1.3140 1.2736 1.2560 1.2355 3.2192 1.3066 1.3144 1.2997 1.2732 1.2573 1.2377 3.0180 1.2947 1.3047 1.2965 1.2775 1.2646 1.2458 2.8168 1.2983 1.3075 1.3121 1.2951 1.2842 1.2662 2.6156 1.3065 1.3112 1.3315 1.3226 1.3147 1.2982 2.4144 1.2645 1.2660 1.3066 1.3135 1.3110 1.2986 2.2132 1.1788 1.1777 1.2397 1.2647 1.2695 1.2703 2.0120 1.1883 1.1812 1.2601 1.3004 1.3108 1.3087 1.8108 1.2174 1.2028 1.2964 1.3518 1.3681 1.3701 1.6096 1.1680 1.1482 1.2567 1.3298 1.3545 1.3641 1.4084 1.0917 1.0673 1.1855 1.2739 1.3065 1.3239 1.2072 1.0286 0.9987 1.1231 1.2257 1.2667 1.2926 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 20 WATTS BAR Page 11 of 13 Revision 0 Table A.3 Rj Margin Decrease Factors for ROS 1 Cycle Burnup RJ Cycle Burnup RJ Cycle Burnup RJ (MWD/MTU)
(MWD/MTU)
(MWD/MTU) 150 1.0000 7728 1.0143 15306 1.0000 339 1.0000 7918 1.0134 15496 1.0000 529 1.0000 8107 1.0126 15685 1.0000 718 1.0000 8297 1.0117 15875 1.0000 908 1.0015 8486 1.0148 16064 1.0000 1097 1.0027 8675 1.0138 16254 1.0000 1287 1.0025 8865 1.0127 16443 1.0000 1476 1.0014 9054 1.0143 16632 1.0000 1666 1.0003 9244 1.0159 16822 1.0000 1855 1.0000 9433 1.0173 17011 1.0000 2045 1.0015 9623 1.0186 17201 1.0001 2234 1.0043 9812 1.0198 17390 1.0001 2423 1.0071 10002 1.0168 17580 1.0000 2613 1.0097 10191 1.0179 17769 1.0000 2802 1.0118 10381 1.0190 17959 1.0000 2992 1.0130 10570 1.0171 18148 1.0000 3181 1.0119 10759 1.0153 18338 1.0000 3371 1.0100 10949 1.0135 3560 1.0077 11138 1.0118 3750 1.0053 11328 1.0101 3939 1.0031 11517 1.0081 4129 1.0029 11707 1.0063 4318 1.0024 11896 1.0048 4507 1.0016 12086 1.0034 4697 1.0007 12275 1.0023 4886 1.0000 12464 1.0013 5076 1.0064 12654 1.0006 5265 1.0100 12843 1.0000 5455 1.0138 13033 1.0010 5644 1.0177 13222 1.0007 5834 1.0204 13412 1.0004 6023 1.0202 13601 1.0003 6213 1.0198 13791 1.0001 6402 1.0193 13980 1.0000 6591 1.0187 14170 1.0000 6781 1.0181 14359 1.0000 6970 1.0174 14548 1.0000 7160 1.0167 14738 1.0000 7349 1.0159 14927 1.0000 7539 1.0151 15117 1.0000
Unit 1 Cycle 20 WATTS BAR Page 12 of 13 Revision 0 Table A.4 Rj Margin Decrease Factors for ROS 2 Cycle Burnup RJ Cycle Burnup RJ Cycle Burnup RJ (MWD/MTU)
(MWD/MTU)
(MWD/MTU) 150 1.0000 7728 1.0108 15306 1.0000 339 1.0000 7918 1.0102 15496 1.0000 529 1.0014 8107 1.0094 15685 1.0000 718 1.0031 8297 1.0085 15875 1.0000 908 1.0040 8486 1.0070 16064 1.0000 1097 1.0043 8675 1.0058 16254 1.0000 1287 1.0040 8865 1.0048 16443 1.0000 1476 1.0030 9054 1.0038 16632 1.0000 1666 1.0018 9244 1.0028 16822 1.0000 1855 1.0006 9433 1.0020 17011 1.0000 2045 1.0000 9623 1.0037 17201 1.0000 2234 1.0000 9812 1.0053 17390 1.0000 2423 1.0000 10002 1.0078 17580 1.0000 2613 1.0000 10191 1.0095 17769 1.0000 2802 1.0000 10381 1.0112 17959 1.0000 2992 1.0015 10570 1.0129 18148 1.0000 3181 1.0020 10759 1.0146 18338 1.0000 3371 1.0022 10949 1.0161 3560 1.0021 11138 1.0151 3750 1.0018 11328 1.0142 3939 1.0014 11517 1.0139 4129 1.0009 11707 1.0130 4318 1.0005 11896 1.0121 4507 1.0001 12086 1.0111 4697 1.0000 12275 1.0102 4886 1.0000 12464 1.0091 5076 1.0000 12654 1.0080 5265 1.0000 12843 1.0069 5455 1.0000 13033 1.0051 5644 1.0000 13222 1.0040 5834 1.0000 13412 1.0029 6023 1.0007 13601 1.0021 6213 1.0013 13791 1.0014 6402 1.0033 13980 1.0008 6591 1.0050 14170 1.0004 6781 1.0063 14359 1.0001 6970 1.0075 14548 1.0000 7160 1.0086 14738 1.0000 7349 1.0095 14927 1.0000 7539 1.0105 15117 1.0000
Unit 1 Cycle 20 WATTS BAR Page 13 of 13 Revision 0 Table A.5 Required THERMAL POWER Limits and AFD Reductions RAOC Operating Space Required FQW(Z) Margin Improvement (%)
Required THERMAL POWER Limit
(%RTP)
Required AFD Reduction ROS 1 2.7 90 See Figure 3 RA-1
>2.7
<50 N/A ROS 2 5.0 90 See Figure 3 RA-2
>5.0
<50 N/A