BW210024, Core Operating Limits Report, Braidwood Cycle 23, Revision 17

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Core Operating Limits Report, Braidwood Cycle 23, Revision 17
ML21105A096
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Site: Braidwood Constellation icon.png
Issue date: 04/15/2021
From:
Exelon Generation Co
To:
Office of Nuclear Reactor Regulation
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BW210024
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Text

CORE OPERATING LIMITS REPORT (COLR)

FOR BRAIDWOOD UNIT 1 CYCLE 23 EXELON TRACKING ID:

COLR BRAIDWOOD 1 REVISION 17

COLR BRAIDWOOD 1 Revision 17 Page 1 of 15 CORE OPERATING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Braidwood Station Unit 1 Cycle 23 has been prepared in accordance with the requirements of Technical Specification 5.6.5 (ITS).

The Technical Specification Safety Limits and Limiting Conditions for Operation (LCOs) affected by this report are listed below:

SL 2.1.1 Reactor Core Safety Limits (SLs)

LCO 3.1.1 SHUTDOWN MARGIN (SOM)

LCO 3.1.3 Moderator Temperature Coefficient (MTC)

LCO 3.1.4 Rod Group Alignment Limits LCO 3.1.5 Shutdown Bank Insertion Limits LCO 3.1.6 Control Bank Insertion Limits LCO 3.1.8 PHYSICS TESTS Exceptions - MODE 2 LCO 3.2.1 Heat Flux Hot Channel Factor (Fo(Z))

LCO 3.2.2 Nuclear Enthalpy Rise Hot Channel Factor (FN6H)

LCO 3.2.3 AXIAL FLUX DIFFERENCE (AFD)

LCO 3.2.5 Departure from Nucleate Boiling Ratio (DNBR)

LCO 3.3.1 Reactor Trip System (RTS) Instrumentation LCO 3.3.9 Boron Dilution Protection System (BOPS)

LCO 3.4.1 Reactor Coolant System (RCS) Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits LCO 3.9.1 Boron Concentration The portions of the Technical Requirements Manual (TRM) affected by this report are listed below:

TRM TLCO 3.1.b Boration Flow Paths - Operating TRM TLCO 3.1.d Charging Pumps - Operating TRM TLCO 3.1.f Borated Water Sources - Operating TRM TLCO 3.1.g Position Indication System - Shutdown TRM TLCO 3.1.h Shutdown Margin (SOM) - MODE 1 and MODE 2 with keff ~ 1.0 TRM TLCO 3.1.i Shutdown Margin (SOM) - MODE 5 TRM TLCO 3.1.j Shutdown and Control Rods TRM TLCO 3.1.k Position Indication System - Shutdown (Special Test Exception)

COLR BRAIDWOOD I Revision 17 Page 2 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 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 are applicable for the entire cycle unless otherwise identified. These limits have been developed using the NRG-approved methodologies specified in Technical Specification 5.6.5.

2.1 Reactor Core Safety Limits (Sls) (SL 2.1.1) 2.1.1 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 limits specified in Figure 2.1.1.

680-.-------,------,------,-------,.--------,-------,

660

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2471 psia 0,

Q)

C)

,_ 640 Q)

=i

-+-'

0 I.....

Q) 0....

E Q) f-- 620 Q) 0, 0

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<:(

600 580 ---'-----'--'---+-----'--'--.........-l-----'-...__....,_-+--'---'-----'---+-.,___....,_........____,_...__....,____._---i 0 0.2 0.4 0.6 0.8 1.2 Fraction of Nominal Power Figure 2.1.1: Reactor Core Limits

COLR BRAIDWOOD 1 Revision 17 Page 3 of 15 CORE OPERATING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 2.2 SHUTDOWN MARGIN (SDM)

The SDM limit for MODES 1, 2, 3, and 4 is:

2.2.1 The SDM shall be greater than or equal to 1.3% llk/k (LCOs 3.1.1, 3.1.4, 3.1.5, 3.1.6, 3.1.8, 3.3.9; TRM TLCOs 3.1.b, 3.1.d, 3.1.f, 3.1.h, and 3.1.j).

The SDM limit for MODE 5 is:

2.2.2 SDM shall be greater than or equal to 1.3% llk/k (LCO 3.1.1, LCO 3.3.9; TRM TLCOs 3.1.i and 3.1.j).

2.3 Moderator Temperature Coefficient (MTC) (LCO 3.1.3)

The Moderator Temperature Coefficient (MTC) limits are:

2.3.1 The BOL/ARO/HZP-MTC upper limit shall be +2.233 x 10-5 !lk/k/°F.

2.3.2 The EOL/ARO/HFP-MTC lower limit shall be -4.6 x 10-4 llk/k/°F.

2.3.3 The EOL/ARO/HFP-MTC Surveillance limit at 300 ppm shall be -3.7 x 10-4 !lk/k/°F.

2.3.4 The EOL/ARO/HFP-MTC Surveillance limit at 60 ppm shall be -4.3 x 10-4 !lk/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 HFP stands for Hot Full Thermal Power 2.4 Shutdown Bank Insertion Limits (LCO 3.1.5) 2.4.1 All shutdown banks shall be fully withdrawn to at least 224 steps.

2.5 Control Bank Insertion Limits (LCO 3.1.6) 2.5.1 The control banks, with Bank A greater than or equal to 224 steps, shall be limited in physical insertion as shown in Figure 2.5.1.

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

2.5.3 The control banks shall be operated in sequence by withdrawal of Bank A, Bank 8, Bank C and Bank D. The control banks shall be sequenced in reverse order upon insertion.

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

Park Position (step) Overlap Limit (step) 226 111

COLR BRAIDWOOD 1 Revision 17 Page 4 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 Figure 2.5.1:

Control Bank Insertion Limits Versus Percent Rated Thermal Power 224 (27%, 224) (77%, 224) y F F 220

/

/

200 180 ~

VcsANKB I

~

/

C:

3: 160

/1 I / (100%, 161)

E

-c

.c

~ 140 1<0%, 162)

I 1LIBANKC I

/

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Q)

~ 120

/'

C

/

0 0 100 0..

.If:: / IBANKD I C

Ill Ill

-c 80 / /

0 c:: V /

60 / /

/

40 "I (0%, 47) I

/

/

20

~/

1(30%.0)v 0

0 10 20 30 40 50 60 70 80 90 100 Rated Thermal Power (Percent)

COLR BRAIDWOOD 1 Revision 17 Page 5 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 2.6 Heat Flux Hot Channel Factor (Fa(Z)} (LCO 3.2.1) 2.6.1 Total Peaking Factor:

FRTP FQ(Z) s-Q-xK(Z) forPs0.5 0.5 FRTP FQ(Z) s-Q-xK(Z) forP>0.5 p

where: P = the ratio of THERMAL POWER to RATED THERMAL POWER F~TP = 2.60 K(Z) is provided in Figure 2.6.1.

Figure 2.6.1 K(Z) - Normalized FQ(Z) as a Function of Core Height 1.1 (0.0 1.0) (6.0 1.0) (12.0 1.0) 0.9 0.8 N 0.7 0

LL

~ 0.6 iii e o.s 0

z g ..,._LOCA Limiting I

ii:::

0.4 Envelope I 0.3 0.2 0.1 0

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

COLR BRAIDWOOD 1 Revision 17 Page 6 of 15 CORE OPERATING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 2.6.2 W(Z) Values:

a) When the Power Distribution Monitoring System (PDMS) is OPERABLE, W(Z) = 1.00000 for all axial points.

b) When PDMS is inoperable, W(Z) is provided as:

1) Table 2.6.2.a are the normal operation W(Z) values that correspond to the NORMAL AXIAL FLUX DIFFERENCE (AFD) Acceptable Operation Limits provided in Figure 2.8.1.a. The Normal AFD Acceptable Operation Limits may be invoked at any time and must be used with the corresponding W(Z) values.
2) Table 2.6.2.b are the Expanded normal operation W(Z) values that correspond to the EXPANDED AXIAL FLUX DIFFERENCE (AFD) Acceptable Operation Limits provided in Figure 2.8.1.b. The Expanded AFD Acceptable Operation Limits may be invoked at any time and must be used with the corresponding W(Z) values.

Table 2.6.2.c shows the Fco(z) penalty factors that are greater than 2% per the allowable surveillance frequency. These values shall be used to increase the Fwo(z) as per Surveillance Requirement 3.2.1.2. A 2% penalty factor shall be used at all cycle burnups that are outside the range of Table 2.6.2.c.

2.6.3 Uncertainty

The uncertainty, UFO, to be applied to the Heat Flux Hot Channel Factor Fo(Z) shall be calculated by the following formula where:

Uqu = Base Fo measurement uncertainty = 1.05 when PDMS is inoperable (Uqu is defined by PDMS and cannot be less than 1.05 when OPERABLE.)

Ue = Engineering uncertainty factor= 1.03 2.6.4 PDMS Alarms:

Fo(Z) Warning Setpoint = 2% Fo(Z) Margin Fo(Z) Alarm Setpoint = 0% Fo(Z) Margin

COLR BRAIDWOOD 1 Revision 17 Page 7 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 Table 2.6.2.a W(Z) versus Core Height for Normal AFD Acceptable Operation Limits in Figure 2.8.1.a (Top and Bottom 8% Excluded per Braidwood SR 3.2.1.2 Bases)

Height 150 4000 14000 20000 (feet} MWD/MTU MWD/MTU MWD/MTU MWD/MTU 0.00 (core bottom\ 1.3178 1.4068 1.1995 1.1873 0.20 1.3105 1.3970 1.1937 1.1789 0.40 1.3108 1.3931 1.1957 1.1798 0.60 1.3129 1.3925 1.2022 1.1863 0.80 1.3201 1.3946 1.2140 1.1995 1.00 1.3173 1.3861 1.2170 1.2041 1.20 1.3059 1.3698 1.2108 1.1985 1.40 1.2901 1.3493 1.2010 1.1893 1.60 1.2736 1.3273 1.1910 1.1805 1.80 1.2558 1.3035 1.1802 1.1712 2.00 1.2365 1.2780 1.1684 1.1609 2.20 1.2161 1.2515 1.1555 1.1499 2.40 1.1954 1.2248 1.1428 1.1388 2.60 1.1749 1.1983 1.1345 1.1276 2.80 1.1538 1.1725 1.1317 1.1167 3.00 1.1383 1.1482 1.1314 1.1054 3.20 1.1315 1.1323 1.1312 1.1015 3.40 1.1299 1.1288 1.1307 1.1065 3.60 1.1289 1.1276 1.1297 1.1195 3.80 1.1275 1.1261 1.1298 1.1327 4.00 1.1256 1.1238 1.1328 1.1453 4.20 1.1233 1.1216 1.1375 1.1572 4.40 1.1204 1.1201 1.1412 1.1682 4.60 1.1174 1.1181 1.1442 1.1780 4.80 1.1171 1.1154 1.1463 1.1864 5.00 1.1177 1.1123 1.1479 1.1932 5.20 1.1171 1.1097 1.1496 1.1982 5.40 1.1160 1.1079 1.1510 1.2013 5.60 1.1156 1.1070 1.1512 1.2033 5.80 1.1178 1.1084 1.1513 1.2090 6.00 1.1258 1.1125 1.1553 1.2193 6.20 1.1378 1.1158 1.1667 1.2304 6.40 1.1505 1.1181 1.1755 1.2392 6.60 1.1619 1.1217 1.1844 1.2469 6.80 1.1718 1.1292 1.1920 1.2522 7.00 1.1802 1.1392 1.1973 1.2548 7.20 1.1868 1.1487 1.2007 1.2548 7.40 1.1915 1.1566 1.2020 1.2520 7.60 1.1945 1.1632 1.2010 1.2465 7.80 1.1943 1.1667 1.1979 1.2385 8.00 1.1955 1.1728 1.1923 1.2271 8.20 1.2023 1.1844 1.1865 1.2147 8.40 1.2074 1.1949 1.1843 1.2073 8.60 1.2154 1.2083 1.1817 1.2067 8.80 1.2241 1.2244 1.1838 1.2139 9.00 1.2358 1.2451 1.1922 1.2272 9.20 1.2488 1.2688 1.2063 1.2364 9.40 1.2556 1.2871 1.2281 1.2481 9.60 1.2756 1.3049 1.2492 1.2544 9.80 1.3048 1.3223 1.2684 1.2639 10.00 1.3347 1.3467 1.2863 1.2798 10.20 1.3612 1.3811 1.3020 1.2953 10.40 1.3847 1.4092 1.3146 1.3075 10.60 1.4044 1.4326 1.3242 1.3171 10.80 1.4243 1.4563 1.3321 1.3269 11.00 1.4364 1.4785 1.3368 1.3325 11.20 1.4266 1.4827 1.3304 1.3225 11.40 1.3723 1.4282 1.2916 1.2820 11.60 1.3207 1.3862 1.2473 1.2369 11.80 1.3209 1.3826 1.2260 1.2176 12.00 (core too\ 1.3099 1.3776 1.2456 1.2470 Note: W(Z) values at 20000 MWD/MTU may be applied to cycle burnups greater than 20000 MWD/MTU to prevent W(Z) function ex1rapolation

COLR BRAIDWOOD 1 Revision 17 Page 8 of 15 CORE OPERATING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 Table 2.6.2.b W(Z) versus Core Height for Expanded AFD Acceptable Operation Limits in Figure 2.8.1.b (Top and Bottom 8% Excluded per Braidwood SR 3.2.1.2 Bases)

Height 150 4000 14000 20000 lfeet) MWD/MTU MWD/MTU MWD/MTU MWD/MTU 0.00 (core bottom) 1.4330 1.4875 1.3002 1.2934 0.20 1.4012 1.4765 1.2938 1.2833 0.40 1.3889 1.4715 1.2956 1.2833 0.60 1.3909 1.4703 1.3023 1.2892 0.80 1.3992 1.4714 1.3145 1.3021 1.00 1.3929 1.4615 1.3172 1.3052 1.20 1.3809 1.4436 1.3102 1.2976 1.40 1.3639 1.4213 1.2994 1.2859 1.60 1.3439 1.3973 1.2884 1.2744 1.80 1.3240 1.3715 1.2764 1.2620 2.00 1.3026 1.3439 1.2631 1.2483 2.20 1.2811 1.3152 1.2488 1.2335 2.40 1.2617 1.2862 1.2340 1.2182 2.60 1.2423 1.2573 1.2191 1.2027 2.80 1.2221 1.2307 1.2036 1.1857 3.00 1.2051 1.2117 1.1922 1.1746 3.20 1.1940 1.1990 1.1865 1.1737 3.40 1.1878 1.1884 1.1831 1.1784 3.60 1.1837 1.1819 1.1808 1.1825 3.80 1.1791 1.1754 1.1816 1.1884 4.00 1.1744 1.1700 1.1831 1.1952 4.20 1.1700 1.1660 1.1835 1.2009 4.40 1.1648 1.1609 1.1832 1.2055 4.60 1.1590 1.1550 1.1818 1.2087 4.80 1.1524 1.1485 1.1794 1.2100 5.00 1.1451 1.1411 1.1757 1.2113 5.20 1.1372 1.1333 1.1709 1.2123.

5.40 1.1285 1.1253 1.1646 1.2113 5.60 1.1178 1.1170 1.1563 1.2136 5.80 1.1174 1.1115 1.1586 1.2240 6.00 1.1261 1.1120 1.1709 1.2389 6.20 1.1377 1.1159 1.1847 1.2526 6.40 1.1504 1.1181 1.1960 1.2633 6.60 1.1617 1.1235 1.2053 1.2710 6.80 1.1715 1.1301 1.2123 1.2759 7.00 1.1798 1.1385 1.2170 1.2776 7.20 1.1863 1.1483 1.2192 1.2761 7.40 1.1909 1.1562 1.2189 1.2715 7.60 1.1938 1.1628 1.2164 1.2641 7.80 1.1936 1.1662 1.2097 1.2520 8.00 1.1947 1.1723 1.2058 1.2418 8.20 1.2015 1.1840 1.2056 1.2364 8.40 1.2067 1.1945 1.2048 1.2290 8.60 1.2146 1.2079 1.2057 1.2286 8.80 1.2239 1.2244 1.2124 1.2286 9.00 1.2361 1.2455 1.2256 1.2265 9.20 1.2491 1.2691 1.2403 1.2255 9.40 1.2558 1.2875 1.2500 1.2339 9.60 1.2760 1.3052 1.2595 1.2541 9.80 1.3052 1.3226 1.2663 1.2765 10.00 1.3349 1.3470 1.2695 1.2961 10.20 1.3611 1.3812 1.2748 1.3137 10.40 1.3843 1.4091 1.2877 1.3278 10.60 1.4038 1.4324 1.2996 1.3395 10.80 1.4234 1.4559 1.3104 1.3512 11.00 1.4353 1.4779 1.3175 1.3574 11.20 1.4252 1.4820 1.3118 1.3475 11.40 1.3708 1.4273 1.2762 1.3078 11.60 1.3191 1.3852 1.2343 1.2625 11.80 1.3191 1.3815 1.2145 1.2433 12.00 (core top) 1.3079 1.3763 1.2340 1.2722 Note: W(Z) values at 20000 MWD/MTU may be applied to cycle burn ups greater than 20000 MWD/MTU to prevent W(Z) function extrapolation

COLR BRAIDWOOD 1 Revision 17 Page 9 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 Table 2.6.2.c Penalty Factors in Excess of 2%

Cycle Burnup Penalty Factor (MWD/MTU) Fco(z) 0 1.0200 150 1.0560 371 1.0640 592 1.0622 812 1.0595 1254 1.0528 1475 1.0461 1695 1.0383 2137 1.0240 2358 1.0200 5669 1.0200 6111 1.0285 6553 1.0378 6773 1.0415 7215 1.0395 8098 1.0200 8981 1.0200 9202 1.0253 9423 1.0248 10527 1.0200 Notes:

Linear interpolation is adequate for intermediate cycle burnups.

All cycle burnups outside the range of Table 2.6.2.c shall use a 2% penalty factor for compliance with the 3.2.1.2 Surveillance Requirements.

COLR BRAIDWOOD l Revision 17 Page 10 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT l CYCLE 23 2.7 Nuclear Enthalpy Rise Hot Channel Factor (FNL\H} (LCO 3.2.2) where: P = the ratio ofTHERMAL POWER to RATED THERMAL POWER (RTP)

F~~P = 1.70 PFL\H = 0.3

2.7.2 Uncertainty

The uncertainty, LiFL\H, to be applied to the Nuclear Enthalpy Rise Hot Channel Factor FNL\H shall be calculated by the following formula:

where:

UFLJHm = =

Base FNL\H measurement uncertainty 1.04 when PDMS is inoperable (UFL\Hm is defined by PDMS and cannot be less than 1.04 when OPERABLE.)

2.7.3 PDMS Alarms:

FNL\H Warning Setpoint = 2% FNL\H Margin FNL\H Alarm Setpoint = 0% FNL\H Margin 2.8 AXIAL FLUX DIFFERENCE (AFD) (LCO 3.2.3) 2.8.1 The AXIAL FLUX DIFFERENCE (AFD) Acceptable Operation Limits are provided in the Figures described below.

a) Figure 2.8.1.a is the Normal AFD Acceptable Operation Limits associated with the W(Z) values in Table 2.6.2.a. Prior to changing to Figure 2.8.1.a, confirm that the plant is within the specified AFD envelope.

b) Figure 2.8.1.b is the Expanded AFD Acceptable Operation Limits associated with the W(Z) values in Table 2.6.2.b.

2.9 Departure from Nucleate Boiling Ratio (DNBR) (LCO 3.2.5) 2.9.1 DNBRAPSL;?: 1.563 The Axial Power Shape Limiting DNBR (DNBRAPSL) is applicable with THERMAL POWER

?
50% RTP when PDMS is OPERABLE.

2.9.2 PDMS Alarms:

DNBR Warning Setpoint = 2% DNBR Margin DNBR Alarm Setpoint = 0% DNBR Margin

COLR BRAIDWOOD 1 Revision 17 Page 11 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 Figure 2.8.1.a:

Normal Axial Flux Difference Limits as a Function of Rated Thermal Power Normal Axial Flux Difference Limits 120 1 (-10, 1aai I I (+10, 1aai I I

100

\

0:::

LU 3:

0

0. 80 Una cceptab e / U1 acceptc ble Jperat1c n II 01 Deration

...I

<C

!?!

0::: Acee )table

\ \

LU

c 60 I-C Oper ation

\

LU

!;; I I 40 I (+25, 50) I 0::: I (-20, SO) I 0

';ft.

20 0 ' ' ' I

-50 -40 -30 -20 -10 0 10 20 30 40 so AXIAL FLUX DIFFERENCE (%}

COLR BRAIDWOOD 1 Revision 17 Page 12 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 Figure 2.8.1.b:

Expanded Axial Flux Difference Limits as a Function of Rated Thermal Power Expanded Axial Flux Difference Limits 120 I

I (-1s, 100) I 1 (+10, 100) I 100 cc:

w 3:

0 Una:cceptab e I I \\ U1~accept, ble Q. 80 Dperatic n V

...I 01

  • eration

<(

E cc: Acee >table \

w 60 ~

c I-C

/ Oper ation

\

w t=c 40 II (-35 SO) II I I I (+25, 50) I cc: '

....0

'cfl.

20 0

-50 -40 -30 -20 -10 0 10 20 30 40 so AXIAL FLUX DIFFERENCE (%}

COLR BRAIDWOOD 1 Revision 17 Page 13 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 2.10 Reactor Trip System (RTS) Instrumentation (LCO 3.3.1) - Overtemperature ~T Setpoint Parameter Values 2.10.1 The Overtemperature ~T reactor trip setpoint K1 shall be equal to 1.325.

2.10.2 The Overtemperature ~T reactor trip setpoint Tav9 coefficient K2 shall be equal to 0.0297 / °F.

2.10.3 The Overtemperature ~ T reactor trip setpoint pressure coefficient K3 shall be equal to 0.00135 I psi.

2.10.4 The nominal Tav 9 at RTP (indicated) T' shall be less than or equal to 588.0 °F.

2.10.5 The nominal RCS operating pressure (indicated) P' shall be equal to 2235 psig.

2.10.6 The measured reactor vessel ~T lead/lag time constant ,1 shall be equal to 8 sec.

2.10. 7 The measured reactor vessel ~T lead/lag time constant ,2 shall be equal to 3 sec.

2.10.8 The measured reactor vessel ~T lag time constant ,3 shall be less than or equal to 2 sec.

2.10. 9 The measured reactor vessel average temperature lead/lag time constant ,4 shall be equal to 33 sec.

2.10.10 The measured reactor vessel average temperature lead/lag time constant ,s shall be equal to 4 sec.

2.10.11 The measured reactor vessel average temperature lag time constant ,5 shall be less than or equal to 2 sec.

2.10.12 The f1 (~I) "positive" breakpoint shall be +10% ~I.

2.10.13 The f1 (~I) "negative" breakpoint shall be -18% ~I.

2.10.14 The f1 (~I) "positive" slope shall be +3.47% / % ~I.

2.10.15 The f1 (~I) "negative" slope shall be -2.61 % / % ~I.

COLR BRAIDWOOD 1 Revision 17 Page 14 of 15 CORE OPERATING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 2.11 Reactor Trip System (RTS) Instrumentation (LCO 3.3.1) - Overpower~T Setpoint Parameter Values 2.11.1 The Overpower~T reactor trip setpoint K4 shall be equal to 1.072.

2.11.2 The Overpower~T reactor trip setpoint Tavg rate/lag coefficient Ks shall be equal to 0.02 I °F for increasing Tav9.

2.11.3 The Overpower~T reactor trip setpoint Tav9 rate/lag coefficient Ks shall be equal to 0 I °F for decreasing Tav9

  • 2.11.4 The Overpower~T reactor trip setpoint Tav9 heatup coefficient Ks shall be equal to .

0.00245 I °F when T > T".

2.11.5 The Overpower~T reactor trip setpoint Tav9 heatup coefficient Ks shall be equal to O / °F when T~T".

2.11.6 The nominal Tavg at RTP (indicated) T" shall be less than or equal to 588.0 °F.

2.11. 7 The measured reactor vessel ~T lead/lag time constant ,1 shall be equal to 8 sec.

2.11.8 The measured reactor vessel ~ T lead/lag time constant ,2 shall be equal to 3 sec.

2.11.9 The measured reactor vessel ~T lag time constant ,3 shall be less than or equal to 2 sec.

2.11.10 The measured reactor vessel average temperature lag time constant ts shall be less than or equal to 2 sec.

2.11.11 The measured reactor vessel average temperature rate/lag time constant ,1 shall be equal to 10 sec.

2.11.12 The fa (~I) "positive" breakpoint shall be O for all ~I.

2.11.13 The fa (~I) "negative" breakpoint shall be O for all ~I.

2.11.14 The fa (~I) "positive" slope shall be Ofor all ~I.

2.11.15 The fa (~I) "negative" slope shall be Ofor all ~I.

COLR BRAIDWOOD 1 Revision 17 Page 15 of 15 CORE OPERA TING LIMITS REPORT (COLR) for BRAIDWOOD UNIT 1 CYCLE 23 2.12 Reactor Coolant System (RCS) Pressure, Temperature, and Flow Departure from Nucleate Boiling <DNB) Limits (LCO 3.4.1) 2.12.1 The pressurizer pressure shall be greater than or equal to 2209 psig.

2.12.2 The RCS average temperature (T av9 ) shall be less than or equal to 593.1 °F.

2.12.3 The RCS total flow rate shall be greater than or equal to 386,000 gpm.

2.13 Boron Concentration 2.13.1 The refueling boron concentration shall be greater than or equal to the applicable value given in the Table below (LCO 3.9.1 ). The reported "prior to initial criticality" value also bounds the end-of-cycle requirements for the previous cycle.

2.13.2 To maintain keff:,; 0.987 with all shutdown and control rods fully withdrawn in MODES 3, 4, or 5 (TRM TLCO 3.1.g Required Action B.2 and TRM TLCO 3.1.k.2), the Reactor Coolant System boron concentration shall be greater than or equal to the applicable value given in the Table below.

COLR Conditions Boron Concentration Section (ppm) 2.13.1 a) prior to initial criticality 1754 b) for cycle burnups ~ 0 MWD/MTU 1900 and < 16000 MWD/MTU c) for cycle burnups ~ 16000 MWD/MTU 1480 2.13.2 a) prior to initial criticality 1853 b) for cycle burnups ~ 0 MWD/MTU and < 16000 MWD/MTU 2126 c) for cycle burnups ~ 16000 1609 MWD/MTU

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