View source for CP-202300201, (CPNPP) - Core Operating Limits Report (Colr), Unit 2 Cycle 21, (ERX-23-001, Revision 0)

{{Adams
| number = ML23124A117
| issue date = 05/04/2023
| title = (CPNPP) - Core Operating Limits Report (Colr), Unit 2 Cycle 21, (ERX-23-001, Revision 0)
| author name = Hicks J
| author affiliation = Luminant, Vistra Operating Co., LLC (VistraOpCo)
| addressee name = 
| addressee affiliation = NRC/NRR, NRC/Document Control Desk
| docket = 05000446
| license number = 
| contact person = 
| case reference number = CP-202300201, TXX-23028
| document report number = ERX-23-001, Rev.. 0
| document type = Fuel Cycle Reload Report, Letter type:CP
| page count = 1
}}

=Text=
{{#Wiki_filter:m                                                       Jack C. Hicks Manager, Regulatory Affairs Comanche Peak Nuclear Power Plant (Vistra Operations Luminant Company LLC)
P.O. Box 1002 6322 North FM 56 Glen Rose, TX 76043 T 254.897.6725 CP-202300201 TXX-23028 May 4th, 2023 A TIN: Document Control Desk                                                     Ref 10 CFR 50.36(c)(5)
U. S. Nuclear Regulatory Commission Washington, DC 20555-0001

==Subject:==
Comanche Peak Nuclear Power Plant (CPNPP)
Docket No. 50-446 Core Operating Limits Report (COLR), Unit 2 Cycle 21, (ERX-23-001, Revision 0)

==Dear Sir of Madam:==

Enclosed is the Core Operating Limits Report (COLR) for Comanche Peak Nuclear Power Plant (CPNPP) Unit 2, Cycle 21, (ERX-23-001, Rev. 0). This report is prepared and submitted pursuant to Technical Specification 5.6.5.
This communication contains no new commihnents regarding CPNPP Unit 2.
Should you have any questions, please contact Nie Boehmisch at (254) 897-5064 or nicholas.boelunisch@luminant.com.

TXX-23028 Page 2 of 2 Sincerely,

==Enclosure:==
Unit 2 Cycle 21 Core Operating Limits Report, (ERX-23-001, Rev. 0) c (email) - Robert Lewis, Region IV [Robert.Lewis@nrc.gov]
Dennis Galvin, NRR [Dennis.Galvin@nrc.gov]
John Ellegood, Senior Resident Inspector, CPNPP Uohn.Ellegood@nrc.gov]
David Nani, Resident Inspector, CPNPP [David.Nani@nrc.gov]

ZRX-29-001, Rev. 0 G9N2P UNIT 2 CyCU8 21 CORE OPERATING LD&#xa3;ITS         REPORT Niril   2023
                                                   ,;,.=       q-/?'-ZaZ3 Engineer , Westinghouse         Electric      Gang>any, LLC .
,,,,,, Daniel
          \:sSCS#b    E . Brozak
                                                   ,b,      . 't/it/zoea Principal       Engineer   , Westinghouse      Electric     Con>any , LLC .
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,,, Parvez        Salih M'HJ               , ,,b,       44//7/2023 Principal       Engineer   , Westinghouse      Electric     Conpany , T,Tn .
Approved,      K&M /&hZ                            Date , 4/1 8/2023 Kevin N, Roland, Manager Westinghouse        Integrated    Site  Engineering        - TX/KS

DISCLAIMER The information contained in this report was prepared for the specific requirement of Vistra Operations Company LLC and may not be appropriate for use in situations other than those for which it was specifically prepared. Vistra Operations Company LLC PROVIDES NO WARRANTY HEREUNDER, EXPRESS OR IMPLIED, OR STATUTORY, OF ANY KIND OR NATURE WHATSOEVER, REGARDING THIS REPORT OR ITS USE, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES ON MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
By making this report available, Vistra Operations Company LLC does not authorize its use by others, and any such use is forbidden except with the prior written approval of Vistra Operations Company LLC. Any such written approval shall itself be deemed to incorporate the disclaimers of liability and disclaimers of warranties provided herein. In no event shall Vistra Operations Company LLC have any liability for any incidental or  consequential  damages  of  any   type in connection  with  the  use, authorized or unauthorized, of this report or of the information in it.
ii               ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 TABLE OF CONTENTS DISCLAIMER ...................................................... ii TABLE OF CONTENTS ............................................... iii LIST OF TABLES .................................................. iv LIST OF FIGURES .................................................      v SECTION                                                             PAGE 1.0  CORE OPERATING LIMITS REPORT   .............................. 1 2.0  OPERATING LIMITS   .......................................... 2 2.1   SAFETY LIMITS (SLs) ................................... 2 2.2   SHUTDOWN MARGIN (SDM) ................................. 2 2.3   MODERATOR TEMPERATURE COEFFICIENT (MTC) ..............      2 2.4   ROD GROUP ALIGNMENT LIMITS ...........................      3 2.5   SHUTDOWN BANK INSERTION LIMITS .......................      3 2.6   CONTROL BANK INSERTION LIMITS ........................      4 2.7   PHYSICS TESTS EXCEPTIONS - MODE 2 ....................      4 2.8   HEAT FLUX HOT CHANNEL FACTOR (FQ(Z)) .................. 4 2.9   NUCLEAR ENTHALPY RISE HOT CHANNEL FACTOR (FNH) ........ 6 2.10 AXIAL FLUX DIFFERENCE (AFD) ..........................       6 2.11 REACTOR TRIP SYSTEM (RTS) INSTRUMENTATION ............       6 2.12 RCS PRESSURE, TEMPERATURE, AND FLOW DEPARTURE FROM NUCLEATE BOILING (DNB) LIMITS ........................      7 2.13 BORON CONCENTRATION ..................................       8

==3.0  REFERENCES==
  ................................................      8 iii                ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 LIST OF TABLES TABLE                                                               PAGE 1     FQ(Z) MARGIN DECREASES IN EXCESS OF 2% PER 31 EFPD .......... 9 iv                ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 LIST OF FIGURES FIGURE                                                              PAGE 1    REACTOR CORE SAFETY LIMITS   .............................. 10 2    ROD BANK INSERTION LIMITS VERSUS THERMAL POWER   .......... 11 3    K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT  ............................................. 12 4    W(Z) AS A FUNCTION OF CORE HEIGHT -
(150 MWD/MTU)  ........................................... 13 5    W(Z) AS A FUNCTION OF CORE HEIGHT -
(5,000 MWD/MTU)  ......................................... 14 6    W(Z) AS A FUNCTION OF CORE HEIGHT -
(11,000 MWD/MTU)  ........................................ 15 7    W(Z) AS A FUNCTION OF CORE HEIGHT -
(14,000 MWD/MTU)  ........................................ 16 8    W(Z) AS A FUNCTION OF CORE HEIGHT -
(20,000 MWD/MTU)  ........................................ 17 9    AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER  .................................. 18 v                 ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 1.0  CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for CPNPP UNIT 2 CYCLE 21 has been prepared in accordance with the requirements of Technical Specification 5.6.5.
The Technical Specifications affected by this report are listed below:
SL 2.1      SAFETY LIMITS (SLs)
LCO 3.1.1   SHUTDOWN MARGIN (SDM)
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 (FQ(Z))
LCO 3.2.2   NUCLEAR ENTHALPY RISE HOT CHANNEL FACTOR (FNH)
LCO 3.2.3   AXIAL FLUX DIFFERENCE (AFD)
LCO 3.3.1   REACTOR TRIP SYSTEM (RTS) INSTRUMENTATION LCO 3.4.1   RCS PRESSURE, TEMPERATURE, AND FLOW DEPARTURE FROM NUCLEATE BOILING (DNB) LIMITS LCO 3.9.1   BORON CONCENTRATION 1                  ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 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 Technical Specification 5.6.5b, Items 1 through 4 and 7 through 15.
These limits have been determined such that all applicable limits of the safety analysis are met.
2.1  SAFETY LIMITS (SLs)   (SL 2.1) 2.1.1  In MODES 1 and 2, the combination of thermal power, reactor coolant system highest loop average temperature, and pressurizer pressure shall not exceed the safety limits specified in Figure 1.
2.2  SHUTDOWN MARGIN (SDM)   (LCO 3.1.1) 2.2.1  The SDM shall be greater than or equal to 1.3% k/k in MODE 2 with Keff < 1.0, and in MODES 3, 4, and 5.
2.3  MODERATOR TEMPERATURE COEFFICIENT (MTC)    (LCO 3.1.3) 2.3.1  The MTC upper and lower limits, respectively, are:
The BOL/ARO/HZP-MTC shall be less positive than +5 pcm/&deg;F.
The EOL/ARO/RTP-MTC shall be less negative than -40 pcm/&deg;F.
2                   ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 2.3.2  SR 3.1.3.2 The MTC surveillance limit is:
The 300 ppm/ARO/RTP-MTC shall be less negative than or equal to -31 pcm/&deg;F.
The 60 ppm/ARO/RTP-MTC shall be less negative than or equal to -38 pcm/&deg;F.
where: BOL stands for Beginning of Cycle Life ARO stands for All Rods Out HZP stands for Hot Zero THERMAL POWER EOL stands for End of Cycle Life RTP stands for RATED THERMAL POWER 2.4 ROD GROUP ALIGNMENT LIMITS   (LCO 3.1.4) 2.4.1  The SDM shall be greater than or equal to 1.3% k/k in MODES 1 and 2.
2.5 SHUTDOWN BANK INSERTION LIMITS   (LCO 3.1.5) 2.5.1  The shutdown rods shall be fully withdrawn. Fully withdrawn shall be the condition where shutdown rods are at a position within the interval of 218 and 231 steps withdrawn, inclusive.
2.5.2  The SDM shall be greater than or equal to 1.3% k/k in MODE 1, MODE 2 with any control bank not fully inserted.
3                  ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 2.6 CONTROL BANK INSERTION LIMITS      (LCO 3.1.6) 2.6.1  The control banks shall be limited in physical insertion as shown in Figure 2.
2.6.2  The control banks shall always be withdrawn and inserted in the prescribed sequence.      For withdrawal, the sequence is control bank A, control bank B, control bank C, and control bank D. The insertion sequence is the reverse of the withdrawal sequence.
2.6.3  A 115 step Tip-to-Tip relationship between each sequential control bank shall be maintained.
2.6.4  The SDM shall be greater than or equal to 1.3% k/k in MODE 1, MODE 2 with keff  1.0.
2.7 PHYSICS TESTS EXCEPTIONS - MODE 2      (LCO 3.1.8) 2.7.1  The SDM shall be greater than or equal to 1.3% k/k in MODE 2 during PHYSICS TESTS.
2.8 HEAT FLUX HOT CHANNEL FACTOR (FQ(Z))      (LCO 3.2.1)
FQRTP 2.8.1  FQ(Z)               [K(Z)] for P > 0.5 P
FQRTP FQ(Z)               [K(Z)] for P  0.5

===0.5 where===
P =      THERMAL POWER RATED THERMAL POWER 4                   ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 2.8.2 FQRTP = 2.50 2.8.3 K(Z) is provided in Figure 3.
2.8.4 Elevation and burnup dependent W(Z) values are provided in Figures 4, 5, 6, 7 and 8. For W(Z) data at a desired burnup not listed in the figures, but less than the maximum listed burnup, values at 3 or more burnup steps should be used to interpolate the W(Z) data to the desired burnup with a polynomial type fit that uses the nearest three burnup steps. For W(Z) data at a desired burnup outside of the listed burnup steps, a linear extrapolation of the W(Z) data for the nearest two burnup steps can be used.
2.8.5 SR 3.2.1.2 If the two most recent FQ(Z) evaluations show an increase in the expression maximum over Z       [ FQC(Z) / K(Z) ],
the burnup dependent values in Table 1 shall be used instead of a constant 2% to increase FQW(Z) per Surveillance Requirement 3.2.1.2, Note a. A constant factor of 2% shall be used for all cycle burnups that are outside the range of Table 1.
5                 ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 2.9  NUCLEAR ENTHALPY RISE HOT CHANNEL FACTOR (FNH)        (LCO 3.2.2) 2.9.1  FNH      FRTPH [1 + PFH (1-P)]
where: P =         THERMAL POWER RATED THERMAL POWER 2.9.2  FRTPH =   1.60 for all Fuel Assembly Regions 2.9.3  PFH =     0.3 2.10 AXIAL FLUX DIFFERENCE (AFD)        (LCO 3.2.3) 2.10.1 The AFD Acceptable Operation Limits are provided in Figure 9.
2.11 REACTOR TRIP SYSTEM (RTS) INSTRUMENTATION        (LCO 3.3.1) 2.11.1 The numerical values pertaining to the Overtemperature N-16 reactor trip setpoint are listed below; K1      = 1.15 K2      = 0.0139 /oF K3      = 0.00071 /psig Tc o    = indicated loop specific Tc at Rated Thermal Power, &deg;F P1       2235 psig 1       10 sec 2       3 sec f1(q) = -2.78  {(qt-qb) + 18%}      when (qt-qb)  -18% RTP
                     = 0%    when -18% RTP < (qt-qb) < +10.0% RTP
                     = 2.34  {(qt-qb) - 10.0%}    when (qt-qb)  +10.0% RTP 6                   ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 2.12 RCS PRESSURE, TEMPERATURE, AND FLOW DEPARTURE FROM NUCLEATE BOILING (DNB) LIMITS (LCO 3.4.1) 2.12.1 RCS DNB parameters for pressurizer pressure, RCS average temperature, and RCS total flow rate shall be within the surveillance limits specified below:
2.12.2 SR 3.4.1.1 Pressurizer pressure    2220 psig (4 channels) 2222 psig (3 channels)
The pressurizer pressure limits correspond to the analytical limit of 2205 psig used in the safety analysis with allowance for measurement uncertainty. These uncertainties are based on the use of control board indications and the number of available channels.
2.12.3 SR 3.4.1.2 RCS average temperature     592 oF (4 channels) 591 oF (3 channels)
The RCS average temperature limits correspond to the analytical limit of 595.2 oF which is bounded by that used in the safety analysis with allowance for measurement uncertainty. These uncertainties are based on the use of control board indications and the number of available channels.
7                   ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 2.12.4 SR 3.4.1.3 The RCS total flow rate shall be  408,000 gpm.
2.12.5 SR 3.4.1.4 The RCS total flow rate based on precision heat balance shall be  408,000 gpm.
The required RCS flow, based on an elbow tap differential pressure instrument measurement prior to MODE 1 after the refueling outage, shall be greater than 327,000 gpm.
2.13 BORON CONCENTRATION  (LCO 3.9.1) 2.13.1 The required refueling boron concentration is  1915 ppm.

==3.0  REFERENCES==

Technical Specification 5.6.5.
8                  ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 Table 1 FQ(Z) MARGIN DECREASES IN EXCESS OF 2% PER 31 EFPD Cycle       Maximum Decrease Burnup        In FQ(Z) MARGIN (MWD/MTU)          (Percent) 0               3.11 150              3.11 366              5.76 581              7.82 797              8.28 1012              8.17 1228              7.51 1444              6.54 1659              5.45 1875              4.52 2091              4.40 2306              4.05 2522              3.47 2737              2.86 2953              2.27 3169              2.00 6834              2.00 7050              2.22 7265              2.58 7481              2.95 7697              3.24 7912              3.37 8128              2.00 Note: All cycle burnups outside the range of the table shall use a constant 2% decrease in FQ(Z) margin for compliance with Surveillance Requirement 3.2.1.2, Note a. Linear interpolation is acceptable to determine the FQ(Z) margin decrease for cycle burnups which fall between the specified burnups.
9                      ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 Figure 1 Reactor Core Safety Limits 680 2445 psig 660 Unacceptable 2235 psig 640 RCS Average Temperature (&deg;F) 1985 psig 1845 psig 620 Acceptable 600 580 560 0           20        40       60       80        100         120     140 Percent of Rated Thermal Power 10                        ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 2 ROD BANK INSERTION LIMITS VERSUS THERMAL POWER 240 220                                 (25.3,218)                                 (79.6,218) 200 BANK B ROD BANK POSITION (steps withdrawn) 180 160        (0,164)
(100,146) 140 BANK C 120 100 80 BANK D 60 (0,49) 40 20 (31,0) 0 0         10       20         30       40    50       60   70      80         90         100 PERCENT OF RATED THERMAL POWER NOTES:                                      1.        Fully withdrawn shall be the condition where control rods are at a position within the interval of 218 and 231 steps withdrawn, inclusive.
: 2.        Control Bank A shall be fully withdrawn.
11                        ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 3 K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT 1.1 1.0 0.9 0.8 K(Z) - NORMALIZED FQ(Z) 0.7 0.6 0.5 Core Height (ft)       K(Z) 0.4                           0.0                    1.0000 6.0                    1.0000 12.0                   0.9250 0.3 0.2 0.1 0.0 0    1   2   3    4      5     6    7      8       9    10   11    12 BOTTOM                CORE HEIGHT (FEET)                          TOP 12                          ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 4 W(Z) AS A FUNCTION OF CORE HEIGHT (150 MWD/MTU) 1.650 1.600 1.550 1.500 1.450 MAXIMUM W(Z) 1.400 1.350 1.300 1.250 1.200 1.150 1.100 1.050 1.000 0   1     2     3       4      5      6      7     8       9   10      11    12 BOTTOM                  CORE HEIGHT (FEET)                                  TOP Axial                Axial                     Axial                Axial Node      W(Z)       Node         W(Z)         Node     W(Z)        Node      W(Z) 58 - 61     ---        44         1.1660         30     1.1462        16      1.1844 57      1.2133       43         1.1707         29     1.1459        15      1.2017 56      1.2121       42         1.1730         28     1.1483        14      1.2212 55      1.2093       41         1.1788         27     1.1534        13      1.2399 54      1.2112       40         1.1842         26     1.1569        12      1.2588 53      1.2159       39         1.1864         25     1.1595        11      1.2774 52      1.2135       38         1.1871         24     1.1611        10      1.2954 51      1.2085       37         1.1853         23     1.1623         9      1.3120 50      1.1991       36         1.1819         22     1.1629         8      1.3274 49      1.1916       35         1.1769         21     1.1630         7      1.3409 48      1.1837       34         1.1698         20     1.1622         6      1.3518 47      1.1753       33         1.1617         19     1.1648         5      1.3617 46      1.1720       32         1.1553         18     1.1714       1 - 4      ---
45      1.1651       31         1.1486         17     1.1762 Core Height (ft) = (Node - 1)
* 0.2012 13                             ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 5 W(Z) AS A FUNCTION OF CORE HEIGHT (5,000 MWD/MTU) 1.650 1.600 1.550 1.500 1.450 1.400 MAXIMUM W(Z) 1.350 1.300 1.250 1.200 1.150 1.100 1.050 1.000 0   1    2      3   4       5      6     7      8       9   10      11    12 BOTTOM                  CORE HEIGHT (FEET)                               TOP Axial                Axial                  Axial                Axial Node      W(Z)       Node      W(Z)         Node     W(Z)        Node      W(Z) 58 - 61     ---        44      1.1529         30     1.1156        16      1.2041 57      1.2355       43      1.1547         29     1.1172        15      1.2148 56      1.2320       42      1.1558         28     1.1207        14      1.2380 55      1.2276       41      1.1548         27     1.1280        13      1.2640 54      1.2205       40      1.1534         26     1.1347        12      1.2902 53      1.2124       39      1.1487         25     1.1408        11      1.3160 52      1.2071       38      1.1451         24     1.1464        10      1.3412 51      1.1993       37      1.1397         23     1.1515         9      1.3647 50      1.1916       36      1.1330         22     1.1560         8      1.3865 49      1.1852       35      1.1267         21     1.1638         7      1.4059 48      1.1763       34      1.1226         20     1.1740         6      1.4220 47      1.1684       33      1.1198         19     1.1827         5      1.4355 46      1.1598       32      1.1185         18     1.1907       1 - 4      ---
45      1.1533       31      1.1166         17     1.1980 Core Height (ft) = (Node - 1)
* 0.2012 14                             ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 6 W(Z) AS A FUNCTION OF CORE HEIGHT (11,000 MWD/MTU) 1.650 1.600 1.550 1.500 1.450 MAXIMUM W(Z) 1.400 1.350 1.300 1.250 1.200 1.150 1.100 1.050 1.000 0     1      2    3       4    5        6   7      8     9     10     11       12 BOTTOM                        CORE HEIGHT (FEET)                             TOP Axial                   Axial                  Axial                Axial Node        W(Z)        Node      W(Z)         Node     W(Z)        Node      W(Z) 58 - 61       ---         44      1.2481         30     1.1362        16      1.1410 57        1.3135        43      1.2444         29     1.1313        15      1.1492 56        1.3104        42      1.2421         28     1.1329        14      1.1613 55        1.3125        41      1.2341         27     1.1336        13      1.1744 54        1.3119        40      1.2271         26     1.1338        12      1.1880 53        1.3127        39      1.2193         25     1.1341        11      1.2005 52        1.3092        38      1.2167         24     1.1338        10      1.2145 51        1.3061        37      1.2138         23     1.1329         9      1.2285 50        1.2998        36      1.2074         22     1.1313         8      1.2416 49        1.2901        35      1.1994         21     1.1307         7      1.2532 48        1.2816        34      1.1893         20     1.1322         6      1.2625 47        1.2721        33      1.1772         19     1.1344         5      1.2699 46        1.2645        32      1.1634         18     1.1361       1 - 4      ---
45        1.2564        31      1.1483         17     1.1372 Core Height (ft) = (Node - 1)
* 0.2012 15                               ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 7 W(Z) AS A FUNCTION OF CORE HEIGHT (14,000 MWD/MTU) 1.650 1.600 1.550 1.500 1.450 MAXIMUM W(Z) 1.400 1.350 1.300 1.250 1.200 1.150 1.100 1.050 1.000 0     1      2    3       4    5        6   7      8     9     10     11       12 BOTTOM                        CORE HEIGHT (FEET)                             TOP Axial                   Axial                  Axial                Axial Node        W(Z)        Node      W(Z)         Node     W(Z)        Node      W(Z) 58 - 61       ---         44      1.2348         30     1.1597        16      1.1426 57        1.3002        43      1.2299         29     1.1590        15      1.1560 56        1.2952        42      1.2302         28     1.1621        14      1.1695 55        1.3029        41      1.2266         27     1.1638        13      1.1833 54        1.3003        40      1.2265         26     1.1641        12      1.1973 53        1.2922        39      1.2248         25     1.1633        11      1.2099 52        1.2899        38      1.2259         24     1.1613        10      1.2218 51        1.2861        37      1.2261         23     1.1582         9      1.2334 50        1.2787        36      1.2226         22     1.1543         8      1.2444 49        1.2722        35      1.2173         21     1.1500         7      1.2541 48        1.2654        34      1.2096         20     1.1440         6      1.2618 47        1.2675        33      1.1997         19     1.1377         5      1.2679 46        1.2615        32      1.1875         18     1.1363       1 - 4      ---
45        1.2495        31      1.1739         17     1.1360 Core Height (ft) = (Node - 1)
* 0.2012 16                               ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 8 W(Z) AS A FUNCTION OF CORE HEIGHT (20,000 MWD/MTU) 1.650 1.600 1.550 1.500 1.450 MAXIMUM W(Z) 1.400 1.350 1.300 1.250 1.200 1.150 1.100 1.050 1.000 0   1     2    3       4    5    6       7     8      9    10     11     12 BOTTOM                    CORE HEIGHT (FEET)                               TOP Axial               Axial                  Axial                Axial Node   W(Z)         Node      W(Z)         Node     W(Z)        Node     W(Z) 58 --           44      1.2311         30     1.2194        16     1.1321 57   1.2456         43      1.2370         29     1.2161        15     1.1381 56   1.2463         42      1.2477         28     1.2116        14     1.1493 55   1.2506         41      1.2529         27     1.2086        13     1.1613 54   1.2460         40      1.2599         26     1.2038        12     1.1736 53   1.2388         39      1.2649         25     1.1988        11     1.1840 52   1.2359         38      1.2717         24     1.1922        10     1.1938 51   1.2367         37      1.2761         23     1.1841         9     1.2039 50   1.2355         36      1.2758         22     1.1758         8     1.2139 49   1.2334         35      1.2733         21     1.1688         7     1.2231 48   1.2304         34      1.2680         20     1.1606         6     1.2308 47   1.2425         33      1.2597         19     1.1506         5     1.2373 46   1.2525         32      1.2481         18     1.1403       1 - 4     ---
45   1.2390         31      1.2346         17     1.1330 Core Height (ft) = (Node - 1)
* 0.2012 17                              ERX-23-001, Rev. 0

COLR for CPNPP Unit 2 Cycle 21 FIGURE 9 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER 100
(-12,100)                                  (10,100) 90 UNACCEPTABLE                                                UNACCEPTABLE OPERATION                                                  OPERATION 80 ACCEPTABLE OPERATION 70 PERCENT OF RATED THERMAL POWER 60 50
(-25,50)                                                        (20,50) 40 30 20 10 0
                                   -40       -30        -20         -10         0         10        20         30     40 AXIAL FLUX DIFFERENCE (%)
18                              ERX-23-001, Rev. 0}}