ML20072K150

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Unit 2 - Unit 1 Cycle 19 and Unit 2 Cycle 18 Core Operating Limits Reports
ML20072K150
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 03/12/2020
From: Washko J
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RA20-014
Download: ML20072K150 (45)
v • d • e


Text

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._ _ _._ ......... '"' "" ' "' ............ vii Exelon Generation@

2601 North 21 " Road Marseilles, IL 61341 815-415-2000 Telephone www.exeloncorp.com RA20-014 10 CFR 50.4 March 12, 2020 U.S. Nuclear Regulatory Commission A TIN: Document Control Desk Washington, DC 20555-0001 LaSalle County Station, Unit 1 and Unit 2 Renewed Facility Operating License No. NFP-11 and NPF-18 NRC Docket No. 50-373 and 50-374

Subject:

Unit 1 Cycle 19 and Unit 2 Cycle 18 Core Operating Limits Reports In accordance with LaSalle County Station (LSCS) Technical Specifications (TS) 5.6.5.d, "CORE OPERATING LIMITS REPORT (COLR)," attached is a copy of the Unit 1 COLR revision 18 and the Unit 2 COLR revision 17. The Unit 1 COLR was revised for LSCS Unit 1 Cycle 19(L1C19). The Unit 2 COLR Cycle 18 was revised to add MCPR99.9% in accordance with NRG-approved TSTF-564 implementation and other administrative changes.

There are no regulatory commitments contained within this letter.

Should you have any questions concerning this letter, please contact Mr. Dan Mearhoff, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully,

()(A ~~~

J~Jjv&Jiko Site Vice President LaSalle County Station Attachments: LaSalle Unit 1 COLR revision 18 LaSalle Unit 2 COLR revision 17 cc: Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - LaSalle County Station

bee: NRC Project Manager - NRR (Bhalchandra Vaidya)

Joshua Shea (RE) (w/o attachment)

Armando Johnson (NFM) (w/o attachment)

DCD Licensing (hard copy and electronic)

COLR LaSalle 1 Rev 18 Core Operating Limits Report For LaSalle Unit 1 Cycle 19 Prepared By: V~-fWc-~, ~ /MM~ Date: 2/19/20 Victoria Riso/Kevin Smith~FCM Reviewed By: ~M'CRiw_

KeilYClure, NF CM Date: 2/19/2020 Reviewed By:

~b-- Date: 2/19/2020 John Simmons, ESA Reviewed By: Date: 2/19/2020 Approved By: Date: 2.Q>t-~e:ll.11>

Station Qualified Review By: Date: _2...

12.... o__

01_20....2.....

~osh Shea, RE Page 1 of22

COLR LaSalle 1 Rev 18 Table of Contents Page Revision History .................................................................................................................................... 3 List of Tables ......................................................................................................................................... 4

1. Terms and Definitions ....................................................................................................................... 5
2. General Information ........................................................................................................................... 7
3. MAPLHGR ......................................................................................................................................... 8
4. MCPR ................................................................................................................................................ 9 4.1. MCPR Limits ............................................................................................................................. 9 4.1.1. Power-Dependent MCPR .............................................................................................. 9 4.1.2. Flow-Dependent MCPR ................................................................................................ 9 4.1.3. Safety Limit MCPR ........................................................................................................ 9 4.2. Scram Time .............................................................................................................................. 10 4.3. Recirculation Flow Control Valve Settings .............................................................................. 10
5. LHGR .............................................................................................................................................. 14
6. Rod Block Monitor ........................................................................................................................... 17
7. Traversing In-Core Probe System .................................................................................................. 18 7 .1. Description .............................................................................................................................. 18 7.2. Bases ...................................................................................................................................... 18
8. Stability Protection Setpoints ........................................................................................................... 19
9. Modes of Operation ......................................................................................................................... 20
10. Methodology .................................................................................................................................. 21
11. References .................................................................................................................................... 22 Page 2 of 22

COLR LaSalle 1 Rev 18 Record of COLR LaSalle 1 Cycle 19 Revisions Revision Description 18 Initial issuance for L 1C19.

Page 3 of 22

COLR LaSalle 1 Rev 18 List of Tables Table 2-1 Cycle Exposure Range Definitions ...................................................................................... 7 Table 3-1 MAPLHGR versus Average Planar Exposure, GNF2 Fuel. ................................................. 8 Table 3-2 MAPLHGR SLO Multiplier, GNF2 Fuel. ............................................................................... 8 Table 4-1 Scram Times Required for Option A and Option B Application at Notch Position 39 ........ 10 Table 4-2 Operating Limit Minimum Critical Power Ratio (OLMCPR), GNF2 Fuel. ........................... 11 Table 4-3 Power Dependent MCPR Multipliers (KP}, GNF2 Fuel ...................................................... 12 Table 4-4 DLO Flow Dependent MCPR Limits (MCPRF), GNF2 Fuel ............................................... 13 Table 4-5 SLO Flow Dependent MCPR Limits (MCPRF), GNF2 Fuel ............................................... 13 Table 4-6 Cycle Specific SLMCPR (MCPRss.sO/o) ................................................................................ 13 Table 5-1 LHGR Limit, GNF2 Fuel. .................................................................................................... 14 Table 5-2 Power Dependent LHGR Multipliers (LHGRFACp), GNF2 Fuel, DLO and SLO .................................................................................................................... 15 Table 5-3 Flow-Dependent LHGR Multipliers (LHGRFACF}, GNF2 Fuel, BOC to EOG, Pressurization (Application Groups with 1 TCVfTSV Closed or OOS) .............................. 16 Table 5-4 Flow-Dependent LHGR Multipliers (LHGRFACF), GNF2 Fuel, BOC to EOG, No Pressurization (Application Groups with TCVfTSV ln-Service) .................................... 16 Table 6-1 Rod Block Monitor Setpoints ............................................................................................. 17 Table 8-1 OPRM PBDA Trip Setpoints .............................................................................................. 19 Table 9-1 Allowed Modes of Operation and EOOS Combinations .................................................... 20 Page 4 of 22

COLR LaSalle 1 Rev 18

1. Terms and Definitions ARO All Rods Out ARTS Average Power Range Monitor, Rod Block Monitor and Technical Specification Improvement Program BOC Beginning of cycle CRD Control rod drive DLO Dual loop operation EOC End of cycle EOOS Equipment out of service EOR End of rated - Cycle exposure corresponding to all rods out, 100% power/100%

flow, and normal feedwater temperature.

FFWfR Final feedwater temperature reduction FWHOOS Feedwater heater out of service GNF Global Nuclear Fuels - Americas ICF Increased core flow KP Power-dependent MCPR multiplier L1C19 LaSalle Unit 1 Cycle 19 LHGR Linear heat generation rate LHGRFACF Flow-dependent LHGR multiplier LHGRFACp Power-dependent LHGR multiplier LPRM Local power range monitor MAPLHGR Maximum average planar linear heat generation rate MCPR Minimum critical power ratio MCPR99.9% Limiting MCPR value such that 99.9% of the fuel in the core is not susceptible to boiling transition.

MCPRF Flow-dependent MCPR MELLLA Maximum extended load line limit analysis MOC Middle of Cycle Point for Licensing Purposes MSIVOOS Main steam isolation valve out of service OLMCPR Operating limit minimum critical power ratio oos Out of service OPRM Oscillation power range monitor PBDA Period based detection algorithm PLUOOS Power load unbalance out of service PROOS Pressure regulator out of service RPTOOS Recirculation pump trip out of service RWE Rod withdrawal error SL MC PR Safety limit minimum critical power ratio SLO Single loop operation SRVOOS Safety/relief valve out of service TBV Turbine bypass valve TBVOOS Turbine bypass valve out of service TCV Turbine control valve Page 5 of 22

COLR LaSalle 1 Rev 18 TCVIS All Turbine Control Valves/Turbine Stop Valves in-service TCVSC Turbine control valve slow closure TIP Traversing in-core probe TSV Turbine stop valve 3DM 30 Monicore Page 6 of 22

COLR LaSalle 1 Rev 18

2. General Information (Reference 7)

The data provided in this report is valid for:

  • Maximum Extended Load Line Limit down to 82.8% of rated core flow during full power operation o Rated core flow is 108.5 Mlbm/hr (Reference 6)
  • ICF to 105% of rated core flow
  • Coastdown to 40% rated power o Rated core thermal power is 3546 MWth o Operation at a power level above that which can be achieved with ARO, ICF, FFWTR, and steady-state equilibrium Xenon concentrations is not supported
  • Maximum reduction of 100°F of the feedwater temperature for FWHOOS/FFWTR Throughout this report, power and flow dependent limits are listed for various power and flow levels.

Linear interpolation is to be used to find intermediate values.

Table 2-1 defines the three exposure ranges used in the COLR. The term (EOR19 -4361 MWd/ST) means the projected Cycle 19 EOR exposure minus 4361 MWd/ST of exposure. For cycle exposure dependent limits at the exact MOC exposure, the more limiting of the BOC to MOC and the MOC to EOC limits should be used. This can be achieved by applying the MOC to EOC limits to the MOC point as all cycle exposure dependent limits in the MOC to EOC limit sets are the same as, or more limiting than, those in the BOC to MOC limit sets.

Table 2-1 Cycle Exposure Range Definitions (Reference 7)

Nomenclature Cycle Exposure Range BOC to MOC BOC19 to (EOR19-4361 MWd/ST)

MOC to EOC (EOR19-4361 MWd/ST) to EOC19 BOC to EOC BOC19 to EOC19 Page 7 of 22

COLR LaSalle 1 Rev 18

3. MAPLHGR Technical Specification Sections 3.2.1 and 3.4.1 MAPLHGR values as a function of average planar exposure are given in Table 3-1. During SLO, these limits are multiplied by the SLO multiplier listed in Table 3-2. Tables 3-1 and 3-2 provide coverage for all modes of operation.

Table 3-1 MAPLHGR versus Average Planar Exposure GNF2 Fuel (Reference 7)

Average Planar MAPLHGR Limit Exposure (kW/ft)

(GWd/ST) 0.00 13.78 17.15 13.78 60.78 6.87 63.50 5.50 Table 3-2 MAPLHGR SLO Multiplier GNF2 Fuel (Reference 7)

SLO Fuel Type MAPLHGR Multiplier GNF2 0.78 Page 8 of 22

COLR LaSalle 1 Rev 18

4. MCPR Technical Specification Sections 3.2.2. 3.3.4.1. 3.4. 1. and 3.7.7 4.1. MCPR Limits The rated OLMCPRs given in Table 4-2 are the maximum values obtained from analysis of the pressurization events, non-pressurization events, and the Option Ill stability evaluation. MCPR values are determined by the cycle-specific fuel reload analyses in Reference 7. Table 4-2 is used in conjunction with the ARTS-based power (Kp) and flow (MCPRF) dependencies presented in Tables 4-3, 4-4, and 4-5 below. The OLMCPR is determined for a given power and flow condition by evaluating the power and flow dependent MCPR values and selecting the greater of the two.

4.1.1. Power-Dependent MCPR The power-dependent MCPR multiplier, KP, is determined from Table 4-3, and is dependent only on the power level and the Application Group (EOOS). The product of the rated OLMCPR and the proper KP provides the power-dependent OLMCPR.

4.1.2. Flow-Dependent MCPR Tables 4-4 through 4-5 give the MCPRF limit as a function of the core flow, based on the applicable plant conditions. The MCPRF limit determined from these tables is the flow-dependent OLMCPR.

4.1.3. Safety Limit MCPR The cycle-specific SLMCPR, known as MCPR99.9%, can be found in Table 4-6 for dual loop and single loop operating conditions. The values in Table 4-6 were used to calculate the rated MCPR limits.

Page 9 of 22

COLR LaSalle 1 Rev 18 4.2. Scram Time Option A and Option B MCPR analyses and results are dependent upon core average control rod blade scram speed insertion times.

The Option A scram time is the Improved Technical Specification scram speed based insertion time. To utilize the MCPR limits for the Option A scram speed insertion times, the core average scram speed insertion time for 20% insertion must be less than or equal to 0.900 seconds (Reference 9) (0.875 seconds at notch position 39, Reference 10).

To utilize the MCPR limits for the Option B scram speed insertion times, the core average scram speed insertion time for 20% insertion must be less than or equal to 0.694 seconds (Reference

9) (0.672 seconds at notch position 39, Reference 10). See Table 4-1 for a summary of scram time requirements related to the use of Option A and Option B MCPR limits.

If the core average scram insertion time does not meet the Option B criteria, but is within the Option A criteria, the appropriate steady state MCPR value may be determined from a linear interpolation between the Option A and B limits with standard mathematical rounding to two decimal places. When performing the linear interpolation to determine MCPR limits, ensure that the time used for Option A is 0.900 seconds (0.875 seconds to notch position 39, Reference 10).

Table 4-1 Scram Times Required for Option A and Option B Application at Notch Position 39 (References 9 and 10)

Notch Position* Option A Option B 39  :::;; 0.875 sec.  :::;; 0.672 sec.

  • The insertion time to a notch pos1t1on 1s calculated using the CRD reed switch drop-out insertion fraction per Reference 10 and interpolation with scram time values per Reference 9.

4.3. Recirculation Flow Control Valve Settings Cycle 19 was analyzed with a maximum core flow runout of 105%; therefore, the recirculation pump flow control valves must be set to maintain core flow less than 105% (113.925 Mlbm/hr}

for all run out events (Reference 7).

Page 10 of 22

COLR LaSalle 1 Rev 18 Table 4-2 Operating Limit Minimum Critical Power Ratio (OLMCPR)

GNF2 Fuel (Reference 7)

DLO/ Exposure Application Group Option A Option B SLO Range BOC-MOC 1.41 1.37 DLO MOC-EOC 1.45 1.41 Base Case BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.47 1.39 DLO Base Case + TCVSC MOC-EOC 1.51 1.43

+ RPTOOS +

PROOS BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.44 1.40 DLO Base Case + TCVSC MOC-EOC 1.48 1.44

+ TBVOOS (all 5 valves) BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.50 1.42 Base Case + TCVSC DLO

+ TBVOOS (all 5 MOC-EOC 1.54 1.46 valves)+ RPTOOS + BOC-MOC 1.59 1.59 PROOS SLO MOC-EOC 1.59 1.59 BOC-MOC 1.41 1.37 DLO Base Case with MOC-EOC 1.45 1.41 TCVIS BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.50 1.42 DLO Base Case + TCVSC MOC-EOC 1.54 1.46

+ TBVOOS (all 5 valves) + RPTOOS + BOC-MOC 1.59 1.59 PROOS with TCVIS SLO MOC-EOC 1.59 1.59 Page 11 of22

COLR LaSalle 1 Rev 18 Table 4-3 Power Dependent MCPR Multipliers (KP)

GNF2 Fuel (Reference 7)

Core Thermal Power (% rated) 0 25 45 60 s 85 > 85 100 Application Group KP, Operating Limit MCPR Multiplier Base Case 1.156 1.156 1.156 1.156 1.045 1.045 1.000 Base Case + TCVSC

+ RPTOOS + 1.244 1.244 1.178 1.164 1.077 1.045 1.000 PRO OS Base Case + TCVSC

+ TBVOOS (all 5 1.244 1.244 1.178 1.164 1.077 1.045 1.000 valves)

Base Case + TCVSC

+ TBVOOS (all 5 1.244 1.244 1.178 1.164 1.077 1.069 1.000 valves) + RPTOOS +

PRO OS Base Case with 1.156 1.156 1.156 1.156 1.045 1.045 1.000 TCVIS Base Case + TCVSC

+ TBVOOS (all 5 valves) + RPTOOS + 1.244 1.244 1.178 1.164 1.077 1.069 1.000 PROOS with TCVIS Page 12 of 22

COLR LaSalle 1 Rev 18 Table 4-4 DLO Flow Dependent MCPR Limits (MCPRF)

GNF2 Fuel (Reference 7)

Flow MCPRF

(%Rated) Limit 0.0 1.88 30.0 1.70 105.0 1.24*

  • This value is lower than the initial MCPR analyzed in the LOCA analysis. However, because PANACEA calculates the off rated MCPR by taking the maximum of the MCPRp, MCPRf, and OLMCPR, the off rated MCPR is inherently higher than analyzed in the LOCA analysis and the LOCA analysis remains applicable at all conditions.

Table 4-5 SLO Flow Dependent MCPR Limits (MCPRF)

GNF2 Fuel (Reference 7)

Flow MCPRF

(%Rated) 0.0 1.92 30.0 1.74 105.0 1.28 Table 4-6 Cycle Specific SLMCPR (MCPR99.9%)

(Reference 7)

Flow MCPR99.9'1o DLO 1.10 SLO 1.13 Page 13 of 22

COLR LaSalle 1 Rev 18

5. LHGR Technical Specification Sections 3.2.3 and 3.4.1 The LHGR limit is the product of the exposure dependent LHGR limit from Table 5-1 and the minimum of the power dependent LHGR Factor, LHGRFACp, or the flow dependent LHGR Factor, LHGRFACF.

as applicable. The LHGRFACp multiplier is determined from Table 5-2. The LHGRFACF multiplier is determined from Table 5-3 or Table 5-4. The SLO multipliers in Table 5-3 and Table 5-4 have been limited to a maximum value of 0.78, the SLO LHGR multiplier for GNF2 fuel.

Table 5-1 LHGR Limit GNF2 Fuel (References 5 and 8)

Peak Pellet Exposure I U02 LHGR Limit See Table 8-1 of Reference 8 Peak Pellet I Gadolinia LHGR Exposure Limit See Table 8-2 of Reference 8 Page 14 of22

COLR LaSalle 1 Rev 18 Table 5-2 Power Dependent LHGR Multipliers (LHGRFACP)

GNF2 Fuel DLO and SLO (Reference 7)

Core Thermal Power (% rated)

Application Group 0 25 45 60 85 100 LHGRFACp Multiplier Base Case 0.608 0.608 0.713 0.791 0.922 1.000 Base Case + TCVSC

+ RPTOOS + 0.608 0.608 0.703 0.761 0.831 1.000 PROOS Base Case + TCVSC

+ TBVOOS (all 5 0.608 0.608 0.713 0.791 0.922 1.000 valves)

Base Case + TCVSC

+ TBVOOS (all 5 0.608 0.608 0.703 0.761 0.822 1.000 valves) + RPTOOS +

PROOS Base Case with 0.608 0.608 0.713 0.791 0.922 1.000 TCVIS Base Case + TCVSC

+ TBVOOS (all 5 valves)+ RPTOOS + 0.608 0.608 0.703 0.761 0.822 1.000 PROOS with TCVIS Page 15 of 22

COLR LaSalle 1 Rev 18 Table 5-3 Flow-Dependent LHGR Multipliers (LHGRFACF}

GNF2 Fuel BOC to EOC, Pressurization (Application Groups with 1 TCV/TSV Closed or OOS}

(Reference 7)

Flow DLO LHGRFACF SLO LHGRFACF

(%Rated}

0.0 0.11 0.11 30.0 0.41 0.41 67.0 0.78 0.78 89.0 1.00 0.78 105.0 1.00 0.78 Table 5-4 Flow-Dependent LHGR Multipliers (LHGRFACF}

GNF2 Fuel BOC to EOC, No Pressurization (Application Groups with TCV/TSV In-Service}

(Reference 7)

Flow DLO LHGRFACF SLO LHGRFACF

(%Rated}

0.0 0.25 0.25 30.0 0.55 0.55 53.0 0.78 0.78 75.0 1.00 0.78 105.0 1.00 0.78 Page 16 of 22

COLR LaSalle 1 Rev 18

6. Rod Block Monitor Technical Specification Sections 3.3.2.1 and 3.4.1 The Rod Block Monitor Upscale Instrumentation Setpoints are determined from the relationships shown below:

Table 6-1 Rod Block Monitor Setpoints (Reference 3)

Rod Block Monitor Upscale Trip Function Allowable Value Two Recirculation Loop o.66 wd + 54.0%

Operation Single Recirculation Loop o.66 wd + 48. 7%

Operation WcJ - percent of recirculation loop drive flow required to produce a rated core flow of 108.5 Mlbm/hr.

The setpoint may be lower/higher and will still comply with the RWE analysis because RWE is analyzed unblocked (Reference 7). The allowable value is clamped with a maximum value not to exceed the allowable value for a recirculation loop drive flow (Wd) of 100%.

Page 17 of 22

COLR LaSalle 1 Rev 18

7. Traversing In-Core Probe System (References 4 and 12) 7.1. Description When the traversing in-core probe (TIP) system (for the required measurement locations) is used for recalibration of the LPRM detectors and monitoring thermal limits, the TIP system shall be operable with the following:
1. movable detectors, drives, and readout equipment to map the core in the required measurement locations, and
2. indexing equipment to allow all required detectors to be calibrated in a common location.

The following applies for use with 3DM :

At any time, including BOC, the total number of failed and/or bypassed LPRMs does not exceed 25%. In addition, no more than 14 TIP channels can be OOS (failed or rejected) (Reference 4).

Otherwise, with the TIP system inoperable, suspend use of the system for the above applicable calibration functions.

7.2. Bases The operability of the TIP system with the above specified minimum complement of equipment ensures that the measurements obtained from use of this equipment accurately represent the spatial neutron flux distribution of the reactor core. The normalization of the required detectors is performed internal to the core monitoring software system.

Page 18 of 22

COLR LaSalle 1 Rev 18

8. Stability Protection Setpoints Technical Specification Section 3.3.1.3 Table 8-1 OPRM PBDA Trip Setpoints (Reference 7)

Corresponding Maximum PBDA Trip Amplitude Setpoint (Sp)

Confirmation Count Setpoint (Np) 1.15 16 The PBDA is the only OPRM setting credited in the safety analysis as documented in the licensing basis for the OPRM system.

The OPRM PBDA trip settings are applicable when the OPRM system is declared operable, and the associated Technical Specifications are implemented.

Page 19 of 22

COLR LaSalle 1 Rev 18

9. Modes of Operation The allowed modes of operation with combinations of equipment out-of-service are as described below (Reference 7).

Table 9-1 Allowed Modes of Operation and EOOS Combinations (Reference 7)

Equipment Out of Service Options <1> <2><3><4>cs> cs> Short Names Base Case BASE_DLO_ OPTB(A)

Base Case + SLO BASE_SLO_ OPTB(A)

Base Case + TCVSC + RPTOOS + PROOS EOOS 1_DLO _ OPTB(A)

Base Case + TCVSC + RPTOOS + PROOS + SLO EOOS1_SLO_OPTB(A)

Base Case+ TCVSC + TBVOOS (all 5 valves) EOOS2_DLO _ OPTB(A)

Base Case + TCVSC + TBVOOS (all 5 valves) + SLO EOOS2_SLO_ OPTB(A)

Base Case + TCVSC + TBVOOS (all 5 valves) + RPTOOS +

EOOS3_DLO_ OPTB(A)

PROOS Base Case + TCVSC + TBVOOS (all 5 valves) + RPTOOS +

EOOS3_SLO_OPTB(A)

PROOS + SLO Base Case with TCVIS BASE_TCVIS_DLO_ OPTB(A)

Base Case + SLO with TCVIS BASE_TCVIS_SLO_ OPTB(A)

Base Case+ TCVSC + TBVOOS (all 5 valves)+ RPTOOS +

EOOS3_TCVIS_DLO _ OPTB(A)

PROOS with TCVIS Base Case+ TCVSC + TBVOOS (all 5 valves)+ RPTOOS +

EOOS3_TCVIS_SLO_ OPTB(A)

PROOS + SLO with TCVIS (1) Base case includes 1 SRVOOS + 1 TCV/TSV OOS + FWHOOS/FFWTR + 1 MSIVOOS + 2 TBVOOS + PLUOOS. The one TCV and/or TSV OOS conditions require power level s 85% of rated. The one MSIVOOS condition is also supported if thermal power is maintained s 75% of rated (Reference 7).

(2) The 2 TBVOOS in the Base Case are not credited for fast opening or opening on pressure control (Reference 6). The assumption is that two TBVs do not open on any signal and thus remain shut for the transients analyzed (i.e. 3 TBVs are credited to open in pressure control) (Reference 9).

(3) For Application Conditions involving 5 TBVOOS, the 5 TBVs are NOT credited for fast opening and 3 TBVs will not open on pressure control (Reference 6). The #5 TBV is not available for pressure relief and thus cannot be used as one of the credited valves to open in pressure control.

(4) The+ sign that is used in the Equipment Out of Service Option I Application Group descriptions designates an "and/or" (Reference 6).

(5) All EOOS Options are applicable to the entire range of licensed flow and feedwater temperature (MELLLA, ICF, FFWTR.

and coastdown) unless otherwise specified (Reference 7). SLO is not applicable to MELLLA or ICF.

(6) All EOOS options in Table 9-1 can be used with Option A or B MCPR limits (Reference 7).

Page 20of22

COLR LaSalle 1 Rev 18

10. Methodology The analytical methods used to determine the core operating limits shall be those previously reviewed and approved by the NRG, specifically those described in the following documents:
1. GNF Report NEDE-24011 -P-A-29 (Revision 29), "General Electric Standard Application for Reactor Fuel (GESTAR 11)," October 2019 and the U.S. Supplement NEDE-24011-P-A-29-US, October 2019.

Page 21 of22

COLR LaSalle 1 Rev 18

11. References
1. Exelon Generation Company, LLC Docket No. 50-373 LaSalle County Station, Unit 1, Facility Operating License No. NPF-11.
2. Deleted.
3. Exelon Nuclear Fuels Letter NFM:MW:01-0106, "LaSalle Unit 1 and Unit 2 Rod Block Monitor COLR Setpoint Change," April 3, 2001 .
4. GE Nuclear Energy Report NEDC-32694P-A, Revision 0, "Power Distribution Uncertainties for Safety Limit MCPR Evaluations," August 1999.
5. GNF Report 004N8325, Revision 0, "Fuel Bundle Information Report for LaSalle Unit 1 Reload 18 Cycle 19," December 2019.
6. Exelon Transmittal NF194844, Revision 0, "LaSalle Unit 1 Cycle 19 FRED Form," July 26, 2019.
7. GNF Report 004N8324, Revision 0, "Supplemental Reload Licensing Report for LaSalle Unit 1 Reload 18 Cycle 19," December 2019.
8. GNF Document No. NEDC-33270P Revision 9, "GNF2 Advantage Generic Compliance with NEDE-24011-P-A (GESTAR 11)", December 2017.
9. Exelon Transmittal ES1900014, Revision 0, "LaSalle Unit 1 Cycle 19 Completed OPL-3 Form,"

October 2, 2019.

10. GNF Letter ORF A12-00038-3, Vol. 4, "Scram Times versus Notch Position," May 22, 1992.
11. Deleted.
12. NRC Letter, "Issuance of Amendments (TAC Nos. M95156 and M95157)," October 29, 1996.

Page 22 of22

COLR LaSalle 2 Revision 17 Core Operating Limits Report For LaSalle Unit 2 Cycle 18 Prepared By:

~b--

e\iiilSmith, NF CM Date: 1/31/2020 Reviewed By: /.~ Date: 31-JAN-20 Tae Wook Ahn, NF CM Reviewed By: ~b-- Date:

2-3-2020 John Simmons, ESA Reviewed By: ~ Date: 2/12/2020 Approved By: Date: 13F£824 SOR By: Date: 211412020

~a,RE LaSalle Unit 2 Cycle 18 Page 1of21

COLR LaSalle 2 Revision 17 Table of Contents Page Revision History .................................... .................. ................................................................ 3 List of Tables ... ..... ................... .................................................... .... ................ .. ...................... 4

1. Terms and Definitions ....................... ... ... ............................. .. ... ....... .......... ......... ................ 5
2. General Information ........ ................ ..................................................................................... 6
3. MAPLHGR .. .. ...................................................................................................................... 7
4. MCPR ..... ....... ....... .... ........... ...... .. ....... ... .. ......... ..... .......... .......... ...... ........... ...... .......... ......... 8 4.1. MCPR Limits ......................... ................ ........................................................................................... ...... a 4.1.1. Power-Dependent MCPR .... ......... .................................................. .. ............ ............ .. ................ a 4.1.2. Flow-Dependent MCPR. ........................ .. ..... .............. .. ... .. ............... ....... ......................... ........... a 4.1.3. Safetly Limit MCPR .. ..................... ................ .. .. .... .. ................... ......................... ......................... 8 4.2. Scram Time ................... .............................................................................. ................................... ....... .. 9 4.3. Recirculation Flow Control Valve Settings ....................... ............ ... .. ................ .............. .............. 9
5. LHGR ................................................................................................................................ 13
6. Rod Block Monitor ........... .. ............... ................................................................................. 16
7. Traversing In-Core Probe System ....................................... ........... ........... .. ..................... 17 7.1. Description ...................................... ........ ....... ............... .. .......... ........... ......... .... ........ ........................... . 17 7.2. Bases ..... ....................................................................... ................................................. ........................ 17
8. Stability Protection Setpoints ............... ................................. .... ......................... ............. ... 18
9. Modes of Operation ......... ................... ................................. .................. .. .......................... 19
10. Methodology .................. .................. .. ............................................................................ .. 20 11 . References .............................................................. ............... ................... ............ ....... ... 21 LaSalle Unit 2 Cycle 18 Page 2 of 21

COLR LaSalle 2 Revision 17 Revision History Record of COLR LaSalle 2 Cycle 18 Revisions Revision Description 17 Revised to add MCPR99.9% as part of TSTF 564 implementation, added two TIPOOS report, moved reference section to the back of the report, and made other language/administrative changes throughout the report including clarification changes to the modes of operation footnotes.

16 Initial issuance for L2C18.

LaSalle Unit 2 Cycle 18 Page 3 of21

COLR LaSalle 2 Revision 17 List of Tables Table 2-1 Cycle Exposure Range Definitions ......... ... .. ...... .... ..... ............ ... ............................ ...... ...... ... .... ....... 6 Table 3-1 MAPLHGR for GNF2 and GNF3 Fuel .. .. .... .... .... .. ........ ........ .. ...... .. .... .... .. .. .. ........ .. .. .... .. .......... .. .... . 7 Table 3-2 MAPLHGR SLO Multiplier for GNF2 and GNF3 Fuel ........................ .. .............. ................ .. .. ......... 7 Table 4-1 Scram Times Required for Option A and Option B Application at Notch Position 39 .. .. ...... .. .. .. .... . 9 Table 4-2 Operating Limit Minimum Critical Power Ratio (OLMCPR) for GNF2 and GNF3 Fuel ..... ...... ...... 10 Table 4-3 Power-Dependent MCPR Multipliers (KP) for GNF2 and GNF3 Fuel, DLO and SLO, BOC to EOC, Option A and Option B ...... ... .......................... ................... ........ ..... 11 Table 4-4 DLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 and GNF3 Fuel, BOC to EOC, All Application Groups, Option A and Option B .. .......... ........... ...... .... .. ....... .. .... .. .. .. 12 Table4-5 SLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 and GNF3 Fuel, BOC to EOC, All Application Groups, Option A and Option B ............. .... .......... .................. .. .. ..... 12 Table4-6 Cycle Specific SLMCPR (MCPR99.9%) .. .. ...... ...... ........ ....... .... ............ ......... ............... ...... .. .. ...... .... 12 Table 5-1 LHGR Limit for GNF2 and GNF3 Fuel ..... .............. ...... ....... ...... .. .... .. ... .... .......... ........... ..... .. ... .. .. .. 13 Table 5-2 Power-Dependent LHGR Multipliers (LHGRFACP) for GNF2 and GNF3 Fuel, DLO and SLO ... .. ..... .... ... .. ........... ... ....... ......... .... ..... .... ..... ..... ... .. .. ... .. .. .. .. ... .. ..... .... ... ..... ... .. ........ ... 14 Table 5-3 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 and GNF3 Fuel, BOC to EOC, Pressurization (Application Groups with 1 TCV/TSV Closed or OOS), ........ ... ...... 15 Table 5-4 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 and GNF3 Fuel, BOC to EOC, No Pressurization (Application Groups with TCV/TSV In-Service), ... ........ ..... ...... 15 Table 6-1 Rod Block Monitor Setpoints .... ......... .... .. ... ........ .. .. .. ........... ..... ............. .... ...... ....... ............ .. .. .. ..... 16 Table 8-1 OPRM PBDA Trip Setpoints .................. ........ .. .. ........... ........ ............ ... ........... .............. .... .... ...... ... 18 Table 9-1 Allowed Modes of Operation and EOOS Combinations .... .... .. .. ............. ............ ...... ..................... 19 LaSalle Unit 2 Cycle 18 Page 4 of 21

COLR LaSalle 2 Revision 17

1. Terms and Definitions ARO All Rods Out ARTS Average Power Range Monitor, Rod Block Monitor and Technical Specification Improvement Program BOC Beginning of cycle CROM Control rod drive mechanism DLO Dual loop operation ELL LA Extended load line limit analysis EOC End of cycle EOOS Equipment out of service EOR End of rated - Cycle exposure corresponding to all rods out, 100% power/100% flow, and normal feedwater temperature.

FFWfR Final feedwater temperature reduction FWHOOS Feedwater heater out of service GNF Global Nuclear Fuels - Americas ICF Increased core flow KP Power-dependent MCPR Multiplier L2C18 LaSalle Unit 2 Cycle 18 LHGR Linear heat generation rate LHGRFACF Flow-dependent LHGR multiplier LHGRFACP Power-dependent LHGR multiplier LPRM Local power range monitor MAPLHGR Maximum average planar linear heat generation rate MCFL Maximum combined flow limiter MCPR Minimum critical power ratio MCPRee.e% Limiting MCPR value such that 99.9% of the fuel in the core is not susceptible to boiling transition.

MCPRF Flow-dependent MCPR MELLLA Maximum extended load line limit analysis MOC Middle of Cycle Point for Licensing Purposes MSIVOOS Main steam isolation valve out of service OLMCPR Operating limit minimum critical power ratio oos Out of service OPRM Oscillation power range monitor PBDA Period based detection algorithm PLUOOS Power load unbalance out of service PROOS Pressure regulator out of service RPTOOS Recirculation pump trip out of service RWE Rod withdrawal error SLMCPR Safety limit minimum critical power ratio SLO Single loop operation SRVOOS Safety/relief valve out of service TBV Turbine bypass valve TBVOOS Turbine bypass valve out of service TCV Turbine control valve TCVIS All Turbine Control Valves/Turbine Stop Valves in-service TCVSC Turbine control valve slow closure TIP Traversing in-core probe TIPOOS Traversing in-core probe out of service TSV Turbine stop valve 3DM 30 Monicore LaSalle Unit 2 Cycle 18 Page 5 of 21

COLR LaSalle 2 Revision 17

2. General Information The data provided in this report is valid for (Reference 7):
  • Maximum Extended Load Line Limit down to 82.8% of rate core flow during full power operation (rated core flow is 108.5 Mlb/hr)
  • ICF to 105% of rated core flow
  • Coastdown to 40% rated power (rated core thermal power is 3546 MWth) o Operation at a power level above that which can be achieved with ARO, ICF, FFWTR, and steady-state equilibrium Xenon concentrations is not supported.
  • Maximum reduction of 100°F of the feedwater temperature for FWHOOS/FFWTR.

Throughout this report, power and flow dependent limits are listed for various power and flow levels. Linear interpolation is to be used to find intermediate values.

Table 2-1 defines the three exposure ranges used in the COLR. The term (EOR18 -4707 MWd/ST) means the Cycle 18 EOR exposure minus 4707 MWd/ST of exposure. The value of the EOR exposure is based on actual plant operation and is thus determined from projections to this condition made near, but before, the time when the EOR18 - 4707 MWd/ST exposure will be reached. For cycle exposure dependent limits at the exact MOC exposure, the more limiting of the BOC to MOC and the MOC to EOC limits should be used. This can be achieved by applying the MOC to EOC limits to the MOC point as all cycle exposure dependent limits in the MOC to EOC limit sets are the same as, or more limiting than, those in the BOC to MOC limit sets.

Table 2-1 Cycle Exposure Range Definitions (Reference 7)

Nomenclature Cycle Exposure Range BOC to MOC BOC18 to (EOR18 - 4707 MWd/ST)

MOC to EOC (EOR 18 - 4 707 MWd/ST) to EOC 18 BOC to EOC BOC18 to EOC18 LaSalle Unit 2 Cycle 18 Page 6 of 21

COLR LaSalle 2 Revision 17

3. MAPLHGR Technical Specification Sections 3.2.1 and 3.4.1 MAPLHGR values as a function of average planar exposure are given in Table 3-1. During SLO, these limits are multiplied by the SLO multiplier listed in Table 3-2. Tables 3-1 and 3-2 provide coverage for all modes of operation.

Table 3-1 MAPLHGR for GNF2 and GNF3 Fuel (Reference 7)

Avg. Planar MAPLHGR Exposure (kW/FT)

(GWd/ST) 0.00 13.78 17.15 13.78 60.78 6.87 63.50 5.50 Table 3-2 MAPLHGR SLO Multiplier for GNF2 and GNF3 Fuel (Reference 7)

SLO Fuel Type MAPLHGR Multiclier GNF2 0.78 GNF3 0.78 LaSalle Unit 2 Cycle 18 Page 7 of21

COLR LaSalle 2 Revision 17

4. MCPR Technical Specification Sections 3.2.2. 3.3.4.1 . 3.4.1. and 3.7.7 4.1. MCPR Limits The rated OLMCPRs given in Table 4-2 are the maximum values obtained from analysis of the pressurization events, non-pressurization events, and the Option Ill stability evaluation. MCPR values are determined by the cycle-specific fuel reload analyses in Reference 7. Table 4-2 is used in conjunction with the ARTS-based power (Kp) and flow (MCPRF) dependencies presented in Tables 4-3, 4-4, and 4-5 below. The OLMCPR is determined for a given power and flow condition by evaluating the power and flow dependent MCPR values and selecting the greater of the two.

4.1.1. Power-Dependent MCPR The power-dependent MCPR multiplier, KP, is determined from Table 4-3, and is dependent only on the power level and the Application Group (EOOS). The product of the rated OLMCPR and the proper KP provides the power-dependent OLMCPR.

4.1.2. Flow-Dependent MCPR Tables 4-4 through 4-5 give the MCPRF limit as a function of the core flow, based on the applicable plant conditions. The MCPRF limit determined from these tables is the flow-dependent OLMCPR.

4.1.3. Safety Limit MCPR The cycle-specific SLMCPR, known as MCPR99.9%, can be found in Table 4-6 for dual loop and single loop operating conditions. The values in Table 4-6 were used to calculate the rated and off-rated MCPR limits. For LaSalle Unit 2 Cycle 18 only, the cycle specific SLMCPRs used are more conservative than the vendor calculated cycle specific SLMCPRs.

LaSalle Unit 2 Cycle 18 Page 8 of21

COLR LaSalle 2 Revision 17 4.2. Scram Time Option A and Option B MCPR analyses and results are dependent upon core average control rod blade scram speed insertion times.

The Option A scram time is the Improved Technical Specification scram speed based insertion time. The core average scram speed insertion time for 20% insertion must be less than or equal to the Technical Specification scram speed insertion time to utilize the Option A MCPR limits. Reload analyses performed by GNF for Cycle 18 Option A MCPR limits utilized a 20% core average insertion time of 0.900 seconds (Reference 9).

To utilize the MCPR limits for the Option B scram speed insertion times, the core average scram speed insertion time for 20% insertion must be less than or equal to 0.694 seconds (Reference 9) (0.672 seconds at notch position 39, Reference 10). See Table 4-1 for a summary of scram time requirements related to the use of Option A and Option B MCPR limits.

If the core average scram insertion time does not meet the Option B criteria, but is within the Option A criteria, the appropriate steady state MCPR value may be determined from a linear interpolation between the Option A and B limits with standard mathematical rounding to two decimal places. When performing the linear interpolation to determine MCPR limits, ensure that the time used for Option A is 0.900 seconds (0.875 seconds to notch position 39, Reference 10).

Table 4-1 Scram Times Required for Option A and Option B Application at Notch Position 39 (References 9 and 10)

Notch Scram Time Required for Option A Scram Time Required for Option B Position* Application Application 39 s 0.875 sec. s 0.672 sec.

  • The insertion time to a notch pos1t1on 1s conservatively calculated using the CRD reed switch drop-out time per Reference 10.

4.3. Recirculation Flow Control Valve Settings Cycle 18 was analyzed with a maximum core flow runout of 105%; therefore, the recirculation pump flow control valves must be set to maintain core flow less than 105% (113.925 Mlbm/hr) for all runout events.

(Reference 7)

LaSalle Unit 2 Cycle 18 Page 9 of 21

COLR LaSalle 2 Revision 17 Table 4-2 Operating Limit Minimum Critical Power Ratio (OLMCPR) for GNF2 and GNF3 Fuel (References 7)

Application Group DLO/SLO Exposure Range Option A Option B BOC-MOC 1.39 1.35 DLO MOC-EOC 1.42 1.38 Base Case BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.44 1.36 DLO MOC-EOC 1.48 1.40 Base Case + TCVSC

+ RPTOOS + PROOS BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.41 1.37 DLO MOC-EOC 1.44 1.40 Base Case + TCVSC +

TBVOOS (all 5 valves)

BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.47 1.39 DLO Base Case + TCVSC + MOC-EOC 1.50 1.42 TBVOOS (all 5 valves)

+ RPTOOS + PROOS BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.39 1.35 DLO MOC-EOC 1.42 1.38 Base Case with TCVIS BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 BOC-MOC 1.47 1.39 Base Case + TCVSC + DLO TBVOOS (all 5 valves) MOC-EOC 1.50 1.42

+ RPTOOS + PROOS with TCVIS BOC-MOC 1.59 1.59 SLO MOC-EOC 1.59 1.59 LaSalle Unit 2 Cycle 18 Page 10 of21

COLR LaSalle 2 Revision 17 Table 4-3 Power-Dependent MCPR Multipliers (KP) for GNF2 and GNF3 Fuel, DLO and SLO, BOC to EOC, Option A and Option B (Reference 7)

KP, MCPR Limit Multiplier (as a function of% rated power)

Application Group 0% p 25% p 45%P 60% p S85% P >85%P 100% p Base Case 1.156 1.156 1.156 1.156 1.045 1.045 1.000 Base Case + TCVSC +

1.244 1.244 1.178 1.164 1.077 1.045 1.000 RPTOOS + PROOS Base Case + TCVSC +

1.244 1.244 1.178 1.164 1.077 1.045 1.000 TBVOOS (all 5 valves)

Base Case + TCVSC +

TBVOOS (all 5 valves) 1.244 1.244 1.178 1.164 1.077 1.069 1.000

+ RPTOOS + PROOS Base Case with TCVIS 1.156 1.156 1.156 1.156 1.045 1.045 1.000 Base Case + TCVSC +

TBVOOS (all 5 valves) 1.244 1.244 1.178 1.164 1.077 1.069 1.000

+ RPTOOS + PROOS withTCVIS LaSalle Unit 2 Cycle 18 Page 11of21

COLR LaSalle 2 Revision 17 Table 4-4 DLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 and GNF3 Fuel, BOC to EOC, All Application Groups, Option A and Option B (References 7)

Flow MCPRF

(%Rated) 0.0 1.88 30.0 1.70 105.0 1.24*

  • This value is lower than the initial MCPR analyzed in the LOCA analysis. However, because PANACEA calculates the offrated MCPR by taking the maximum of the MCPRp, MCPRf, and OLMCPR, the offrated MCPR is inherently higher than analyzed in the LOCA analysis and the LOCA analysis remains applicable at all conditions.

Table 4-5 SLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 and GNF3 Fuel, BOC to EOC, All Application Groups, Option A and Option B (References 7)

Flow MCPRF

(%Rated) 0.0 1.92 30.0 1.74 105.0 1.28 Table 4-6 Cycle Specific SLMCPR (MCPRss.s3)

(Reference 7)

Flow MCPR99.9%

DLO 1.12 SLO 1.15 LaSalle Unit 2 Cycle 18 Page 12 of 21

COLR LaSalle 2 Revision 17

5. LHGR Technical Specification Sections 3.2.3 and 3.4.1 The LHGR limit is the product of the exposure dependent LHGR limit from Table 5-1 and the minimum of the power dependent LHGR Factor, LHGRFACP, or the flow dependent LHGR Factor, LHGRFACF. as applicable. The LHGRFACP multiplier is determined from Table 5-2. The LHGRFACF multiplier is determined from Table 5-3 or Table 5-4. The SLO multipliers in Table 5-3 and Table 5-4 have been limited to a maximum value of 0.78, the SLO LHGR multiplier for both GNF2 and GNF3 fuel.

Table 5-1 LHGR Limit for GNF2 and GNF3 Fuel (Reference 5 and 8)

Peak Pellet Ex osure U02 LHGR Limit See Table B-1 of Reference 8 Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit See Table B-2 of Reference 8 LaSalle Unit 2 Cycle 18 Page 13 of 21

COLR LaSalle 2 Revision 17 Table 5-2 Power-Dependent LHGR Multipliers (LHGRFACP) for GNF2 and GNF3 Fuel, DLO and SLO (Reference 7)

LHGRFACP (as a function of% rated power)

Application Group 0%P 25% p 45% p 60% p 85% p 100% p Base Case 0.608 0.608 0.713 0.791 0.922 1.000 Base Case + TCVSC +

0.608 0.608 0.703 0.761 0.831 1.000 RPTOOS + PROOS Base Case + TCVSC +

0.608 0.608 0.713 0.791 0.922 1.000 TBVOOS (all 5 valves)

Base Case + TCVSC +

TBVOOS (all 5 valves) 0.608 0.608 0.703 0.761 0.822 1.000

+ RPTOOS + PROOS Base Case with TCVIS 0.608 0.608 0.713 0.791 0.922 1.000 Base Case + TCVSC +

TBVOOS (all 5 valves) 0.608 0.608 0.703 0.761 0.822 1.000

+ RPTOOS + PROOS with TCVIS LaSalle Unit 2 Cycle 18 Page 14 of 21

COLR LaSalle 2 Revision 17 Table 5-3 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 and GNF3 Fuel, BOC to EOC, Pressurization (Application Groups with 1 TCV/TSV Closed or OOS),

(Reference 7)

Flow DLO LHGRFACF SLO LHGRFACF

(%Rated) 0.0 0.11 0.11 30.0 0.41 0.41 67.0 0.78 0.78 89.0 1.00 0.78 105.0 1.00 0.78 Table 5-4 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 and GNF3 Fuel, BOC to EOC, No Pressurization (Application Groups with TCV/TSV In-Service)

(Reference 7)

Flow DLO LHGRFACF SLO LHGRFACF

(% Rated) 0.0 0.25 0.25 30.0 0.55 0.55 53.0 0.78 0.78 75.0 1.00 0.78 105.0 1.00 0.78 LaSalle Unit 2 Cycle 18 Page 15 of 21

COLR LaSalle 2 Revision 17

6. Rod Block Monitor Technical Specification Sections 3.3.2.1 and 3.4.1 The Rod Block Monitor Upscale Instrumentation Setpoints are determined from the relationships shown below (Reference 3):

Table 6-1 Rod Block Monitor Setpoints Rod Block Monitor Upscale Trip Function Allowable Value Two Recirculation Loop 0.66 Wd + 54.0%

Operation Single Recirculation Loop 0.66 Wd + 48.7%

Operation Wd - percent of recirculation loop drive flow required to produce a rated core flow of 108.5 Mlbm/hr.

The setpoint may be lower/higher and will still comply with the rod withdrawal error (RWE) analysis because RWE is analyzed unblocked (Reference 7). The allowable value is clamped with a maximum value not to exceed the allowable value for a recirculation loop drive flow (Wd) of 100%.

LaSalle Unit 2 Cycle 18 Page 16 of 21

COLR LaSalle 2 Revision 17

7. Traversing In-Core Probe System (References 2, 4, and 12) 7 .1. Description When the traversing in-core probe (TIP) system (for the required measurement locations) is used for recalibration of the LPRM detectors and monitoring thermal limits, the TIP system shall be operable with the following:
1. movable detectors, drives and readout equipment to map the core in the required measurement locations, and
2. indexing equipment to allow all required detectors to be calibrated in a common location.

The following applies for use with 3DM:

At any time, including BOC, the total number of failed and/or bypassed LPRMs does not exceed 25%. In addition, no more than 18 TIP channels can be OOS (failed or rejected).

Otherwise, with the TIP system inoperable, suspend use of the system for the above applicable calibration functions.

7.2. Bases The operability of the TIP system with the above specified minimum complement of equipment ensures that the measurements obtained from use of this equipment accurately represent the spatial neutron flux distribution of the reactor core. The normalization of the required detectors is performed internal to the core monitoring software system.

LaSalle Unit 2 Cycle 18 Page 17 of 21

COLR LaSalle 2 Revision 17

8. Stability Protection Setpoints Technical Specification Section 3.3.1.3 Table 8-1 OPRM PBDA Trip Setpoints (Reference 7)

Corresponding Maximum PBDA Trip Amplitude Setpoint (Sp)

Confirmation Count Setpoint (Np) 1.15 16 The PBDA is the only OPRM setting credited in the safety analysis as documented in the licensing basis for the OPRM system.

The OPRM PBDA trip settings are applicable when the OPRM system is declared operable, and the associated Technical Specifications are implemented.

LaSalle Unit 2 Cycle 18 Page 18 of 21

COLR LaSalle 2 Revision 17

9. Modes of Operation The allowed modes of operation with combinations of equipment out-of-service are as described below (Reference 7).

Table 9-1 Allowed Modes of Operation and EOOS Combinations (Reference 7)

Equipment Out of Service Options <1><2> <3><4><5> Short Names BASE_DLO_ OPTB(A)

Base Case Base Case + SLO BASE_SLO_ OPTB(A)

EOOS1_DLO_OPTB(A)

Base Case + TCVSC + RPTOOS + PROOS EOOS1_SLO_OPTB(A)

Base Case + TCVSC + RPTOOS + PROOS + SLO EOOS2_DLO_ OPTB(A)

Base Case+ TCVSC + TBVOOS (all S valves)

EOOS2_SLO_ OPTB(A)

Base Case+ TCVSC + TBVOOS (all S valves)+ SLO Base Case+ TCVSC + TBVOOS (all S valves) + RPTOOS + PROOS EOOS3_DLO_ OPTB(A)

EOOS3_SLO_ OPTB(A)

Base Case+ TCVSC + TBVOOS (all 5 valves)+ RPTOOS + PROOS + SLO BASE_TCVIS_DLO_ OPTB(A)

Base Case with TCVIS BASE_TCVIS_SLO_OPTB(A)

Base Case + SLO with TCVIS Base Case + TCVSC + TBVOOS (all S valves) + RPTOOS + PROOS with EOOS3_TCVIS_DLO_OPTB(A)

TCVIS Base Case+ TCVSC + TBVOOS (all 5 valves) + RPTOOS + PROOS + SLO EOOS3_TCVIS_SLO_ OPTB(A) withTCVIS (1) Base case includes 1 SRVOOS + 1 TCVITSV OOS + FWHOOS/FFWTR + 1 MSIVOOS + 2 TBVOOS + PLUOOS. The one TCV and/or TSV OOS conditions require power level s 85% of rated. The one MSIVOOS condition is also supported if thermal power is maintained s 75% of the rated (Reference 7).

(2) TBVOOS (all 5 valves) is the turbine bypass system out of service which means that 5 TBVs are not credited for fast opening and 3 TBVs are n.21 credited to open in pressure control. For the 2 TBVOOS condition that is a part of the base case, the assumption is that both TBVs do not open on any signal and thus remain shut for the transients analyzed (i.e. 3 TBVs are credited to open in pressure control). (Reference 9). The #5 TBV is not available for pressure relief and thus cannot be used as one of the credited valves to open in pressure control.

(3) The+ sign that is used in the Equipment Out of Service Option I Application Group descriptions designates an "and/or".

(4) All EOOS Options are applicable to MELLLA, ICF, FFWTR, and Coastdown realms of operation (Reference 7), except SLO is not applicable to MELLLA or ICF.

(5) All EOOS options in Table 9-1 can be used in Option A or B. (Reference 7).

LaSalle Unit 2 Cycle 18 Page 19 of21

COLR LaSalle 2 Revision 17

10. Methodology The analytical methods used to determine the core operating limits shall be those previously reviewed and approved by the NRC, specifically those described in the following documents:
1. GNF Report NEDE-24011-P-A-26 (Revision 26), "General Electric Standard Application for Reactor Fuel,"

January 2018 and the U.S. Supplement NEDE-24011-P-A-26-US, January 2018.

LaSalle Unit 2 Cycle 18 Page 20 of 21

COLR LaSalle 2 Revision 17

11. References
1. Exelon Generation Company, LLC Docket No. 50-374 LaSalle County Station, Unit 2, Facility Operating License No. NPF-18.
2. GNF Report 005N2488, Revision 1, "LaSalle Unit 2 Cycle 18: Technical Evaluation of Two TIP Machines Out-Of-Service on Methods Uncertainties," May 2019.
3. Exelon Nuclear Fuels Letter NFM:MW:01-0106, "LaSalle Unit 1 and Unit 2 Rod Block Monitor COLR Setpoint Change," April 3, 2001 .
4. GE Nuclear Energy Report NEDC-32694P-A, Revision 0, "Power Distribution Uncertainties for Safety Limit MCPR Evaluations," August 1999.
5. GNF Report 004N5197, Revision 0, "Fuel Bundle Information Report for LaSalle Unit 2 Reload 17 Cycle 18,"

December 2018.

6. Deleted.
7. GNF Report 004N5196, Revision 0, "Supplemental Reload Licensing Report for LaSalle Unit 2 Reload 17 Cycle 18," December 2018.
8. GNF Document No. NEDC-33270P Revision 9, "GNF2 Advantage Generic Compliance with NEDE-24011-P-A (GESTAR II), December 2017.
9. Exelon Transmittal ES1800020, Revision 0, "LaSalle Unit 2 Cycle 18 Completed OPL-3 Form," August 7, 2017.
10. GNF Letter ORF A12-00038-3, Vol. 4, "Scram Times versus Notch Position," May 22, 1992.

11 . Deleted.

12. NRC Letter, "Issuance of Amendments (TAC Nos. M95156 and M95157)," October 29, 1996.

LaSalle Unit 2 Cycle 18 Page 21of21

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