RA18-016, Cycle 18 Core Operating Limits Report (COLR)

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Cycle 18 Core Operating Limits Report (COLR)
ML18082A087
Person / Time
Site: LaSalle Constellation icon.png
Issue date: 03/22/2018
From: Trafton W
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RA18-016
Download: ML18082A087 (22)
v • d • e


Text

j LaSalle County Station xelon Generatioh 2601 Nor1h 21'" Road Marseilles, IL 61341 815-415-2000 Telepl1on www.exeloncorp.com RA18-016 10 CFR 50.4 March 22, 2018 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 LaSalle County Station, Unit 1 Renewed Facility Operating License No. NPF-11 NRC Docket No. 50-373

Subject:

Unit 1 Cycle 18 Core Operating Limits Report (COLR)

In accordance with LaSalle County Station (LSCS) Technical Specifications (TS) 5.6.5.d, "CORE OPERATING LIMITS REPORT (COLR)," attached is a copy of Revision 0 of the COLR for Unit 1. This report was revised for LSCS Unit 1, Cycle 18.

There are no regulatory commitments contained within this letter.

Should you have any questions concerning this letter, please contact Mr. Guy V. Ford, Jr.,

Regulatory Assurance Manager, at (815) 415-2800.

Respectfully,

~tftl':-

Site Vice President LaSalle County Station

Attachment:

Core Operating Limits Report for LaSalle Unit 1 Cycle 18, Revision O cc: Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - LaSalle County Station

COLR LaSalle 1 Revision 17 Core Operating L1mits Report For LaSalle Unit 1 Cycle 18 Prepared By: ~~/hM:-~~

Kevin Smit /Kristin McCosk9i,FCM Date: 212s11 a Reviewed By: Date: 2/27/1 B JohnW eler, NF CM Reviewed By:

Chad Bum~ Date: 2/27/2018 Reviewed By: ~~c" Date: 212812018 Jonath~Rolland. RE Approved By: ~~ Date: 01MAR18 SQR By: Date: 3/1 /1a LaSalle Unit 1 Cycle 18 Page 1 of 21

COLR LaSalle 1 Revision 17 Table of Contents Page Revision History ...................................................................................................................................................... 3 List of Tables ........................................................................................................................................................... 4 1 . References .......................................................................................................................................................... 5

2. Terms and Definitions ......................................................................................................................................... 6
3. General Information ............................................................................................................................................ 7
4. Average Planar Linear Heat Generation Rate .................................................................................................... 8
5. Operating Limit Minimum Critical Power Ratio ......................................................................... .......................... 9 5.1. Manual Flow Control MCPR Limits ............................................................................................... 9 5.1.1. Power-Dependent MCPR .............................................................................................................. 9 5.1.2. Flow-Dependent MCPR .................................................................... ............................................ 9 5.2. Scram Time .............................................................................................................................. 10 5.3. Recirculation Flow Control Valve Settings .................................................................................... 10
6. Linear Heat Generation Rate ............................................................................................................................ 14
7. Rod Block Monitor ............................................................................................................................................. 17
8. Traversing In-Core Probe System .................................................................................................................. 18 8.1. Description .............................................................................................................................. 18 8.2. Bases .............................. .......................................................... .... ................. .... ................ ... . 18
9. Stability Protection Setpoints .. ...... ............ ........................................................................................................ 19
10. Modes of Operation ........................................................................................................................................ 20
11. Methodology .................................................................................................................................................... 21 LaSalle Unit 1 Cycle 18 Page 2 of 21

COLR LaSalle 1 Revision 17 Revision History Record of COLR LaSalle 1 Cycle 18 Revisions Revision Description 17 Initial issuance for L 1C18.

LaSalle Unit 1 Cycle 18 Page 3 of21

COLR LaSalle 1 Revision 17 List of Tables Table 3-1 Cycle Exposure Range Definitions ........ ...........................................................................................?

Table 4-1 MAPLHGR for GNF2 Fuel ................................................................................................................8 Table 4-2 MAPLHGR SLO Multiplier for GNF2 Fuel, BOC to EOC .................................................................8 Table 5-1 Scram Times Required for Option A and Option B Application at Notch Position 39 ................... 10 Table 5-2 Operating Limit Minimum Critical Power Ratio (OLMCPR) for GNF2 Fuel ................................... 11 Table 5-3 Power-Dependent MCPR Multipliers (KP) for GNF2 Fuel, DLO and SLO, BOC to EOC, Option A and Option B ................................................................... 12 Table 5-4 DLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 Fuel, BOC to EOC, All Application Groups, Option A and Option B ...................................................... 13 Table 5-5 SLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 Fuel, BOC to EOC, All Application Groups, Option A and Option B ...................................................... 13 Table 6-1 LHGR Limit for GNF2 Fuel ............................................................................................................ 14 Table 6-2 Power-Dependent LHGR Multipliers (LHGRFACP) for GNF2 Fuel, DLO and SLO, BOC to EOC ......................................................................................................... 15 Table 6-3 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, Pressurization (1 TCV/TSV Closed or OOS), All Application Groups .................... 16 Table 6-4 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, No Pressurization (All TCV/TSV In-Service), All Application Groups ..................... 16 Table 7-1 Rod Block Monitor Setpoints ......................................................................................................... 17 Table 9-1 OPRM PBDA Trip Setpoints .......................................................................................................... 19 Table 10-1 Allowed Modes of Operation and EOOS Combinations ................................................................ 20 LaSalle Unit 1 Cycle 18 Page 4 of 21

COLR LaSalle 1 Revision 17

1. References
1. Exelon Generation Company, LLC Docket No. 50-373 LaSalle County Station, Unit 1, Facility Operating License No. NPF-11 .
2. GEH Nuclear Energy Letter MFN 10-355 Enclosure 1, "Response to NRC RAls - NEDC-33173P, Revision 2 and Supplement 2, Parts 1-3", December 17, 2010.
3. Exelon Nuclear Fuels Letter NFM:MW:01-0106, from A. Giancatarino to J. Nugent, "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. Deleted.
6. Deleted.
7. GNF Report 003N8928, Revision 0, "Supplemental Reload Licensing Report for LaSalle Unit 1 Reload 17 Cycle 18," December 2017.
8. GNF Letter MFN 13-029, from B. R. Moore to Document Control Desk, "GNF2 Advantage Generic Compliance with NEDE-24011-P-A (GESTAR II), NEDC-33270P, Revision 5, May 2013," May 24, 2013.

(ADAMS Accession No. ML13148A318)

9. Exelon Transmittal ES1700016, Revision 0, "LaSalle Unit 1 Cycle 18 Final Resolved OPL-3 Parameters,"

August 23, 2017.

10. GE Nuclear Energy Letter ORF A12-00038-3, Vol. 4, from G.A. Watford to Distribution, "Scram Times versus Notch Position," May 22, 1992.

11 . Deleted.

12. NRC Letter from D. M. Skay to I. M. Johnson, "Issuance of Amendments (TAC NOS. M95156 and M95157)," October 29, 1996.

LaSalle Unit 1 Cycle 18 Page 5 of 21

COLR LaSalle 1 Revision 17

2. Terms and Definitions ARTS Average Power Range Monitor, Rod Block Monitor and Technical Specification Improvement Program BOC Beginning of cycle BWR Boiling water reactor COLR Core operating limits report CRD Control rod drive mechanism DLO Dual loop operation EFPH Effective Full Power Hours ELLLA Extended load line limit analysis EOC End of cycle EOOS Equipment out of service EOR18 End of rated operation for Cycle 18 FFWTR Final feedwater temperature reduction FWHOOS Feedwater heater out of service GNF Global Nuclear Fuels - Americas ICF Increased core flow KP Power-dependent MCPR Multiplier L1C18 LaSalle Unit 1 Cycle 18 LHGR Linear heat generation rate LHGRFACF Flow-dependent LHGR multiplier LHGRFACP Power-dependent LHGR multiplier LOCA Loss of coolant accident LPRM Local power range monitor MAPLHGR Maximum average planar linear heat generation rate MCFL Maximum combined flow limiter MCPR Minimum critical power ratio 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 SLM CPR 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 1 Cycle 18 Page 6 of 21

COLR LaSalle 1 Revision 17

3. General Information Power and flow dependent limits are listed for various power and flow levels. Linear interpolation is to be used to find intermediate values.

Rated core flow is 108.5 Mlbm/hr. Operation up to 105% rated flow is licensed for this cycle. Licensed rated thermal power is 3546 MWth.

For thermal limit monitoring above 100% rated power or 100% rated core flow, the 100% rated power and the 100% core flow values, respectively, can be used unless otherwise indicated in the applicable table.

Table 3-1 defines the three exposure ranges used in the COLR. The end of rated (EOR) exposure is defined as the cycle exposure corresponding to all rods out, 100% power/100% flow, and normal feedwater temperature.

The term (EOR - 2912 MWd/ST) means the EOR exposure minus 2912 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 - 2912 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 EOG limits should be used. This can be achieved by applying the MOC to EOG limits to the MOC point as all cycle exposure dependent limits in the MOC to EOG limit sets are the same as, or more limiting than, those in the BOC to MOC limit sets.

Table 3-1 Cycle Exposure Range Definitions (Reference 7)

Nomenclature Cycle Exposure Range BOC to MOC BOC18 to (EOR18 -2912 MWd/ST)

MOC to EOC (EOR18 -2912 MWd/ST) to EOC18 BOC to EOG BOC18 to EOC18 LaSalle Unit 1 Cycle 18 Page 7 of 21

COLR LaSalle 1 Revision 17

4. Average Planar Linear Heat Generation Rate Technical Specification Sections 3.2.1 and 3.4.1 MAPLHGR values as a function of average planar exposure are given in Table 4-1. During SLO, these limits are multiplied by the SLO multiplier listed in Table 4-2. The MAPLHGR values in Table 4-1 along with the MAPLHGR SLO multiplier in Table 4-2 provide coverage for all modes of operation.

Table 4-1 MAPLHGR for GNF2 Fuel (Reference 7)

Avg. Planar MAPLHGR Exposure Limit fGWd/ST) (kW/FT) 0.00 13.78 17.15 13.78 60.78 6.87 63.50 5.50 Table 4-2 MAPLHGR SLO Multiplier for GNF2 Fuel, BOC to EOC (Reference 7)

SLO Fuel Type MAPLHGR Multiplier GNF2 0.78 LaSalle Unit 1 Cycle 18 Page 8 of 21

COLR LaSalle 1 Revision 17

5. Operating Limit Minimum Critical Power Ratio Technical Specification Sections 3.2.2. 3.3.4.1. 3.4.1. and 3.7.7 5.1. Manual Flow Control MCPR Limits The rated OLMCPRs given in Table 5-2 are the maximum values obtained from analysis of the pressurization events, non-pressurization events, LOCA initial MCPR, and the Option Ill stability evaluation. MCPR values are determined by the cycle-specific fuel reload analyses in Reference 7.

Table 5-2 is used in conjunction with the ARTS-based power (Kp) and flow (MCPRF) dependencies presented in Tables 5-3, 5-4, and 5-5 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.

5.1.1. Power-Dependent MCPR The power-dependent MCPR multiplier, KP, is determined from Table 5-3, 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.

5.1.2. Flow-Dependent MCPR Tables 5-4 through 5-5 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.

LaSalle Unit 1 Cycle 18 Page 9 of 21

COLR LaSalle 1 Revision 17 5.2. 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 5-1 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 5-1 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 ~ 0.875 sec. ~ 0.672 sec .

  • The msert1on time to a notch pos1t1on 1s conservatively calculated usmg the CRD reed switch drop-out time per Reference 10.

5.3. 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 1 Cycle 18 Page 10 of 21

COLR LaSalle 1 Revision 17 Table 5-2 Operating Limit Minimum Critical Power Ratio (OLMCPR) for GNF2 Fuel (Reference 7)

Application Group DLO/SLO Exposure Range Option A Option B BOC-MOC 1.40 1.36 Base Case DLO MOC-EOC 1.40 1.36 BOC-MOC 1.59 1.59 Base Case SLO MOC-EOC 1.59 1.59 BOC-MOC 1.46 1.38 Base Case + TCVSC DLO

+ RPTOOS + PROOS MOC-EOC 1.46 1.38 BOC-MOC 1.59 1.59 Base Case + TCVSC SLO

+ RPTOOS + PROOS MOC-EOC 1.59 1.59 BOC-MOC 1.43 1.39 Base Case + TCVSC +

DLO TBVOOS (all 5 valves)

MOC-EOC 1.43 1.39 BOC-MOC 1.59 1.59 Base Case + TCVSC +

SLO TBVOOS (all 5 valves)

MOC-EOC 1.59 1.59 Base Case + TCVSC + BOC-MOC 1.49 1.41 TBVOOS (all 5 valves) DLO

+ RPTOOS + PROOS MOC-EOC 1.49 1.41 Base Case + TCVSC + BOC-MOC 1.59 1.59 TBVOOS (all 5 valves) SLO

+ RPTOOS + PROOS MOC-EOC 1.59 1.59 BOC-MOC 1.40 1.36 Base Case with TCVIS DLO MOC-EOC 1.40 1.36 BOC-MOC 1.59 1.59 Base Case with TCVIS SLO MOC-EOC 1.59 1.59 Base Case + TCVSC +

TBVOOS (all 5 valves) BOC-MOC 1.49 1.41

+ RPTOOS + PROOS DLO with TCVIS MOC-EOC 1.49 1.41 Base Case + TCVSC + BOC-MOC 1.59 1.59 TBVOOS (all 5 valves)

SLO

+ RPTOOS + PROOS with TCVIS MOC-EOC 1.59 1.59 LaSalle Unit 1 Cycle 18 Page11 of21

COLR LaSalle 1 Revision 17 Table 5-3 Power-Dependent MCPR Multipliers (KP) for GNF2 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 with TCVIS LaSalle Unit 1 Cycle 18 Page 12 of 21

COLR LaSalle 1 Revision 17 Table 5-4 DLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 Fuel, BOC to EOC, All Application Groups, Option A and Option B (Reference 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 5-5 SLO Flow-Dependent MCPR Limits (MCPRF) for GNF2 Fuel, BOC to EOC, All Application Groups, Option A and Option B (References 7)

Flow MCPRF

(%Rated) 0.0 1.91 30.0 1.73 105.0 1.27 LaSalle Unit 1 Cycle 18 Page 13 of 21

COLR LaSalle 1 Revision 17

6. Linear Heat Generation Rate Technical Specification Sections 3.2.3 and 3.4.1 The LHGR limit is the product of the exposure dependent LHGR limit from Table 6-1 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 6-2. The LHGRFACF multiplier is determined from Table 6-3 or Table 6-4. The SLO multipliers in Table 6-3 and Table 6-4 have been limited to a maximum value of 0.78, the SLO LHGR multiplier for GNF2 fuel.

Table 6-1 LHGR Limit for GNF2 Fuel

{Reference 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 1 Cycle 18 Page 14 of 21

COLR LaSalle 1 Revision 17 Table 6-2 Power-Dependent LHGR Multipliers (LHGRFACp) for GNF2 Fuel, DLO and SLO, BOC to EOC (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 1 Cycle 18 Page 15 of21

COLR LaSalle 1 Revision 17 Table 6-3 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, Pressurization (1 TCV/TSV Closed or COS), All Application Groups (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 6-4 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, No Pressurization (All TCV/TSV In-Service), All Application Groups (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 1 Cycle 18 Page 16 of 21

COLR LaSalle 1 Revision 17

7. 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 7-1 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% per technical specification 3.3c.

LaSalle Unit 1 Cycle 18 Page 17 of 21

COLR LaSalle 1 Revision 17

8. Traversing In-Core Probe System (Reference 12) 8.1. 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 (Reference 4):

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).

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

8.2. 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 1 Cycle 18 Page 18 of 21

COLR LaSalle 1 Revision 17

9. Stability Protection Setpoints Technical Specification Section 3.3.1.3 Table 9-1 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 1 Cycle 18 Page 19 of 21

COLR LaSalle 1 Revision 17

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

Table 10-1 Allowed Modes of Operation and EOOS Combinations (Reference 7)

Equipment Out of Service Options Short Name Base Case Base Base Case + SLO Base SLO Base Case + TCVSC + RPTOOS + PROOS Combined EOOS 1 Base Case + TCVSC + RPTOOS + PROOS + SLO Combined EOOS 1 SLO Base Case + TCVSC + TBVOOS (all 5 valves) Combined EOOS 2 Base Case+ TCVSC + TBVOOS (all 5 valves)+ SLO Combined EOOS 2 SLO Base Case + TCVSC + TBVOOS (all 5 valves) + RPTOOS + PROOS Combined EOOS 3 Base Case+ TCVSC + TBVOOS (all 5 valves) + RPTOOS + PROOS + SLO Combined EOOS 3 SLO Base Case with TCVIS Base TCVIS Base Case + SLO with TCVIS Base SLO TCVIS Base Case + TCVSC + TBVOOS (all 5 valves) + RPTOOS + PROOS with Combined EOOS 3 TCVIS TCVIS Base Case + TCVSC + TBVOOS (all 5 valves) + RPTOOS + PROOS + SLO Combined EOOS 3 SLO with TCVIS TCVIS (1) Base case includes 1 SRVOOS + 1 TCVfTSV OOS + FWHOOS/FFWTR + 1 MSIVOOS + 2 TBVOOS + PLUOOS, and also includes 1 TIPOOS (up to 14 TIP channels not available) any time during the cycle, including BOC, and up to 25% of the LPRMs out-of-service (failed or rejected) (Reference 4). The one TCV and/or TSV EOOS conditions require power level s 85% of rated. The one MSIVOOS condition is also supported as long as thermal power is maintained s 75% of the rated (Reference 7). The FWHOOS/FFWTR analyses cover a maximum reduction of 100°F for the feedwater temperature. A nominal LPRM calibration interval of 2000 EFPH (2500 EFPH maximum) is supported for LaSalle Unit 1. (Reference 2).

(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 not credited to open in pressure control. For the 2 TBVOOS condition that is a part of the base case, the assumption is that both of the 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). The MCFL is currently set at 126.6 (Reference 9) and will only allow opening of TBVs #1, #2, #3, and #4 during a slow pressurization event. The MCFL does not use the TBV position feedback signal to know how many TBVs have opened or how far each has opened. The #5 TBV is not available based on the current MCFL setpoint 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 (Reference 7 Application Groups} are applicable to ELLLA, MELLLA, ICF and Coastdown realms of operation with the exception that SLO is not applicable to MELLLA or ICF. The MOC to EOC exposure range limit sets are generated by GNF to include application to coastdown operation. Coastdown operation down to 40% reactor power is supported. During coastdown, operation at a power level above that which can be achieved (at all-rods-out with all cycle extensions features utilized, e.g., ICF, FFWTR) with steady-state equilibrium xenon concentrations is not supported.(Methodology Reference 1 and Reference 7).

(5) All EOOS options in Table 10-1 can be used in Option A or B.

LaSalle Unit 1 Cycle 18 Page 20 of 21

COLR LaSalle 1 Revision 17

11. 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-24 (Revision 24), "General Electric Standard Application for Reactor Fuel,"

March 2017 and the U.S. Supplement NEDE-24011-P-A-24-US, March 2017.

LaSalle Unit 1 Cycle 18 Page 21of21

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