RA22-010, Cycle 20 Core Operating Limits Reports
| ML22080A134 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 03/21/2022 |
| From: | Hansett P Constellation Energy Generation |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation, NRC/RGN-III |
| References | |
| RA22-010 | |
| Download: ML22080A134 (27) | |
Text
Constellation RA22-010 March 21, 2022 U.S. Nuclear Regulatory Commission Attention: NRC Region Ill Administrator 2443 Warrenville Road, Suite 210 Lisle, IL 60532-4352
Subject:
LaSalle County Station, Unit 1 Renewed Facility Operating License No. NPF-11 NRC Docket Nos. 50-373 Unit 1 Cycle 20 Core Operating Limits Reports LaSalle County Station 2601 North 21 " Road Marseilles, IL 61341 815-415-2000 Telephone 10 CFR 50.4 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 revision 20.
The Unit 1 COLR was revised for LSCS Unit 1 Cycle 20 (L 1 C20).
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.
Resi:}/-l 1
~
Phil W. Hansett Site Vice President LaSalle County Station
Enclosure:
LaSalle Unit 1 COLR revision 20 cc:
Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - LaSalle County Station
Prepared By:
Reviewed By:
Reviewed By:
Reviewed By:
Approved By:
Station Qualified Review By:
COLR LaSalle 1 Rev 20 Core Operating Limits Report For LaSalle Unit 1 Cycle 20 0!91tally signed by Glenn. Corie ON: cn=Glenn, Corie I\\ Date: 2022 02.t0 14:30:37
- 06'00" Corie Glenn, NF CM Ann Eastmond, NF CM Digitally signed by Eastmond, Ann DN: cn"'Eastmond, Ann Date: 2022.02.1 o 14:36:1 o -06'00'
~
7.I?/~ ll. 2022.02.11 06:29:08 -06'00' JT Markland, ESA Rash. Eric J 2022-02-11 10:02-06:00 Eric Rash, RE Kovacs Ashley Digitally signed by Kovacs.Ashley Date: 2022.02.15 12:25:37 -06'00' Ashley Kovacs, NF CM Karl Hachmuth, RE HacHmuth, Karl H 2022-02-17 12:50-06:00 Page 1 of 26 Date: _____ _
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COLR LaSalle 1 Rev 20 Table of Contents Page Record of COLR LaSalle 1 Cycle 20 Revisions.................................................................................... 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.............................................................................. 11
- 5. LHGR.............................................................................................................................................. 16
- 6. Rod Block Monitor........................................................................................................................... 21
- 7. Traversing In-Core Probe System.................................................................................................. 22 7.1. Description.............................................................................................................................. 22 7.2. Bases...................................................................................................................................... 22
- 8. Stability Protection Setpoints........................................................................................................... 23
- 9. Modes of Operation......................................................................................................................... 24
- 10. Methodology.................................................................................................................................. 25
- 11. References.................................................................................................................................... 26 Page 2 of 26
COLR LaSalle 1 Rev 20 Record of COLR LaSalle 1 Cycle 20 Revisions Revision Description 20 Initial issuance for L 1 C20.
Page 3 of 26
COLR LaSalle 1 Rev 20 List of Tables Table 2-1 Cycle Exposure Range Definitions........................................................................................... 7 Table 3-1 MAPLHGR versus Average Planar Exposure for GNF2 Fuel................................................... 8 Table 3-2 MAPLHGR versus Average Planar Exposure for GNF3 Fuel................................................... 8 Table 3-3 MAPLHGR SLO Multiplier for GNF2 and GNF3 Fuel............................................................... 8 Table 4-1 Scram Times Required for Option A and Option B Application at Notch Position 39............. 1 O Table 4-2 Operating Limit Minimum Critical Power Ratio (OLMCPR) for GNF2 and GNF3 Fuel........... 12 Table 4-3 Power Dependent MCPR Multipliers (KP) for GNF2 and GNF3 Fuel..................................... 13 Table 4-4 DLO Flow Dependent MCPR Limits (MCPRF) for GNF2 Fuel................................................ 14 Table 4-5 DLO Flow Dependent MCPR Limits (MCPRF) for GNF3 Fuel................................................ 14 Table 4-6 SLO Flow Dependent MCPR Limits (MCPRF) for GNF2 Fuel................................................ 14 Table 4-7 SLO Flow-Dependent MCPR Limits (MCPRF) for GNF3 Fuel................................................ 15 Table 4-8 Cycle Specific SLMCPR (MCPR99.9%)..................................................................................... 15 Table 5-1 LHGR Limit for GNF2 Fuel..................................................................................................... 16 Table 5-2 LHGR Limit for GNF3 Fuel..................................................................................................... 16 Table 5-3 Power Dependent LHGR Multipliers (LHGRFACp) for GNF2 Fuel, DLO and SLO................ 17 Table 5-4 Power Dependent LHGR Multipliers (LHGRFACp) for GNF3 Fuel, DLO and SLO................ 18 Table 5-5 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, All Application Groups except Base Case with TCV/TSV In-Service............................................................. 19 Table 5-6 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, Base Case with TCV/TSV In-Service........................................................................................................ 19 Table 5-7 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF3 Fuel, BOC to EOC, All Cases.... 20 Table 6-1 Rod Block Monitor Setpoints.................................................................................................. 21 Table 8-1 OPRM PBDA Trip Setpoints................................................................................................... 23 Table 9-1 Allowed Modes of Operation and EOOS Combinations......................................................... 24 Page 4 of 26
COLR LaSalle 1 Rev 20
- 1. Terms and Definitions ARO ARTS BOC CRD DLO EOG EOOS EOR FFWTR FWHOOS GNF ICF KP L1C20 LHGR LHGRFACF LHGRFACp LOCA LPRM MAPLHGR MCPR MCPR999%
MELLLA MOC MSIVOOS MSR MSROOS OLMCPR OOS OPRM PBDA PLUOOS PROOS RPTOOS RWE SLMCPR All Rods Out Average Power Range Monitor, Rod Block Monitor and Technical Specification Improvement Program Beginning of cycle Control rod drive Dual loop operation End of cycle Equipment out of service End of rated - Cycle exposure corresponding to all rods out, 100% power/100%
flow, and normal feedwater temperature Final feedwater temperature reduction Feedwater heater out of service Global Nuclear Fuels - Americas Increased core flow Power-dependent MCPR multiplier LaSalle Unit 1 Cycle 20 Linear heat generation rate Flow-dependent LHGR multiplier Power-dependent LHGR multiplier Loss of coolant accident Local power range monitor Maximum average planar linear heat generation rate Minimum critical power ratio Limiting MCPR value such that 99.9% of the fuel in the core is not susceptible to boiling transition Flow-dependent MCPR Power-dependent MCPR, which is equal to the operating limit MCPR multiplied by KP Maximum extended load line limit analysis Middle of cycle point for licensing purposes Main steam isolation valve out of service Moisture separator reheater Moisture separator reheater out of service Operating limit minimum critical power ratio Out of service Oscillation power range monitor Period based detection algorithm Power load unbalance out of service Pressure regulator out of service Recirculation pump trip out of service Rod withdrawal error Safety limit minimum critical power ratio Page 5 of 26
COLR LaSalle 1 Rev 20
- 1. Terms and Definitions (continued)
SLO SRVOOS TBV TBVOOS TCV TCVIS TCVSC TIP TSV 3DM Single loop operation Safety/relief valve out of service Turbine bypass valve Turbine bypass valve out of service Turbine control valve All Turbine Control Valves/Turbine Stop Valves in-service Turbine control valve slow closure Traversing in-core probe Turbine stop valve 3D Monicore Page 6 of 26
COLR LaSalle 1 Rev 20
- 2. General Information 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 (rated core flow is 108.5 Mlbm/hr) (Reference 6)
ICF to 105% of rated core flow (Reference 7)
Coastdown to 40% rated power (rated core thermal power is 3546 MWth) (Reference 7) 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 (Reference 7)
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 (EOR20 - 4322 MWd/ST) means the projected Cycle 20 EOR exposure minus 4322 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 EOR20 - 4322 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. Per Reference 7, for L 1 C20 the exposure dependent limits are the same from BOC to MOC as they are from MOC to EOC so the limits are all being presented herein for an exposure range of BOC to EOC. However, the ranges of BOC to MOC and MOC to EOC are included in Table 2-1 for consistency with Reference 7.
Table 2-1 Cycle Exposure Range Definitions (Reference 7)
Nomenclature Cycle Exposure Range BOC to MOC BOC20 to (EOR20 - 4322 MWd/ST)
MOC to EOC (EOR20 - 4322 MWd/ST) to EOC20 BOC to EOC BOC20 to EOC20 Page 7 of 26
COLR LaSalle 1 Rev 20
- 3. MAPLHGR Technical Specification Sections 3.2.1 and 3.4.1 MAPLHGR values as a function of average planar exposure are given in Tables 3-1 and 3-2. During SLO, these limits are multiplied by the SLO multiplier listed in Table 3-3. Tables 3-1, 3-2, and 3-3 provide coverage for all modes of operation.
Table 3-1 MAPLHGR versus Average Planar Exposure for 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 versus Average Planar Exposure for GNF3 Fuel (Reference 7)
Average Planar MAPLHGR Limit Exposure (kW/ft)
(GWd/ST) 0.00 14.36 21.22 13.01 40.82 10.75 57.60 8.00 63.50 6.00 Table 3-3 MAPLHGR SLO Multiplier for GNF2 and GNF3 Fuel (Reference 7)
SLO Fuel Type MAPLHGR Multiplier GNF2 0.78 GNF3 0.90 Page 8 of 26
COLR LaSalle 1 Rev 20
- 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, 4-5, 4-6, and 4-7 below. The OLMCPR is determined for a given power and flovv 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 4-7 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 MCPRss 9%, can be found in Table 4-8 for dual loop and single loop operating conditions. The values in Table 4-8 were used to calculate the rated and off-rated MCPR limits.
Page 9 of 26
COLR LaSalle 1 Rev 20 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 10) (0.875 seconds at notch position 39, Reference 11 ).
To utilize the MCPR limits for the Option B scram speed insertion times, the core average scram speed time for insertion to notch 39 must be less than or equal to Ta (Reference 14, see equation 1 ).
TB = µ + 1.65
( _N_i -) (]"
or TB = 0.603 + 1.65 I;~! N,
( '°'~I.) 0.0106 L..1 = 1 N,
( 1)
Where ft (0.603 sec for LaSalle) is the mean of means plus two standard deviations scram insertion time to notch position 39 dropout and (J (0.0106 sec for LaSalle) is the standard deviation of the distribution for average scram insertion time to notch position 39 dropout used in the Option B scram speed statistical analysis, and where n is the number of surveillance tests performed in the cycle, Ni is the number of active control rods measured in surveillance test i, and N1 is the total number of active rods measured.
Alternatively, to use Option B, omitting the right-hand side of the Ta equation would be conservative, and is acceptable. 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.
Table 4-1 Scram Times Required for Option A and Option B Application at Notch Position 39 (References 11 and 14)
Notch Position*
Scram Time Required for Option A Scram Time Required for Option B Application (sec)
Application (sec)**
$; 0.603 OR 39
$; 0.875 (L,tl _)
0.0106
~ 0.603 + 1.65
\\ !=l NL
- The insertion time to a notch posItIon Is conservatively calculated using the CRD reed switch drop-out time per Reference 11 and interpolation with scram time values per Reference 10.
Page 10 of 26
COLR LaSalle 1 Rev 20 4.3. Recirculation Flow Control Valve Settings Cycle 20 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).
Page 11 of 26
COLR LaSalle 1 Rev 20 Table 4-2 Operating Limit Minimum Critical Power Ratio (OLMCPR) for GNF2 and GNF3 Fuel (Reference 7)
Application Group DLO/
Exposure Range/
Option A Option B SLO Fuel Type BOC-EOC (GN F2) 1.36 1.33 DLO BOC-EOC (GNF3) 1.36 1.33 Base Case BOC-EOC (GNF2) 1.59 1.59 SLO BOC-EOC (GNF3) 1.56 1.56 BOC-EOC (GNF2) 1.40 1.34 DLO Base Case + TCVSC BOC-EOC (GNF3) 1.40 1.34
+ RPTOOS +
PROOS + MSROOS BOC-EOC (GNF2) 1.59 1.59 SLO BOC-EOC (GNF3) 1.56 1.56 BOC-EOC (GNF2) 1.39 1.33 DLO Base Case + TCVSC BOC-EOC (GNF3) 1.39 1.33
+ TBVOOS (all 5 BOC-EOC (GNF2) 1.59 1.59 valves)
SLO BOC-EOC (GNF3) 1.56 1.56 BOC-EOC (GNF2) 1.44 1.37 Base Case + TCVSC DLO BOC-EOC (GNF3) 1.44 1.37
+ TBVOOS (all 5 valves)+ RPTOOS +
BOC-EOC (GNF2) 1.59 1.59 PROOS + MSROOS SLO BOC-EOC (GNF3) 1.56 1.56 BOC-EOC (GNF2) 1.36 1.33 DLO BOC-EOC (GNF3) 1.36 1.33 Base Case with TCVIS BOC-EOC (GNF2) 1.59 1.59 SLO BOC-EOC (GNF3) 1.56 1.56 BOC-EOC (GNF2) 1.44 1.37 Base Case + TCVSC DLO
+ TBVOOS (all 5 BOC-EOC (GNF3) 1.44 1.37 valves)+ RPTOOS +
BOC-EOC (GNF2) 1.59 1.59 PROOS + MSROOS with TCVIS SLO BOC-EOC (GNF3) 1.56 1.56 Page 12 of 26
COLR LaSalle 1 Rev 20 Table 4-3 Power Dependent MCPR Multipliers (KP) for GNF2 and GNF3 Fuel (Reference 7)
Core Thermal Power (% rated) 0 25 45 60 S 85
> 85 100 Application Group KP, Operating Limit MCPR Multiplier Base Case 1.150 1.150 1.150 1.150 1.056 1.056 1.000 Base Case + TCVSC
+ RPTOOS +
1.242 1.242 1.207 1.178 1.111 1.064 1.000 PROOS + MSROOS Base Case + TCVSC
+ TBVOOS (all 5 1.150 1.150 1.150 1.150 1.058 1.058 1.000 valves)
Base Case + TCVSC
+ TBVOOS (all 5 1.242 1.242 1.207 1.178 1.111 1.070 1.000 valves) + RPTOOS +
PROOS + MSROOS Base Case with 1.150 1.150 1.150 1.150 1.056 1.056 1.000 TCVIS Base Case + TCVSC
+ TBVOOS (all 5 valves)+ RPTOOS + 1.242 1.242 1.207 1.178 1.111 1.070 1.000 PROOS + MSROOS with TCVIS Page 13 of 26
COLR LaSalle 1 Rev 20 Table 4-4 DLO Flow Dependent MCPR Limits (MCPRF) for GNF2 Fuel (Reference 7)
Flow MCPRF
(% Rated)
Limit 0.0 1.88 30.0 1.70 105.0 1.24*
Table 4-5 DLO Flow Dependent MCPR Limits (MCPRF) for GNF3 Fuel (Reference 7)
Flow MCPRF
(% Rated)
Limit 0.0 1.76 30.0 1.56 84.7 1.20*
105.0 1.20*
Table 4-6 SLO Flow Dependent MCPR Limits (MCPRF) for GNF2 Fuel (Reference 7)
Flow MCPRF
(% Rated) 0.0 1.90 30.0 1.72 105.0 1.26
- 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.
Page 14 of 26
COLR LaSalle 1 Rev 20 Table 4-7 SLO Flow-Dependent MCPR Limits (MCPRF) for GNF3 Fuel (Reference 7)
Flow MCPRF
(% Rated) 0.0 1.78 30.0 1.58 84.7 1.22*
105.0 1.22*
- 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 4-8 Cycle Specific SLMCPR (MCPRss.s3/4)
(Reference 7)
Flow MCPRss.s3/4 DLO 1.08 SLO 1.10 Page 15 of 26
COLR LaSalle 1 Rev 20
- 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 or Table 5-2 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 5-3 and Table 5-4. The LHGRFACF multiplier is determined from Table 5-5, Table 5-6 or Table 5-7. The SLO multipliers in Table 5-5 and Table 5-6 have been limited to a maximum value of 0.78, the SLO LHGR multiplier for GNF2 fuel. The SLO multipliers in Table 5-7 have been limited to a maximum value of 0.90, the SLO LHGR multiplier for GNF3 fuel (Reference 7).
Table 5-1 LHGR Limit for GNF2 Fuel (References 5 and 8)
Peak Pellet I U02 LHGR Limit Exposure See Table B-1 of Reference 8 Peak Pellet I Gadolinia LHGR Exposure Limit See Table B-2 of Reference 8 Table 5-2 LHGR Limit for GNF3 Fuel (References 5 and 9)
Peak Pellet I U02 LHGR Limit Exposure See Table A-1 of Reference 9 Peak Pellet I Gadolinia LHGR Exposure Limit See Table A-2 of Reference 9 Page 16 of 26
COLR LaSalle 1 Rev 20 Table 5-3 Power Dependent LHGR Multipliers (LHGRFACp) for 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 + MSROOS 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 + MSROOS 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 + MSROOS with TCVIS Page 17 of 26
COLR LaSalle 1 Rev 20 Table 5-4 Power Dependent LHGR Multipliers (LHGRFACp) for GNF3 Fuel, DLO and SLO (Reference 7)
Core Thermal Power (% rated)
Application Group 0
25 45 60 85 100 LHGRFACp Multiplier Base Case 1.000 1.000 1.000 1.000 1.000 1.000 Base Case + TCVSC
+ RPTOOS +
0.720 0.720 0.850 0.940 1.000 1.000 PROOS + MSROOS Base Case + TCVSC
+ TBVOOS (all 5 0.955 0.955 0.955 1.000 1.000 1.000 valves)
Base Case + TCVSC
+ TBVOOS (all 5 0.720 0.720 0.850 0.940 1.000 1.000 valves) + RPTOOS +
PROOS + MSROOS Base Case with 1.000 1.000 1.000 1.000 1.000 1.000 TCVIS Base Case + TCVSC
+ TBVOOS (all 5 valves)+ RPTOOS + 0.720 0.720 0.850 0.940 1.000 1.000 PROOS + MSROOS with TCVIS Page 18 of 26
COLR LaSalle 1 Rev 20 Table 5-5 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, All Application Groups except Base Case with TCV/TSV In-Service (Reference 7)
Flow DLO LHGRFACF SLO LHGRFACF
(% Rated) 0.00 0.110 0.110 30.00 0.410 0.410 67.00 0.780 0.780 89.00 1.000 0.780 105.00 1.000 0.780 Table 5-6 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF2 Fuel, BOC to EOC, Base Case with TCV/TSV In-Service (Reference 7)
Flow DLO LHGRFACF SLO LHGRFACF
(% Rated) 0.00 0.250 0.250 30.00 0.550 0.550 53.00 0.780 0.780 75.00 1.000 0.780 105.00 1.000 0.780 Page 19 of 26
COLR LaSalle 1 Rev 20 Table 5-7 Flow-Dependent LHGR Multipliers (LHGRFACF) for GNF3 Fuel, BOC to EOC, All Cases (Reference 7)
Flow DLO LHGRFACF SLO LHGRFACF
(% Rated) 0.00 0.307 0.307 30.00 0.584 0.584 64.18 0.900 0.900 75.00 1.000 0.900 105.00 1.000 0.900 Page 20 of 26
COLR LaSalle 1 Rev 20
- 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 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 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 (Wci) of 100%.
Page 21 of 26
COLR LaSalle 1 Rev 20
- 7. Traversing In-Core Probe System (References 2, 4, and 12) 7.1. Description When the traversing in-core probe (Tl P) 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% (Reference 4). In addition, no more than 22 TIP channels can be OOS (failed or rejected)
(Reference 2).
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 22 of 26
- 8. Stability Protection Setpoints Technical Specification Section 3.3.1.3 COLR LaSalle 1 Rev 20 Table 8-1 OPRM PBDA Trip Setpoints (Reference 7)
PBDA Trip Amplitude Setpoint (Sp)
Corresponding Maximum 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 23 of 26
COLR LaSalle 1 Rev 20
- 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 H2l(3H4) (5) (6)
Short Names Base Case BASE_DLO_OPTB(A)
Base Case+ SLO BASE_SLO _ OPTB(A)
Base Case + TCVSC + RPTOOS + PROOS + MSROOS EOOS1_DLO_OPTB(A)
Base Case + TCVSC + RPTOOS + PROOS + MSROOS + SLO EOOS 1 _ SLO _ OPTB(A)
Base Case+ TCVSC + TBVOOS (all S valves)
EOOS2_DLO _ OPTB(A)
Base Case+ TCVSC + TBVOOS (all S valves)+ SLO EOOS2_SLO_OPTB(A)
Base Case+ TCVSC + TBVOOS (all S valves)+ RPTOOS +
EOOS3_DLO _ OPTB(A)
PROOS + MSROOS Base Case+ TCVSC + TBVOOS (all S valves)+ RPTOOS +
EOOS3_ SLO _ OPTB(A)
PROOS + MSROOS + 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 S valves)+ RPTOOS +
EOOS3_ TCVIS_DLO_OPTB(A)
PROOS + MSROOS with TCVIS Base Case+ TCVSC + TBVOOS (all S valves)+ RPTOOS +
EOOS3_ TCVIS _ SLO _ OPTB(A)
PROOS + MSROOS + SLO with TCVIS (1) Base case includes 1 SRVOOS + 1 TCV/TSV OOS + FWHOOS/FFWTR + 1 MSIVOOS + 1 TBVOOS + PLUOOS. The one TCV and/or TSV OOS conditions require power level !> 85% of rated. The one MSIVOOS condition is also supported if thermal power is maintained !> 75% of rated (Reference 7).
(2) The 1 TBVOOS in the Base Case is not credited for fast opening or opening on pressure control (Reference 6). The assumption is that 1 TBV does not open on any signal and thus remains shut for the transients analyzed (i.e. 4 TBVs are credited and assumed in-service) (Reference 10).
(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 (Reference 13).
(4) The+ sign that is used in the Equipment Out of Service Option/ 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).
(7) MSR is considered to be in-service when second stage reheat is receiving full flow (Reference 15).
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- 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-31 (Revision 31 ), "General Electric Standard Application for Reactor Fuel (GESTAR II)," November 2020 and the U.S. Supplement NEDE-24011-P-A-31-US, November 2020.
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COLR LaSalle 1 Rev 20
- 11. References
- 1.
Exelon Generation Company, LLC Docket No. 50-373 LaSalle County Station, Unit 1, Renewed Facility Operating License No. NPF-11.
- 2.
GNF Report 005N6665, Revision 0, "Exelon BWR Fleetwide Technical Evaluation of 50% TIP Strings Out-of-Service on Methods Uncertainties," March 2020.
- 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 006N0391, Revision 0, "Fuel Bundle Information Report for LaSalle Unit 1 Reload 19 Cycle 20," December 2021.
- 6.
Exelon Transmittal NF210468, Revision 0, "LaSalle Unit 1 Cycle 20 FRED Form," July 27, 2021.
- 7.
GNF Report 006N0390, Revision 0, "Supplemental Reload Licensing Report for LaSalle Unit 1 Reload 19 Cycle 20," December 2021.
- 8.
GNF Document No. NEDC-33270P, Revision 11, "GNF2 Advantage Generic Compliance with NEDE-24011-P-A (GESTAR II)", August 2020.
- 9.
GNF Document No. NEDC-33879P, Revision 4, "GNF3 Generic Compliance with NEDE-24011-P-A (GESTAR II)," August 2020.
- 10. Exelon Transmittal NF210498, Revision 1, "LaSalle Unit 1 Cycle 20 Completed OPL-3 Form,"
September 8, 2021.
11. GNF Letter ORF A12-00038-3, Vol. 4, "Scram Times versus Notch Position," May 22, 1992.
- 12. NRC Letter, "Issuance of Amendments (TAC Nos. M95156 and M95157)," October 29, 1996.
- 13. Exelon Transmittal ES1900018, Revision 2, "LaSalle GNF3 Nuclear Fuel Transition Design Inputs
- F0900 Cycle-Independent Transient Analysis," November 13, 2020.
- 14. GNF Report 005N5612, Revision 0, "LaSalle County Station Option B' Scram Speed Implementation Engineering Report," January 2020.
- 15. Exelon Engineering Change 0000630152, Revision 1, "GNF3 NFI F0900 MCFA and MSROOS Inputs," November 13, 2020.
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