SVP-23-013, Core Operating Limits Report Cycle 27

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Core Operating Limits Report Cycle 27
ML23101A066
Person / Time
Site: Quad Cities  Constellation icon.png
Issue date: 01/04/2023
From: Smith K
Constellation Energy Generation
To:
Office of Nuclear Reactor Regulation
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ML23101A062 List:
References
SVP-23-013
Download: ML23101A066 (32)
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COLR Quad Cities 2 Revision 16 Page 1 of 32 Core Operating Limits Report For Quad Cities Unit 2 Cycle 27 Prepared By: _____________________________________

Date: __________

Kevin Smith - Nuclear Fuels Reviewed By: _____________________________________

Date: __________

Adam Bracke - Nuclear Fuels Reviewed By: _____________________________________

Date: __________

JT Markland - Engineering Safety Analysis Reviewed By: _____________________________________

Date: __________

Alan Doran - Reactor Engineering Approved By: _____________________________________

Date: __________

Kristin McCoskey - NF Senior Manager, BWR Cycle Management SQR By:

Date: __________

Philip Fowler - Station Qualified Reviewer Smith, Kevin David Digitally signed by Smith, Kevin David Date: 2023.01.04 09:00:00 -06'00' Digitally signed by Bracke, Adam J Date: 2023.01.05 10:27:19 -05'00' Digitally signed by Markland, JT Thomas Date: 2023.01.10 08:38:47 -06'00' Doran, Alan M.

Digitally signed by Doran, Alan M.

Date: 2023.01.10 11:47:13 -06'00' Digitally signed by McCoskey, Kristin Date: 2023.01.25 16:26:35 -06'00' Fowler, Philip T Digitally signed by Fowler, Philip T Date: 2023.01.27 11:53:47 -06'00'

COLR Quad Cities 2 Revision 16 Page 2 of 32 Table of Contents Page Record of Quad Cities 2 Cycle 27 COLR Revisions........................................................ 3

1. Terms and Definitions................................................................................................. 5
2. General Information..................................................................................................... 6
3. Average Planar Linear Heat Generation Rate............................................................. 7
4. Operating Limit Minimum Critical Power Ratio............................................................ 9 4.1. Manual Flow Control MCPR Limits........................................................................ 9 4.1.1. Power-Dependent MCPR................................................................................ 9 4.1.2. Flow-Dependent MCPR.................................................................................. 9 4.2. Scram Time......................................................................................................... 10 4.3. Exposure Dependent MCPR Limits..................................................................... 11 4.4. Recirculation Pump ASD Settings....................................................................... 11
5. Linear Heat Generation Rate.................................................................................... 22
6. Control Rod Block Setpoints..................................................................................... 25
7. Stability Protection Setpoints..................................................................................... 26
8. Modes of Operation................................................................................................... 27
9. Methodology.............................................................................................................. 30
10. References.............................................................................................................. 32

COLR Quad Cities 2 Revision 16 Page 3 of 32 Record of Quad Cities 2 Cycle 27 COLR Revisions Revision Description 15 Initial issuance for Q2C27 16 Update scram times due to GNF3 transition

COLR Quad Cities 2 Revision 16 Page 4 of 32 List of Tables Page Table 3-1: MAPLHGR SLO Multiplier........................................................................................................... 7 Table 3-2: MAPLHGR for ATRIUM 10XM - All but Special Lattices............................................................ 7 Table 3-3: MAPLHGR for ATRIUM 10XM - Special Lattices....................................................................... 8 Table 4-1: Scram Times.............................................................................................................................. 10 Table 4-2: Exposure Basis for Transient Analysis...................................................................................... 11 Table 4-3: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times, BOC to EOFPLB (37,487 MWd/MTU CAVEX)........................................................................................................................ 12 Table 4-4: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times, BOC to EOFPLB (37,487 MWd/MTU CAVEX)........................................................................................................................ 13 Table 4-5: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times, BOC to EOFPLB (37,487 MWd/MTU CAVEX)........................................................................................................................ 14 Table 4-6: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times, EOFPLB to EOCLB (38,168 MWd/MTU CAVEX)........................................................................................................................ 15 Table 4-7: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times, EOFPLB to EOCLB (38,168 MWd/MTU CAVEX)........................................................................................................................ 16 Table 4-8: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times, EOFPLB to EOCLB (38,168 MWd/MTU CAVEX)........................................................................................................................ 17 Table 4-9: ATRIUM 10XM SLO MCPRp Limits for NSS Insertion Times, All Exposures........................... 18 Table 4-10: ATRIUM 10XM SLO MCPRp Limits for ISS Insertion Times, All Exposures........................... 19 Table 4-11: ATRIUM 10XM SLO MCPRp Limits for TSSS Insertion Times, All Exposures....................... 20 Table 4-12: ATRIUM 10XM MCPRf Limits.................................................................................................. 21 Table 5-1: LHGR Limits for ATRIUM 10XM................................................................................................ 22 Table 5-2: ATRIUM 10XM LHGRFACp Multipliers for All Scram Insertion Times, All Exposures.............. 23 Table 5-3: ATRIUM 10XM LHGRFACf Multipliers for All Exposures, All EOOS......................................... 24 Table 6-1: Rod Block Monitor Allowable Values......................................................................................... 25 Table 7-1: OPRM PBDA Trip Settings........................................................................................................ 26 Table 8-1: Modes of Operation................................................................................................................... 27 Table 8-2: Core Operational Restrictions for EOOS Conditions................................................................. 28

COLR Quad Cities 2 Revision 16 Page 5 of 32

1. Terms and Definitions AOO Anticipated operational occurrence ASD Adjustable Speed Drive BOC Beginning of cycle CAVEX Core average exposure CPR Critical power ratio CRWE Control rod withdrawal error EFPD Effective full power day EFPH Effective full power hour EOCLB End of cycle licensing basis EOFPL End of full power life EOFPLB End of full power licensing basis EOOS Equipment out of service FHOOS Feedwater heater out of service FWT Feedwater temperature FRV Feedwater Regulating Valve ICF Increased core flow ISS Intermediate scram speed kW/ft KiloWatts per foot 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 MANFRV1 Manual feedwater regulating valve scenario 1 (1 FRV in manual mode and the position is no more than 3% further open than the position of the FRV in automatic mode)

MANFRV2 Manual feedwater regulating valve scenario 2 (1 FRV in manual mode and the position is greater than 3% further open than the position of the FRV in automatic mode)

MCPR Minimum critical power ratio MCPRf Flow dependent MCPR MCPRp Power dependent MCPR MELLLA Maximum extended load line limit analysis MSIVOOS Main steam isolation valve out of service MWd/MTU MegaWatt days per metric ton Uranium NRC Nuclear Regulatory Commission NSS Nominal scram speed OLMCPR Operating limit minimum critical power ratio OOS Out of service OPRM Oscillation power range monitor PBDA Period based detection algorithm Pbypass Power below which direct scram on TSV/TCV closure is bypassed PCOOS Pressure controller out of service PLUOOS Power load unbalance out of service 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 valves out of service TCV Turbine control valve TCV SLOW C TCV slow closure TIP Traversing incore probe TLO Two loop operation TMOL Thermal mechanical operating limit TRM Technical Requirements Manual TSSS Technical Specification scram speed TSV Turbine stop valve

COLR Quad Cities 2 Revision 16 Page 6 of 32

2. General Information This report is prepared in accordance with Technical Specification 5.6.5. The Quad Cities Unit 2 Cycle 27 (Q2C27) reload is licensed by Framatome.

Licensed rated thermal power is 2957 MWth. Rated core flow is 98 Mlb/hr. Operation up to 108% rated core flow is licensed for this cycle. For allowed operating regions, see applicable power/flow map.

The licensing analysis supports full power operation to EOCLB (38,168 MWd/MTU CAVEX). Note that this value includes coastdown, where full power operation is not expected. The transient analysis limits are provided for operation up to specific CAVEX exposures as defined in Section 4.3.

Coastdown is defined as operation beyond EOFPL with the plant power gradually reducing as available core reactivity diminishes. The Q2C27 reload analyses do not credit this reduced power during coastdown and the EOCLB limits remain valid for operation up to rated power.

Power and flow dependent limits are listed for various power and flow levels. Linear interpolation on power and flow (as applicable) is to be used to find intermediate values.

MCPRp varies with scram speed. All other thermal limits are analyzed to remain valid with NSS, ISS, and TSSS.

LHGRFACf is independent of feedwater temperature and EOOS conditions.

For thermal limit monitoring above 100% rated power or 108% rated core flow, the 100% rated power and the 108% core flow thermal limit values, respectively, shall be used. Steady state operation is not allowed in this region. Limits are provided for transient conditions only.

COLR Quad Cities 2 Revision 16 Page 7 of 32

3. Average Planar Linear Heat Generation Rate Technical Specification Sections 3.2.1 and 3.4.1 Table 3-1 provides the MAPLHGR SLO multipliers for ATRIUM 10XM fuel.

For ATRIUM 10XM fuel, the lattice-specific MAPLHGR limits for TLO can be found in Tables 3-2 and 3-3.

During SLO, the limits in Tables 3-2 and 3-3 are multiplied by the SLO multiplier listed in Table 3-1.

Table 3-1: MAPLHGR SLO Multiplier (Reference 2)

Fuel Type Multiplier ATRIUM 10XM 0.80 Table 3-2: MAPLHGR for ATRIUM 10XM - All but Special Lattices (Reference 2)

Lattices All Cycle 25 Lattices Cycle 26 Lattices:

XMLCP-0720L-0G0a, XMLCB-0720L-0G0a, XMLCB-4494L-15G80, XMLCB-4491L-13G80, XMLCB-4491L-13G70, XMLCB-4633L-13G80, XMLCT-0720L-0G0a-MOD, XMLCT-0720L-0G0a, XMLCT-4428L-13G50, XMLCT-4399L-17GV80, XMLCTP-4399L-17GV80, XMLCT-4711L-12G70 All Cycle 27 Lattices Avg. Planar Exposure (MWd/MTU)

TLO MAPLHGR (kW/ft) 0 12.20 20,000 12.20 67,000 7.30

COLR Quad Cities 2 Revision 16 Page 8 of 32 Table 3-3: MAPLHGR for ATRIUM 10XM - Special Lattices (Reference 2)

Lattices Cycle 26 Lattices:

XMLCT-4424L-15G70, XMLCT-4424L-15G80, XMLCTP-4424L-15G80, XMLCT-4705L-13G80, XMLCTP-4705L-13G80 Avg. Planar Exposure (MWd/MTU)

TLO MAPLHGR (kW/ft) 0 12.20 15,000 12.20 67,000 7.30

COLR Quad Cities 2 Revision 16 Page 9 of 32

4. Operating Limit Minimum Critical Power Ratio Technical Specification Sections 3.2.2, 3.4.1, and 3.7.7 The OLMCPRs for Q2C27 are established so that less than 0.1% of the fuel rods in the core are expected to experience boiling transition during an AOO initiated from rated or off-rated conditions and support current Technical Specifications SLMCPR values (Reference 2).

Tables 4-3 through 4-12 include MCPR limits for the ATRIUM 10XM fuel bundles for various specified EOOS conditions. The EOOS conditions separated by / in these tables represent single EOOS conditions and not any combination of conditions. Refer to Section 8 for a detailed explanation of allowable EOOS conditions.

4.1. Manual Flow Control MCPR Limits The OLMCPR is determined for a given power and flow condition by evaluating the power-dependent MCPR and the flow-dependent MCPR and selecting the greater of the two.

4.1.1. Power-Dependent MCPR The OLMCPR as a function of core thermal power (MCPRp) is shown in Tables 4-3 through 4-11. MCPRp limits are dependent on scram times as described in Section 4.2, exposure as described in Section 4.3, FWT, fuel bundle core location, and whether the plant is in TLO or SLO. TLO limits for ATRIUM 10XM fuel are given in Tables 4-3 through 4-8 and SLO limits for ATRIUM 10XM fuel are given in Tables 4-9 through 4-11.

4.1.2. Flow-Dependent MCPR Table 4-12 gives the OLMCPR limit as a function of the flow (MCPRf) for fuel bundles based on the applicable plant condition for ATRIUM 10XM fuel.

COLR Quad Cities 2 Revision 16 Page 10 of 32 4.2. Scram Time TSSS, ISS, and NSS refer to scram speeds. The scram time values associated with these speeds are shown in Table 4-1. The TSSS scram times shown in Table 4-1 are the same as those specified in the Technical Specifications (Reference 4).

To utilize the OLMCPR limits for NSS in Tables 4-3, 4-6, and 4-9 the average control rod insertion time at each control rod insertion fraction must be equal to or less than the NSS time shown in Table 4-1 below.

To utilize the OLMCPR limits for ISS in Tables 4-4, 4-7, and 4-10 the average control rod insertion time at each control rod insertion fraction must be equal to or less than the ISS time shown in Table 4-1 below.

The Average Control Rod Insertion Time is defined as the sum of the control rod insertion times of all operable control rods divided by the number of operable control rods. Conservative adjustments to the NSS and ISS scram speeds were made to the analysis inputs to appropriately account for the effects of 1 stuck control rod and one additional control rod that is assumed to fail to scram (Reference 2).

To utilize the OLMCPR limits for TSSS in Tables 4-5, 4-8, and 4-11 the control rod insertion time of each operable control rod at each control rod insertion fraction must be less than or equal to the TSSS time shown in Table 4-1, with the exception that the Technical Specifications and reload licensing analysis allow operation with up to 12 slow and 1 stuck control rod. One additional control rod is assumed to fail to scram for the system transient analyses performed to establish MCPRp limits (Reference 2). Conservative adjustments to the TSSS scram speeds were made to the analysis inputs to appropriately account for the effects of the slow and stuck rods on scram reactivity (Reference 2).

For cases below 38.5% power (Pbypass), the results are relatively insensitive to scram speed, and only TSSS analyses were performed (Reference 2).

Table 4-1: Scram Times (References 2 and 4)

Control Rod Insertion Fraction

(%)

NSS (seconds)

ISS (seconds)

TSSS (seconds) 5 0.324 0.360 0.45 20 0.694 0.720 0.85 50 1.510 1.580 1.80 90 2.670 2.800 3.00

COLR Quad Cities 2 Revision 16 Page 11 of 32 4.3. Exposure Dependent MCPR Limits Exposure-dependent MCPRp limits were established to support operation for the entire cycle duration. Note that the thermal limits are based on CAVEX. The CAVEX values at which point the MCPRp limits are required to be changed are shown in Table 4-2 below. The limits at a later exposure range can be used earlier in the cycle as they are the same or more conservative.

Table 4-2: Exposure Basis for Transient Analysis (Reference 2)

Core Average Exposure (MWd/MTU)

Description 37,487 Design basis rod patterns to EOFPL

+ 25 EFPD (EOFPLB) 38,168 EOCLB - Maximum licensing core exposure, including coastdown 4.4. Recirculation Pump ASD Settings Technical Requirement Manual 2.1.a.1 Quad Cities 2 Cycle 27 was analyzed with a slow flow excursion event assuming a failure of the recirculation flow control system such that the core flow increases slowly to the maximum flow physically permitted by the equipment, assumed to be 112% of rated core flow (Reference 2);

therefore the recirculation pump ASD must be set to maintain core flow less than 112%

(109.76 Mlb/hr) for all runout events.

COLR Quad Cities 2 Revision 16 Page 12 of 32 Table 4-3: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times, BOC to EOFPLB (37,487 MWd/MTU CAVEX)

(Reference 2)

Nominal FWT EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS/MANFRV1*

60 2.48 2.48 2.17 1.88 1.38

> 60 2.64 2.64 2.25 TBVOOS 60 3.37 3.37 2.56 1.94 1.38

> 60 3.48 3.48 2.70 MANFRV2*

60 2.48 2.48 2.17 1.97 1.40

> 60 2.64 2.64 2.25 TCV Slow Closure/

PLUOOS/PCOOS 60 2.48 2.48 2.24 2.24 1.38

> 60 2.64 2.64 2.25 FHOOS EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS 60 2.67 2.67 2.27 2.02 1.38

> 60 2.67 2.67 2.27 TBVOOS 60 3.59 3.59 2.65 2.02 1.40

> 60 3.59 3.59 2.78 TCV Slow Closure/

PLUOOS/PCOOS 60 2.67 2.67 2.27 2.24 1.38

> 60 2.67 2.67 2.27 MANFRV1*

60 2.67 2.67 2.27 2.02 1.38

> 60 2.67 2.67 2.27

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 13 of 32 Table 4-4: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times, BOC to EOFPLB (37,487 MWd/MTU CAVEX)

(Reference 2)

Nominal FWT EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS/MANFRV1*

60 2.48 2.48 2.17 1.88 1.38

> 60 2.64 2.64 2.25 TBVOOS 60 3.37 3.37 2.56 1.94 1.38

> 60 3.48 3.48 2.70 MANFRV2*

60 2.48 2.48 2.17 1.97 1.41

> 60 2.64 2.64 2.25 TCV Slow Closure/

PLUOOS/PCOOS 60 2.48 2.48 2.24 2.24 1.38

> 60 2.64 2.64 2.25 FHOOS EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS 60 2.67 2.67 2.27 2.02 1.38

> 60 2.67 2.67 2.27 TBVOOS 60 3.59 3.59 2.65 2.02 1.40

> 60 3.59 3.59 2.78 TCV Slow Closure/

PLUOOS/PCOOS 60 2.67 2.67 2.27 2.24 1.38

> 60 2.67 2.67 2.27

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 14 of 32 Table 4-5: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times, BOC to EOFPLB (37,487 MWd/MTU CAVEX)

(Reference 2)

Nominal FWT EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS/MANFRV1*

60 2.48 2.48 2.17 1.95 1.38

> 60 2.64 2.64 2.25 TBVOOS 60 3.37 3.37 2.56 1.97 1.41

> 60 3.48 3.48 2.70 MANFRV2*

60 2.48 2.48 2.17 1.99 1.44

> 60 2.64 2.64 2.25 TCV Slow Closure/

PLUOOS/PCOOS 60 2.48 2.48 2.25 2.25 1.43

> 60 2.64 2.64 2.25 FHOOS EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS 60 2.67 2.67 2.27 2.10 1.38

> 60 2.67 2.67 2.27 TBVOOS 60 3.59 3.59 2.65 2.11 1.43

> 60 3.59 3.59 2.78 TCV Slow Closure/

PLUOOS/PCOOS 60 2.67 2.67 2.27 2.25 1.43

> 60 2.67 2.67 2.27

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 15 of 32 Table 4-6: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times, EOFPLB to EOCLB (38,168 MWd/MTU CAVEX)

(Reference 2)

Nominal FWT EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS/MANFRV1*

60 2.48 2.48 2.17 1.88 1.38

> 60 2.64 2.64 2.25 TBVOOS 60 3.37 3.37 2.56 1.94 1.38

> 60 3.48 3.48 2.70 MANFRV2*

60 2.48 2.48 2.17 1.97 1.40

> 60 2.64 2.64 2.25 TCV Slow Closure/

PLUOOS/PCOOS 60 2.48 2.48 2.24 2.24 1.38

> 60 2.64 2.64 2.25 FHOOS EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS 60 2.67 2.67 2.27 2.02 1.38

> 60 2.67 2.67 2.27 TBVOOS 60 3.59 3.59 2.65 2.02 1.40

> 60 3.59 3.59 2.78 TCV Slow Closure/

PLUOOS/PCOOS 60 2.67 2.67 2.27 2.24 1.38

> 60 2.67 2.67 2.27 MANFRV1*

60 2.67 2.67 2.27 2.02 1.38

> 60 2.67 2.67 2.27

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 16 of 32 Table 4-7: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times, EOFPLB to EOCLB (38,168 MWd/MTU CAVEX)

(Reference 2)

Nominal FWT EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS/MANFRV1*

60 2.48 2.48 2.17 1.88 1.38

> 60 2.64 2.64 2.25 TBVOOS 60 3.37 3.37 2.56 1.94 1.38

> 60 3.48 3.48 2.70 MANFRV2*

60 2.48 2.48 2.17 1.97 1.41

> 60 2.64 2.64 2.25 TCV Slow Closure/

PLUOOS/PCOOS 60 2.48 2.48 2.24 2.24 1.38

> 60 2.64 2.64 2.25 FHOOS EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS 60 2.67 2.67 2.27 2.02 1.38

> 60 2.67 2.67 2.27 TBVOOS 60 3.59 3.59 2.65 2.02 1.40

> 60 3.59 3.59 2.78 TCV Slow Closure/

PLUOOS/PCOOS 60 2.67 2.67 2.27 2.24 1.38

> 60 2.67 2.67 2.27

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 17 of 32 Table 4-8: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times, EOFPLB to EOCLB (38,168 MWd/MTU CAVEX)

(Reference 2)

Nominal FWT EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS/MANFRV1*

60 2.48 2.48 2.17 1.95 1.38

> 60 2.64 2.64 2.25 TBVOOS 60 3.37 3.37 2.56 1.97 1.41

> 60 3.48 3.48 2.70 MANFRV2*

60 2.48 2.48 2.17 1.99 1.44

> 60 2.64 2.64 2.25 TCV Slow Closure/

PLUOOS/PCOOS 60 2.48 2.48 2.25 2.25 1.43

> 60 2.64 2.64 2.25 FHOOS EOOS Condition Core Flow

(% rated)

Core Power (% rated) 0 25 38.5

> 38.5 100 Base/TCV Stuck Closed/MSIVOOS 60 2.67 2.67 2.27 2.10 1.38

> 60 2.67 2.67 2.27 TBVOOS 60 3.59 3.59 2.65 2.11 1.43

> 60 3.59 3.59 2.78 TCV Slow Closure/

PLUOOS/PCOOS 60 2.67 2.67 2.27 2.25 1.43

> 60 2.67 2.67 2.27

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 18 of 32 Table 4-9: ATRIUM 10XM SLO MCPRp Limits for NSS Insertion Times, All Exposures (Reference 2)

Nominal FWT EOOS Condition (all include SLO)

Core Power (% rated) 0 25 38.5

> 38.5 50 Base/TCV Stuck Closed/MSIVOOS 2.50 2.50 2.19 2.15 2.15 TBVOOS 3.39 3.39 2.58 2.15 2.15 TCV Slow Closure/

PLUOOS/PCOOS 2.50 2.50 2.26 2.26 2.15 FHOOS EOOS Condition (all include SLO)

Core Power (% rated) 0 25 38.5

> 38.5 50 Base/TCV Stuck Closed/MSIVOOS 2.69 2.69 2.29 2.15 2.15 TBVOOS 3.61 3.61 2.67 2.15 2.15 TCV Slow Closure/

PLUOOS/PCOOS 2.69 2.69 2.29 2.26 2.15

COLR Quad Cities 2 Revision 16 Page 19 of 32 Table 4-10: ATRIUM 10XM SLO MCPRp Limits for ISS Insertion Times, All Exposures (Reference 2)

Nominal FWT EOOS Condition (all include SLO)

Core Power (% rated) 0 25 38.5

> 38.5 50 Base/TCV Stuck Closed/MSIVOOS 2.50 2.50 2.19 2.15 2.15 TBVOOS 3.39 3.39 2.58 2.15 2.15 TCV Slow Closure/

PLUOOS/PCOOS 2.50 2.50 2.26 2.26 2.15 FHOOS EOOS Condition (all include SLO)

Core Power (% rated) 0 25 38.5

> 38.5 50 Base/TCV Stuck Closed/MSIVOOS 2.69 2.69 2.29 2.15 2.15 TBVOOS 3.61 3.61 2.67 2.15 2.15 TCV Slow Closure/

PLUOOS/PCOOS 2.69 2.69 2.29 2.26 2.15

COLR Quad Cities 2 Revision 16 Page 20 of 32 Table 4-11: ATRIUM 10XM SLO MCPRp Limits for TSSS Insertion Times, All Exposures (Reference 2)

Nominal FWT EOOS Condition (all include SLO)

Core Power (% rated) 0 25 38.5

> 38.5 50 Base/TCV Stuck Closed/MSIVOOS 2.50 2.50 2.19 2.15 2.15 TBVOOS 3.39 3.39 2.58 2.15 2.15 TCV Slow Closure/

PLUOOS/PCOOS 2.50 2.50 2.27 2.27 2.15 FHOOS EOOS Condition (all include SLO)

Core Power (% rated) 0 25 38.5

> 38.5 50 Base/TCV Stuck Closed/MSIVOOS 2.69 2.69 2.29 2.15 2.15 TBVOOS 3.61 3.61 2.67 2.15 2.15 TCV Slow Closure/

PLUOOS/PCOOS 2.69 2.69 2.29 2.27 2.15

COLR Quad Cities 2 Revision 16 Page 21 of 32 Table 4-12: ATRIUM 10XM MCPRf Limits (Reference 2)

EOOS Condition*

Core Flow (% rated)

MCPRf Limit Base Case / FHOOS / PCOOS /

PLUOOS / TCV Slow Closure /

PLUOOS and PCOOS in TLO and SLO / MANFRV1 / MANFRV2 0

1.66 35 1.66 108 1.17 Any Scenario** with One MSIVOOS 0

1.78 35 1.78 108 1.18 Any Scenario** with TBVOOS 0

1.87 35 1.87 108 1.33 Any Scenario** with 1 Stuck Closed TCV/TSV 0

1.66 35 1.66 108 1.17

  • See Section 8 for further operating restrictions.
    • Any Scenario includes any other combination of allowable EOOS conditions that is not otherwise covered by this table.

Note that the MCPRf limits for any scenario with 1 stuck closed TCV/TSV are identical to base case MCPRf limits. This is reflected in the thermal limit sets presented in Table 8-1.

COLR Quad Cities 2 Revision 16 Page 22 of 32

5. Linear Heat Generation Rate Technical Specification Sections 3.2.3, 3.4.1, and 3.7.7 The TMOL at rated conditions for the ATRIUM 10XM fuel is established in terms of the maximum LHGR as a function of peak pellet exposure. The LHGR limits for ATRIUM 10XM fuel are presented in Table 5-1.

The power-and flow-dependent LHGR multipliers (LHGRFACp and LHGRFACf) are applied directly to the LHGR limits to protect against fuel melting and overstraining of the cladding during an AOO (Reference 2). In all conditions, the margin to the LHGR limits is determined by applying the lowest multiplier from the applicable LHGRFACp and LHGRFACf multipliers for the power/flow statepoint of interest to the steady state LHGR limit (Reference 2).

LHGRFACp and LHGRFACf multipliers were established to support base case and EOOS conditions for all Cycle 27 exposures and scram speeds. The LHGRFACp multipliers for ATRIUM 10XM are presented in Table 5-2. The LHGRFACf multipliers for ATRIUM 10XM are presented in Table 5-3. The LHGRFACp and LHGRFACf multipliers are applicable in both TLO and SLO.

The EOOS conditions separated by / in these tables represent single EOOS conditions and not any combination of conditions.

Table 5-1: LHGR Limits for ATRIUM 10XM (Reference 2)

Peak Pellet Exposure (MWd/MTU)

LHGR Limit (kW/ft) 0 14.1 18,900 14.1 74,400 7.4

COLR Quad Cities 2 Revision 16 Page 23 of 32 Table 5-2: ATRIUM 10XM LHGRFACp Multipliers for All Scram Insertion Times, All Exposures (Reference 2)

Nominal FWT EOOS Condition Core Flow (%

rated)

Core Power (% rated) 0 25 38.5

> 38.5 50 80 100 Base/TCV Stuck Closed/MSIVOOS 60 0.50 0.50 0.56 0.64 0.66 0.88 1.00

> 60 0.48 0.48 0.56 TBVOOS 60 0.36 0.36 0.52 0.64 0.66 0.88 1.00

> 60 0.34 0.34 0.46 TCV Slow Closure/

PLUOOS/PCOOS 60 0.50 0.50 0.56 0.64 0.66 0.88 1.00

> 60 0.48 0.48 0.56 MANFRV1*

60 0.50 0.50 0.56 0.60 0.62 0.84 1.00

> 60 0.48 0.48 0.56 MANFRV2*

60 0.50 0.50 0.56 0.58 0.60 0.80 0.94

> 60 0.48 0.48 0.56 FHOOS EOOS Condition Core Flow (%

rated)

Core Power (% rated) 0 25 38.5

> 38.5 50 80 100 Base/TCV Stuck Closed/MSIVOOS 60 0.46 0.46 0.52 0.64 0.66 0.88 1.00

> 60 0.44 0.44 0.50 TBVOOS 60 0.34 0.34 0.48 0.64 0.66 0.88 1.00

> 60 0.32 0.32 0.44 TCV Slow Closure/

PLUOOS/PCOOS 60 0.46 0.46 0.52 0.64 0.66 0.88 1.00

> 60 0.44 0.44 0.50 MANFRV1*

60 0.46 0.46 0.52 0.60 0.62 0.84 1.00

> 60 0.44 0.44 0.50

  • EOOS conditions MANFRV1 and MANFRV2 are not applicable at power levels below Pbypass (38.5%.

COLR Quad Cities 2 Revision 16 Page 24 of 32 Table 5-3: ATRIUM 10XM LHGRFACf Multipliers for All Exposures, All EOOS (Reference 2)

Core Flow (% rated)

LHGRFACf 0.0 0.57 35.0 0.57 80.0 1.00 108.0 1.00

COLR Quad Cities 2 Revision 16 Page 25 of 32

6. Control Rod Block Setpoints Technical Specification Sections 3.3.2.1 and 3.4.1 The Rod Block Monitor Upscale Instrumentation Setpoints are determined from the relationships shown in Table 6-1.

Table 6-1: Rod Block Monitor Allowable Values (Reference 3)

ROD BLOCK MONITOR UPSCALE TRIP FUNCTION ALLOWABLE VALUE Two Recirculation Loop Operation 0.65 Wd + 56.1%

Single Recirculation Loop Operation 0.65 Wd + 51.4%

Wd - percent of recirculation loop drive flow required to produce a rated core flow of 98.0 Mlb/hr.

The setpoint may be lower/higher and will still comply with the CRWE analysis because CRWE is analyzed unblocked (Reference 2).

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7. Stability Protection Setpoints Technical Specifications Section 3.3.1.3 The OPRM PBDA Trip Settings are provided in Table 7-1.

Table 7-1: OPRM PBDA Trip Settings (Reference 2)

PBDA Trip Amplitude Setpoint (Sp)

Corresponding Maximum Confirmation Count Setpoint (Np) 1.10 13 The PBDA is the only OPRM setting credited in the safety analysis as documented in the licensing basis for the OPRM system (Methodology 2).

The OPRM PBDA trip settings are based, in part, on the cycle specific OLMCPR and the power/flow-dependent MCPR limits. Any change to the OLMCPR values and/or the power/flow-dependent MCPR limits should be evaluated for potential impact on the OPRM PBDA trip settings.

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

COLR Quad Cities 2 Revision 16 Page 27 of 32

8. Modes of Operation The allowed modes of operation with combinations of equipment out-of-service are as described in Table 8-1. The EOOS conditions separated by / in these tables represent single EOOS conditions and not combinations of conditions.

Note that the following EOOS options have operational restrictions: all SLO, all EOOS options with 1 TCV/TSV stuck closed, MSIVOOS, MANFRV1, and MANFRV2. See Table 8-2 for specific restrictions.

Table 8-1: Modes of Operation (Reference 2)

EOOS Option Thermal Limit Set Base Case BASE CASE TLO or SLO Nominal FWT or FHOOS TBVOOS due to Main Generator Load Reject Trip Relays OOS PLUOOS/TCV SLOW C TLO for Nominal FWT*

TBVOOS TBVOOS TLO or SLO Nominal FWT or FHOOS 1 TCV/TSV Stuck Closed BASE CASE TLO or SLO Nominal FWT or FHOOS One MSIVOOS MSIVOOS TLO or SLO Nominal FWT or FHOOS TCV Slow Closure PLUOOS/TCV SLOW C TLO or SLO Nominal FWT or FHOOS PLUOOS PLUOOS/TCV SLOW C TLO or SLO Nominal FWT or FHOOS PCOOS PLUOOS/TCV SLOW C TLO or SLO Nominal FWT or FHOOS PLUOOS and 1 TCV/TSV Stuck Closed PLUOOS/TCV SLOW C TLO for Nominal FWT or FHOOS SLO for Nominal FWT**

PCOOS and PLUOOS PLUOOS/TCV SLOW C TLO for Nominal FWT or FHOOS SLO for Nominal FWT**

PCOOS and 1 TCV/TSV Stuck Closed PLUOOS/TCV SLOW C TLO for Nominal FWT or FHOOS SLO for Nominal FWT**

MANFRV1 MANFRV1 TLO for Nominal FWT or FHOOS****

MANFRV2 MANFRV2 TLO for Nominal FWT***

MANFRV1 and 1 TCV/TSV Stuck Closed MANFRV1 TLO for Nominal FWT***,****

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  • SLO and FHOOS cannot be applied for the case of TBVOOS due to main generator load reject trip relays OOS.
    • FHOOS cannot be applied to SLO for the cases of PLUOOS and 1 TCV/TSV Stuck Closed, for the case of PCOOS and PLUOOS, or for the case of PCOOS and 1 TCV/TSV Stuck Closed.
        • MANFRV1 with FHOOS/1MSIVOOS/1 Stuck Closed TCV/TSV is only applicable for NSS.

Table 8-2: Core Operational Restrictions for EOOS Conditions (Reference 2)

EOOS Condition Core Flow (% of Rated)

Core Thermal Power (% of Rated Power)

Rod Line

(%)

1 TCV/TSV Stuck Closed PCOOS and 1 TCV/TSV Stuck Closed PLUOOS and 1 TCV/TSV Stuck Closed N/A

< 75

< 80 One MSIVOOS N/A

< 75 N/A SLO

< 51

< 50 N/A MANFRV1/MANFRV2 N/A

>38.5 (Pbypass)

N/A MANFRV1 w/ FHOOS*

N/A

>38.5 (Pbypass) and 70 N/A MANFRV1 and 1 MSIVOOS*

N/A

>38.5 (Pbypass) and 70 N/A MANFRV1 and 1 TCV/TSV Stuck Closed*

N/A

>38.5 (Pbypass) and 70

< 80 All requirements for all applicable conditions listed in Table 8-2 MUST be met.

  • Condition is only applicable for NSS.

COLR Quad Cities 2 Revision 16 Page 29 of 32 Common Notes:

1. All modes are allowed for operation at MELLLA, ICF (up to 108% rated core flow), and coastdown subject to the power restrictions in Table 8-2 (Reference 2). The licensing analysis supports full power operation to EOCLB (38,168 MWd/MTU CAVEX). Note that this value includes coastdown, where full power operation is not expected. Each OOS Option may be combined with each of the following conditions (Reference 2):
a. Up to 40% of the TIP channels OOS
b. Up to 50% of the LPRMs OOS
c. An LPRM calibration frequency of up to 2500 EFPH
2. Nominal FWT results are valid for application within a +10°F/-30ºF temperature band around the nominal FWT curve (Reference 2). For operation outside of nominal FWT, a FWT reduction of up to 120°F is supported for all FHOOS conditions listed in Table 8-1 for cycle operation through EOCLB (Reference 2). At lower power levels, the feedwater temperature reduction is less (Reference 2). Per Reference 6, there is a restriction which requires that for a FWT reduction greater than 100°F, operation needs to be restricted to less than the 100% load line. For a feedwater temperature reduction of between 30ºF and 120°F, the FHOOS limits should be applied.
3. The base case and EOOS limits and multipliers support operation with 8 of the 9 turbine bypass valves operational (i.e., one bypass valve out of service) with the exception of the TBVOOS condition in which all bypass valves are inoperable (Reference 2). Use of the response curve in TRM Appendix H supports operation with any single TBV OOS. TRM Appendix H facilitates analysis with one valve OOS in that the capacity at 0.45 seconds from start of TSV closure is equivalent to the total capacity with eight out of the nine valves in service (Reference 5). The analyses also support Turbine Bypass flow of 29.6% of vessel rated steam flow (Reference 5), equivalent to one TBV OOS (or partially closed TBVs equivalent to one closed TBV), if the assumed opening profile for the remaining TBVs is met. If the opening profile is NOT met, or if the TBV system CANNOT pass an equivalent of 29.6% of vessel rated steam flow, utilize the TBVOOS condition.
4. For the TBVOOS condition, analyses assume zero TBVs trip open and zero TBVs are available for pressure control during the slow portion of the transient analysis (Reference 5). Steam relief capacity is defined in Reference 5.
5. Failure of the main generator load reject trip relays to actuate (e.g., main generator load reject trip relays OOS) will render the turbine bypass valve system inoperable during load reject events (Reference 2). Operation with the main generator load reject trip relays out of service in TLO is supported by the TCV slow closure limits (Reference 2), meaning that, in accordance with Table 8-1, the PLUOOS/TCV SLOW C thermal limit set should be applied. This is applicable between 25% and 50% of rated thermal power.
6. Additional operating restrictions apply for both the MANFRV1 and MANFRV2 EOOS options as outlined in Reference 2. These operating restrictions apply when a Feedwater Regulating Valve is placed in manual for conditions as described in the terms and definitions. Only one Feedwater Regulating Valve can be placed in manual. The additional EOOS conditions that are supported with MANFRV1 and MANFRV2 consist of 1 SRVOOS, 40% of TIP channels OOS and 50% of the LPRMs out-of-service. Other conditions associated with base case conditions, such as the feedwater temperature band, the pressure band, single and three-element level control, dome and turbine pressure control, and operation with 1 TBV OOS, are supported as discussed in section 5.1 of Reference 2.

COLR Quad Cities 2 Revision 16 Page 30 of 32

9. 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. GE Topical Report NEDE-24011-P-A, Revision 14, General Electric Standard Application for Reactor Fuel (GESTAR), June 2000.
2. GE Topical Report NEDO-32465-A, Revision 0, Reactor Stability Detect and Suppress Solutions Licensing Basis Methodology for Reload Applications, August 1996.
3. Exxon Nuclear Company Report XN-NF-81-58(P)(A), Revision 2 and Supplements 1 and 2, RODEX2 Fuel Rod Thermal-Mechanical Response Evaluation Model, March 1984.
4. Advanced Nuclear Fuels Corporation Report ANF-89-98(P)(A), Revision 1 and Supplement 1, Generic Mechanical Design Criteria for BWR Fuel Designs, May 1995.
5. Siemens Power Corporation Report EMF-85-74(P), Revision 0 Supplement 1 (P)(A) and Supplement 2 (P)(A), RODEX2A (BWR) Fuel Rod Thermal-Mechanical Evaluation Model, February 1998.
6. AREVA NP Topical Report BAW-10247PA, Revision 0, Realistic Thermal-Mechanical Fuel Rod Methodology for Boiling Water Reactors, February 2008.
7. Exxon Nuclear Company Topical Report XN-NF-80-19(P)(A), Volume 1 Revision 0 and Supplements 1 and 2, Exxon Nuclear Methodology for Boiling Water Reactors - Neutronic Methods for Design and Analysis, March 1983.
8. Exxon Nuclear Company Topical Report XN-NF-80-19(P)(A), Volume 4 Revision 1, Exxon Nuclear Methodology for Boiling Water Reactors: Application of the ENC Methodology to BWR Reloads, June 1986.
9. Exxon Nuclear Company Topical Report XN-NF-80-19(P)(A), Volume 3 Revision 2, Exxon Nuclear Methodology for Boiling Water Reactors, THERMEX: Thermal Limits Methodology Summary Description, January 1987.
10. Siemens Power Corporation Topical Report EMF-2158(P)(A), Revision 0, Siemens Power Corporation Methodology for Boiling Water Reactors: Evaluation and Validation of CASMO-4/MICROBURN-B2, October 1999.
11. Siemens Power Corporation Report EMF-2245(P)(A), Revision 0, Application of Siemens Power Corporations Critical Power Correlations to Co-Resident Fuel, August 2000.
12. AREVA NP Report EMF-2209(P)(A), Revision 3, SPCB Critical Power Correlation, September 2009.
13. AREVA Topical Report ANP-10298P-A, Revision 1, ACE/ATRIUM 10XM Critical Power Correlation, March 2014.
14. AREVA NP Topical Report ANP-10307PA, Revision 0, AREVA MCPR Safety Limit Methodology for Boiling Water Reactors, June 2011.
15. Exxon Nuclear Company Report XN-NF-84-105(P)(A), Volume 1 Revision 0 and Volume 1 Supplements 1 and 2, XCOBRA-T: A Computer Code for BWR Transient Thermal-Hydraulic Core Analysis, February 1987.

COLR Quad Cities 2 Revision 16 Page 31 of 32

16. Advanced Nuclear Fuels Corporation Report ANF-913(P)(A), Volume 1 Revision 1 and Volume 1 Supplements 2, 3, and 4, COTRANSA2: A Computer Program for Boiling Water Reactor Transient Analyses, August 1990.
17. Framatome ANP Report EMF-2361(P)(A), Revision 0, EXEM BWR-2000 ECCS Evaluation Model, May 2001.
18. Siemens Power Corporation Report EMF-2292 (P)(A), Revision 0, ATRIUMTM-10: Appendix K Spray Heat Transfer Coefficients, September 2000.
19. Framatome ANP Topical Report ANF-1358(P)(A), Revision 3, The Loss of Feedwater Heating Transient in Boiling Water Reactors, September 2005.
20. Siemens Power Corporation Topical Report EMF-CC-074(P)(A), Volume 4 Revision 0, BWR Stability Analysis: Assessment of STAIF with Input from MICROBURN-B2, August 2000.

COLR Quad Cities 2 Revision 16 Page 32 of 32

10. References
1. Exelon Generation Company, LLC and MidAmerican Energy Company, Docket No. 50-265, Quad Cities Nuclear Power Station, Unit 2, Renewed Facility Operating License, No. DPR-30.
2. Framatome Report, ANP-3976P, Revision 0, Quad Cities Unit 2 Cycle 27 Reload Safety Analysis, January 21, 2022.
3. GE
Document, GE DRF C51-00217-01, Instrument Setpoint Calculation Nuclear Instrumentation, Rod Block Monitor, Commonwealth Edison Company, Quad Cities 1 & 2, December 14, 1999. (Attachment A to Exelon Design Analysis, QDC-0700-I-1419, Revision 0).
4. Exelon Technical Specifications for Quad Cities 1 and 2, Table 3.1.4-1, Control Rod Scram Times.
5. Exelon TODI, NF210388, Revision 0, Quad Cities Unit 2 Cycle 27 Plant Parameters Document, June 28, 2021.
6. Exelon Letter, NF-MW:02-0081, Approval of GE Evaluation of Dresden and Quad Cities Extended Final Feedwater Temperature Reduction, August 27, 2002.
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