Text

Core Operating Limits Report Cycle 20 Revision 2
	ML18297A313
Person / Time
Site:	River Bend
Issue date:	10/24/2018
From:	Schenk T; Entergy Operations
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	RBG-47911
	Download: ML18297A313 (51)
	v • d • e

,.

~*Entergx RBG-47911 October 24, 2018 Attn: Document Control Desk U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2738 Entergy Operations, Inc.

River Bend Station 5485 U.S Highway 61 N SI. FranCisville. LA 70775 Tel 225-381*4177 Timothy Schenk Manager - Regulatory Assurance

SUBJECT:

River Bend Station Core Operating Limits Report Cycle 20 Revision 2 River Bend Station - Unit 1 Docket No. 50-458 License No. NPF-47

Dear Sir or Madam:

Enclosed is Revision 2 of the River Bend Station (RBS) Core Operating Limits Report (COLR) for Cycle 20. This report is submitted in accordance with Technical Specification 5.6.5 of Appendix A of the Facility Operating License NPF-47.

There are no regulatory commitments contained in this document.

If you require additional information, please contact Mr. Tim Schenk at (225) 381-4177 or tschenk@entergy.com.

TAS/baj : River Bend Station Core Operating Limits Report Cycle 20 Revision 2

RBG-47911 Page 2 of 2 cc:

NRC Regional Administrator - Region IV NRC Project Manager - River Bend Station NRC Senior Resident Inspector - River Bend Station Louisiana Department of Environmental Quality Office of Environmental Compliance Radiological Emergency Planning and Response Section Public Utility Commission of Texas

RBG-47911 Page 1 of 49 River Bend Station Core Operating Limits Report Cycle 20 Revision 2

River Bend Station Core Operating Limits Report Cycle 20 Revision 2 Page 1 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 REVISION HISTORY Revision Revision Description 0

Original Issue - per Section 1.0 and Ref 3.1.5, Rev. 0 of the RBS C20 COLR is valid only for operation from BOC to MOC 1

Issued to reflect core configuration changes from PO-18-01. Added reference 3.1.6 to include Cycle 20 GESTAR Assessment of updated core loading.

Other editorial changes were made to correctly identify COLR figures in Sections 7.1 & 8.3 (CR-RBS-2017 -07694).

Previous Rev.O restriction continues to apply; this COLR is only valid for operation from BOC20B thru MOC.

2 Revision issued for RBS Cycle 20 TRACG AOO (Anticipated Operational Occurrences) implementation and is valid upon approval to the End of Cycle 20 (EOC20).

Added, or revised references and definitions applicable to RBS Cycle 20 TRACG AOO implementation, including the revised Cycle 20 GESTAR Assessment of updated core loading and the revised Cycle 20 Supplemental Reload Licensing Report.

Added reference applicable to Cycle 20 loaded GNF2 and GNF3 LUA fuel.

RBS Cycle 20 TRACG AOO analysis removed thermal limits difference between Cycle 20 fuel types GNF2 and GNF3 LUA. Both fuel types are bounded by the same thermal limits and MCPR and LHGR figures were appropriately revised. Figures containing duplicate information for different Application Conditions were consolidated and SLO limits were included on the figures.

Editorial changes to reflect clarification that SLO ECCS/LOCA multiplier of 0.83 is applied only to SLO LHGRFACF multipliers.

Table 7.0 and Figures 7.0.a and 7.0.b added. The table provides a summary of TLO and SLO reactor rated power Operating Limit MCPR and figures show TRACG AOO derived Cycle 20 MCPRp for reactor powers below Pbypass, and K(P) multipliers for powers above Pbypass.

Table of contents corrected the 8.3 title and expanded to include table and figure numbers.

Page 2 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 TABLE OF CONTENTS 1.0 PURPOSE...................................................................................................................... 5 2.0 SCOPE........................................................................................................................... 5

3.0 REFERENCES

............................................................................................................... 5 3.1 CURRENT CYCLE REFERENCES....................................................................................................................... 5 3.2 METHODOLOGY REFERENCES......................................................................................................................... 6 4.0 DEFINITIONS................................................................................................................. 6 5.0 CORE DESIGN............................................................................................................... 8 5.1 REFERENCE CORE LOADING PATTERN............................................................................................................. 8 5.2 CONTROL RODS.............................................................................................................................................. 8 6.0 AVERAGE PLANAR LINEAR HEAT GENERATION RATE (APLHGR)....................... 8 7.0 MINIMUM CRITICAL POWER RATIO (MCPR).............................................................. 8 7.1 FLOW-DEPENDENT MINIMUM CRITICAL POWER RATIO (MCPRF) VALUES:......................................................... 9 7.2 POWER-DEPENDENT MINIMUM CRITICAL POWER RATIO (MCPRp ) VALUES:...................................................... 9 8.0 LINEAR HEAT GENERATION RATE (LHGR)............................................................... 9 8.1 EXPOSURE-DEPENDENT LINEAR HEAT GENERATION RATE (LHGR) VALUES:.................................................. 10 8.2 FLOW-DEPENDENT LINEAR HEAT GENERATION RATE FACTORS (LHGRFACF) VALUES:.................................. 10 8.3 POWER-DEPENDENT LINEAR HEAT GENERATION RATE FACTORS (LHGRFACp) VALUES:................................ 10 9.0 STABILITY................................................................................................................... 10 9.1 STABILITY REGION BOUNDARIES AND SETPOINTS........................................................................................... 11 9.2 APRM FLOW BIASED SIMULATED THERMAL POWER-HIGH TIME CONSTANT (SR 3.3.1.1.14).......................... 12 LIST OF TABLES:

Table 7.0: OLMCPR Summary Table....................................................................................................................... 15 LIST OF FIGURES:

Figure 6.1-1 a: GNF2 MAPLHGR.............................................................................................................................. 13 Figure 6.1-1 b: GNF3 MAPLHGR.............................................................................................................................. 14 Figure 7.0.a: C20 MCPRp limit and K(P) multiplier for Application Conditions 1, 2, 4, and 5.................................. 16 Figure 7.0.b: C20 MCPRp limit and K(P) multiplier for Application Conditions 3, 6, and 7...................................... 17 Figure 7.1-1: BOC-EOC MCPRF limit, TLO and SLO for Application Condition 1, 2, 3........................................... 18 Figure 7.1-2: BOC-EOC MCPRF limit, TLO and SLO for Application Condition 4, 5, 6, 7....................................... 19 Figure 7.2-1a: BOC-MOC MCPRp limit, TLO and SLO for Application Condition 1, 4............................................ 20 Figure 7.2-1 b: MOC-EOC MCPRp limit, TLO and SLO for Application Condition 1, 4............................................ 20 Figure 7.2-2a: BOC-MOC MCPRp limit, TLO and SLO for Application Condition 2................................................. 22 Figure 7.2-2b: MOC-EOC MCPRp limit, TLO and SLO for Application Condition 2................................................. 23 Figure 7.2-3a: BOC-MOC MCPRp limit, TLO and SLO for Application Condition 3, 6............................................ 24 Figure 7.2-3b: MOC-EOC MCPRp limit, TLO and SLO for Application Condition 3, 6............................................ 25 Page 3 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 7.2-4a: BOC-MOC MCPRp limit, TLO and SLO for Application Condition 5................................................. 26 Figure 7.2-4b: MOC-EOC MCPRp limit, TLO and SLO for Application Condition 5................................................. 27 Figure 7.2-5a: BOC-MOC MCPRp limit, TLO and SLO for Application Condition 7................................................. 28 Figure 7.2-5b: MOC-EOC MCPRp limit, TLO and SLO for Application Condition 7................................................. 29 Figure 8.2-1 a: BOC-EOC TLO LHGRFACF Multiplier for Application Conditions 1-7.............................................. 30 Figure 8.2-1 b: BOC-EOC SLO LHGRFACF Multiplier for Application Conditions 1-7.............................................. 31 Figure 8.3-1 : BOC-EOC TLO and SLO LHGRFAC p Multiplier for Application Condition 1..................................... 32 Figure 8.3-2: BOC-EOC TLO and SLO LHGRFACp Multiplier for Application Condition 2..................................... 33 Figure 8.3-3: BOC-EOC TLO and SLO LHGRFACp Multiplier for Application Condition 3..................................... 34 Figure 8.3-4: BOC-EOC TLO and SLO LHGRFAC p Multiplier for Application Condition 4..................................... 35 Figure 8.3-5: BOC-EOC TLO and SLO LHGRFACp Multiplier for Application Condition 5..................................... 36 Figure 8.3-6: BOC-EOC TLO and SLO LHGRFAC p Multiplier for Application Condition 6..................................... 37 Figure 8.3-7: BOC-EOC TLO and SLO LHGRFACp Multiplier for Application Condition 7..................................... 38 Figure 9.1-1 : Monitored Region Boundary (Case 1)................................................................................................ 39 Figure 9.1-2: Monitored Region Boundary (Case 2)................................................................................................40 Figure 9.1-3: APRM for High Scram and Restricted Region Boundary (TLO Case 1)............................................ 41 Figure 9.1-4: APRM for High Scram and Restricted Region Boundary (TLO Case 2)............................................ 42 Figure 9.1-5: APRM for High Scram and Restricted Region Boundary (SLO Case 1)............................................ 43 Figure 9.1-6: APRM for High Scram and Restricted Region Boundary (SLO Case 2)............................................ 44 Figure 9.1-7: APRM for High Rod-Block Setpoints (TLO Case 1)........................................................................... 45 Figure 9.1-8: APRM for High Rod-Block Setpoints (TLO Case 2)........................................................................... 46 Figure 9.1-9: APRM for High Rod-Block Setpoints (SLO Case 1)........................................................................... 47 Figure 9.1-10: APRM for High Rod-Block Setpoints (SLO Case 2)......................................................................... 48 Page 4 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 1.0 PURPOSE The COLR is controlled as a License Basis Document and revised accordingly for each fuel cycle or remaining portion of a fuel cycle. With RBS Cycle 20 TRACG AOO implementation (References 3.1.1 and 3.1.7), Ref 3.1.5 restriction for operation from BOC to MOC is no longer required, and the COLR is applicable to Cycle 20 operation until EOC. Any revisions to the COLR must be submitted to the NRC for information as required by Tech Spec 5.6.5 and tracked by RBS License Commitment L 11358.

2.0 SCOPE As defined in Technical Specification 1.1, the COLR is the document that provides the core operating limits for the current fuel cycle. This document is prepared in accordance with Technical Specification 5.6.5 for each reload cycle using NRC-approved analytical methods.

The limits included in this report are:

1) LCO 3.2.1, Average Planar Linear Heat Generation Rate (APLHGR)

2)

LCO 3.2.2, Minimum Critical Power Ratio (MCPR), including power and flow dependent limits

3)

LCO 3.2.3, Linear Heat Generation Rate (LHGR), including power and flow dependent limits

4)

LCO 3.2.4, Fraction of Core Boiling Boundary (FCBB)

5)

LCO 3.3.1.1, RPS Instrumentation (RPS), Function 2.b

6)

LCO 3.3.1.3, Periodic Based Detection System (PBDS)

3.0 REFERENCES

This section contains the background, cycle-specific, and methodology references used in the current cycle reload analysis.

3.1 Current Cycle References 3.1.1 ECH-NE-16-00037 Rev. 1, Supplemental Reload Licensing Report for RBS - Unit 1 Reload 19 Cycle 20, TRACG04 AOO Implementation; GNF 004N9245 Rev.1, Aug. 2018.

3.1.2 ECH-NE-16-00038 Rev. 0, Fuel Bundle Information Report for River Bend Station - Unit 1 Reload 19 Cycle 20; GNF 003N9292 Rev.O, Nov. 2016.

3.1.3 Letter, R. E. Kingston to G. W. Scronce, "Time Constant Values for Simulated Thermal Power Monitor", RBC-46410, November 30, 1995.

3.1.4 RBS Updated Safety Analysis Report 3.1.5 CR-RBS-2016-06418 3.1.6 ECH-NE-17-00032 Rev. 1, RBS C20 ULP-GESTAR Assessment; GNF 004N9396 Rev.1, Aug.

2018.

3.1.7 ECH-NE-18-00033 Rev. 0, Entergy Operations, Inc. River Bend Station TRACG Implementation for Reload Licensing Transient Analysis (T1309); GEH 003N9955-RO, July 2018.

Page 5 of 48 COLR Rev. 20-2 T_

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River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 3.2 Methodology References The following are applicable to GNF supplied fuel.

3.2.1 NEDE-24011-P-A-23-US, September 2016, General Electric Standard Application for Reactor Fuel (GESTAR-II).

3.2.2 GNF2 Advantage Generic Compliance with NEDE-24011-P-A (GESTAR II), NEDC-33270P, Revision 7, October 2016, MFN 16-073, October 12, 2016.

3.2.3 Technical Evaluation to Support Introduction of GNF3 Lead Use Assemblies (LUAs) in River Bend Station, Unit 1, 002N3424.1, Revision 0, December 2014.

4.0 DEFINITIONS 4.1 Average Planar Linear Heat Generation Rate (APLHGR) - the APLHGR shall be applicable to a specific planar height and is equal to the sum of the linear heat generation rates for all the fuel rods in the specified bundle at the specified height divided by the number of fuel rods in the fuel bundle.

4.2 Average Planar Exposure - the Average Planar Exposure shall be applicable to a specific planar height and is equal to the sum of the exposure of all the fuel rods in the specified bundle at the specified height divided by the number of fuel rods in the fuel bundle.

4.3 Critical Power Ratio (CPR) - the ratio of that power in the assembly, which is calculated by application of the fuel vendor's appropriate boiling correlation, to cause some point in the assembly to experience boiling transition, divided by the actual assembly operating power.

4.4 Core Operating Limits Report (COLR) - The River Bend Station specific document that provides core operating limits for the current reload cycle in accordance with Technical Specification 5.6.5.

4.5 Linear Heat Generation Rate (LHGR) - the LHGR shall be the heat generation per unit length of fuel rod. It is the integral of the heat flux over the heat transfer area associated with the unit length.

4.6 Minimum Critical Power Ratio (MCPR) - the MCPR shall be the smallest CPR which exists in the core.

4.7 MCPR Safety Limit - the minimum value of the CPR that ensures that 99.9% of the fuel rods avoid boiling transition during any moderate frequency transient.

4.8 Aligned Drive Flow - Adjusted FCTR card input drive flow signal that accounts for actual variations in the core flow to drive flow relationship.

4.9 Monitored Region - The area of the core power and flow operating domain where the reactor may be susceptible to reactor instabilities under conditions exceeding the licensing basis of the current reactor system.

4.10 Restricted Region - The area of the core power and flow operating domain where the reactor is susceptible to reactor instabilities in the absence of restrictions on core void distributions.

4.11 Setpoint "Setup" - A FCTR card feature that sets the normal "non-setup" E1A APRM flow-biased scram and control rod block trip reference setpoints associated with the Exclusion and Restricted Regions higher to permit required reactor maneuvering in the Restricted Region when stability controls are in effect.

Page 6 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 4.12 End of Rated (EOR) - the cycle exposure corresponding to all rods out, 100% power/100% flow, and normal feedwater temperature. (corresponding to Core Average Exposure 35,534 MWd/MTU, or 32,236 MWd/ST) [Reference 3.1.1. Section 3].

4.13 MOC - Middle of Cycle (EOR - 2,343 MWd/MTU, or 2,125 MWd/ST) [Reference 3.1.1, Table 7-1].

4.14 EOC - End of Cycle 4.15 FFWTR - Final Feedwater Temperature Reduction.

4.16 FHOOS - Feedwater Heater Out of Service.

4.17 PROOS - Pressure Regulator Out of Service.

4.18 SLO - Single Loop Operation.

4.19 TBOOS - Turbine Bypass Out of Service 4.20 AREVA - AREVA NP Inc.

4.21 GNF - Global Nuclear Fuel 4.22 EOC-RPT - End of Cycle Recirculation Pump Trip 4.23 Reference Core Loading Pattern - The Core Loading Pattern Used for Reload Licensing Analysis.

4.24 Application Condition - The combination of equipment out of service conditions for which LHGRFAC and MCPR limits are determined [Reference 3.1.1, Section 11]. The Application Conditions are as follows:

Application FWHOOS /

EOC-RPT PROOS TBOOS Condition FFWTR OOS 1

X 2

X X

3 X

X 4

X X

5 X

X X

6 X

X X

7 X

X X

X All application conditions address the licensed core flow.

4.25 Pbypass - Reactor Thermal Power (RTP) level below which the Turbine Stop Valve position and the Turbine Control Valve fast closure scrams are bypassed. Per TS Table 3.3.1.1-1, Pbypass RTP =

40% RTP.

4.26 Operating Limit MCPR (OLMCPR) - Limiting transients are analyzed either with TRACG or other NRC-approved methodologies. The types of transients evaluated are loss of flow, increase in pressure and power, positive reactivity insertion, and coolant temperature increase. The TRACG methodology calculates an operating limit MCPR (OLMCPR) for the transient initial condition that will result in no more than 0.1 % of the fuel rods susceptible to boiling transition. The other methodologies calculate a reduction in CPR for each transient, with the largest change in CPR (delta-CPR) resulting from the limiting transient. When the largest delta-CPR is added to the MCPR SL, an OLMCPR is obtained. The OLMCPR, calculated by either the TRACG or other methodology, sets the core operating limits.

Page 7 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 5.0 CORE DESIGN 5.1 Reference Core Loading Pattern The original Reference Core Loading pattern is presented in Reference 3.1.1.

5.2 Control Rods The River Bend core utilizes the GE design control rods, non GE design CR-82M and CR-82M-1 bottom entry cruciform control rods. These control rod designs are discussed in more detail in Reference 3.1.4, Sections 4.1 and 4.2.

6.0 AVERAGE PLANAR LINEAR HEAT GENERATION RATE (APLHGR)

Per Technical Specification 3.2.1, all APLHGR values shall not exceed the exposure-dependent limits reported as follows:

Fuel Type Figure GNF2 6.1-1 a GNF3 6.1-1b For single loop operation (SLO), ECCS/LOCA multiplier of 0.83 [Reference 3.1.1, Table 16.3-2] is applied to the APLHGR limits for all fuel types.

7.0 MINIMUM CRITICAL POWER RATIO (MCPR)

Per Technical Specification 3.2.2, the MCPR values shall be equal to or greater than the operating limit for operation at ~ 23.8% of rated thermal power. The operating limit is the maximum of the flow-dependent minimum critical power ratio (MCPRF) and the power-dependent minimum critical power ratio (MCPRp).

For power level less than Pbypass, the MCPRp can be directly read from Figure 7.0.a for AOO application conditions when Pressure Regulator is operable or from Figure7.0.b, when Pressure Regulator is out of service.

Above Pbypass, the MCPRp is the product of the rated power and flow MCPR application condition operating limit presented in Table 7.0 [Ref. 3.1.1, Section 11, Limiting Pressurization Events OLMCPR Summary Table], and the K(P) factor presented in Figure 7.0.a for AOO application conditions when Pressure Regulator is operable, or from Figure 7.0.b, when Pressure Regulator is out of service.

MCPRF and MCPRp. including the calculated MCPRp limits for thermal powers above Pbypass, are provided in Sections 7.1 and 7.2 below. These limits address the Cycle 20 cycle exposure ranges, two loop (TLO) and single loop operation (SLO), and seven application conditions. There is no MCPR distinction between GNF2 and GNF3 LUA fuel types.

During SLO, the Operating Limit MCPR shall be increased to account for the Pump Seizure limit and the higher SLMCPR in SLO. Rated Power Equivalent SLO Pump Seizure event OLMCPR is limiting at 1.44 for BOC-EOC operation. For SLO, the MCPRF and MCPRp below Pbypass operating limits are 0.03 greater than the two loop value [Reference 3.1.1, Section 11]. For calculated MCPRp limits for thermal powers above Pbypass, use SLO figures provided for Section 7.2 below.

Page 8 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 7.1 Flow-Dependent Minimum Critical Power Ratio (MCPRF) Values:

The MCPRF curves from Reference 3.1.1, Appendix D, applicable to all Cycle 20 exposures for TLO and SLO limits are found in the following figures:

Figures Application Condition TLO and SLO GNF2 and GNF3 LUA 1, 2, 3 7.1-1 4, 5, 6, 7 7.1-2 7.2 Power-Dependent Minimum Critical Power Ratio (MCPRp) Values:

The TLO and SLO MCPRp curves include the Reference 3.1.1, Appendix D reported MCPRp for thermal powers no larger than Pbypass, and the calculated MCPRp limits for thermal powers above Pbypass. They are found in the following figures:

Figure Application Condition BOC-MOC MOC-EOC GNF2 and GNF3 LUA GNF2 and GNF3 LUA 1, 4 7.2-1a 7.2-1b 2

7.2-2a 7.2-2b 3, 6 7.2-3a 7.2-3b 5

7.2-4a 7.2-4b 7

7.2-5a 7.2-5b More limiting values of the power dependent limits may be used in lieu of those indicated by a particular operating mode. For example EOC values may be used instead of the MOC values.

8.0 LINEAR HEAT GENERATION RATE (LHGR)

Per Technical Specification 3.2.3, the LHGR values for any rod at any axial location shall not exceed the exposure-dependent limits multiplied by the smaller of either the power-dependent or flow-dependent LHGR factors.

For single loop operation (SLO), ECCS/LOCA multiplier of 0.83 [Reference 3.1.1, Table 16.3-2] is applied to the LHGRF limits for all fuel types.

For two recirculation loop and single recirculation loop operation the LHGR multiplier is as follows:

For two recirculation loop operation:

LHGRFAC = MIN (LHGRFACp, LHGRFACF)

For single loop operation:

LHGRFAC = MIN (LHGRFACp, LHGRFACF(sLo))

Page 9 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 8.1 Exposure-Dependent Linear Heat Generation Rate (LHGR) Values:

GNF2 and GNF3 exposure-dependent LHGR values are considered GNF proprietary and will not be contained in the COLR. The GNF2 LHGR values may be found in Reference 3.1.2, Section 1. Per Reference 3.1.1, Appendix D the GNF2 exposure dependent LHGR values may be applied to the GNF3 fuel.

8.2 Flow-Dependent Linear Heat Generation Rate Factors (LHGRFACF) Values:

The LHGRFACF curves are from Reference 3.1.1, Appendix D and are found on Figure 8.2-1a for TLO, and on Figure 8.2-1b for SLO. Figures 8.2-1a and Figure 8.2-1b are valid for all Cycle 20 fuel types in BOC to EOC exposure range.

8.3 Power-Dependent Linear Heat Generation Rate Factors (LHGRFACp) Values:

The LHGRFACp curves are from Reference 3.1.1, Appendix D and are found in the following figures:

Figure Application Conditions Applicable to BOC - EOC for all types of fuel (GNF2 and GNF3 LUA) and during TLO, or SLO conditions 1

8.3-1 2

8.3-2 3

8.3-3 4

8.3-4 5

8.3-5 6

8.3-6 7

8.3-7 More limiting values of the power dependent multipliers may be used in lieu of those indicated by a particular operating mode. For example EOC values may be used instead of the MOC values.

9.0 STABILITY The following Technical Specifications / Technical Requirements contain stability related requirements:

TS 3.2.4, Fraction of Core Boiling Boundary (FCBB)

TS 3.3.1.1, RPS Instrumentation (RPS)

TS 3.3.1.3, Periodic Based Detection System (PBDS)

TR 3.3.1.1, RPS Instrumentation (RPS)

TR 3.3.2.1, Control Rod Block Instrumentation Page 10 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 9.1 Stability Region Boundaries and Setpoints This section contains region boundaries, setpoints and other stability related requirements. The stability region boundaries and setpoints are as follows Description Figure Monitored Region Boundary (Case 1) 9.1-1 Monitored Region Boundary (Case 2) 9.1-2 APRM Flow Biased Simulated Thermal Power - High Scram Setpoints and Restricted 9.1-3 Region Boundary (Two Recirculation Loop Operation - Case 1)

APRM Flow Biased Simulated Thermal Power - High Scram Setpoints and Restricted 9.1-4 Region Boundary (Two Recirculation Loop Operation - Case 2)

APRM Flow Biased Simulated Thermal Power - High Scram Setpoints and Restricted 9.1-5 Region Boundary (Single Recirculation Loop Operation -

Case 1)

APRM Flow Biased Simulated Thermal Power - High Scram Setpoints and Restricted 9.1-6 Region Boundary (Single Recirculation Loop Operation -

Case 2)

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Two Recirculation Loop 9.1-7 Operation -

Case 1)

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Two Recirculation Loop 9.1-8 Operation - Case 2)

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Single Recirculation 9.1-9 Loop Operation -

Case 1)

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Single Recirculation 9.1-10 Loop Operation -

Case 2)

Note:

For Figures 9.1-3 to 9.1-10, the Nominal Setpoints should be used for indicating the entry into a particular stability region as allowed and appropriate actions be taken prior to the entry In the table above, two distinct operating states (Case 1 and Case 2) are considered. These are described as follows:

Case 1 - Normal Feedwater Heating Operation or Low Reactor Power:

TFw (at rated) ~ Tf0SIGN (at rated) - 50° F, and rated equivalent at off-rated reactor conditions OR P ~ 30%

Case 2 - Reduced Feedwater Heating Operation:

TFw {at rated) < Tf0 SIGN {at rated) - 50° F AND P > 30%

The APRM Flow Biased Simulated Thermal Power - High scram setpoint and Restricted Region Boundary, and APRM Flow Biased Neutron Flux - High Rod-Block Setpoints are given in terms of aligned drive flow. The aligned drive flow is calculated from the input drive flow using the following relationship:

Page 11 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 101.209 X

~40 31.028 x

70.181

(~100 _ ~40 )

100

+

70.181 x

W5 Where:

W5

=

FCTR card input drive flow in percent rated, Wo

=

Aligned drive flow in percent rated,

~40

=

Low flow drive flow alignment setting, and 100

=

High flow drive flow alignment setting.

9.2 APRM Flow Biased Simulated Thermal Power-High Time Constant (SR 3.3.1.1.14)

The simulated thermal power time constant is 6 +/- 0.6 seconds (Reference 3.1.3). Thus the maximum simulated thermal power time constant for use in meeting the surveillance requirement is 6.6 seconds.

Page 12 of 48 COLR Rev. 20-2

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River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 6.1-1a.

MAXIMUM AVERAGE PLANAR LINEAR HEAT GENERATION RATE (MAPLHGR) VERSUS AVERAGE PLANAR EXPOSURE FUEL TYPE:

GNF2 15 14 13 12 11 10

~ 9

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o 20 40 60 Average Planar Exposure (GWD/MTU)

Average Planar MAPLHGR Limit Exposure (GWd/Mn (kWIft) 0.00 13.78 19.31 13.78 67.00 7.50 70.00 6.69 80 Page 13 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 6.1-1b.

MAXIMUM AVERAGE PLANAR LINEAR HEAT GENERATION RATE (MAPLHGR) VERSUS AVERAGE PLANAR EXPOSURE FUEL TYPE:

GNF3 15 14 13 12 11 10

~

~ 9

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0::

8 C) 7 J:

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a.

6 5

4 3

2 1

0 Average Planar Exposure (GWD/MTU)

Average Planar MAPLHGR Limit Exposure (GWd/MT)

(kW/ft) 0.00 13.78 19.31 13.78

67. 00 7.50 70.00 6.69 Page 14 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Table 7.0: OLMCPR Summary Table Application Operating Limit MCPR (OLMCPR) for 100% RTP for all GNF2 and Condition GNF3 LUA fuel types, TLO BOC-MOC MOC-EOC 1

1.29 1.33 2

1.31 1.38 3

1.31 1.36 4

1.29 1.33 5

1.31 1.39 6

1.31 1.36 7

1.31 1.39 Page 15 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 7.0.a - C20 MCPRp limit and K(P) multiplier for Application Conditions 1, 2, 4, and 5 2.0 ~~------~-------------------------------------,

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1.1 Operating Limit MCPR (P) = K(P)

Operating Limit MCPR(100)

For P<23.8%: No Thermal Limits Monitoring Required, No limits specified.

For 23.8%:5P:5P(Bypass), P(Bypass)=40%

OLMCPR(P)=1.64 +0.0074*(40%-P), Flow<50%

OLMCPR(P)=1.77 +0.0117*(40%-P), Flow~50%

For P>P(Bypass)

K(P)=1.178+0.00300*(40%-P), 40%< P :5 50%

K(P)=1.113+0.00325*(70%-P) I 50%< P :5 70%

K(P)=1.041 +0.00320*(85%-P), 70%< P :5 85%

K(P)=1.00+0.00273*(100%-P), 85%< P :5100%

+

t

+

1.0 +-~~-----T----~----~--~-----'----'---~~--~

20 30 40 50 60 70 so 90 100 110 Power (% rated)

Page 16 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2

!/)

ra

0.

.c Q..

v Q.....

0 --

Q..

a::

Q..

0 :!

...J 0

-:i.

0 0 V 1\\

Q.....

0 -

ii:'

~

I....

~

0.

E a::

Q..

0 :!

"C Q)...

ra a::

2.0 1.9 1.S 1.7 1.6 1.5 1.4 1.3 1.2 1.1 Figure 7.0.b - C20 MCPRp limit and K(P) multiplier for Application Conditions 3, 6, and 7 Operating Limit MCPR (P) = K(P)

Operating Limit MCPR(100)

For P<23.8%: No Thermal Limits Monitoring Required, No limits specified.

For 23.8%~P~P(8ypass), P(8ypass)=40%

OLMCPR(P)=1.64 +0.0074*(40%-P), Flow<50%

OLMCPR(P)=1.77 +0.0117*(40%-P), Flow~50%

For P>P(8ypass)

K(P)=1.270+0.00520*(40%-P), 40%< P ~ 50%

K(P)=1.201 +0.00345*(70%-P), 50%< P ~ 70%

K(P)=1.153+0.00320*(85%-P), 70%< P ~ 85%

K(P)=1.00+0.00367*(100%-P), 85%< P ~100%

1.0 +-...!..------r-----1----,----,-----r---,-----,--~~-----1 20 30 40 50 60 70 so 90 100 110 Power (% rated)

Page 17 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.1-1 OPERATING LIMIT MCPR VERSUS CORE FLOW (MCPRF),

TLO AND SLO APPLICATION CONDITION:

1, 2, 3 FUEL TYPE:

GNF2 & GNF3 LUA 1.5 -

---f-

- -I' 1-1.4

- f-Loor Auto SL D roo-- I"',

~uto HC Loop

~

1-

-Heop-~afu.al r'I roo--

1.3 I"',

~

-L~or M anual ~LO

- --1--- r- -

~

u.

a::

Q.

u

~

1.2 1.1 1.0

~

1-

~ 1-

- t-1-

~

f'.........

1---

--- I-1----

~

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 Flow (% Rated)

Flow Loop Manual Loop Auto Loop Manual Loop Auto

(% Rated)

TLO TLO SLO SLO 20.0 1.26 1.34 1.29 1.37 30.0 1.26 1.34 1.29 1.37 50.0 1.20 1.27 1.23 1.30 72.0 1.20 1.20 1.23 1.23 100.0 1.20 1.20 1.23 1.23 109.5 1.20 1.20 1.23 1.23 Page 18 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.1-2 OPERATING LIMIT MCPR VERSUS CORE FLOW (MCPRF),

TLO AND SLO 1.6 1.5 1.4 ex: lJ 1.3

~

1.2 1.1 1.0 APPLICATION CONDITION:

4, 5, 6, 7 FUEL TYPE:

GNF2 & GNF3 LUA

--f--" -

-- f-----

-too~ Auto 5 0

- -- - -,-- ---- I'"--- -

Loa Auto LO 1-

~

LOaf Manus ISLO

~--....

i'-..

Loop iManua ILO

"" ~

1"-....

~ --

~

1-1-

-~

r--

~

r--.

_o-f'..::::: ~ ~

---. ~

-- --1-- -- --

,- -- t-

1-- ---- '--- t---- -- --

-- I-I-

f -

--1--

~

-~

0.0 10.0 20.0 30.0 40.0 SO.O 60.0 70.0 80.0 90.0 100.0 110.0 Flow (% Rated)

Flow Loop Manual Loop Auto Loop Manual Loop Auto

(% Rated)

TLO TLO SLO SLO 20.0 1.38 1.47 1.41 1.50 30.0 1.38 1.47 1.41 1.50 50.0 1.35 1.42 1.38 1.45 72.0 1.33 1.36 1.36 1.39 100.0 1.29 1.29 1.32 1.32 109.5 1.27 1.27 1.30 1.30 Page 19 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-1a Q,

a:

D..

2.2 2.0 1.8

~ 1.6 1.4 1.2 1.0 1- -

1- -

OPERATING LIMIT MCPR VERSUS CORE POWER (MCPR p),

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

- ~

~,

~

"' ~.,

5-=.-..............

~ -....

1, 4 BOC-MOC GNF2 & GNF3 LUA

~-

t-............

~".......

1'-...

I'--..

---.... r--.-r----

o 10 20 30 40 50 60 70 80 90 100 Power (% Rated)

-- >5rn6 Flow, TLO

5 50.0% Flow, TLO

- - - - >5rn6 Flow, SLO

- - - -:5 50.0% Flow, SLO Power

s; 50.0%

>50%

Power

s; 50.0%

>50%

(% Rated)

Flow, SLO Flow, SLO

(% Rated)

Flow, TLO Flow, TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.74 40.0 1.56 50.0 1.70 50.0 1.52 70.0 1.60 70.0 1.44 70.0 1.57 70.0 1.40 85.0 1.50 85.0 1.34 85.0 1.50 85.0 1.34 100.0 1.44 100.0 1.29 FIGURE 7.2-1b OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp),

Page 20 of 48 COLR Rev. 20-2 110

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-1b 2.2 2.0 1.8 Q.

g:

1.6 u

~

1.4 1.2 1.0 o

10 OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp).

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

~

~,

~

1'......

-~

~

1.4 MOC-EOC GNF2 & GNF3 LUA 1-.....

~

~""-o;:......

r-.............

r----.

20 30 40 50 60 70 80 90 100 Power (% Rated)

>50% Flow, TLO

~ 50.0% Flow, TLO

- - - - >50% Flow, SLO

~ 50.0% Flow, SLO Power

~ 50.0%

>50% Flow, Power

~ 50.0%

>50% Flow,

(% Rated)

Flow. SLO sL'o

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.74 40.0 1.61 50.0 1.70 50.0 1.57 70.0 1.60 70.0 1.48 70.0 1.57 70.0 1.45 85.0 1.50 85.0 1.38 85.0 1.50 85.0 1.38 100.0 1.44 100.0 1.33 Page 21 of 48 COLR Rev. 20-2 110

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-2a.

OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp ) for TLO and SLO APPLICATION CONDITION:

2 EXPOSURE RANGE:

BOC TO MOC FUEL TYPE:

GNF2 & GNF3 LUA 2.2 Q.

a:

2.0 1.8 lJ 1.6

2 1.4 1.2 1.0 r-o 10 20

~~

~,

~ ""

~

f-----

... ~

1-...

~

-r-----..

r----..

30 40 50 60 70 80 90 100 110 Power (% Rated)

>50% Flow, TLO - ~ 50.0% Flow, TLO

--- >50% Flow, SLO

~ 50.0% Flow, SLO Power

5 50.0%

>50% Flow, Power

5 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.74 40.0 1.58 50.0 1.70 50.0 1.54 70.0 1.60 70.0 1.46 70.0 1.57 70.0 1.43 85.0 1.50 85.0 1.36 85.0 1.50 85.0 1.36 100.0 1.44 100.0 1.31 Page 22 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 702-2bo OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp ) for TLO and SLO APPLICATION CONDITION:

2 EXPOSURE RANGE:

MOC TO EOC FUEL TYPE:

GNF2 & GNF3 LUA 2.2

-_o-f---

2.0 I- --

~

~,

~ "'

~,

1'-......

f--

~

Ioi; ;:--

~

1'-......

r---

1.8

--~

0-1--

1-- -- ['............

~

1.4 1--

o-f--

1.2 f--- t------ --

I -

r 1.0 o

10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

>50% Flow, TLO

$ 50.0% Flow, TLO

--- >50% Flow, SLO --- $ 50.0% Flow, SLO Power

$ 50.0%

>50% Flow, Power s; 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.74 40.0 1.67 50.0 1.70 50.0 1.63 70.0 1.60 70.0 1.54 70.0 1.57 70.0 1.50 85.0 1.50 85.0 1.44 85.0 1.50 85.0 1.44 100.0 1.44 100.0 1.38 Page 23 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-3a 2.2 2.0 1.8 Q.

g:

1.6 u

~

1.4 1.2

~- - ---

1.0 o

10 20 OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp),

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

,,~

I~

~, " "

~" '"

~

............. ~

i"oo..

- 30 40 50 60 Power (% Rated) 3, 6 BOC-MOC GNF2 & GNF3 LUA

............. - -- 1'-...

I

--...... ~

I r---. I 1---

............ ~

-- - --- t---

70 80 90 100

-- >500(, Flow, TLO -- s 50.0% Flow, TLO

>500(, Flow, SLO s 50.0% Flow, SLO Power s 50.0%

>50% Flow, Power s 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.90 40.0 1.73 50.0 1.83 50.0 1.66 70.0 1.73 70.0 1.57 70.0 1.73 70.0 1.57 85.0 1.66 85.0 1.51 85.0 1.52 85.0 1.38 100.0 1.44 100.0 1.31 Page 24 of 48 COLR Rev. 20-2 110

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-3b 2.2 2.0 1.8 I--

Q.

a: e 1.6

~

1.4 1.2 i-1.0 o

OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp ),

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

~

~,

~

...... ~

~

3, 6 MOC-EOC GNF2 & GNF3 LUA I-... ~

~

... 1-.....

t-......

I I

I""-!

I--

~

~ -

1--

---I -

1-

--I -

I-

~

10 20 30 40 50 60 70 80 90 100 Power (% Rated)

-- >50% Flow, TlO -- 5; 50.0% Flow, TLO

- - - - >50% Flow, SLO

- - - - 5; 50.0% Flow, SLO Power 5; 50.0%

>50% Flow, Power

5 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.90 40.0 1.80 50.0 1.83 50.0 1.73 70.0 1.73 70.0 1.63 70.0 1.73 70.0 1.63 85.0 1.66 85.0 1.57 85.0 1.52 85.0 1.43 100.0 1.44 100.0 1.36 Page 25 of 48 COLR Rev. 20-2 110

\\

~."

~

t.\\

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-4a 2.2 f--

2_0 1.8 I-

11.

a: 5 1.6

~

OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp),

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

~

~,

~

- ~

~

to............

5 BOC-MOC GNF2 & GNF3 LUA

~

1--

~

1-...

f---

r--... --~

I---

1.4 1.2

-~

1.0 o

10 20 30 40 50 60 70 80 100 110 Power (% Rated)

-- >5OK, Flow, TLO

-- ~ 50.0% Flow, TLO

>5OK, Flow, SLO

~ 50.0% Flow, SLO Power

~ 50.0%

>50% Flow, Power s: 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.74 40.0 1.58 50.0 1.70 50.0 1.54 70.0 1.60 70.0 1.46 70.0 1.57 70.0 1.43 85.0 1.50 85.0 1.36 85.0 1.50 85.0 1.36 100.0 1.44 100.0 1.31 Page 26 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-4b 2.2 I--- -

2.0 1.8

.~

Q.

g:

1.6 u

~

1.4 1.2 c_

1.0 OPERATING LIMIT MCPR VERSUS CORE POWER (MCPRp).

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

~* r_~

~,

~ "

1'-'..

-~

r-----.....

1--- 1--

- -I-I"--....

5 MOC-EOC GNF2 & GNF3 LUA 1"...........

r-----..... 1"......

1-

- ~

1'....

r-----.....

t----

o 10 20 30 40 so 60 70 80 90 100 Power (% Rated)

-- >Srn6 Flow, TLO

.$ 50.0% Flow, TLO

>5rn6 Flow,SLO ----s SO.O%Flow,SLO Power

5 50.0%

>50% Flow, Power

5 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.74 40.0 1.68 50.0 1.70 50.0 1.64 70.0 1.60 70.0 1.55 70.0 1.57 70.0 1.51 85.0 1.50 85.0 1.45 85.0 1.50 85.0 1.45 100.0 1.44 100.0 1.39 Page 27 of 48 COLR Rev. 20-2 110

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-5a 2.2 2.0 1.8

-- ~

11.

a:: fJ 1.6

2 1.4 1.2 1.0 o

10 OPERATING LIMIT MCPR VERSUS CORE POWER (MCPR p),

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

~

~,

'.......... ~

~

7 BOC-MOC GNF2 & GNF3 LUA

~ -.-.

~-;; r-... -.

I I

r-.~~

r-----.......

20 30 40 50 60 70 80 90 100 110 Power (% Rated)

>50% Flow, TLO

$ 50.0% Flow, TLO

>50% Flow, SLO

$ 50.0%Flow,SLO Power

$ 50.0%

>50% Flow, Power

$ 50.0%

>50% Flow,

(% Rated)

Flow, SLO SLO

(% Rated)

Flow, TLO TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.90 40.0 1.73 50.0 1.83 50.0 1.66 70.0 1.73 70.0 1.57 70.0 1.73 70.0 1.57 85.0 1.66 85.0 1.51 85.0 1.52 85.0 1.38 100.0 1.44 100.0 1.31 Page 28 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 7.2-5b 2.2 OPERATING LIMIT MCPR VERSUS CORE POWER (MCPR p),

TLO AND SLO APPLICATION CONDITION:

EXPOSURE RANGE FUEL TYPE:

7 MOC-EOC GNF2 & GNF3 LUA r--

D-o::

2.0 1.8 e

1.6

~

1.4 1.2 1.0 f----

I-I--

o 10 20

~

~'"

t- -

~

1'-.....

~

....... " ~

1--......

r-,..

i-oo..

.... ~...",-...

-~

~

~I 1-1-.......

......... ~"'

30 40 50 60 70 80 90 100 Power 1% Rated)

>50% Flow, TLO s 50.0% Flow, TLO

- - - - >50% Flow, SLO

- - - - s 50.0% Flow, SLO Power

$ 50.0%

>50%

Power

$ 50.0%

>50%

(% Rated)

Flow, SLO Flow, SLO

(% Rated)

Flow, TLO Flow, TLO 23.8 1.79 1.99 23.8 1.76 1.96 40.0 1.67 1.80 40.0 1.64 1.77 40.0 1.90 40.0 1.84 50.0 1.83 50.0 1.77 70.0 1.73 70.0 1.67 70.0 1.73 70.0 1.67 85.0 1.66 85.0 1.60 85.0 1.52 85.0 1.47 100.0 1.44 100.0 1.39 Page 29 of 48 COLR Rev. 20-2 110

~~.h.

___ -._L~. __ __...~~ __._._ __..... _..... ~

... _____.""-'.'-'~.~-'~~_,,~~~.~~..-......:~.. ~~

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.2-1a.

OPERATING LIMIT LHGRFAC VERSUS CORE Flow (LHGRFACF), TLO APPLICATION CONDITION:

1-7 FUEL TYPE:

GNF2 & GNF3 LUA 12 ---f-- ~------J--j------I-----i-+--+_----

1 n -------~----t-----i------I--------I--- -------j----~

o!-7 1 --+----+---1

---i--+----I-------I----'--- ------ -- ------t---- ---

0.8

~+------~--------+--------+------- ---- -.---- --1---- ----+----

-LOO£ r3-~~~L Q ---+---'----- r-- ------1-------+--t----

~ 0.6 ---+--+--l---+--- ----1---+--- ---r' ------ ---------

~

-- ~+/--;:~; fLO I i -----!------I---i--- 1------1----------

0_4 ----t----i-i---r----t---i----t------r-------r---- ------

---t---r----I-----1------+--I---~----i---- -----r--

0.2

t---------~----*-----I----------I----------l------r-----+------+-------- ------ -----

+--------t---------1------------t---------i-------1------+-----+------ -----

I I

0.0..... -

..... --o+---+o---i--...... -.....,---+--....,.--..... -""""'"-.......

o 10 20 30 40 50 60 70 80 90 100 110 Flow (% Rated)

Flow (%

Loop Loop Auto Rated)

Manual TLO TLO 20.0 0.650 0.500 40.0 0.650 0.500 42.4 0.650 0.527 76.6 1.000 0.919 83.7 1.000 1.000 109.5 1.000 1.000 Page 30 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.2-1b.

OPERATING LIMIT LHGRFAC VERSUS CORE Flow (lHGRFACF), SlO APPLICATION CONDITION:

1-7 FUEL TYPE:

GNF2 & GNF3 lUA 1.2 ~-""

I -~

I -'"'I""! -'"'I""

I -"""I"'

I -"""!"

I -~--'

+-----+-----r--------I-------- ---------1--*-----1--------t--------t----------

1.0 --+~-+--_t_--r----l-----r-----,-- *-t-----------

t---+*--r---I---l----~I :~:j==~=~t==t=~~~.~~==.

0.8

.--.-.-~.-.-.-.- t---- ---I-----------f---------... -:' *.

L

.-.-~ * * ~-!----.---t_.----- t------ ----

I I

._.~9_~.e. ~~~-~~~.-r-~C?.-.-+-----.--'--~'... : -- -:;'~41 --.----j---.-.-.---~.---... -j-------.. -. ------.---

u.

I

,I I

~ 0.6 -----,-----+----t----+::-:;; {-----j-------+------r--t-------

(!)

-.-------. ------.-....... ~.......... !-----.. --. -.-.-.---.. j.------.. 1.---.----+--------+---.-.---. -.------

J:

I !

I:

I

..J L op Auto ISLO i

I I!

I i

I 0.4 ---'-r ----... r-----.. --t.. ----*--.. *.. ---...... j---.. --."1"--.. -"1"".... *----t-**.... --.. t----.. --- ------

--+-----~--*--f---*-------- ---------~--------~---*----1--------*-+---------1-----* -.------

0.2

---.. --*~---------r! -------..l-------*t--------- --.-----+.--------~----.-.-.-J.. ----...L----.. -------

I I

I I!

I I

---... ---- ------t-----*-*-t----*----t---------------l------t-----+--*--.. *+--*--.. --------.

i I

I I

i 1

0.0 ~--+---+_-~-__I--..,..-__P--_+_-....;.--+_-...... ---4I o

10 20 30 40 50 60 70 80 90 100 110 Flow (% Rated)

Flow(%

Loop Loop Auto Rated)

Manual SLO SLO 20.0 0.650 0.500 40.0 0.650 0.500 42.4 0.650 0.527 59.99 0.830 0.729 68.84 0.830 0.830 109.5 0.830 0.830 Page 31 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.3-1.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TLO+SLO APPLICATION CONDITION:

1 EXPOSURE RANGE:

BOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 0.8 C1.

0

~ 0.6 LL 0:::

0

I:

...J 0.4 0.0 o 10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

Power s 50.0%

>50% Flow

(% Rated)

Flow 23.8 0.600 0.600 40.0 0.675 0.675 40.0 0.970 50.0 0.970 70.0 1.000 85.0 1.000 85.0 1.000 100.0 1.000 Page 32 of 48 COLR Rev. 20-2

',., ~ I

I

\\

t

~ _ ~ "

\\

r"

...... I

- _~.

.1

.' r'

<-'J~,

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.3-2.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TLO+SLO APPLICATION CONDITION:

2 EXPOSURE RANGE:

BOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 12 ~--~----.---~----.---~----~--~----~--~----~--~

1_0

.-...- --'-r--'-' ---

--1-----

L-------_______ _

____ ~-----

I I

1 I

-l--r---- ------------I------r----I---I---- -

0 _8 ----------r--------r---------- ----------- ------- -------- -------l-------r---------T

r---------

o ---r----r---- ----------l-------r--r--

~ 0_6 ----+-----t- -- --------------+---+-+-----

~

---f---t -----' --------~-----I---+-t---+-----

o.4

~-~I:~:]--+-:L~~~~=-I-::-:~:=I~:::::-1t--l~~: -:~_

1 1

I I

02

______ -.1 --+1-----1----+

1----+------------------1---

_______ ~----------I----------J ----------1.---------1---------i----------- ---------1---------- ----------

0_0 ~--...... ----+_--...... ----.... --_+----_+_--_+----_+_--....j----..... --.....

o 10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

Power

!5: 50_0%

(% Rated)

Flow

>50% Flow 23_8 0_600 0_600 40_0 0_675 0_£75 40_0 0_970 50_0 0_970 70_0 1_000 85_0 1_000 85_0 1_000 100_0 1_000 Page 33 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.3-3.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TLO+SLO APPLICATION CONDITION:

3 EXPOSURE RANGE:

BOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 12 ~--~----~--~----~--~----~--~----~--~----~--~

.- ---_. ----.~----

1.0 --=t=r----~~=F=t -- =- -~~[I-I--+--I 0.8 =J====:~=~~~r=: _t~~::~:=:_1:=-=-,==t=--:- ~==_

~ 0.6 --~-

- ---I-----4-----------

J'-------i--]--------

3 ---i------l ---

-t---t---------r-t-~--------

OA --*-**-*--t*-*---*J 1

--*---*-- *-*--**---t*********-*1.-.---.. -.. -.. --1.-.. --._.

1

...... -..... +

I I

I J

---............... -... +............ *****-****--r*-**********

-********--j*-*****~***l-******-*-r****-*-*-r-*******-.... -.-

02 ---------f----

r --t-- 1-----j-------1'-*----***.... -.... -

I I

I

.-.......... _......... -.. -.. - *-**-*****-r---*--*.---.. -.... -... --.. j..... _..... -.-.. -_..... -... -... --.. -

0.0 ~-.... --+---+--...... --..... --+---+--..... --+--.... -....,

o 10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

Power s: 50.0%

(% Rated)

Flow

>50% Flow 23.8 0.600 0.600 40.0 0.675 0.675 40.0 0.675 50.0 0.860 70.0 0.950 85.0 0.975 85.0 1.000 100.0 1.000 Page 34 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.3-4.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TL~SLO APPLICATION CONDITION:

4 EXPOSURE RANGE:

HOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 12 ~~~

1 --~

1

~

1--~~~--~~~

~--*---r-t-T---i------ ------------ -~ --

1.0

---*---I----1-----r----*t::

~ :;:

---::-1;,;

- ;;;.;-+-*--'1-'--,1...,----

I I

I I----+-----.r--r--- r --- -----. ------ ---.----r-------J.. ----------

0.8 Q.

0 c( 0.6

u.

Ir:

0

I:

..J 0.4

. -----. -*---*-*v 1------... ----.--.---j------.-. --.-.. ----.- --------t-----r.---

--_.-.- ---*--*I*--~

--*----f*------*-.---.-.----.--.-.-- -----.--.- ---*---r----*--.---

-~-~:j~:-:-i+=j-:~t:~-~-~~::---:~-I~~::=-::~~~=:l=-=:-=~=

l I

I I

i

.. -.. -.... -... ------*-*t*-*.. ---. -.-!.. -... -. **-f ---..... -.-.. -... -.. -j.-.... -.. ---j. -.. -. --... - ----.------~-.---------- ---------

02

+------------~--------*f--**--*---f*-**---*... -j...... -.. -.-~.-.... -.--.~.-.. -.-.. -.~----------.-l------.----. ------.----

I I

I I:

I

---***-t--t--*--****

t----- ------ --t-----t-*--*-*-*.-.--------

0.0 ~---+---+_-.... -~~-...... -....;--..... -.... --+_-...... -.....,

o 10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

Power

~ 50.0%

(% Rated)

Flow

>50% Flow 23.8 0.600 0.600 40.0 0.675 0.675 40.0 0.970 50.0 0.970 70.0 1.000 85_0 1.000 85.0 1.000 100.0 1.000 Page 35 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.3.5.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TLO+SLO APPLICATION CONDITION:

5 EXPOSURE RANGE:

BOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 12 ~--~--~----~--~----~--~--~----~--~--~--~

___ ~ _____ ~ ____ +_+-________ i ________ j ____ r __________ _

1_0 --

-I' --------- -----

~ --1---- --

--1-- -----+--------- ------------ ----- ----- -----J----... _____

I I

0_8 ----r~-t-- -------- -----1----- ----I-~------

l 0.6 ~:=-=t==~:~1 ::~~I~~::--::~=~::=r=~===t=~~==

~

t--------t--------- ----------t----------- ---------- ---------r---t--+-----------

0_4 ---r---r---- ----------1------ -------I-------r--l----------l---------- ---------

r -----------+ ------------r ------------f----------------. ------.J ------------1 ------------ ----------- ----------or ---------

~

I l

Iii i 02

~:~=- :::::~:~l~~=-:~ -~:-:~:~l~-::----1-~::::::t:::-:::~l-: :_::[==:1_:=:_ ~=~~

I I

0_0 0 10 20 30 40 50 60 70 80 90 100 '

110 Power (% Rated)

~ 50_0%

Flow 0_600 0_675 Page 36 of 48

~

--~-

>50% Flow 0_600 0_675 0_970 0_970 1_000 1_000 1_000 1_000 Ml~~~~'~-:""-~~~~

__,... _ 1.

COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 0..

0

~

LL.

a::

0 J:

..J FIGURE 8.3-6.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TLO+SLO APPLICATION CONDITION:

6 EXPOSURE RANGE:

BOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 12 ~--~----~--~--~~--~--~----~--~----~--~ __ ~

--+----~--- -----1--- --------.--+

---r-0.8 1"0 ---+---t---I--~----- ----------1----- -..", -+----+----1 1----- ~.-----T-*-*--I---+------* ~

~+_---.l------I-------- ----.-

--+---~-----I-I

---_l-l--~-----

.--+---+----- ~lL--1 --- -----i-----L----t--r--

0.6 0.4

------+.-~

.--.-.--.-------.-.. ------.-.. -.---~---.-- ------l*---------------

I

.----. -*---*---**t*-*---*--*-*-*-****---f**--------_*..... ---.-. __._._--.- ---._-_._.- ---.. -_._.-... ----.-- --------

'I

---I--['-I----!--------------

02

~-~::T:::l:--:-::--:::--I:--:::=:--~l-~--1~:~: -==:--~--

I I

I

-. __._._-. ---*---*-T*-----_*-* -.. _-._._... _. __.-.. -.. ------.-- *-**_*-*_-1---*---1----.--------t--.--

I I

0.0..... ---+----+----+---...01'!~--_+_--_+----.... --_+----... --.... --.....

o 10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

Power

~ 50.0%

(% Rated)

Flow

>50% Flow 23.8 0.600 0.600 40.0 0.675 0.675 40.0 0.675 50.0 0.860 70.0 0.950 85.0 0.975 85.0 1.000 100.0 1.000 Page 37 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 FIGURE 8.3-1.

OPERATING LIMIT LHGRFAC VERSUS CORE POWER (LHGRFACp), TLO+SLO APPLICATION CONDITION:

7 EXPOSURE RANGE:

BOC-EOC FUEL TYPE:

GNF2 & GNF3 LUA 12 ~--~----~--~----~--~----~--~----~--~----~--~

0_8 E>-o oc( 0_6 LL.

I::t::

0 J:

...J 0.4 1_0 I

I I

--r----r---- ------r-------- ----

t----t---------+------ --- ----------l-----, ---

--t----r--- ----r -i -- -t--t----r--------

---r--T----- --------

1-------~------1-----1----"--------

I-----f- ---I---r---J 1---+---r --+-----

I---- -r----I--l--r-- ---1----t--------

T--------l----------- -----------j------------j ----------- -----------1 ------------r----------- ---------l---------

-~ -----------t------------ -----------of ------------1------------ ------------1 ------------t-------------------- --------

~

I 1

I I

I 02

-~::_:::I -~~:~:J_:~ ___ :

I ::: :::~:r~=~_' ::~~I::~-~I:-:I:-::~:r~~=~~~~--

I I

0_0..... -

.... --+---+--~--.... -.... --_i_-.... --+_-....... -__f o

10 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

Power

~ 50_0%

(% Rated)

Flow

>50% Flow 23_8 0_600 0_600 40_0 0_675 0_675 40_0 0_675 50_0 0_860 70_0 0_950 85_0 0_975 85_0 1_000 100_0 1_000 Page 38 of 48 COLR Rev_ 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-1 :

Monitored Region Boundary (Case 1) 120 110 100 90 80 "0

Q)...

IV 70

~

~ 60 a:

W

~ __ I ___ l_

I I

J I I I

1_-

I I --

I

~ V I I

~

I

./

I J

~ -

./ ---

~

50 0

0..

W 40 a:

0 u 30

~--r-----,-- "-- I-f-- V I

~

[7" 20 10 j

.jiii."

II-1/--,

I

~ L I

I I

o ill'"

~

o 10 20 30 40 50 60 70 80 90 100 110 CORE FLOW (% rated)

Page 39 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-2:

Monitored Region Boundary (Case 2) 120 110 100 90

--g 80 III...

I

~.

I

-i--t I I I V I

l II"""

~

I

~ 70

-"r ~

I ~

0::

W 60

~

o Cl. 50 W

~ 40 U

30 20 10 o

I f-.------ t-- -- --

I --r--

/

I V

-- --V I

~

..... ~

/--) I

---,"./ I o

10 20 30 40 50 60 70 CORE FLOW (% rated)

Page 40 of 48 t- ---

--~-

I

~

I 80 90 100 110 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-3:

APRM Flow Biased Simulated Thermal Power -

High Scram Setpoints and Restricted Region Boundary (Two Recirculation Loop Operation - Case 1) 120 110 100 90 80

£"

~

! 10

.Ie e...-

a:

w 60

~

Il.

W 50 a:

8 40 30 20 10 0

0 I

I I

~--- ---- +-- -----~------~-------+---- ---I-------~-

I I

I

______ J _______ ~ _______ L ______ ~ _______ ~ ___ _

___ J _______ L ______ J _______ ~ ______ _ L _ __ __ _

I I

,-------T-------r------,----

- -- - - - -,- - -- - --,- - - -- -- r -- - -- - -,- - - - -- - j- - -- - -- r- - ----

I I

I

~-------+-------~-

I I

I I

,-------1------

I I

~-------T----

I I

~-------~-------~

I------- ~ --- ___ ~ _____ _

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--T------~-------l-I I

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- - - -.,.- -- - -- --- - -- "i -

I I

_ __ _ _ _ _ J. ____ ___ 1 _______.J _

I I

1 I

I 1

---,-------r------,-------,-

I I

o S

Nominal Value Allowable Value TLO Restricted Region BOlmdary High Endpoint Setup Scram I -,------

I I

I I -t-------

_ L _____ _

I I

on-Setup Scram

- r ------

RR Restricted Region I

1 I

I I

--~------~-------+-------I-------"i-I 1

I I

I

+-

1---

--- ~ -------.... ------

I I

1 I

I I

I 1

I J _______.1 _______ L ______ J _______.1. _______ 1 _______.J _______ 1. _______, _______ J _______ L _____ _

I I

I 1

I I

1 1

I I

1 I

I I

I 1

1 1

1 I

I 1

1 1

1 I

1 1

I I

I

- - -- - T- - - - - - -,- - -- - -,- -- - - - -T - -- - - - - --- --,- - - - - -- r -- --- - -,- - - --- -.-- - - - - - r- - -- --

1 1

1 I

I 10 20 30 50 60 ro

~

90 100 110 AUGNED DRIVE FLOW (% rated) 120 Page 41 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-4:

APRM Flow Biased Simulated Thermal Power -

High Scram Setpoints and Restricted Region Boundary (Two Recirculation Loop Operation - Case 2) t 20 t10 t OO 90 +-T--

g 1O ++=

l! 70

~

Nominal Value a:

w &0 i-"--

~

~ SO

-.0, w

a:

0 u 40 30 o

10 20 30 so so TO 80 90 tOO 110 120 ALIeNED DRIVE FLOW (% rattd)

Page 42 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-5:

APRM Flow Biased Simulated Thermal Power -

High Scram Setpoints and Restricted Region Boundary (Single Recirculation Loop Operation - Case 1) 120r------r-----.------.------r-----.r-----.------.------r-----,-----~------r_----.

110 100 90 80 j

f 70

~

a::

~

60 a..

I I

-- - -- -.... - - - - -- - +- - - - -- -~- - -- - - ____ __ + _____ __ 1 _______.... _______ '- _ ______ 1 _______ - - - -- -~-- - - --

I I

11...... ::~~~~~~~~~~~~~~~t~~~~

I I

:-------+-------:--------:-------+ -------:---

t -------:--- ----1-------r------

I I

I

' I ' I 1

1 1

I I

I

;-------~-------r------,------- - -- - --;- -- - - -- r-- - -- - -

~- -

- -t-- - -- --

I I

I

~ _______ i ___ __ __

~ __ _

I I

,-------r------

I,

I I

I

;-------~ ----

I I

__ l _______ : _______ J Nominal Value

__ L _____ _

I I

I Allowable Value I

I I

I

--r-------,-------,

--r----- -

I I

0 SLO Restricted Region I

I

____ + _______ : _______ ~

Boundary High Endpoint

_ - ~- - -- --

I I

S Setup Scram I

I I

I w 50 a::

_______..L _______ 1 _______..J

N Non-Setup Scram

__ L _____ _

I I

o o

I I

RR Restricted Region

---,-------T-------~------,

I

--t------

L-------r-------.--------,----~

I I

I

-~- ---- -""1- -

- - -- - --""1- -

- -- ~-- - --- -

~ - -

-~-- -- --

I I

I

' I I

1 1

1 I '

1 I

I I

I 20 --- --~ -----t-------:--------;-------t -------:--------: -------: -------:-------1-------:------

I I

I 10 I

I I

I

-- - -- -,--- - -- - T - - - - - - -,- - - -- - -, - --- - - - T - -- - - --,- - --- --, - - - - - -- r -- - -- - -,- - - - -- - j- -

- - -- -r- - ----

I I

0+-~--~~--~~~--~_4--~_+--~_+--~_+--~~--~~--~~~~~~~

o 10 20 30

~

ro

~

90 100 110 120 AUGNED DRIVE FLOW (% rated)

Page 43 of 48 COLR Rev. 20-2

-,.....~ -

~ -

-~

~-~

.~ -_.

-~~"---.-'-.-'-~.... ~-~-~

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-6:

APRM Flow Biased Simulated Thermal Power - High Scram Setpoints and Restricted Region Boundary (Single Recirculation loop Operation - Case 2) 110 10

~IIO

.. 70

~

a:

IU IiO

~

o Q. IiO IU a: o u 40 30

dSl Pl JRRl u ** _

L.

./

- '-'-. _ -- t--.

9i I

/ ;. V/ 1

~

!/ / /

~

r~ V 0

~

.~-...-.... _

... _- f-o *

/

~

/ ;

NomuW a1u@

~L ____ -

ADo 3bl alut'

+/-

0 SLO R.es1nC:~ R.!!IDn BOllnduy High Endpoint s

SttupSmm N

~on.sf'nIP RR R.tstncl*lRtf1011

.. - "'- - r-'-- - --'---_.

10 o

o A()

60 M

7 80 100 120 AUGNeDD~V£FLOW(% r~

Page 44 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-7:

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Two Recirculation Loop Operation - Case 1) 120 110 100 90 80 j

nI 70

~

t.-

o::

W

~

60 Q.

W 50 0::

0

()

40 30 20 10 0

0 I

I I

- -- -- -~ - - - - - - - ~ -- - ---- ~ - -- - --i-------~-------:-------~-------~~~::::::~::::::~::::::::~::::::~

I I

:-------+-------:--------:-------+-------:----

r -------:-------1-------l-- -----

I I

j I

I I

-- - -- -;-- - - -- -T- -

- -r- - -- - -,-- - - - - - - -- - --, - --- - -- t' --- -- - -

- - ---'"T- -

- - r-- - - - --

I I

I J

I I

______ J _______

~ ____ _ __ L _ _ ____ J __

I I

I

,-------T------

I I,

I I

I

;-------T-----

I I

-- - - -- ~ --- - --- ~ -- - - -

I I

I

_______ 1 _______ J _______ 1. _______ 1 _______..1 _______ L _____ _

I I

T-------I-I I

I I

S

,-------r------

I I,

Nominal Value I

I I

Allowable Value

--- - ; - - - ----~----- -

I I

Setup Rod-8Iock

____ 4 ___ ____ ~ _ _ __ _ _

I I

NS Non-Setup Rod-Bloclt I

I I

---~-------t -------:- '-__ -,-___ -,,-___,----J----4-------t- --- --

I I

I

--~------~-------~-------1-------4-------~--- - ---1-- ---- - -- - -- ~--- - - -

I I

1 I

I 1

1 1

I I

I 1

I

___ _ __ ~ _______ ~ ___ __ __ ~ __ _ __ _ ~ _ _ ___ __ ~ ___ _ ___ I ____ ___ ~ _______ L ______ _ I __ _ ____ J _______ L _____ _

I I

I 1

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I 1

1 I

I 1

I I

I 1

1 I

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1 I

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1 I

-- - -- -,- - - - -- - T- - - - - - -.-- - -- - --,- - - - - - -T - -- - - - -,- - -- - --, - - -- - -- r-- - -- --1-- - - -- -,- - - - - -- r- - -- --

I I

1 1

I I

I 1

I I

10 20 30

~

ro w

ro

~

90 100 110 AUGNED DRIVE FLOW (% rated) 120 Page 45 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-8:

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Two Recirculation Loop Operation - Case 2) 110 110.f-----I--- _._-+--+-

1CH) 90.f------I-

~

$O --+-_.- -... - -

... 10

~

Hom V~

+-----1-- - _.. -... _.-

0::

W

$0

~ +-- -_. ----*--+-~r_;_- --,~*+_I_--_t_-___1j 0

A.

50 W

pj CJ

~

3j) 20 10

+---~---- - ------+--I-~_hI'--,.'--..

H Hon-Setup Rod~ loC'J1 i

. --------r--r--- -_

.. -- -- --t---..

.. -.... ----t-+-.-t-... ---

----t*-*--*

--'-'-1 0

... _.-t--4-.-_

0 f

l---+--1--1--

.. _.... 1***_.... -

.. *--1 ___ 1 ___._._... _...1 -'-'1--'--1'--

0 0

to 20

~

M

~

tOO HO no ALIGNED DRIVE FLOW (% rattd)

Page 46 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1 -9:

APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Single Recirculation Loop Operation - Case 1) 120 110 100 90 80 l!

t! 70

~

a:

w 60

~

Q.

W 50 a:

0

()

40 30 20 10 0

0 I

I I

t I

I I

______ -1 _______ + _______

~ ______ -1 _______ + _______ 1 _______ -1 _______ &- _______ 1 _______ ~ _______ ~ _____ _

I I

t I

I I

I

l-------T-------~------,-------T------~-------l-------------------------------------

I I

I t

I I

I

4-------T-------r------4-------~------

--'"1- - -- - -- t' -- - -- - -- - -- -"t- -

- - r- - ----

I I

~

_______ L ______

~

______ 1 _______.J _______ 1. _______ 1 _______..1 _______ L _____ _

I I

,-------T------

I I

I

,-------~-----

I I

______ ~ _______ L ____ _

I I

--T-------,-

I I

~-------,-

I I

_______ L _______ I _

S I

I I

Nominal Value Allowable Value Setup Rod-Block I

I

,-------r------

I I

~-------r------

I I

~-------~------

I I

I Non.Setup R~1ock I

NS I

I I

---~-------+ -------:-

~ -------t------

I I

I L-__

I I

I

--~------~-------?------~-------~-------~-------I-------~-------~------

I I

I

______.J _______.1. _______ L ______.J _______.1. _______ 1 _______.J _______ 1. _______ 1 _______.l __ _____ L. _____ _

I I

-- - -- -,- - - - --- T- - - - - - -r- - -- - --,- - - -- - -T - -- - - - -,- - -- - --, - - - - - -- r -- - -- - -,- - - - -- -.,- - - - - - - r- - ----

I I

I 10 20 40 50 60 70 80 90 100 110 AUGNED DRIVE FLOW ('Yo rated) 120 Page 47 of 48 COLR Rev. 20-2

River Bend Station Core Operating Limits Report - Cycle 20 Revision 2 Figure 9.1-10: APRM Flow Biased Neutron Flux - High Rod-Block Setpoints (Single Recirculation Loop Operation - Case 2) 120r-----.----.-----.----.-----.-----r----.-----.-----.----,-----.----.

100 to 10 i

.. 70

~

bIe.... Iu.

~

w co

~

w 50

.. _-_._--i

~

0

-40 20

.. _ ***t* __ *

- t***_*

10 o

lO 20 40 70 to to lOO HO 120 ALIGNED DRIVE FLOW rt. rated)

Page 48 of 48 COLR Rev. 20-2

v t e Letter Sequence Request
EPID:L-2018-LLA-0298, License Amendment Request Criticality Safety Analysis, Technical Specifications 4,3.1, Criticality, and Technical Specification 5.5, Programs and Manuals (Approved, Closed)
Initiation Request, Request Acceptance Supplement Administration Withholding Request Acceptance Questions Answers Results Approval Other:
MONTHYEAR2019-01-02 [Table View]

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Text

SUBJECT:

Dear Sir or Madam:

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