L-10-083, Core Operating Limits Report for Cycle 17

Core Operating Limits Report for Cycle 17

ML101790023
Person / Time
Site:	Davis Besse
Issue date:	06/23/2010
From:	Allen B FirstEnergy Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-10-083
Download: ML101790023 (26)

Text

FENOC"0N0% 5501 North State Route 2 FirstEnergy Nuclear Operating Company Oak Harbor, Ohio 43449 Barry S. Allen 419-321-7676 Vice President

-Nuclear Fax: 419-321-7582 June 23, 2010 L-10-083 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

SUBJECT:

Davis-Besse Nuclear Power Station, Unit No.1 Docket No. 50-346, License No. NPF-3 Core Operatinq Limits Report for Cycle 17 Enclosed please find the Davis-Besse Nuclear Power Station, Unit No. 1 (DBNPS) Core Operating Limits Report for Cycle 17, Revision 0. Submittal of this report is in accordance with DBNPS Technical Specification 5.6.3, "Core Operating Limits Report (COLR)." There are no regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Thomas A. Lentz, Manager -Fleet Licensing, at (330) 761-6071.Sincerely, Barry S. A7Zen

Enclosure:

FirstEnergy Nuclear Operating Company, Davis-Besse Unit 1, Cycle 17, Core Operating Limits Report, Revision 0 cc: NRC Region III Administrator NRC Resident Inspector NRR Project Manager Utility Radiological Safety Board M2JD Enclosure FirstEnergy Nuclear Operating Company, Davis-Besse Unit 1, Cycle 17, Core Operating Limits Report, Revision 0 (24 Pages Follow)

Davis-Besse Cycle 17 COLR Page 1 of 24 Revision 0 FIRSTENERGY NUCLEAR OPERATING COMPANY DAVIS-BESSE UNIT 1 CYCLE 17 CORE OPERATING LIMITS REPORT Prepared by Reviewed by L,3I;l /3 b, 4, D. B. Kelley P. R. Gilles:}Approved by R. J. Borland LIST OF EFFECTIVE PAGES Page 1 through 24 Rev. 0 Davis-Besse Cycle 17 COLR Page 2 of 24 Revision 0 1.0 Core Operating Limits This CORE OPERATING LIMITS REPORT for DB-1 Cycle 17 has been prepared in accordance with the requirements of Technical Specification 5.6.3. The Core Operating Limits have been developed using the methodology provided in Reference 2.0 (1). The licensed length of Cycle 17 is 685 EFPDs.The following cycle-specific core Operating Limits, Protective Limit and Flux -A Flux -Flow Reactor Protection System Allowable Values are included in this report: 1.2.3.4.5.6.7.8.9.10.11.12.SL 2.1.1.1 LCO 3.1.1 LCO 3.1.3 LCO 3.1.7 LCO 3.1.8 LCO 3.1.9 LCO 3.2.1 LCO 3.2.2 LCO 3.2.3 LCO 3.2.4 LCO 3.2.5 LCO 3.3.1 Reactor Core Safety Limits SHUTDOWN MARGIN (SDM)Moderator Temperature Coefficient (MTC)Position Indicator Channels PHYSICS TESTS Exceptions

-MODE 1 PHYSICS TESTS Exceptions

-MODE 2 Regulating Rod Insertion Limits AXIAL POWER SHAPING ROD (APSR) Insertion Limits AXIAL POWER IMBALANCE Operating Limits QUADRANT POWER TILT (QPT)Power Peaking Factors Reactor Protection Systems (RPS) Instrumentation Function 8: (Flux -AFlux -Flow) Allowable Values Boron Concentration Rod Program 13. LCO 3.9.1 14. TRM 8.1.3 2.0 References

1) BAW-10179P-A, Rev. 7, "Safety Criteria and Methodology for Acceptable Cycle Reload Analyses", January 2008.2) BAW-10164P-A, Rev. 6, "RELAP5/MOD2-B&W-An Advanced Computer Program for Light Water Reactor LOCA and Non-LOCA Transient Analysis", June, 2007.

Davis-Besse Cycle 17 COLR Page 3 of 24 Revision 0 Table of Contents Page Reactor Core Safety Limits Figure 1 AXIAL POWER IMBALANCE Protective Limits 5 SHUTDOWN MARGIN (SDM)Table 1 Shutdown Margin Requirements 6 Moderator Temperature Coefficient (MTC)Table 2 Moderator Temperature Coefficient Limit 7 Position Indicator Channels Table 3 Absolute Position Indicator (API) / Relative Position Indicator (RPI)Agreement Limit 8 Regulating Rod Insertion Limits Figure 2a Regulating Group Position Operating Limits -Four RC Pumps From 0 to 300 +/- 10 EFPD 9 Figure 2b Regulating Group Position Operating Limits -Four RC Pumps After 300 +/- 10 EFPD 0 10 Figure 2c Regulating Group Position Operating Limits -Three RC Pumps From 0 to 300 +/- 10 EFPD 11 Figure 2d Regulating Group Position Operating Limits -Three RC Pumps After 300 +/- 10 EFPD 12 AXIAL POWER SHAPING ROD (APSR) Insertion Limits Figure 3 APSR Position Operating Limits- 2817 MWt RTP 13 AXIAL POWER IMBALANCE Operating Limits Figure 4a AXIAL POWER IMBALANCE Operating Limits -Four RC Pumps From 0 to EOC 14 Figure 4b AXIAL POWER IMBALANCE Operating Limits -Three RC Pumps From 0 to EOC 15 QUADRANT POWER TILT (QPT)Table 4 QUADRANT POWER TILT Limits 16 Power Peaking Factors Table 5 Power Peaking Factors -FQ (NAS) 17 Table 6 Power Peaking Factors -FQ (FIDMS) 18 Table 7 Power Peaking Factors -FNAH 20 Figure 5 Maximum Allowable Radial Peak For FN AH in Mark-B-HTP Fuel Assemblies 20 Table 8 Maximum Allowable Radial Peak Davis-Besse Cycle 17 COLR Page 4 of 24 Revision 0 For FN H in Mark-B-HTP Fuel Assemblies 21 Reactor Protection System (RPS) Instrumentation Figure 6 Flux-AFlux-Flow (or Power/Imbalance/Flow)

Allowable Values 22 Boron Concentration Table 9 Refueling Boron Concentration Limit 23 Rod Program Figure 7 Control Rod Core Locations and Group Assignments 24 Davis-Besse Cycle 17 COLR Page 5 of 24 Revision 0 Figure 1 AXIAL POWER IMBALANCE Protective Limits 2817 MWt RTP, Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specification 2.1.1.1 120 -(-44.69, 110.2)(38.09, 110.2)110.(-49.00, 100.0)(-49.00, 81.20)UNACCEPTABLE OPERATION IUU 1 (-44.69, 91.40)4 PUMP LIMIT (38.09, 91.40)3 PUMP LIMIT 4!/90+80.(49.00, 100.0)(49.00, 81.2)UNACCEPTABLE OPERATION 70+E 0~-J U]0 C1.60+50+40+ACCEPTABLE OPERATION FOR SPECIFIED RC PUMP COMBINATION 30+20+10+-80 60 40 20 -10 0 10 20 30 40 AXIAL POWER IMBALANCE, %50 60 70 80 Pumps Operating 4 3 Reactor Coolant Flow, qpm 380,000 283,860 Required Measured Flow to Ensure Compliance, qpm 389,500 290,957"I Davis-Besse Cycle 17 COLR Page 6 of 24 Revision 0 Table 1 Shutdown Marqin Requirements Verify SHUTDOWN MARGIN per the table below.REQUIRED SHUTDOWN TECHNICAL SPECIFICATIONS APPLICABILITY MARGIN LCO REFERENCE MODE 1* > 1 %Ak/k 3.1.4, 3.1.5 MODE 2* > 1 %Ak/k 3.1.4, 3.1.5, 3.3.9 MODE 3 >1 %Ak/k 3.1.1, 3.3.9 MODE 4 1 %Ak/k 3.1.1, 3.3.9 MODE 5 1 %Ak/k 3.1.1, 3.3.9 MODE 1 PHYSICS TESTS 1 %Ak/k 3.1.8 Exceptions**

MODE 2 PHYSICS TESTS 1 %Ak/k 3.1.9 Exceptions

• The required Shutdown Margin capability of 1%Ak/k in MODE 1 and MODE 2 is preserved by the Regulating Rod Insertion Limits specified in Figures 2a through 2d as required by Technical Specification 3.2.1.** Entry into Mode 1 Physics Tests Exceptions is not supported by existing analyses.

For example, Regulating Rod Shutdown Margin Insertion Limits assumptions may not be met and as such requires actual shutdown margin to be > 1 %Ak/k via alternate verification or calculation.

Davis-Besse Cycle 17 COLR Page 7 of 24 Revision 0 Table 2 Moderator Temperature Coefficient Limit These limits are referred to by Technical Specifications 3.1.3 1. Lower Limit: MTC at HFP > -3.81x10-4 Ak/k/°F 2. The following Upper Limits may not be exceeded without prior NRC approval: MTC <0.9 x 10' Ak/k/0 F when Thermal Power <95% RTP MTC <0.0 x 10-4 Ak/ki°F when Thermal Power >95% RTP 3. The following Upper Limits may not be exceeded for operation in Modes 1 and 2: 04-U 0 2 0 10OE-04 9.0E-05-8.0E-05 7.0E-05-5.0E-05 5.0E-05 14.0E-05D 3.0E-05 2 .0E-05 1 .0E-05 0.OE+00-----------------------

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0 20 40 60 Percent Full Power 80 100 Davis-Besse Cycle 17 COLR Page 8 of 24 Revision 0 Table 3 Absolute Position Indicator (API) / Relative Position Indicator (RPI)Agreement Limit This limit is referred to by Technical Specifications 3.1.7 The absolute position indicator channels and the relative position indicator channels agree within 3.46%.

Davis-Besse Cycle 17 COLR Page 9 of 24 Revision 0 Figure 2a Regulating Group Position Operating Limits 0 to 300 +10 EFPD, Four RC Pumps--2817 MWt RTP Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specifications 3.2.1 110 100 0~-j Lu I 0)EL, 90 80 70 60 50 40 30 20 10 0 Unacceptable Operation I lI I l l I I f l [ l l Operation Restricted Shutdown Margin Limit SAcceptable 7: : I peration --i ii.1l 0 25 50 75 100 125 150 175 200 225 250 275 300 0 1 75 Rod Index, %Withdrawn 100 I Group 5 0 1 25 75 1 100 I Group 6 0 1 25 1 100 I Group 7 Note 1: A Rod Group overlap of 25 +/- 5% between sequential withdrawn groups 5 and 6, and 6 and 7, shall be maintained.

Note 2: Instrument error is accounted for in these Operating Limits.Note 3: Maximum plotted power level is 100.37 %RTP.

Davis-Besse Cycle 17 COLR Page 10 of 24 Revision 0 Figure 2b Regulating Group Position Operating Limits After 300 +10 EFPD, Four RC Pumps--2817 MWt RTP Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specifications 3.2.1 110 100 uJ 0 0~13-90 80 70 60 50 40 30 20 10 Unacceptable

-Operation-r-4-A Operation SRestricted Shutdown Margin Limit Acceptable Operation 4-+H-0 r l f l ' r ' f 0 25 50 75 100 125 150 175 200 225 250 275 300 0 1 75 Rod Index, %Withdrawn 100 I I I I Group 5 0 1 25 75 I 100 I i f I I Group 6 u 1 100 I Group 7 Note 1: A Rod Group overlap of 25 +5% between sequential withdrawn groups 5 and 6, and 6 and 7, shall be maintained.

Note 2: Instrument error is accounted for in these Operating Limits.Note 3: Maximum plotted power level is 100.37 %RTP.

Davis-Besse Cycle 17 COLR Page 11 of 24 Revision 0 Figure 2c Regulating Group Position Operating Limits 0 to 300 +10 EFPD, Three RC Pumps--2817 MWt RTP Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specifications 3.2.1 110 100 I / : : , i i ! i 0 IL-j 0 EL 90 80 70 60 50 r+/-,.Unacceptable Operation 4III I i I11 Il Iii Shutdown Margin Limit Operation Restricted I 40 30 20 10 Acceptable

_Operation 0 0 25 50 75 100 125 150 175 200 225 250 275 300 0 1 75 Rod Index, %Withdrawn 100 I Group 5 0 1 25 75 1 100 I Group 6 0 1 25 100 I Group 7 Note 1: A Rod Group overlap of 25 +/- 5% between sequential withdrawn groups 5 and 6, and 6 and 7, shall be maintained.

Note 2: Instrument error is accounted for in these Operating Limits.Note 3: Maximum plotted power level is.75.37 %RTI?..

Davis-Besse Cycle 17 COLR Page 12 of 24 Revision 0 Figure 2d Regulating Group Position Operating Limits After 300 +10 EFPD, Three RC Pumps--2817 MWt RTP Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specifications 3.2.1 110 100 0 0~0-90 80 70 60 50 40 30 20 10 Unacceptable Operation~iiN Shutdown Margin Limit Operation Restricted]

I I I I I I I I-_ ; jr Acceptable 1_ 1i ! ~Operation

.. T: : II I I -I 0 25 50 75 100 125 150 175 200 225 250 275 300 0 0 G Group 5 75 Rod Index, %Withdrawn 100 I 0 25 75 1 100 I II I (Group b u 25 I 100 I Group 7 Note 1: A Rod Group overlap of 25 +5% between sequential withdrawn groups 5 and 6, and 6 and 7, shall be maintained.

Note 2: Instrument error is accounted for in these Operating Limits.Note 3: Maximum plotted power level is 75.37 %RTP.

Davis-Besse Cycle 17 COLR Page 13 of 24 Revision 0 Figqure 3 APSR Position Operating Limits This Figure is referred to by Technical Specifications 3.2.2 Before APSR Pull: 0 EFPD to 615 +/- 10 EFPD, Three or Four RC pumps operation*

Lower Limit: 0 %WD Upper Limit: 100 %WD After APSR Pull: 615 +/- 10 EFPD to End-of-Cycle Three or Four RC pumps operation*

Insertion Prohibited (maintain

> 99%WD)* Power restricted to 75.37% for 3-pump operation.

Davis-Besse Cycle 17 COLR Page 14 of 24 Revision 0 Figure 4a AXIAL POWER IMBALANCE Operating Limits 0 EFPD to EOC, Four RC Pumps--2817 MWt RTP Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specification 3.2.3-60 40 20 -10 0 10 20 30 40 50 60 AXIAL POWER IMBALANCE

%Note 1: Instrument error is accounted for in these Operating Limits.Note 2: The Excore Imbalance Operating Limits are available for use when the Full Incore system is non-functional.

Note 3: Maximum plotted power level is 100.37 %RTP.LEGEND FULL INCORE EXCORE E)

Davis-Besse Cycle 17 COLR Page 15 of 24 Revision 0 Figure 4b AXIAL POWER IMBALANCE Operating Limits 0 EFPD to EOC, Three RC Pumps--2817 MWt RTP Davis-Besse 1, Cycle 17 This Figure is referred to by Technical Specification 3.2.3-60 40 20 -10 0 10 20 30 40 50 60 AXIAL POWER IMBALANCE

%Note 1: Instrument error is accounted for in these Operating Limits.Note 2: The Excore Imbalance Operating Limits are available for use when the Full Incore system is non-functional.

Note 3: Maximum plotted power level is 75.37 %RTP.LEGEND FULL INCORE EXCORE Davis-Besse Cycle 17 COLR Page 16 of 24 Revision 0 Table 4 QUADRANT POWER TILT Limits This Table is referred to by Technical Specifications 3.2.4 From 0 EFPD to EOC Steady-state Limit Steady-state Limit QUADRANT for THERMAL for THERMAL POWER TILT as POWER < 60% POWER >60% Transient Limit Maximum Limit measured by: (%) (%) (%) (%)Symmetric Incore 7.90 4.44 10.03 20.00 Detector System Davis-Besse Cycle 17 COLR Page 17 of 24 Revision 0 Table 5 Power Peaking Factors -FQ (NAS)This Table is referred to by Technical Specifications 3.2.5 The measured FQ shall be increased by 1.4% to account for manufacturing tolerances and further increased by 7.5% to account for measurement uncertainty before comparing to the limits.Heat Flux Hot Channel Factor FQ FQ shall be limited by the following relationships:

F, < LHRallw (Bu) / [LHRavg

• P] (for P 5 1.0)LHRa"'W (Bu) = See the following tables LHR av = 6.4322 kW/ft at 2817 MWt for Batch 17B, 17C2, 17D and 17E2 Mark-B-HTP fuel LHRav, = 6.4209 kW/ft at 2817 MWt for Batch 18A2, 18B and 18C Mark-B-HTP fuel LHRavg = 6.4209 kW/ft at 2817 MWt for Batch 19 A-D Mark-B-HTP fuel P = ratio of THERMAL POWER / RATED THERMAL POWER Bu = fuel burnup (MWd/mtU)U0 9 Fuel (Mark-B-HTP)

-All Batches LHR ALLW kW/ft(a)Axial Segment 1 2 3 4 5 6 7 8 0 MWd/mtU 17.6 17.5 17.4 17.4 17.0 16.2 15.6 15.4 40,000 MWd/mtU 17.2 17.1 17.1 17.1 16.7 16.3 15.7 15.5 62,000 MWd/mtU 13.1 13.1 13.1 13.1 13.1 13.1 12.6 12.4 (a) Linear interpolation for allowable LHR between specified burnup points is valid for these tables.

Davis-Besse Cycle 17 COLR Page 18 of 24 Revision 0 Table 6 Power Peaking Factors -FQ (FIDMS)This Table is referred to by Technical Specifications 3.2.5 The measured FQ shall be increased by 1.4% to account for manufacturing tolerances and further increased by 7.5% to account for measurement uncertainty before comparing to the limits.Heat Flux Hot Channel Factor F 0 FQ shall be limited by the following relationships:

F -< LHRallOw (Bu) / [LHRavg

• P] (for P < 1.0)LHRallW (Bu) = See the following tables LHRavg = 6.4322 kW/ft at 2817 MWt for Batch 17B, 17C2, 17D and 17E2 Mark-B-HTP fuel LHR vg = 6.4209 kW/ft at 2817 MWt for Batch 18A2, 18B and 18C Mark-B-HTP fuel LHR'vg= 6.4209 kW/ft at 2817 MWt for Batch 19 A -D Mark-B-HTP fuel P = ratio of THERMAL POWER / RATED THERMAL POWER Bu = fuel burnup (MWd/mtU)UO2 Fuel (Mark-B-HTP)

-All Batches LHRALLOw kW/ft(a)0 40,000 62,000 Core Elevation (ft) MWd/mtU MWd/mtU MWd/mtU 0 17.6 17.2 13.1 2.506 17.6 17.2 13.1 4.264 17.5 17.1 13.1 6.021 17.4 17.1 13.1 7.779 17.0 16.7 13.1 9.536 16.2 16.3 13.1 12.000 15.4 15.5 12.4 ( Linear interpolation for allowable LHR between specified burnup points is valid for these tables.

Davis-Besse Cycle 17 COLR Page 19 of 24 Revision 0 Table 6 (continued) 4 wt% Gad Fuel (Mark-B-HTP)

-All Batches LHRALL'w kW/ft(a)Core Elevation (ft)0 2.506 4.264 6.021 7.779 9.536 12.000 0 MWd/mtU 15.8 15.8 15.7 15.6 15.3 14.6 13.8 40,000 MWd/mtU 15.7 15.7 15.5 15.5 15.2 14.8 14.1 62,000 MWd/mtU 11.8 11.8 11.8 11.8 11.8 11.8 11.2 8 wt% Gad Fuel (Mark-B-HTP)

-Batches 17E2, 18A2, 18C, 19A and 19C LHRALLOw kW/ft(a)Core Elevation (ft)0 2.506 4.264 6.021 7.779 9.536 12.000 0 40,000 MWd/mtU MWd/mtU 14.9 14.9 14.9 14.9 14.8 14.9 14.8 14.9 14.4 14.5 13.7 14.2 13.0 13.5 62,000 MWd/mtU 11.0 11.0 11.0 11.0 11.0 11.0 10.4 (a) Linear interpolation for allowable LHR between specified burnup points is valid for these tables.

Davis-Besse Cycle 17 COLR Page 20 of 24 Revision 0 Table 7 Power Peaking Factors -FNAH This Table is referred to by Technical Specifications 3.2.5 Enthalpy Rise Hot Channel Factors -FNAH FNAH -MARP [1 + (1/RH) (1 -P/Pm)] (see note below)MARP = Maximum Allowable Radial Peak, see MARP Figures and data Tables P = THERMAL POWER / RATED THERMAL POWER and P < 1.0 Pm = 1.0 for 4-RCP operation Pm = 0.75 for 3-RCP operation 1/RH = 0.3 Note: The measured F N H shall be increased by 5.0% to account for measurement uncertainty prior to comparing to the limits.Figure 5 Maximum Allowable Radial Peak for FNAH in Mark-B-HTP Fuel Assemblies

• 2.1 -'U'U'U'U 0 2'U 2'U 2.0 +-1.9 1.8 1.7 1.6 1.5 1.4-----------

t------ ---*xfr.T~ I T I-/ .-1 -T~ L -I--1 -7 1 l i l l i F = 0.-~ -1 4 ---1.3 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Axial Peak* Linear interpolation is acceptable.

The MARP values are based on an active fuel height of 142.75 inches.

Davis-Besse Cycle 17 COLR Page 21 of 24 Revision 0 Table 8 Maximum Allowable Radial Peak for F NAH_ in Mark-B-HTP Fuel Assemblies Axial Axial Axial Height MARP Axial Height MARP Peak x/L (inches) Limit Peak x/L (inches) Limit 0.0 0.000 1.91828 0.0 0.000 1.81332 0.1 14.275 1.91912 0.1 14.275 1.72752 0.14 19.985 1.91916 0.14 19.985 1.70690 0.2 28.550 1.91893 0.2 28.550 1.75024 0.4 57.100 1.91727 0.4 57.100 1.78912 1.1 0.5 71.375 1.91659 1.6 0.5 71.375 1.81428 0.6 85.650 1.91652 0.6 85.650 1.75934 0.8 114.200 1.91726 0.8 114.200 1.59848 0.88 125.620 1.87428 0.88 125.620 1.53299 0.9 128.475 1.87570 0.9 128.475 1.53906 1.0 142.750 1.76005 1.0 142.750 1.43922 0.0 0.000 2.01903 0.1 14.275 2.01905 0.14 19.985 2.01902 0.2 28.550 2.01760 0.4 57.100 2.01566 1.2 0.5 71.375 2.01506 0.6 85.650 2.01472 0.8 114.200 1.86510 0.88 125.620 1.79631 0.9 128.475 1.79807 1.0 142.750 1.69236 0.0 0.000 2.12863 0.1 14.275 2.11181 0.14 19.985 2.09817 0.2 28.550 2.12998 0.4 57.100 2.12313 1.3 0.5 71.375 2.06182 0.6 85.650 1.97202 0.8 114.200 1.79424 0.88 125.620 1.72438 0.9 128.475 1.72615 1.0 142.750 1.62069 0.0 0.000 2.03596 0.1 14.275 1.96785 0.14 19.985 1.95126 0.2 28.550 1.99602 0.4 57.100 2.03723 1.4 0.5 71.375 1.98993 0.6 85.650 1.89829 0.8 114.200 1.72980 0.88 125.620 1.65869 0.9 128.475 1.66256 1.0 142.750 1.55477 0.0 0.000 1.91811 0.1 14.275 1.84228 0.14 19.985 1.82345 0.2 28.550 1.86637 0.4 57.100 1.90396 1.5 0.5 71.375 1.90467 0.6 85.650 1.82883 0.8 114.200 1.66024 0.88 125.620 1.59179 0.9 128.475 1.59788 1.0 142.750 1.49464 0.0 0.000 1.71924 0.1 14.275 1.62855 0.14 19.985 1.60598 0.2 28.550 1.64367 0.4 57.100 1.68971 1.7 0.5 71.375 1.71250 0.6 85.650 1.69234 0.8 114.200 1.53913 0.88 125.620 1.47793 0.9 128.475 1.48398 1.0 142.750 1.38831 0.0 0.000 1.63428 0.1 14.275 1.53965 0.14 19.985 1.51542 0.2 28.550 1.54992 0.4 57.100 1.60163 1.8 0.5 71.375 1.61867 0.6 85.650 1.62746 0.8 114.200 1.48433 0.88. 125.620 1.42669 0.9 128.475 1.43160 1.0 142.750 1.34126 0.0 0.000 1.55767 0.1 14.275 1.46097 0.14 19.985 1.43560 0.2 28.550 1.46745 0.4 57.100 1.52104 1.9 0.5 71.375 1.53278 0.6 85.650 1.54669 0.8 114.200 1.43258 0.88 125.620 1.37762 0.9 128.475 1.38298 1.0 142.750 1.29807 Davis-Besse Cycle 17 COLR Page 22 of 24 Revision 0 Figure 6 Flux-AFlux-Flow (or Power/Imbalance/Flow)

Allowable Values Davis-Besse 1 This Figure is referred to by Technical Specification 3.3.1-- -----(-17 .0110 o 0. )' -000 (17.0, 108.0) -- ---100-t-------(-30.6, 94.4)+--+ A (30.6, 77.1 )......T -EXAMPLE~-70-1-,---60,-

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--- -----* -30,--UACPAL-" ACCEPTABL UNCEPAL.... IO + OPERATION Z5 ---- --PUM -------60 40 20 -10 0 10 20 30 40 50 60 AXIAL POWER IMBALANCE, %The 3 pump example curve shows allowable values for an approximately 25% flow reduction for three pump operation (283,860 gpm). The actual setpoint will be calculated by the Reactor Protection System and will be directly proportional to the actual RC flow with three pumps.

Davis-Besse Cycle 17 COLR Page 23 of 24 Revision 0 Table 9 Refuelina Boron Concentration Limit This limit is referred to by Technical Specifications 3.9.1 The minimum required boron concentration for use during refueling shall be sufficient to ensure a Keff of 0.95 or less, plus an additional 1% Ak/k conservatism allowance for uncertainties.

Davis-Besse Cycle 17 COLR Page 24 of 24 Revision 0 Figure 7 Control Rod Core Locations and Group Assignments Davis-Besse 1 This Figure is referred to by Technical Requirements Manual 8.1.3 (X)4- N 1 3 4 5 6 1 7 1 8 1 9 1 111 2 I I I I I I I 4 6 4 Ill 4 6 4 13 14 15 I- B-C ID 21 E 2 5 5 1i1-7 1iI8 1 i7 18 1117 2 5 5 (W)4 8 6 3 6 8 4 5 1 1 5 6 7 3 4 3 7 6 5 1 1 5 4 8 6 3 6 8 4-F-G-H-K-L (Y)2 5 5 7 28 7 8 2 M--N 0 P 2 5 5 2 4 6 4 r%Group Number Group No of Rods 1 4 2 8 3 4 4 9 (Z)Function Safety Safety Safety Safety Total Group 5 6 7 8 No of Rods 12 8 8 8 61 Function Control Control Control APSR