1CAN121804, Core Operating Limits Report (COLR) Cycle 28 COLR, Revision 2

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Core Operating Limits Report (COLR) Cycle 28 COLR, Revision 2
ML18353A274
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 12/19/2018
From: Pyle S
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
1CAN121804
Download: ML18353A274 (33)
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Text

Entergy Operations, Inc.

1448 S.R. 333 Russellville, AR 72802 Tel 479-858-4704 Stephenie L. Pyle Manager, Regulatory Assurance Arkansas Nuclear One 1CAN121804 December 19, 2018 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555

SUBJECT:

ANO-1 Cycle 28 COLR, Revision 2 Arkansas Nuclear One, Unit 1 Docket No. 50-313 License No. DPR-51

Dear Sir or Madam:

Entergy Operations, Inc. (Entergy) Arkansas Nuclear One, Unit 1 (ANO-1) Technical Specification 5.6.5 requires the submittal of the Core Operating Limits Report (COLR) upon issuance for each reload cycle. Attached is Revision 2 of the ANO-1 Cycle 28 COLR. Please note that the latest approved revision number of the Babcock and Wilcox Topical Report BAW-10179P-A is identified in the COLR as Revision 9, November 2017. In addition, the approved revision number of the Entergy Reactor Physics Methods Report is identified in the COLR as Revision 0, December 1993.

Revision 0 of the ANO-1 Cycle 28 COLR was prepared prior to the core offload associated with refueling outage 1R27, but was not issued to the Control Room since a revision would be required if any fuel assemblies required reconstitution following inspection. Following core offload, the fuel inspection did identify assemblies that required reconstitution and the COLR was updated accordingly (Revision 1). Therefore, the only version issued during 1R27 was Revision 1 of the ANO-1 Cycle 28 COLR. Note that the only difference between the two revisions involved a change to the supporting engineering reference documents. No values or limits changed between the Revision 0 and Revision 1 versions.

The enclosed Revision 2 of the ANO-1 Cycle 28 COLR addresses a disconnected Axial Power Shaping Rod (APSR) in core location D10. The Cycle 28 reload analysis was revised to document any changes in nuclear, thermal-hydraulic, and mechanical design of the reactor core given an uncoupled APSR. No core operating limits, protective limits, or trip setpoints contained in Revision 1 of the ANO-1 COLR required revision. The re-analysis indicated that all fuel design limits continued to be met. The Revision 2 COLR changes update References 3 and 4 in Section 2.0 and annotate the existence of a disconnected APSR on Page 14 of the COLR.

1CAN121804 Page 2 of 2 This completes the reporting requirement for the referenced specification. This submittal contains no regulatory commitments. Should you have any questions, please contact me.

Sincerely, ORIGINAL SIGNED BY STEPHENIE L. PYLE SLP/dbb

Enclosure:

ANO-1 Cycle 28 Core Operating Limits Report (COLR), Revision 2 cc: Mr. Kriss M. Kennedy Regional Administrator U. S. Nuclear Regulatory Commission RGN-IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 NRC Senior Resident Inspector Arkansas Nuclear One P. O. Box 310 London, AR 72847 U. S. Nuclear Regulatory Commission Attn: Mr. Thomas Wengert MS O-08B1 One White Flint North 11555 Rockville Pike Rockville, MD 20852 Mr. Bernard R. Bevill Arkansas Department of Health Radiation Control Section 4815 West Markham Street Slot #30 Little Rock, AR 72205

Enclosure to 1CAN121804 ANO-1 Cycle 28 Core Operating Limits Report (COLR), Revision 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 ENTERGY OPERATIONS ARKANSAS NUCLEAR ONE UNIT ONE CYCLE 28 CORE OPERATING LIMITS REPORT ANO-1 1 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 1.0 CORE OPERATING LIMITS This Core Operating Limits Report for ANO-1 Cycle 28 has been prepared in accordance with the requirements of Technical Specification 5.6.5 with applicable 10 CFR 50.46 reporting. The core operating limits have been developed using the methodology provided in the references.

The following cycle-specific core operating limits are included in this report:

1) 2.1.1.3 Variable Low RCS Pressure - Temperature Protective Limits
2) 3.1.1 SHUTDOWN MARGIN (SDM)
3) 3.1.8 PHYSICS TESTS Exceptions - MODE 1
4) 3.1.9 PHYSICS TEST Exceptions - MODE 2
5) 3.2.1 Regulating Rod Insertion Limits
6) 3.2.2 AXIAL POWER SHAPING RODS (APSR) Insertion Limits
7) 3.2.3 AXIAL POWER IMBALANCE Operating Limits
8) 3.2.4 QUADRANT POWER TILT (QPT)
9) 3.2.5 Power Peaking
10) 3.3.1 Reactor Protection System (RPS) Instrumentation
11) 3.4.1 RCS Pressure, Temperature, and Flow DNB Limits
12) 3.4.4 RCS Loops - MODES 1 and 2
13) 3.9.1 Boron Concentration

2.0 REFERENCES

1. "Safety Criteria and Methodology for Acceptable Cycle Reload Analyses," BAW-10179P-A, Rev. 9, Framatome ANP, Inc., Lynchburg, Virginia, November 2017.
2. "Qualification of Reactor Physics Methods for the Pressurized Water Reactors of the Entergy System," ENEAD-01-P, Rev. 0, Entergy Operations, Inc., Jackson, Mississippi, December 1993.
3. Transmittal of ANO-1 Cycle 28 Revised Limits and Setpoints, Framatome Doc. No.

FS1-0035323-2.0, November 8, 2018.

4. ARKANSAS NUCLEAR ONE, UNIT 1, Cycle 28 Reload Report, ANP-3637, Rev. 3, November 2018, (CALC-ANO1-NE-17-00002, Revision 2).
5. ANO-1 Cycle 28 Core Loading Plan, Framatome document no. FS1-0033703 Revision 3.0, April 13, 2018, (CALC-ANO1-NE-18-00001, Revision 1).
6. IC (Initial Condition) DNB RCS Protection Criteria, CALC-96-E-0023-02, Rev. 7.
7. Arkansas Nuclear One, Unit 1, Cycle 28 Revised Reload Technical Document (RTD),

Framatome Letter FS1-0035802-2.0, March 2, 2018, (CALC-ANO1-NE-17-00001).

8. Special Report, Licensee Event Report 50-313/2014-002-00, Arkansas Nuclear One, Unit 1, Docket No. 50-313, License No. DPR-51, 1CAN121405, December 22, 2014.
9. Arkansas Nuclear One, Unit No. 1 - Closure Evaluation for Report Pursuant to 10 CFR 50.46 Requirements Relating to Effects of Thermal Conductivity Degradation (TAC No. MF5545), 1CNA081502, August 21, 2015.

ANO-1 2 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Table of Contents Page REACTOR CORE SAFETY LIMITS Fig. 1 Variable Low RCS Pressure-Temperature Protective Limits................................. 5 Fig. 2 AXIAL POWER IMBALANCE Protective Limits..................................................... 6 SHUTDOWN MARGIN (SDM) ...................................................................................................... 7 REGULATING ROD INSERTION LIMITS Fig. 3-A Regulating Rod Insertion Limits for Four-Pump Operation From 0 to 200 10 EFPD...................................................................................... 8 Fig. 3-B Regulating Rod Insertion Limits for Four-Pump Operation From 200 10 EFPD to EOC ............................................................................... 9 Fig. 4-A Regulating Rod Insertion Limits for Three-Pump Operation From 0 to 200 10 EFPD ................................................................................... 10 Fig. 4-B Regulating Rod Insertion Limits for Three-Pump Operation From 200 10 EFPD to EOC ............................................................................. 11 Fig. 5-A Regulating Rod Insertion Limits for Two-Pump Operation From 0 to 200 10 EFPD ................................................................................... 12 Fig. 5-B Regulating Rod Insertion Limits for Two-Pump Operation From 200 10 EFPD to EOC ............................................................................. 13 AXIAL POWER SHAPING RODS (APSR) INSERTION LIMITS ............................................... 14 AXIAL POWER IMBALANCE OPERATING LIMITS Fig. 6-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 0 EFPD to EOC ....................................................... 15 Fig. 6-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Four-Pump Operation from 0 EFPD to EOC .................................................. 16 Fig. 6-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 0 EFPD to EOC ....................................................... 17 Fig. 7-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 0 EFPD to EOC ..................................................... 18 Fig. 7-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Three-Pump Operation from 0 EFPD to EOC ................................................ 19 Fig. 7-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 0 EFPD to EOC ..................................................... 20 Fig. 8-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Two-Pump Operation from 0 EFPD to EOC ........................................................ 21 Fig. 8-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Two-Pump Operation from 0 EFPD to EOC................................................... 22 Fig. 8-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Two-Pump Operation from 0 EFPD to EOC ........................................................ 23 QUADRANT POWER TILT LIMITS AND SETPOINTS ............................................................. 24 ANO-1 3 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 POWER PEAKING FACTORS Fig. 9A LOCA Linear Heat Rate Limits for Mark-B-HTP Fuel .......................................... 25 DNB Power Peaking Factors ............................................................................................... 26 REACTOR PROTECTION SYSTEM (RPS) INSTRUMENTATION Fig. 10 RPS Maximum Allowable Setpoints for Axial Power Imbalance ......................... 27 Fig. 11 RPS Variable Low Pressure Temperature Envelope Setpoints .......................... 28 RCS PRESSURE, TEMPERATURE, AND FLOW DNB SURVEILLANCE LIMITS .................. 29 RCS LOOPS MODE 1 AND 2 .................................................................................................... 30 REFUELING BORON CONCENTRATION ................................................................................ 30 ANO-1 4 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 FIGURE 1 Variable Low RCS Pressure - Temperature Protective Limits (Figure is referred to by Technical Specification 2.1.1.3) 2300 3-PUMP 2200 4-PUMP Core Outlet Pressure, psig 2100 2000 1900 1 PUMP EACH LOOP 1800 1700 590 600 610 620 630 640 650 Reactor Coolant Outlet Temperature, °F PUMPS OPERATING (TYPE OF LIMIT) GPM* POWER**

FOUR PUMPS (DNBR LIMIT) 383,680 (100%) 110%

THREE PUMPS (DNBR LIMIT) 284,307 (74.1%) 89%

ONE PUMP IN EACH LOOP (DNBR LIMIT) 188,003 (49%) 62.2%

  • 109% OF DESIGN FLOW (2.5% UNCERTAINTY INCLUDED IN STATISTICAL DESIGN LIMIT)
    • AN ADDITIONAL 2% POWER UNCERTAINTY IS INCLUDED IN STATISTICAL DESIGN LIMIT ANO-1 5 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 2 AXIAL POWER IMBALANCE PROTECTIVE LIMITS (measurement system independent)

(Figure is referred to by Technical Specification 2.1.1 Bases) 120

(-47.3, 112.0) (44.6, 112.0)

(-55.1, 101.4) ACCEPTABLE (56.3, 101.4) 100 4 PUMP OPERATION

(-47.3, 87.6) (44.6, 87.6) 80

(-55.1, 77.0) (56.3, 77.0)

ACCEPTABLE 3 AND 4 PUMP OPERATION

(-47.3, 61.0) (44.6, 61.0) 60

(-55.1, 50.4) The three- or two-pump (56.3, 50.4) example setpoint Thermal Power Level %

curves show allowable values for an 40 ACCEPTABLE approximate 26% and 2, 3 AND 4 PUMP 51% flow reduction for OPERATION three- and two-pump operation respectively.

The actual setpoint curve will be calculated by the Reactor 20 Protection System and will be directly proportional to the indicated flow.

(-55.1, 0.0) 0 (56.3, 0.0)

-70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 Axial Power Imbalance, %

ANO-1 6 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 SHUTDOWN MARGIN (SDM)

(Limits are referred to by Technical Specifications 3.1.1, 3.1.4, 3.1.5, 3.1.8, 3.1.9, and 3.3.9)

Verify SHUTDOWN MARGIN per the table below.

REQUIRED TECHNICAL APPLICABILITY SHUTDOWN SPECIFICATION MARGIN REFERENCE MODE 1* 1 %k/k 3.1.4, 3.1.5 MODE 2* 1 %k/k 3.1.4, 3.1.5, 3.3.9 MODE 3 1 %k/k 3.1.1, 3.3.9 MODE 4 1 %k/k 3.1.1, 3.3.9 MODE 5 1 %k/k 3.1.1, 3.3.9 MODE 1 PHYSICS TESTS Exceptions** 1 %k/k 3.1.8 MODE 2 PHYSICS TESTS Exceptions 1 %k/k 3.1.9

    • Entry into Mode 1 Physics Tests Exceptions is not supported by existing analyses and as such requires actual shutdown margin to be 1 %k/k.

ANO-1 7 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 3-A Regulating Rod Insertion Limits for Four-Pump Operation From 0 to 200 10 EFPD (Figure is referred to by Technical Specification 3.2.1) 110.0 (264.1, 102) 100.0 (98.3, 102)

(300.0, 102) 90.0 OPERATION IN THIS (248.5, 90)

REGION IS NOT 80.0 ALLOWED (248.5, 78)

OPERATION Power, % of 2568 MWt 70.0 SHUTDOWN RESTRICTED MARGIN 60.0 LIMIT (59.5, 58) (206.5, 58) 50.0 40.0 PERMISSIBLE 30.0 OPERATING REGION 20.0 (28.5, 20) 10.0 (0.0, 9.6) 0.0 0 50 100 150 200 250 300 Rod Index, % Withdrawn 0 20 40 60 80 100 GROUP 7*

0 20 40 60 80 100 GROUP 6*

0 20 40 60 80 100 GROUP 5*

  • Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.

ANO-1 8 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 3-B Regulating Rod Insertion Limits for Four-Pump Operation From 200 10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.1) 110.0 (199.6, 102) (264.1, 102) 100.0 (300.0, 102) 90.0 OPERATION IN THIS (248.5, 90)

REGION IS NOT 80.0 ALLOWED OPERATION Power, % of 2568 MWt (248.5, 78)

RESTRICTED 70.0 60.0 (153.5, 58)

SHUTDOWN (206.5, 58) 50.0 MARGIN LIMIT 40.0 PERMISSIBLE 30.0 OPERATING REGION 20.0 (93.5, 20) 10.0 (0.0, 2.1) 0.0 0 50 100 150 200 250 300 Rod Index, % Withdrawn 0 20 40 60 80 100 GROUP 7*

0 20 40 60 80 100 GROUP 6*

0 20 40 60 80 100 GROUP 5*

  • Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.

ANO-1 9 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 4-A Regulating Rod Insertion Limits for Three-Pump Operation From 0 to 200 10 EFPD (Figure is referred to by Technical Specification 3.2.1) 110.0 100.0 90.0 OPERATION IN THIS 80.0 REGION IS NOT (264.7, 77)

Power, % of 2568 MWt ALLOWED (98.8, 77) 70.0 (300.0, 77)

OPERATION (248.5, 67) 60.0 RESTRICTED (248.5, 58)

SHUTDOWN 50.0 MARGIN LIMIT 40.0 (59.5, 43.5)

(206.5, 43) 30.0 PERMISSIBLE OPERATING 20.0 REGION 10.0 (28.5, 15)

(0.0, 7.2) 0.0 0 50 100 150 200 250 300 Rod Index, % Withdrawn 0 20 40 60 80 100 GROUP 7*

0 20 40 60 80 100 GROUP 6*

0 20 40 60 80 100 GROUP 5*

  • Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.

ANO-1 10 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 4-B Regulating Rod Insertion Limits for Three-Pump Operation From 200 10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.1) 110.0 100.0 90.0 80.0 (200.3, 77) (264.7, 77)

Power, % of 2568 MWt OPERATION IN THIS (300.0, 77) 70.0 REGION IS NOT (248.5, 67)

ALLOWED 60.0 OPERATION RESTRICTED (248.5, 58) 50.0 SHUTDOWN (153.5, 43.5)

MARGIN 40.0 LIMIT (206.5, 43) 30.0 PERMISSIBLE 20.0 (93.5, 15) OPERATING REGION 10.0 (0.0, 1.6) 0.0 0 50 100 150 200 250 300 Rod Index, % Withdrawn 0 20 40 60 80 100 GROUP 7*

0 20 40 60 80 100 GROUP 6*

0 20 40 60 80 100 GROUP 5*

  • Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.

ANO-1 11 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 5-A Regulating Rod Insertion Limits for Two-Pump Operation From 0 to 200 10 EFPD (Figure is referred to by Technical Specification 3.2.1) 110.0 100.0 90.0 80.0 Power, % of 2568 MWt OPERATION IN THIS 70.0 REGION IS NOT ALLOWED 60.0 (265.8, 52) 50.0 (100.0, 52)

SHUTDOWN (248.5, 44)

(300.0, 52) 40.0 MARGIN OPERATION (248.5, 38)

LIMIT RESTRICTED 30.0 (59.5, 29) PERMISSIBLE (206.5, 28) OPERATING 20.0 REGION 10.0 (0.0, 4.8) (28.5, 10) 0.0 0 50 100 150 200 250 300 Rod Index, % Withdrawn GROUP 7*

0 20 40 60 80 100 GROUP 6*

0 20 40 60 80 100 GROUP 5*

  • Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.

ANO-1 12 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 5-B Regulating Rod Insertion Limits for Two-Pump Operation From 200 10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.1) 110.0 100.0 90.0 80.0 Power, % of 2568 MWt 70.0 OPERATION IN THIS 60.0 REGION IS NOT (265.8, 52)

(201.7, 52)

ALLOWED 50.0 (300.0, 52)

(248.5, 44) 40.0 SHUTDOWN OPERATION (153.5, 29) RESTRICTED (248.5, 38)

MARGIN 30.0 LIMIT (206.5, 28) 20.0 (93.5, 10) PERMISSIBLE 10.0 OPERATING (0.0, 1.1)

REGION 0.0 0 50 100 150 200 250 300 Rod Index, % Withdrawn 0 20 40 60 80 100 GROUP 7*

0 20 40 60 80 100 GROUP 6*

0 20 40 60 80 100 GROUP 5*

  • Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.

ANO-1 13 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 AXIAL POWER SHAPING RODS (APSR) INSERTION LIMITS (Limits referred to by Technical Specification 3.2.2)(a)

Up to 472 +/- 10 EFPD, the APSRs, excluding the disconnected APSR in core location D10, may be positioned as necessary for transient imbalance control. However, the APSRs, excluding the disconnected APSR in core location D10, shall be fully withdrawn by 482 EFPD. After the APSR withdrawal at 472 +/- 10 EFPD, the APSRs, excluding the disconnected APSR in core location D10, shall not be reinserted, except during the end of cycle shutdown when the reactor power is equal to, or less than, 30% FP.

(a)

The APSR in core location D10 is disconnected.

ANO-1 14 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 6-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0

(-20.17, 102) (18.62, 102) 100.0

(-26.68, 92) (25.23, 92) 90.0

(-33.70, 80) 80.0 (32.83, 80) 70.0

(-33.94, 60) 60.0 (33.07, 60)

PERMISSIBLE PERMISSIBLE OPERATING 50.0 OPERATING REGION REGION RESTRICTED RESTRICTED REGION REGION 40.0 Power, % of 2568 MWt 30.0 20.0 10.0

(-33.94, 0) (33.07, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP ANO-1 15 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 6-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Four-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0

(-12.14, 102) (10.80, 102) 100.0

(-18.04, 92) (16.78, 92) 90.0

(-24.42, 80) 80.0 (23.67, 80) 70.0

(-25.27, 60) 60.0 (24.52, 60)

PERMISSIBLE PERMISSIBLE OPERATING 50.0 OPERATING REGION REGION RESTRICTED RESTRICTED REGION REGION 40.0 Power, % of 2568 MWt 30.0 20.0 10.0

(-25.27, 0) (24.52, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP

  • Assumes that no individual long emitter detector affecting the minimum incore imbalance calculation exceeds 73% sensitivity depletion. The imbalance setpoints for the minimum incore system must be reduced to 2.8% FP at the earliest time-in-life this assumption is no longer valid.

ANO-1 16 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 6-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0

(-14.08, 102) (12.48, 102) 100.0

(-20.53, 92) (19.03, 92) 90.0

(-27.50, 80) 80.0 (26.57, 80) 70.0

(-28.19, 60) 60.0 (27.28, 60)

PERMISSIBLE PERMISSIBLE OPERATING 50.0 OPERATING REGION REGION RESTRICTED RESTRICTED REGION REGION 40.0 Power, % of 2568 MWt 30.0 20.0 10.0

(-28.19, 0) (27.28, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP ANO-1 17 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 7-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0

(-20.47, 77) (18.92, 77)

(-26.96, 69) 70.0 (25.51, 69)

(-33.94, 60) 60.0 (33.07, 60)

PERMISSIBLE PERMISSIBLE OPERATING 50.0 OPERATING REGION REGION

(-34.12, 45) (33.25, 45) 40.0 Power, % of 2568 MWt RESTRICTED RESTRICTED REGION REGION 30.0 20.0 10.0

(-34.12, 0) (33.25, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP ANO-1 18 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 7-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Three-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0

(-13.02, 77) (11.67, 77)

(-18.84, 69) 70.0 (17.58, 69)

(-25.12, 60) 60.0 (24.37, 60)

PERMISSIBLE PERMISSIBLE OPERATING 50.0 OPERATING REGION REGION

(-25.80, 45) (25.04, 45) 40.0 Power, % of 2568 MWt RESTRICTED RESTRICTED REGION REGION 30.0 20.0 10.0

(-25.80, 0) (25.04, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP

  • Assumes that no individual long emitter detector affecting the minimum incore imbalance calculation exceeds 73% sensitivity depletion. The imbalance setpoints for the minimum incore system must be reduced to 2.8% FP at the earliest time-in-life this assumption is no longer valid.

ANO-1 19 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 7-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0

(-14.95, 77) (13.36, 77)

(-21.32, 69) 70.0 (19.84, 69)

(-28.19, 60) 60.0 (27.28, 60)

PERMISSIBLE PERMISSIBLE OPERATING 50.0 OPERATING REGION REGION

(-28.69, 45) (27.79, 45) 40.0 Power, % of 2568 MWt RESTRICTED RESTRICTED REGION REGION 30.0 20.0 10.0

(-28.69, 0) (27.79, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP ANO-1 20 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 8-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Two-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0 70.0 60.0

(-20.77, 52) (19.22, 52) 50.0

(-27.23, 46) (25.78, 46)

(-34.18, 40) 40.0 (33.31, 40)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION REGION Power, % of 2568 MWt

(-34.30, 30) 30.0 (33.43, 30)

RESTRICTED 20.0 RESTRICTED REGION REGION 10.0

(-34.30, 0) (33.43, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP ANO-1 21 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 8-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Two-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0 70.0 60.0

(-13.89, 52) (12.55, 52) 50.0

(-19.45, 46) (18.19, 46)

(-25.62, 40) 40.0 (24.87, 40)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION REGION

(-26.32, 30) (25.57, 30)

Power, % of 2568 MWt 30.0 RESTRICTED 20.0 RESTRICTED REGION REGION 10.0

(-26.32, 0) (25.57, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP

  • Assumes that no individual long emitter detector affecting the minimum incore imbalance calculation exceeds 73% sensitivity depletion. The imbalance setpoints for the minimum incore system must be reduced to 2.8% FP at the earliest time-in-life this assumption is no longer valid.

ANO-1 22 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 8-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Two-Pump Operation from 0 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0 70.0 60.0

(-15.78, 52) (14.20, 52) 50.0

(-22.09, 46) (20.62, 46)

(-28.86, 40) PERMISSIBLE 40.0 PERMISSIBLE (27.96, 40)

OPERATING OPERATING REGION REGION

(-29.18, 30) (28.29, 30)

Power, % of 2568 MWt 30.0 RESTRICTED 20.0 RESTRICTED REGION REGION 10.0

(-29.18, 0) (28.29, 0) 0.0

-50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 Axial Power Imbalance, %FP ANO-1 23 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Quadrant Power Tilt Limits And Setpoints (Limits are referred to by Technical Specification 3.2.4)

From 0 EFPD to EOC Measurement System Steady State Value (%) Maximum Value (%)

60 % FP > 60 % FP Full In-core Detector System Setpoint 6.83 5.50 25.00 Minimum In-core Detector System Setpoint 2.78* 1.90* 25.00 Ex-core Power Range NI Channel Setpoint 4.05 1.96 25.00 Measurement System Independent Limit 7.50 4.92 25.00

  • Assumes that no individual long emitter detector affecting the minimum in-core tilt calculation exceeds 73% sensitivity depletion. The setpoint must be reduced to 1.50% (power levels

> 60% FP) and to 2.19% (power levels 60% FP) at the earliest time-in-life that this assumption is no longer valid.

ANO-1 24 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 9A LOCA Linear Heat Rate Limits for Mark-B-HTP Fuel (Figure is referred to by Technical Specification 3.1.8 and 3.2.5)

Allowable LOCA LHR Limits LHR Limit for LHR Limit for LHR Limit for Core Elevation, ft 34,000 MWd/mtU, 62,000 MWd/mtU, 0 MWd/mtU, kW/ft kW/ft kW/ft 0.000 16.10 14.10 11.80 2.506 17.00 15.00 12.50 4.264 17.20 15.20 12.50 6.021 17.30 15.30 12.50 7.779 17.40 15.40 12.50 9.536 17.10 15.10 12.50 12.000 16.20 14.20 11.80 Note: The LOCA LHR limits may be linearly interpolated as a function of burnup between 0 MWd/mtU and 34,000 MWd/mtU, between 34,000 MWd/mtU and 62,000 MWd/mtU, and as a function of core elevation.

ANO-1 25 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 DNB Power Peaking Factors (Limits are referred to by Technical Specification 3.1.8 and 3.2.5)

The following total power peaking factors define the Maximum Allowable Peaking (MAP) limits to protect the initial conditions assumed in the DNB Loss of Flow transient analysis. The total power peaking factors for IC-DNB 4-pump and 3-pump are identical; hence one set of IC-DNB values are provided for both 4-pump and 3-pump operation.

IC-DNB Total Power Peaking Factors Mark-B-HTP Axial Axial Axial x/L IC MAP Limits x/L IC MAP Limits x/L IC MAP Limits Peak Peak Peak 0.01 2.04426 0.01 2.94000 0.01 3.20469 0.14 2.04515 0.14 2.94000 0.14 3.20469 0.20 2.04535 0.20 2.93545 0.20 3.15423 0.30 2.04551 0.30 2.84715 0.30 3.08083 0.40 2.04470 0.40 2.76077 0.40 2.98064 1.1 0.50 2.04437 1.4 0.50 2.66671 1.7 0.50 2.89369 0.60 2.04415 0.60 2.55808 0.60 2.78037 0.70 2.04400 0.70 2.46508 0.70 2.68552 0.80 2.04329 0.80 2.34973 0.80 2.56207 0.89 2.00109 0.89 2.27714 0.89 2.49021 0.99 1.90427 0.99 2.18525 0.99 2.39515 0.01 2.33088 0.01 3.08066 0.01 3.24949 0.14 2.33287 0.14 3.08066 0.14 3.24949 0.20 2.33339 0.20 3.03513 0.20 3.20303 0.30 2.33352 0.30 2.93856 0.30 3.13047 0.40 2.33338 0.40 2.84115 0.40 3.04037 1.2 0.50 2.33285 1.5 0.50 2.75216 1.8 0.50 2.95027 0.60 2.33232 0.60 2.63946 0.60 2.84225 0.70 2.26721 0.70 2.54429 0.70 2.74696 0.80 2.16931 0.80 2.42655 0.80 2.62489 0.89 2.10460 0.89 2.35382 0.89 2.55373 0.99 2.00767 0.99 2.26040 0.99 2.45882 0.01 2.64464 0.01 3.14861 0.01 3.28611 0.14 2.64863 0.14 3.14861 0.14 3.28611 0.20 2.64909 0.20 3.09918 0.20 3.24461 0.30 2.64997 0.30 3.01573 0.30 3.17163 0.40 2.64949 0.40 2.91490 0.40 3.08589 1.3 0.50 2.56272 1.6 0.50 2.82718 1.9 0.50 3.00025 0.60 2.46600 0.60 2.71210 0.60 2.89826 0.70 2.37484 0.70 2.61653 0.70 2.80288 0.80 2.26452 0.80 2.49634 0.80 2.68386 0.89 2.19471 0.89 2.42370 0.89 2.61261 0.99 2.09988 0.99 2.32955 0.99 2.51792 Notes

1. The values above are not error corrected.
2. The values above were generated using SCD methods which incorporate a 3.8% radial peak uncertainty in the DNBR design limit. Therefore, the above IC MAP limits can be compared to predicted peaks without the addition of up to 3.8% in radial peak calculation uncertainty. These limits, however, do not incorporate any grid bias uncertainty.
3. The present T-H methodology allows for an increase in the design radial-local peak for power levels below 100% full power.

The equations defining the multipliers are as follows:

P/Pm = 1.00 P/Pm < 1.00 MAP Multiplier 1.0 1 + 0.3(1 - P/Pm)

Where P = core power fraction, and Pm = 1.00 for 4-pump operation, or

= 0.75 for 3-pump operation ANO-1 26 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 10 Reactor Protection System Maximum Allowable Setpoints for Axial Power Imbalance (Figure is referred to by Technical Specification 3.3.1 and Technical Specification Bases 2.1.1) 120

(-34.0, 107.0) (30.0, 107.0) 100 ACCEPTABLE

(-44.0, 92.5) 4 PUMP (45.0, 92.5)

OPERATION

(-34.0, 79.3) (30.0, 79.3) 80 ACCEPTABLE 3 AND 4 PUMP

(-44.0, 64.8) OPERATION (45.0, 64.8) 60

(-34.0, 52.4) (30.0, 52.4)

ACCEPTABLE The three- or two-pump example 2, 3 AND 4 PUMP 40 setpoint curves show

(-44.0, 37.9) OPERATION allowable values for an (45.0, 37.9) approximate 26% and 51% flow reduction for Thermal Power Level %

three- and two-pump operation respectively.

The actual setpoint curve will be 20 calculated by the Reactor Protection System and will be directly proportional to the indicated flow.

(-44.0, 0.0) 0 (45.0, 0.0)

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 Axial Power Imbalance, %

Flux / Flow Setpoint

(% Power / % Flow)

Four Pump Operation 1.07 Three Pump Operation 1.07 Two Pump Operation 1.07 ANO-1 27 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 Figure 11 Reactor Protection System Variable Low Pressure Temperature Envelope Setpoints (Figure is referred to by Technical Specification 3.3.1) 2400 618, 2355 560, 2355 2200 Reactor Coolant Pressure, psig ACCEPTABLE OPERATION 2000 618, 1980 P = 16.25 Tout - 8063, psig UNACCEPTABLE OPERATION 1800 560, 1800 606.9, 1800 1600 560 580 600 620 640 660 Reactor Outlet Temperature, °F ANO-1 28 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 RCS Pressure, Temperature, and Flow DNB Surveillance Limits (Limit is referred to by Technical Specification 3.4.1)

Four-Pump Three-Pump Two-Pump Operation Operation Operation 2081.2Note 4 Minimum RCS Hot Leg Pressure (psig) Note 1 2082.2 2118.1 2120.4Note 5 Maximum RCS Hot Leg Temperature (°F) Note 2 602.6 602.9 603.15 Note 6 Note 7 143.36 106.46 70.64 Note 8 Minimum RCS Total Flow (Mlbm/hr) Note 3 138.01 Note 9 102.45 Note 9 67.96 Note 9 Note 1 -- Using individual indications P1021, P1023, P1038 and P1039 (or equivalent) from the plant computer.

Note 2 -- Using individual indications T1011NR, T1014NR, T1039NR, T1042NR, T1012, T1013, T1040 and T1041 or averages TOUTA, XTOUTA, TOUTB, XTOUTB, TOUT, XTOUT from the plant computer.

Note 3 -- Using indication WRCFT (or equivalent) from the plant computer, and can be linearly interpolated between these values provided the Tave versus Power level curve is followed.

Note 4 -- Applies to the RCS loop with two RCPs operating.

Note 5 -- Applies to the RCS loop with one RCP operating.

Note 6 -- For Tcold = 556.57 °F.

Note 7 -- For Tcold = 556.3 °F.

Note 8 -- For Tcold = 556.1 °F.

Note 9 -- For Tcold = 580 °F.

ANO-1 29 Rev. 2

CYCLE 28 COLR CALC-ANO1-NE-18-00002, Revision 2 RCS Loops - Mode 1 and Mode 2 (Limit is referred to by Technical Specification 3.4.4)

Nominal Operating Power Level

(% Power)

Four Pump Operation 100 Three Pump Operation 75 Two Pump Operation* 49

Refueling Boron Concentration (Limit is referred to by Technical Specification 3.9.1)

The minimum required boron concentration (which includes uncertainties) for use during refueling is 2227 ppm.

ANO-1 30 Rev. 2

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