1CAN111104, Unit 1, ANO-1 Cycle 24 Core Operating Limits Report (Colr), Revision 2

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Unit 1, ANO-1 Cycle 24 Core Operating Limits Report (Colr), Revision 2
ML113290028
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 11/23/2011
From: Pyle S
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
1CAN111104
Download: ML113290028 (33)
v • d • e


Text

Entergy Operations, Inc.

1448 S.R. 333 Russellville, AR 72802 Tel 479-858-4704 Stephenie L. Pyle Manager, Licensing Arkansas Nuclear One 1CAN111104 November 23, 2011 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

ANO-1 Cycle 24 COLR, Revision 2 Arkansas Nuclear One - Unit 1 Docket No. 50-313 License No. DPR-51

References:

1. Entergy letter dated October 31, 2011, ANO-1 Cycle 24 COLR (1CAN101101)
2. Entergy letter dated November 11, 2011, ANO-1 Cycle 24 COLR, Revision 1 (1CAN111103)

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) for each reload cycle, including submittal of any revisions or supplements that may occur following initial issuance. Attached is Revision 2 of the ANO-1 Cycle 24 COLR.

During startup and power ascension from ANO-1 Refueling Outage 1R23 (Fall 2011), the quadrant power tilt was found to be slightly larger than anticipated, creating the possibility that the tilt may not remain within allowed steady state values for operation above 60% full power, as presented in the Cycle 24 COLR. Based on this condition, an additional reference and a change in the full incore detector system steady-state setpoint quadrant power tilt limit for operation above 60% full power within the Cycle 24 COLR was necessary. The revision increases the allowable tilt above 60% full power by using the available target margin from the previous calculations. No other information or limit in the COLR was affected.

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 8, May 2010. In addition, the approved revision number of the Entergy Reactor Physics Methods Report is identified in the COLR as Revision 0, December 1993. This completes the reporting requirement for the referenced specification.

1CAN111104 Page 2 of 2 This submittal contains no regulatory commitments. Should you have any questions, please contact me.

Sincerely, Original signed by Stephenie L. Pyle SLP/dbb

Attachment:

ANO-1 Cycle 24 Core Operating Limits Report (COLR), Revision 2 cc: Mr. Elmo E. Collins Regional Administrator U. S. Nuclear Regulatory Commission Region IV 612 Lamar Blvd., Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Arkansas Nuclear One P. O. Box 310 London, AR 72847 U. S. Nuclear Regulatory Commission Attn: Mr. Kaly Kalyanam MS O-8 B1 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

Attachment to 1CAN111104 ANO-1 Cycle 24 Core Operating Limits Report (COLR), Revision 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 ENTERGY OPERATIONS ARKANSAS NUCLEAR ONE UNIT ONE CYCLE 24 CORE OPERATING LIMITS REPORT ANO-1 1 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 1.0 CORE OPERATING LIMITS This Core Operating Limits Report for ANO-1 Cycle 24 has been prepared in accordance with the requirements of Technical Specification 5.6.5. 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. 8, Framatome ANP, Inc., Lynchburg, Virginia, May 2010.
2. Letter dated 4/9/02 from L.W. Barnett, USNRC, to J.M. Mallay, FRA-ANP, Safety Evaluation of Framatome Technologies Topical Report BAW-10164P Revision 4, RELAP5/MOD2- B&W, An Advanced Computer Program for Light Water Reactor LOCA and Non-LOCA Transient Analysis (TAC Nos. MA8465 and MA8468), USNRC ADAMS Accession Number ML013390204.
3. RELAP5/MOD2-B&W - An Advanced Computer Program for Light Water Reactor LOCA Transient Analysis, BAW-10164PA, Rev. 6, Framatome Technologies, Inc., Lynchburg, Virginia, June 2007.
4. "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.
5. ANO-1 Cycle 24 Limits and Setpoints, Areva Doc. No. 86-9158676-000, July 27, 2011.
6. Arkansas Nuclear One, Unit 1, Cycle 24 Reload Report, ANP-3033, Rev. 1, November, 2011 (CALC-ANO1-NE-11-00001).
7. ANO-1 Refueling Boron for 1R23, CALC-NEAD-SR-11/016, Rev. 0.
8. IC (Initial Condition) DNB RCS Protection Criteria, CALC-96-E-0023-02, Rev. 7.
9. Arkansas Nuclear One Unit 1, Cycle 24 Reload Technical Document (RTD), Areva Doc.

No. 51-9165384-000, October, 2011 (CALC-ANO1-NE-11-00003).

10. ANO-1 Cycle 24 Increased Quadrant Power Tilt Setpoint for Greater than 60% FP, Areva Doc. No. 86-9172947-000, November, 2011.

ANO-1 2 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 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 to EOC.................................................................. 15 Fig. 6-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Four-Pump Operation from 0 to EOC............................................................. 16 Fig. 6-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 0 to EOC.................................................................. 17 Fig. 7-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 0 to EOC................................................................ 18 Fig. 7-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Three-Pump Operation from 0 to EOC........................................................... 19 Fig. 7-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 0 to EOC................................................................ 20 Fig. 8-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Two-Pump Operation from 0 to EOC .................................................................. 21 Fig. 8-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Two-Pump Operation from 0 to EOC ............................................................. 22 Fig. 8-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Two-Pump Operation from 0 to EOC .................................................................. 23 QUADRANT POWER TILT LIMITS AND SETPOINTS ............................................................. 24 ANO-1 3 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 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 24 COLR CALC-ANO1-NE-11-00002 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 24 COLR CALC-ANO1-NE-11-00002 Figure 2 AXIAL POWER IMBALANCE Protective Limits (measurement system independent)

(Figure is referred to by Technical Specification 2.1.1 Bases) 120 (47.49, 112.0)

(-46.73, 112.0)

(57.98, 104.70)

(-58.84, 102.21) ACCEPTABLE 100 4 PUMP OPERATION (47.49, 87.40)

(-46.73, 87.40) 80 (57.98, 80.10)

(-58.84, 77.61)

ACCEPTABLE 3 AND 4 PUMP OPERATION (47.49, 61.20)

(-46.73, 61.20) 60 (57.98, 53.90)

(-58.84, 51.41)

The three- or two-pump example setpoint Thermal Power Level %

curves show allowable values for an 40 ACCEPTABLE approximate 25% and 2, 3 AND 4 PUMP 49% 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.

(-58.84, 0.0) (57.98, 0.0) 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 24 COLR CALC-ANO1-NE-11-00002 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 24 COLR CALC-ANO1-NE-11-00002 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) 110.0 100.0 (142.9, 102) (264.1, 102)

(300.0, 102)

OPERATION IN THIS 90.0 REGION IS NOT (248.5, 90)

ALLOWED 80.0 OPERATION (248.5, 78)

Power, % of 2568 MWt RESTRICTED 70.0 SHUTDOWN 60.0 MARGIN (89.5, 58)

LIMIT (206.5, 58) 50.0 40.0 PERMISSIBLE 30.0 OPERATING REGION 20.0 (51.5, 20) 10.0 (0.0, 3.9) 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 24 COLR CALC-ANO1-NE-11-00002 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) 110.0 100.0 (206.3, 102) (264.1, 102)

(300.0, 102)

OPERATION IN THIS (248.5, 90) 90.0 REGION IS NOT 80.0 ALLOWED OPERATION (248.5, 78)

Power, % of 2568 MWt RESTRICTED 70.0 60.0 (166.5, 58)

SHUTDOWN (206.5, 58) 50.0 MARGIN LIMIT 40.0 PERMISSIBLE 30.0 OPERATING REGION 20.0 (96.5, 20) 10.0 (0.0, 1.4) 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 24 COLR CALC-ANO1-NE-11-00002 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 (143.7, 77) (264.7, 77)

Power, % of 2568 MWt ALLOWED (300.0, 77) 70.0 OPERATION (248.5, 67)

RESTRICTED 60.0 (248.5, 58)

SHUTDOWN 50.0 MARGIN LIMIT (89.5, 43.5) 40.0 (206.5, 43) 30.0 PERMISSIBLE OPERATING 20.0 REGION (51.5, 15) 10.0 (0.0, 2.9) 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 24 COLR CALC-ANO1-NE-11-00002 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 (206.9, 77) (264.7, 77)

Power, % of 2568 MWt 70.0 OPERATION IN THIS (300.0, 77)

REGION IS NOT (248.5, 67) 60.0 ALLOWED OPERATION RESTRICTED (248.5, 58) 50.0 SHUTDOWN (166.5, 43.5)

MARGIN 40.0 (206.5, 43)

LIMIT 30.0 PERMISSIBLE 20.0 OPERATING (96.5, 15)

REGION 10.0 (0.0, 1.1) 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 11 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 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 (145.4, 52) (265.8, 52) 50.0 SHUTDOWN (248.5, 44) (300.0, 52)

MARGIN OPERATION 40.0 RESTRICTED (248.5, 38)

LIMIT 30.0 (89.5, 29) PERMISSIBLE (206.5, 28) OPERATING 20.0 REGION 10.0 (0.0, 2.0)

(51.5, 10) 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 12 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 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 ALLOWED (208.1, 52) (265.8, 52) 50.0 (248.5, 44) (300.0, 52) 40.0 OPERATION SHUTDOWN (248.5, 38)

RESTRICTED MARGIN (166.5, 29) 30.0 LIMIT (206.5, 28) 20.0 PERMISSIBLE (96.5, 10) OPERATING 10.0 REGION (0.0, 0.7) 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 24 COLR CALC-ANO1-NE-11-00002 AXIAL POWER SHAPING RODS (APSR) INSERTION LIMITS (Figure is referred to by Technical Specification 3.2.2)

Up to 436 +/- 10 EFPD, the APSRs may be positioned as necessary for transient imbalance control. However, the APSRs shall be fully withdrawn by 446 EFPD. After the APSR withdrawal at 436 +/- 10 EFPD, the APSRs shall not be reinserted, except prior to end of cycle shutdown when the reactor power is equal to, or less than, 30% FP.

ANO-1 14 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 Figure 6-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0

(-25.14, 102) (22.87, 102) 100.0

(-29.50, 92) (32.83, 92) 90.0

(-35.94, 80) 80.0 (33.40, 80) 70.0

(-36.16, 60) 60.0 (33.65, 60)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION 50.0 REGION RESTRICTED RESTRICTED REGION REGION 40.0 Power, % of 2568 MWt 30.0 20.0 10.0 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 24 COLR CALC-ANO1-NE-11-00002 Figure 6-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Four-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0

(-16.50, 102) (14.52, 102) 100.0

(-20.53, 92) (23.38, 92) 90.0

(-26.42, 80) 80.0 (24.32, 80) 70.0

(-27.12, 60) 60.0 (25.02, 60)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION 50.0 REGION RESTRICTED RESTRICTED REGION REGION 40.0 Power, % of 2568 MWt 30.0 20.0 10.0 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 (short) emitter detector affecting the minimum incore tilt calculation exceeds 73% (68%) 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 16 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 Figure 6-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0

(-18.77, 102) (16.62, 102) 100.0

(-23.17, 92) (26.35, 92) 90.0

(-29.60, 80) 80.0 (27.18, 80) 70.0

(-30.28, 60) 60.0 (27.87, 60)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION 50.0 REGION RESTRICTED RESTRICTED REGION REGION 40.0 Power, % of 2568 MWt 30.0 20.0 10.0 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 24 COLR CALC-ANO1-NE-11-00002 Figure 7-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0

(-25.42, 77) (23.19, 77)

(-30.13, 69) 70.0 (33.54, 69)

(-36.16, 60) 60.0 (33.65, 60)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION 50.0 REGION

(-36.33, 45) (33.84, 45) 40.0 Power, % of 2568 MWt RESTRICTED RESTRICTED REGION REGION 30.0 20.0 10.0 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 24 COLR CALC-ANO1-NE-11-00002 Figure 7-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Three-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0

(-17.02, 77) (15.19, 77)

(-21.45, 69) 70.0 (24.35, 69)

(-27.12, 60) 60.0 (25.02, 60)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION 50.0 REGION

(-27.64, 45) (25.54, 45) 40.0 Power, % of 2568 MWt RESTRICTED RESTRICTED REGION REGION 30.0 20.0 10.0 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 (short) emitter detector affecting the minimum incore tilt calculation exceeds 73% (68%) 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 19 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 Figure 7-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0

(-19.63, 77) (17.49, 77)

(-24.30, 69) 70.0 (27.56, 69)

(-30.28, 60) 60.0 (27.87, 60)

PERMISSIBLE PERMISSIBLE OPERATING OPERATING REGION 50.0 REGION

(-30.77, 45) (28.38, 45) 40.0 Power, % of 2568 MWt RESTRICTED RESTRICTED REGION REGION 30.0 20.0 10.0 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 24 COLR CALC-ANO1-NE-11-00002 Figure 8-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Two-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0 70.0 60.0

(-25.70, 52) (23.50, 52) 50.0

(-30.41, 46) (33.83, 46)

(-36.39, 40) PERMISSIBLE 40.0 PERMISSIBLE (33.90, 40)

OPERATING OPERATING REGION REGION Power, % of 2568 MWt

(-36.50, 30) 30.0 (34.03, 30)

RESTRICTED RESTRICTED REGION 20.0 REGION 10.0 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 24 COLR CALC-ANO1-NE-11-00002 Figure 8-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Two-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0 70.0 60.0

(-17.88, 52) (16.06, 52) 50.0

(-22.26, 46) (25.15, 46)

(-27.82, 40) PERMISSIBLE 40.0 PERMISSIBLE (25.72, 40)

OPERATING OPERATING REGION REGION Power, % of 2568 MWt

(-28.17, 30) 30.0 (26.07, 30)

RESTRICTED RESTRICTED 20.0 REGION REGION 10.0 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 (short) emitter detector affecting the minimum incore tilt calculation exceeds 73% (68%) 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 22 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 Figure 8-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Two-Pump Operation from 0 to EOC (Figure is referred to by Technical Specification 3.2.3) 110.0 100.0 90.0 80.0 70.0 60.0

(-20.45, 52) (18.34, 52) 50.0

(-25.07, 46) (28.35, 46)

(-30.94, 40) PERMISSIBLE 40.0 PERMISSIBLE (28.54, 40)

OPERATING OPERATING REGION REGION Power, % of 2568 MWt

(-31.26, 30) 30.0 (28.87, 30)

RESTRICTED RESTRICTED 20.0 REGION REGION 10.0 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 24 COLR CALC-ANO1-NE-11-00002 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 6.33 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 (short) emitter detector affecting the minimum in-core tilt calculation exceeds 73% (68%) 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 24 COLR CALC-ANO1-NE-11-00002 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) 19 18 7.779 ft (34000, 17.4) 6.021 ft (34000, 17.3) 4.264 ft (34000, 17.2) 17 9.536 ft (34000, 17.1)

Linear Heat Rate Limit (KW/ft) 12 ft (34000, 16.2) 2.506 ft (34000, 17.0)

X X 16 0 ft (34000, 16.2) 15 14 (62000, 12.5) 13 12 X

(62000, 11.8) 11 0 10000 20000 30000 40000 50000 60000 70000 Burnup (MWd/mtU)

ANO-1 25 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 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 the Mark-B-HTP fuel are provided. 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 2.08970 0.01 2.68281 0.01 2.74462 0.14 2.09061 0.14 2.58266 0.14 2.58449 0.20 2.09081 0.20 2.64487 0.20 2.65108 0.30 2.09080 0.30 2.74565 0.30 2.75329 0.40 2.09048 0.40 2.78466 0.40 2.82309 1.1 0.50 2.09030 1.4 0.50 2.69263 1.7 0.50 2.86702 0.60 2.08995 0.60 2.58415 0.60 2.79623 0.70 2.08979 0.70 2.49099 0.70 2.70161 0.80 2.08866 0.80 2.37534 0.80 2.58298 0.89 2.04041 0.89 2.30086 0.89 2.50578 0.99 1.94602 0.99 2.21159 0.99 2.41376 0.01 2.38393 0.01 2.70611 0.01 2.76248 0.14 2.38637 0.14 2.58407 0.14 2.58536 0.20 2.38711 0.20 2.64723 0.20 2.65100 0.30 2.38666 0.30 2.74950 0.30 2.75344 0.40 2.38616 0.40 2.81333 0.40 2.82636 1.2 0.50 2.38612 1.5 0.50 2.77586 1.8 0.50 2.87190 0.60 2.38553 0.60 2.66315 0.60 2.85278 0.70 2.30194 0.70 2.56832 0.70 2.75823 0.80 2.20190 0.80 2.44935 0.80 2.64208 0.89 2.13510 0.89 2.37414 0.89 2.56412 0.99 2.04448 0.99 2.28275 0.99 2.47374 0.01 2.66050 0.01 2.72554 0.01 2.78038 0.14 2.58201 0.14 2.58400 0.14 2.58548 0.20 2.64238 0.20 2.64915 0.20 2.65223 0.30 2.70551 0.30 2.75237 0.30 2.75356 0.40 2.68966 0.40 2.81854 0.40 2.82802 1.3 0.50 2.59373 1.6 0.50 2.84445 1.9 0.50 2.87614 0.60 2.49505 0.60 2.73470 0.60 2.89110 0.70 2.40470 0.70 2.63922 0.70 2.80738 0.80 2.29341 0.80 2.51853 0.80 2.69523 0.89 2.22210 0.89 2.44208 0.89 2.61744 0.99 2.13400 0.99 2.34902 0.99 2.52919 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 24 COLR CALC-ANO1-NE-11-00002 Figure 10 Reactor Protection System Maximum Allowable Setpoints for Axial Power Imbalance (Figure is referred to by Technical Specification 2.1.1.1, 2.1.1.2, and 3.3.1) 120

(-34, 107.0) (30, 107.0) 100 ACCEPTABLE

(-44, 92.5) 4 PUMP (45, 92.5)

OPERATION

(-34, 80.0) (30, 80.0) 80 ACCEPTABLE 3 AND 4 PUMP

(-44, 66.0) OPERATION (45, 66.0) 60

(-34, 53.0) (30, 53.0)

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

(-44, 39.5) OPERATION 40 allowable values for (45, 39.5) an approximate 25%

Thermal Power Level %

and 49% flow reduction for three-and two-pump operation respectively. The actual setpoint curve 20 will be calculated by the Reactor Protection System and will be directly proportional to the indicated flow.

(-44, 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 24 COLR CALC-ANO1-NE-11-00002 Figure 11 Reactor Protection System Variable Low Pressure Temperature Envelope Setpoints (Figure is referred to by Technical Specification 3.3.1) 2400 P = 2355 psig T = 618 °F Reactor Coolant Pressure, psig 2200 ACCEPTABLE OPERATION 2000 P = (16.25 Tout - 8063) psig UNACCEPTABLE OPERATION 1800 P = 1800 psig 1600 560 580 600 620 640 660 Reactor Outlet Temperature, °F ANO-1 28 Rev. 2

CYCLE 24 COLR CALC-ANO1-NE-11-00002 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 2 602.6 602.9 603.15 143.36 Note 6 106.46 Note 7 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 24 COLR CALC-ANO1-NE-11-00002 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 as a function of EFPD is 2303 ppm.

ANO-1 30 Rev. 2

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