1CAN102203, Cycle 31 Core Operating Limits Report
| ML22297A101 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/24/2022 |
| From: | Keele R Entergy Operations |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 1CAN102203 | |
| Download: ML22297A101 (1) | |
Text
Entergy Operations, Inc. 1448 SR 333, Russellville, AR 72802 1CAN102203 October 24, 2022 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
ANO-1 Cycle 31 Core Operating Limits Report Arkansas Nuclear One - Unit 1 NRC Docket No. 50-313 Renewed Facility Operating 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. Enclosed is the ANO-1 Cycle 31 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.
There are no new commitments contained in this submittal.
This completes the reporting requirement of the stated specification. Should you have any questions, please contact Riley Keele, Manager, Regulatory Assurance at 479-858-7826.
Respectfully, RDK/mar
Enclosure:
ANO-1 Cycle 31 Core Operating Limits Report (COLR)
Riley D. Keele, Jr.
Manager, Regulatory Assurance Arkansas Nuclear One Tel 479-858-7826 Digitally signed by Riley D. Keele Jr.
DN: cn=Riley D. Keele Jr., c=US, o=Regulatory Assurance, email=rkeele@entergy.com Reason: I am approving this document Date: 2022.10.24 09:36:24 -05'00'
1CAN102203 Page 2 of 2 cc:
NRC Region IV Regional Administrator NRC Senior Resident Inspector - Arkansas Nuclear One NRC Project Manager - Arkansas Nuclear One Designated Arkansas State Official
Enclosure 1CAN102203 ANO-1 Cycle 31 Core Operating Limits Report (COLR)
(36 pages)
CYCLE 31 COLR ANO-1 1
Revision 0 ENTERGY OPERATIONS ARKANSAS NUCLEAR ONE UNIT ONE CYCLE 31 CORE OPERATING LIMITS REPORT
CYCLE 31 COLR ANO-1 2
Revision 0 1.0 CORE OPERATING LIMITS This Core Operating Limits Report for ANO-1 Cycle 31 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
- 12) 3.4.4 RCS Loops - MODES 1 and 2
- 13) 3.9.1 Boron Concentration Note:
The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
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.
Framatome Document, "Transmittal of ANO1-31 Limits and Setpoints", FS1-0063789-1.0, August 15, 2022.
- 4.
Framatome Document, "Transmittal of the ANO-1 Cycle 31 Reload Report",
FS1-0063813-2.0, August 31, 2022, CALC-ANO1-NE-22-00003.
- 5.
Framatome Document, "Transmittal of ANO1-31 Core Load Plan (CLP)", FS100640591.0, September 8, 2022, CALC-ANO1-NE-22-00004.
- 6.
"IC (Initial Condition) DNB RCS Protection Criteria," CALC-96-E-0023-02, Rev. 7.
- 7.
Framatome Document, "Transmittal of ANO1-31 Reload Technical Document (RTD)",
FS1-0063728-2.0, August 24, 2022, CALC-ANO1-NE-22-00002.
CYCLE 31 COLR ANO-1 3
Revision 0 Table Of Contents 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-A1 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 0 EFPD to 200 +/- 10 EFPD...................................... 15 Fig. 6-A2 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 200 +/- 10 EFPD to EOC........................................... 16 Fig. 6-B1 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Four-Pump Operation from 0 EFPD to 200 +/- 10 EFPD...................................... 17 Fig. 6-B2 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Four-Pump Operation from 200 +/- 10 EFPD to EOC........................................... 18 Fig. 6-C1 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 0 EFPD to 200 +/- 10 EFPD...................................... 19 Fig. 6-C2 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 200 +/- 10 EFPD to EOC........................................... 20 Fig. 7-A1 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 0 EFPD to 200 +/- 10 EFPD.................................... 21 Fig. 7-A2 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 200 +/- 10 EFPD to EOC......................................... 22
CYCLE 31 COLR ANO-1 4
Revision 0 Fig. 7-B1 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Three-Pump Operation from 0 EFPD to 200 +/- 10 EFPD.................................... 23 Fig. 7-B2 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Three-Pump Operation from 200 +/- 10 EFPD to EOC......................................... 24 Fig. 7-C1 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 0 EFPD to 200 +/- 10 EFPD.................................... 25 Fig. 7-C2 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 200 +/- 10 EFPD to EOC......................................... 26 Fig. 8-A AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Two-Pump Operation from 0 EFPD to EOC........................................................ 27 Fig. 8-B AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions for Two-Pump Operation from 0 EFPD to EOC........................................................ 28 Fig. 8-C AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Two-Pump Operation from 0 EFPD to EOC........................................................ 29 QUADRANT POWER TILT LIMITS AND SETPOINTS............................................................. 30 POWER PEAKING FACTORS Fig. 9A LOCA Linear Heat Rate Limits for Mark-B-HTP Fuel.......................................... 31 Fig. 9B DNB Power Peaking Factors............................................................................... 32 REACTOR PROTECTION SYSTEM (RPS) INSTRUMENTATION Fig. 10 RPS Maximum Allowable Setpoints for Axial Power Imbalance......................... 33 Fig. 11 RPS Variable Low Pressure Temperature Envelope Setpoints.......................... 34 RCS PRESSURE, TEMPERATURE, AND FLOW DNB SURVEILLANCE LIMITS.................. 35 RCS LOOPS MODE 1 AND 2.................................................................................................... 36 REFUELING BORON CONCENTRATION................................................................................ 36
CYCLE 31 COLR ANO-1 5
Revision 0 FIGURE 1 Variable Low RCS Pressure - Temperature Protective Limits (Figure is referred to by Technical Specification 2.1.1.3)
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
- The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
1700 1800 1900 2000 2100 2200 2300 590 600 610 620 630 640 650 Reactor Coolant Outlet Temperature, F Core Outlet Pressure, psig 4-PUMP 1 PUMP EACH LOOP***
3-PUMP
CYCLE 31 COLR ANO-1 6
Revision 0 Figure 2 AXIAL POWER IMBALANCE Protective Limits (measurement system independent)
(Figure is referred to by Technical Specification 2.1.1 Bases)
Note:
The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
-55.2, 0.0
-55.2, 101.4
- 47.4, 112.0 41.7, 112.0 53.1, 101.4
-55.2, 77.0
- 47.4, 87.6 41.7, 87.6 53.1, 77.0
-55.2, 50.4
- 47.4, 61.0 41.7, 61.0 53.1, 50.4 53.1, 0.0 0
20 40 60 80 100 120
-70
-60
-50
-40
-30
-20
-10 0
10 20 30 40 50 60 70 Axial Power Imbalance, %
Themal Power Level, %
ACCEPTABLE 4 PUMP OPERATION ACCEPTABLE 3 AND 4 PUMP OPERATION ACCEPTABLE 2, 3 AND 4 PUMP The three - or two -
pump example curves show values for an approximate 26% and 51% flow reduction for three - and two -
pump operation, respectively. The actual setpoint curve will be calculated by the Reactor Protection System and will be directly proportional to the indicated flow.
CYCLE 31 COLR ANO-1 7
Revision 0 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.
APPLICABILITY REQUIRED SHUTDOWN MARGIN TECHNICAL SPECIFICATION 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
- The required Shutdown Margin capability of 1 %k/k in MODE 1 and MODE 2 is preserved by the Regulating Rod Insertion Limits specified in Figures 3-A&B, 4-A&B, and 5-A&B, as required by Technical Specification 3.2.1.
- 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.
CYCLE 31 COLR ANO-1 8
Revision 0 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)
- Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.
CYCLE 31 COLR ANO-1 9
Revision 0 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)
- Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.
CYCLE 31 COLR ANO-1 10 Revision 0 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)
- Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.
CYCLE 31 COLR ANO-1 11 Revision 0 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)
- Operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.
CYCLE 31 COLR ANO-1 12 Revision 0 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)
- The operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.
Note:
- 1. The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 0
50 100 150 200 250 300 Power, % of 2568 MWt Rod Index, % Withdrawn OPERATION IN THIS REGION IS NOT ALLOWED SHUTDOWN MARGIN LIMIT PERMISSIBLE OPERATING REGION OPERATION RESTRICTED (0.0, 6.2)
(21.5, 10)
(206.5, 28)
(248.5, 38)
(248.5, 44)
(272.5, 52)
(300.0, 52)
(89.9, 52)
(50.5, 29) 0 20 40 60 80 100 GROUP 6*
0 20 40 60 80 100 GROUP 5*
GROUP 7*
0 20 40 60 80 100
CYCLE 31 COLR ANO-1 13 Revision 0 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)
- The operating rod group overlap is 20% +/- 5% between two sequential groups, except for physics tests.
Note:
- 1. The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 0
50 100 150 200 250 300 Power, % of 2568 MWt Rod Index, % Withdrawn OPERATION IN THIS REGION IS NOT ALLOWED SHUTDOWN MARGIN LIMIT PERMISSIBLE OPERATING REGION OPERATION RESTRICTED (0.0, 2.6)
(81.5, 10)
(206.5, 28)
(248.5, 38)
(248.5, 44)
(272.5, 52)
(300.0, 52)
(189.5, 52)
(108.5, 29) 0 20 40 60 80 100 GROUP 6*
0 20 40 60 80 100 GROUP 5*
GROUP 7*
0 20 40 60 80 100
CYCLE 31 COLR ANO-1 14 Revision 0 AXIAL POWER SHAPING RODS (APSR) INSERTION LIMITS (Limits referred to by Technical Specification 3.2.2)
Up to 450 +/- 10 EFPD, the APSRs may be positioned as necessary for transient imbalance control; however, the APSRs shall be fully withdrawn by 460 EFPD. After the APSRs withdrawal at 450 +/- 10 EFPD, the APSRs shall not be reinserted, except during the end-of-cycle shutdown when the reactor power is equal to, or less than, 30 % FP.
CYCLE 31 COLR ANO-1 15 Revision 0 Figure 6-A1 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 0 EFPD to 200 +10/-10 EFPD (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 16 Revision 0 Figure 6-A2 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Four-Pump Operation from 200 +10/-10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 17 Revision 0 Figure 6-B1 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Four-Pump Operation from 0 EFPD to 200 +10/-10 EFPD (Figure is referred to by Technical Specification 3.2.3)
- 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.
CYCLE 31 COLR ANO-1 18 Revision 0 Figure 6-B2 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Four-Pump Operation from 200 +10/-10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3)
- 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.
CYCLE 31 COLR ANO-1 19 Revision 0 Figure 6-C1 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 0 EFPD to 200 +10/-10 EFPD (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 20 Revision 0 Figure 6-C2 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Four-Pump Operation from 200 +10/-10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 21 Revision 0 Figure 7-A1 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 0 EFPD to 200 +10/-10 EFPD (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 22 Revision 0 Figure 7-A2 AXIAL POWER IMBALANCE Setpoints for Full In-Core Conditions for Three-Pump Operation from 200 +10/-10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 23 Revision 0 Figure 7-B1 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Three-Pump Operation from 0 EFPD to 200 +10/-10 EFPD (Figure is referred to by Technical Specification 3.2.3)
- 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.
CYCLE 31 COLR ANO-1 24 Revision 0 Figure 7-B2 AXIAL POWER IMBALANCE Setpoints for Minimum In-Core Conditions* for Three-Pump Operation from 200 +10/-10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3)
- 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.
CYCLE 31 COLR ANO-1 25 Revision 0 Figure 7-C1 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 0 EFPD to 200 +10/-10 EFPD (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 26 Revision 0 Figure 7-C2 AXIAL POWER IMBALANCE Setpoints for Ex-Core Conditions for Three-Pump Operation from 200 +10/-10 EFPD to EOC (Figure is referred to by Technical Specification 3.2.3)
CYCLE 31 COLR ANO-1 27 Revision 0 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)
Note:
The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0
-50.00
-40.00
-30.00
-20.00
-10.00 0.00 10.00 20.00 30.00 40.00 50.00 Power, % of 2568 MWt Axial Power Imbalance, %FP PERMISSIBLE OPERATING REGION RESTRICTED REGION
(-34.51, 46)
(-37.77, 40)
(33.03, 30)
(32.92, 40)
(25.49, 46)
(13.98, 52)
(-28.14, 52)
(-37.88, 30)
PERMISSIBLE OPERATING REGION RESTRICTED REGION
(-37.88, 0)
(33.03, 0)
CYCLE 31 COLR ANO-1 28 Revision 0 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)
Note:
The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0
-50.00
-40.00
-30.00
-20.00
-10.00 0.00 10.00 20.00 30.00 40.00 50.00 Power, % of 2568 MWt Axial Power Imbalance, %FP PERMISSIBLE OPERATING REGION RESTRICTED REGION
(-25.86, 46)
(-29.00, 40)
(25.15, 30)
(24.45, 40)
(17.78, 46)
(7.66, 52)
(-20.19, 52)
(-29.35, 30)
PERMISSIBLE OPERATING REGION RESTRICTED REGION
(-29.35, 0)
(25.15, 0)
CYCLE 31 COLR ANO-1 29 Revision 0 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)
Note:
The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0
-50.00
-40.00
-30.00
-20.00
-10.00 0.00 10.00 20.00 30.00 40.00 50.00 Power, % of 2568 MWt Axial Power Imbalance, %FP PERMISSIBLE OPERATING REGION RESTRICTED REGION
(-29.00, 46)
(-32.25, 40)
(27.86, 30)
(27.54, 40)
(20.28, 46)
(9.11, 52)
(-22.78, 52)
(-32.57, 30)
PERMISSIBLE OPERATING REGION RESTRICTED REGION
(-32.57, 0)
(27.86, 0)
CYCLE 31 COLR ANO-1 30 Revision 0 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 4.38 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.
CYCLE 31 COLR ANO-1 31 Revision 0 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 Core Elevation, ft LHR Limit for 0 MWd/mtU, kW/ft LHR Limit for 28,000 MWd/mtU, kW/ft LHR Limit for 62,000 MWd/mtU, kW/ft 0.000 16.60 16.60 12.30 2.506 17.50 17.50 13.00 4.264 17.50 17.50 13.00 6.021 17.30 17.30 13.00 7.779 17.50 17.50 13.00 9.536 17.30 17.30 13.00 11.000 15.30 15.30 12.50 12.000 14.50 14.50 12.30 Allowable LOCA LHR Limits - Chrome-Coated Fuel Rods Only Core Elevation, ft LHR Limit for 0 MWd/mtU, kW/ft LHR Limit for 28,000 MWd/mtU, kW/ft LHR Limit for 62,000 MWd/mtU, kW/ft 0.000 15.70 15.70 11.60 2.506 16.60 16.60 12.30 4.264 16.60 16.60 12.30 6.021 16.40 16.40 12.30 7.779 16.60 16.60 12.30 9.536 15.10 15.10 12.30 11.000 12.50 12.50 11.50 12.000 11.80 11.80 10.90 Note:
The LOCA LHR limits may be linearly interpolated as a function of burnup between 0 MWd/mtU and 28,000 MWd/mtU, between 28,000 MWd/mtU and 62,000 MWd/mtU, and as a function of core elevation.
CYCLE 31 COLR ANO-1 32 Revision 0 Figure 9B 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 Peak x/L IC MAP Limits Axial Peak x/L IC MAP Limits Axial Peak x/L IC MAP Limits 1.1 0.01 2.04426 1.4 0.01 2.94000 1.7 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 0.50 2.04437 0.50 2.66671 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 1.2 0.01 2.33088 1.5 0.01 3.08066 1.8 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 0.50 2.33285 0.50 2.75216 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 1.3 0.01 2.64464 1.6 0.01 3.14861 1.9 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 0.50 2.56272 0.50 2.82718 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
CYCLE 31 COLR ANO-1 33 Revision 0 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)
Flux / Flow Setpoint
(% Power / % Flow)
Four Pump Operation 1.07 Three Pump Operation 1.07 Two Pump Operation 1.07 Note:
The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
-44.0, 0.0
- 44.0, 92.5
- 34.0, 107.0 27.4, 107.0 42.0, 92.5
-44.0, 64.8
- 34.0, 79.3 27.4, 79.3 42.0, 64.8
- 44.0, 37.9
- 34.0, 52.4 27.4, 52.4 42.0, 37.9 42.0, 0.0 0
20 40 60 80 100 120
-70
-60
-50
-40
-30
-20
-10 0
10 20 30 40 50 60 70 Axial Power Imbalance, %
Themal Power Level, %
ACCEPTABLE 4 PUMP ACCEPTABLE 3 AND 4 PUMP ACCEPTABLE 2, 3 AND 4 PUMP The three
- or two pump example setpoint curves show allowable values for an approximate 26%
and 51% flow reduction for three - and two -
pump operation, respectively. The actual setpoint curve will be calculated by the Reactor Protection System and will be directly proportional to the indicated flow.
CYCLE 31 COLR ANO-1 34 Revision 0 Figure 11 Reactor Protection System Variable Low Pressure Temperature Envelope Setpoints (Figure is referred to by Technical Specification 3.3.1) 560, 2355 618, 2355 618, 1980 606.9, 1800 560, 1800 1600 1800 2000 2200 2400 560 580 600 620 640 660 Reactor Coolant Pressure, psig Reactor Outlet Temperature, F ACCEPTABLE OPERATION UNACCEPTABLE OPERATION P = 16.25 Tout - 8063, psig
CYCLE 31 COLR ANO-1 35 Revision 0 RCS Pressure, Temperature, and Flow DNB Surveillance Limits (Limit is referred to by Technical Specification 3.4.1)
Four-Pump Operation Three-Pump Operation Two-Pump Operation Note 10 Minimum RCS Hot Leg Pressure (psig) Note 1 2082.2 2081.2Note 4 2120.4Note 5 2118.1 Maximum RCS Hot Leg Temperature (°F) Note 2 602.6 602.9 603.15 Minimum RCS Total Flow (Mlbm/hr) Note 3 143.36 Note 6 138.01 Note 9 106.46 Note 7 102.45 Note 9 70.64 Note 8 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.
Note 10 -- The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31.
CYCLE 31 COLR ANO-1 36 Revision 0 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 Notes:
- 1. Technical Specification 3.4.4 does not allow indefinite operation in Modes 1 and 2 with only two pumps operating.
- 2. The Operable-Comp Measure, documented CR-ANO-1-2021-00503 for Cycle 30, restricts Two-Pump operation to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> in Modes 1 and 2. This Operable-Comp Measure will be continued for Cycle 31 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 2162 ppm Boron.