HNP-18-019, Cycle 21 Core Operating Limits Report, Revision 1

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Cycle 21 Core Operating Limits Report, Revision 1
ML18045A648
Person / Time
Site: Harris Duke Energy icon.png
Issue date: 02/14/2018
From: Bradley Jones
Duke Energy Progress
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
HNP-18-019
Download: ML18045A648 (24)
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Text

Bentley K. Jones

(~DUKE Director, Organizational Effectiveness Harris Nuclear Plant ENERGY 5413 Shearon Harris Road New Hill, NC 27562-9300 919.362.2305 FEB 1 4 2018 Serial: HNP-18-019 Attn: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63

Subject:

Cycle 21 Core Operating Limits Report, Revision 1 Ladies and Gentlemen :

In accordance with Technical Specification (TS) 6.9.1.6.4, Duke Energy Progress, LLC, provides the Shearon Harris Nuclear Power Plant, Unit 1 (HNP), Cycle 21 Core Operating Limits Report (COLR), Revision 1. Revision 1 reflects the relocation of cycle specific parameters from the HNP TSs to the COLR per Facility Operating License Amendment No. 161, issued by letter dated November 6, 2017 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML17250A202).

Enclosure 1 provides a summary of changes implemented per Revision 1 to the Cycle 21 COLR. Enclosure 2 contains a copy of Revision 1 to the Cycle 21 COLR.

This document contains no new regulatory commitments. Please refer any questions regarding this request to Jeff Robertson, Regulatory Affairs Manager, at (919) 362-3137.

Sincerely, Bentley K. Jones

Enclosures:

1. Summary of Changes - HNP Cycle 21 Core Operating Limits Report Revision 1
2. Cycle 21 Core Operating Limits Report, Revision 1 cc: J. Zeiler, NRC Senior Resident Inspector, HNP M. Barillas, NRC Project Manager, HNP C. Haney, NRC Regional Administrator, Region II

Bentley K. Jones Director, Organizational Effectiveness Harris Nuclear Plant 5413 Shearon Harris Road New Hill, NC 27562-9300 919.362.2305 Serial: HNP-18-019 Attn: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63

Subject:

Cycle 21 Core Operating Limits Report, Revision 1 Ladies and Gentlemen:

In accordance with Technical Specification (TS) 6.9.1.6.4, Duke Energy Progress, LLC, provides the Shearon Harris Nuclear Power Plant, Unit 1 (HNP), Cycle 21 Core Operating Limits Report (COLR), Revision 1. Revision 1 reflects the relocation of cycle specific parameters from the HNP TSs to the COLR per Facility Operating License Amendment No. 161, issued by letter dated November 6, 2017 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML17250A202). provides a summary of changes implemented per Revision 1 to the Cycle 21 COLR. Enclosure 2 contains a copy of Revision 1 to the Cycle 21 COLR.

This document contains no new regulatory commitments. Please refer any questions regarding this request to Jeff Robertson, Regulatory Affairs Manager, at (919) 362-3137.

Sincerely, Bentley K. Jones

Enclosures:

1. Summary of Changes - HNP Cycle 21 Core Operating Limits Report Revision 1
2. Cycle 21 Core Operating Limits Report, Revision 1 cc: J. Zeiler, NRC Senior Resident Inspector, HNP M. Barillas, NRC Project Manager, HNP C. Haney, NRC Regional Administrator, Region II

U.S. Nuclear Regulatory Commission Serial: HNP-18-019 HNP-18-019 Enclosure 1 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63 Summary of Changes - HNP Cycle 21 Core Operating Limits Report Revision 1 (1 page plus cover)

U.S. Nuclear Regulatory Commission Serial: HNP-18-019 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63 Summary of Changes - HNP Cycle 21 Core Operating Limits Report Revision 1 Section Description of Change Section 1.0 Added reference to Technical Specification (TS) 2.1.1, Reactor Core Safety Limits, TS 2.2.1, Reactor Trip System Instrumentation Setpoints, and TS 3/4.2.5, DNB

[Departure from Nucleate Boiling] Parameters. This is in alignment with Facility Operating License Amendment No. 161 and HNP TS 6.9.1.6.1.

Section 2.9 New Section: Reactor Core Safety Limits (Specification 2.1.1)

Relocated from TS per Facility Operating License Amendment No. 161.

Section 2.10 New Section: Reactor Trip System Instrumentation Setpoints (Specification 2.2.1)

Relocated from TS per Facility Operating License Amendment No. 161.

Section 2.11 New Section: Reactor Coolant System DNB Parameters (Specification 3/4.2.5)

Relocated from TS per Facility Operating License Amendment No. 161.

Section 3.0 Updated Methodology References 2, 3, 4, 5, 9, 10, 11, and 14 to reflect the relocation of the parameters from TS to the COLR per Facility Operating License Amendment No. 161. Also added new References 17, 18, and 19 to reflect the current list as found in TS 6.9.1.6.2. These new references include a note establishing that they were not used for Cycle 21.

Figure 7 Added New Figure: Reactor Core Safety Limits - Three Loops in Operation.

Relocated from TS per Facility Operating License Amendment No. 161. Added table with corresponding data points.

U.S. Nuclear Regulatory Commission Serial: HNP-18-019 HNP-18-019 Enclosure 2 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63 Cycle 21 Core Operating Limits Report Revision 1 (19 pages plus cover)

TECHNICAL SPECIFICATION EQUIPMENT PLP-106 LIST PROGRAM AND Rev. 068 CORE OPERATING LIMITS REPORT Page 73 of 95 ATTACHMENT 9 Page 1 of 19

<< Harris Unit 1 Cycle 21 Core Operating Limits Report - Rev. 1 >>

1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Shearon Harris Unit 1 Cycle 21 has been prepared in accordance with the requirements of Technical Specification 6.9.1.6.

The Technical Specifications affected by this report are listed below:

2.1.1 Reactor Core Safety Limits 2.2.1 Reactor Trip System Instrumentation Setpoints 3/4.1.1.2 SHUTDOWN MARGIN - Modes 3, 4, and 5 3/4.1.1.3 Moderator Temperature Coefficient 3/4.1.3.5 Shutdown Rod Insertion Limit 3/4.1.3.6 Control Rod Insertion Limits 3/4.2.1 Axial Flux Difference 3/4.2.2 Heat Flux Hot Channel Factor - FQ(Z) 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - FH 3/4.2.5 DNB Parameters 3/4.9.1.a Boron Concentration During Refueling Operations 2.0 OPERATING LIMITS The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the following subsections. These limits have been developed using NRC approved methodologies specified in Technical Specification 6.9.1.6 and given in Section 3.0.

2.1 SHUTDOWN MARGIN - MODES 3, 4, and 5 (Specification 3/4.1.1.2)

The SHUTDOWN MARGIN versus RCS boron concentration - Modes 3, 4, and 5 is specified in Figure 1.

2.2 Moderator Temperature Coefficient (Specification 3/4.1.1.3)

1. The Moderator Temperature Coefficient (MTC) limits are:

The Positive MTC Limit (ARO/HZP) shall be less positive than +5.0 pcm/°F for power levels up to 70% RTP with a linear ramp to 0 pcm/°F at 100% RTP.

The Negative MTC Limit (ARO/RTP) shall be less negative than -50 pcm/°F.

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2.2 Moderator Temperature Coefficient (Specification 3/4.1.1.3) (continued)

2. The MTC Surveillance limit is:

The 300 ppm/ARO/RTP-MTC should be less negative than or equal to -44.8 pcm/°F.

where:

  • ARO stands for All Rods Out
  • HZP stands for Hot Zero THERMAL POWER
  • RTP stands for RATED THERMAL POWER 2.3 Shutdown Rod Insertion Limit (Specification 3/4.1.3.5)

Fully withdrawn for all shutdown rods shall be greater than or equal to 225 steps.

2.4 Control Rod Insertion Limit (Specification 3/4.1.3.6)

The control rod banks shall be limited in physical insertion as specified in Figure 2.

Fully withdrawn for all control rods shall be greater than or equal to 225 steps.

2.5 Axial Flux Difference (Specification 3/4.2.1)

The AXIAL FLUX DIFFERENCE (AFD) target band is specified in Figure 3.

2.6 Heat Flux Hot Channel Factor - FQ(Z) (Specification 3/4.2.2)

1. The FQ(Z) Limit as referenced in TS 3.2.2 is:

FQ(Z) FQRTP

  • K(Z)/P for P > 0.5 FQ(Z) FQRTP
  • K(Z)/0.5 for P 0.5 where:
a. P = THERMAL POWER/RATED THERMAL POWER
b. FQRTP = 2.41 for all Fuel
c. K(Z) = the normalized FQ(Z) as a function of core height, as specified in Figure 4. K(Z) is set equal to 1.0 for all axial elevations.

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2.6 Heat Flux Hot Channel Factor - FQ(Z) (Specification 3/4.2.2) (continued)

2. V(Z) Curves versus core height for PDC-3 Operation, as used in T.S. 4.2.2, are specified in Figures 5 through 6. The first V(Z) curve (Figure 5) is valid for Cycle 21 burnups from 0 up to but not including 15000 MWD/MTU. The second V(Z) curve (Figure 6) is valid for Cycle 21 burnups greater than or equal to 15000 MWD/MTU to a maximum cycle energy of 21935 MWD/MTU.

2.7 Nuclear Enthalpy Rise Hot Channel Factor - FH (Specification 3/4.2.3)

FH FHRTP * (1 + PFH * (1 - P))

where:

1. P = THERMAL POWER/RATED THERMAL POWER
2. FHRTP = FH Limit at RATED THERMAL POWER = 1.66 For all Fuel
3. PFH = Power Factor Multiplier for FH = 0.35 For all Fuel FH = Enthalpy rise hot channel factor obtained by using the movable incore detectors to obtain a power distribution map, with the measured value of the nuclear enthalpy rise hot channel factor (FHN) increased by an allowance of 4% to account for measurement uncertainty.

2.8 Boron Concentration During Refueling Operations (Specification 3/4.9.1.a)

Through the end of Cycle 21, the boron concentration required to maintain Keff less than or equal to 0.95 is equal to 2222 ppm. Boron concentration must be maintained greater than or equal to 2222 ppm during refueling operations.

2.9 Reactor Core Safety Limits (Specification 2.1.1)

The Reactor Core Safety Limits are shown in Figure 7.

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2.10 Reactor Trip System Instrumentation Setpoints (Specification 2.2.1)

1. Overtemperature T Setpoint Parameter Values Parameter Nominal Value Reference Tavg at RTP T' 588.8 °F Normal RCS Operating Pressure P' = 2,235 psig Overtemperature T reactor trip setpoint K1 1.185 coefficient Overtemperature T reactor trip heatup setpoint K2 = 0.0224 / °F penalty coefficient Overtemperature T reactor trip depressurization K3 = 0.0012 / psig setpoint penalty coefficient Time constants utilized in lead-lag compensator 1 = 0.0 sec for T 2 = 0.0 sec Time constant utilized in the lag compensator for 3 4.0 sec T

Time constants utilized in the lead-lag 4 22.0 sec compensator for Tavg 5 4.0 sec Time constant utilized in the measured Tavg lag 6 = 0.0 sec compensator f1(I) "positive" breakpoint = 12 %I f1(I) "negative" breakpoint = -21.6 %I f1(I) "positive" slope = 1.5 %To / %I f1(I) "negative" slope = 1.75 %To / %I

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2.10 Reactor Trip System Instrumentation Setpoints (Specification 2.2.1) (continued)

2. Overpower T Setpoint Parameter Values Parameter Nominal Value Reference Tavg at RTP T 588.8 °F Overpower T reactor trip setpoint coefficient K4 1.120 Overpower T reactor trip penalty coefficient K5 = 0.02 / °F for increasing Tavg K5 = 0.0 / °F for decreasing Tavg Overpower T reactor trip heatup setpoint penalty K6 = 0.002 / °F for T > T

coefficient K6 = 0.0 / °F for T T

Time constant utilized in the rate-lag compensator 7 13.0 sec for Tavg f2(I) 0.0 for all I 2.11 Reactor Coolant System DNB Parameters (Specification 3/4.2.5)

1. Reactor Coolant System Tavg 594.8 °F after addition for instrument uncertainty
2. Pressurizer Pressure 2,185 psig after subtraction for instrument uncertainty
3. RCS total flow rate 293,540 gpm after subtraction for instrument uncertainty

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3.0 METHODOLOGY REFERENCES

1. XN-75-27(P)(A) (June 1975) and Supplements 1 (September 1976),

2 (December 1977), 3 (November 1980), 4 (December 1985), and 5 (February 1987), "Exxon Nuclear Neutronics Design Methods for Pressurized Water Reactors," Exxon Nuclear Company, Richland, WA 99352. (Not used for Cycle 21.)

(Methodology for Specification 3.1.1.2 - SHUTDOWN MARGIN - Modes 3, 4, and 5, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.9.1 - Boron Concentration).

2. ANF-89-151(P)(A), "ANF-RELAP Methodology for Pressurized Water Reactors:

Analysis of Non-LOCA Chapter 15 Events," Advanced Nuclear Fuels Corporation, Richland, WA 99352, May 1992.

(Methodology for Specification 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.2.5 - DNB Parameters).

3. XN-NF-82-21(P)(A), Revision 1, "Application of Exxon Nuclear Company PWR Thermal Margin Methodology to Mixed Core Configurations," Exxon Nuclear Company, Richland, WA 99352, September 1983.

(Methodology for Specification 2.1.1 - Reactor Core Safety Limits, 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.2.5 - DNB Parameters).

4. XN-75-32(P)(A), (April 1975) Supplements 1 (July 1979), 2 (July 1979),

3 (January 1980), and 4 (October 1983), "Computational Procedure for Evaluating Fuel Rod Bowing," Exxon Nuclear Company, Richland, WA 99352.

(Methodology for Specification 2.1.1 - Reactor Core Safety Limits, 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.2.5 - DNB Parameters).

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3.0 METHODOLOGY REFERENCES (continued)

5. EMF-84-093(P)(A), Revision 1, "Steam line Break Methodology for PWRs,"

Siemens Power Corporation, May 1999.

(Methodology for Specification 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Facto, and 3.2.5 - DNB Parameters).

6. ANP-3011(P), Revision 1, "Harris Nuclear Plant Unit 1 Realistic Large Break LOCA Analysis," as approved by NRC Safety Evaluation dated May 30, 2012, issued August 2011.

(Methodology for Specification 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, and 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor).

7. XN-NF-78-44(NP)(A), "A Generic Analysis of the Control Rod Ejection Transient for Pressurized Water Reactors," Exxon Nuclear Company, Richland, WA 99352, October 1983.

(Methodology for Specification 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, and 3.2.2 - Heat Flux Hot Channel Factor).

8. ANF-88-054(P)(A), "PDC-3: Advanced Nuclear Fuels Corporation Power Distribution Control for Pressurized Water Reactors and Application of PDC-3 to H. B. Robinson Unit 2," Advanced Nuclear Fuels Corporation, Richland, WA 99352, October 1990.

(Methodology for Specification 3.2.1 - Axial Flux Difference, and 3.2.2 - Heat Flux Hot Channel Factor).

9. EMF-92-081(P)(A), Revision 1, "Statistical Setpoint/Transient Methodology for Westinghouse Type Reactors," Siemens Power Corporation, July 2000.

(Methodology for Specification 2.1.1 - Reactor Core Safety Limits, 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.2.5 - DNB Parameters).

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3.0 METHODOLOGY REFERENCES (continued)

10. EMF-92-153(P)(A), Revision 1, "HTP: Departure from Nucleate Boiling Correlation for High Thermal Performance Fuel," Siemens Nuclear Power Corporation, Richland, WA 99352, January 2005.

(Methodology for Specification 2.1.1 - Reactor Core Safety Limits, 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.2.5 - DNB Parameters).

11. BAW-10240 (P)(A),Revision 0, "Incorporation of M5TM Properties in Framatome ANP Approved Methods," Framatome ANP, May 2004 (Methodology for Specification 2.1.1 - Reactor Core Safety Limits, 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.1.1.2 - SHUTDOWN MARGIN - MODES 3, 4 and 5, 3.1.1.3- Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6- Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, 3.2.5 - DNB Parameters, and 3.9.1 - Boron Concentration).
12. EMF-96-029(P)(A), Volumes 1 and 2, "Reactor Analysis Systems for PWRs, Volume 1 - Methodology Description, Volume 2 - Benchmarking Results,"

Siemens Power Corporation, January 1997.

(Methodology for Specification 3.1.1.2 - SHUTDOWN MARGIN - MODES 3, 4, and 5, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.9.1 - Boron Concentration).

13. EMF-2328(P)(A), Revision 0, "PWR Small Break LOCA Evaluation Model, S-RELAP5 Based," Framatone ANP, May 2001, and Errata, January 2008.

(Methodology for Specification 3.2.1 - Axial Flux Difference, and 3.2.2 - Heat Flux Hot Channel Factor), and 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor).

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3.0 METHODOLOGY REFERENCES (continued)

14. EMF -2310 (P)(A), Revision 1, "SRP Chapter 15 Non-LOCA Methodology for Pressurized Water Reactors," Framatome ANP, June 2004.

(Methodology for Specification 2.2.1 - Reactor Trip System Instrumentation Setpoints, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1- Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.2.5 - DNB Parameters).

15. Mechanical Design Methodologies XN-NF-81-58(P)(A), Revision 2 and Supplements 1 and 2, "RODEX2 Fuel Rod Thermal-Mechanical Response Evaluation Model," Exxon Nuclear Company, March 1984.

ANF-81-58(P)(A), Revision 2 and Supplements 3 and 4, "RODEX2 Fuel Rod Thermal Mechanical Response Evaluation Model," Advanced Nuclear Fuels Corporation, June 1990.

XN-NF-82-06(P)(A), Revision 1 and Supplements 2, 4, and 5, "Qualification of Exxon Nuclear Fuel for Extended Burnup," Exxon Nuclear Company, October 1986.

ANF-88-133(P)(A), and Supplement 1, "Qualification of Advanced Nuclear Fuels' PWR Design Methodology for Rod Burnups of 62 GWd/MTU," Advanced Nuclear Fuels Corporation, December 1991.

XN-NF-85-92(P)(A), "Exxon Nuclear Uranium Dioxide/Gadolinia Irradiation Examination and Thermal Conductivity Results," Exxon Nuclear Company, November 1986.

EMF-92-116(P)(A), Revision 0 and Supplement 1(P)(A)-000, "Generic Mechanical Design Criteria for PWR Fuel Designs," Siemens Power Corporation, February 1999 and May 2015.

(Methodologies for Specification 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, and 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor).

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3.0 METHODOLOGY REFERENCES (continued)

16. DPC-NE-2005-P-A, "Thermal-Hydraulic Statistical Core Design Methodology,"

Revision 5, NRC Safety Evaluation: ML16049A630 (Not used for Cycle 21.)

(Methodology for Specification 3.2.3 -Nuclear Enthalpy Rise Hot Channel Factor)

17. DPC-NE-1008-P-A, "Nuclear Design Methodology Using CASMO-5/SIMULATE-3 for Westinghouse Reactors," Revision 0, NRC Safety Evaluation: ML17102A923.

(Not used for Cycle 21)

(Methodology for Specification 3.1.1.2 - SHUTDOWN MARGIN - MODES 3, 4, and 5, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor, and 3.9.1 - Boron Concentration)

18. DPC-NF-2010-A, "Nuclear Physics Methodology for Reload Design," Revision 3, NRC Safety Evaluation: ML17102A923. (Not used for Cycle 21)

(Methodology for Specification 3.1.1.2 - SHUTDOWN MARGIN - MODES 3, 4, and 5, 3.1.1.3 - Moderator Temperature Coefficient, 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, and 3.9.1 - Boron Concentration)

19. DPC-NE-2011-P-A, "Nuclear Design Methodology Report for Core Operating Limits of Westinghouse Reactors," Revision 2, NRC Safety Evaluation:

ML17102A923. (Not used for Cycle 21)

(Methodology for Specification 3.1.3.5 - Shutdown Bank Insertion Limits, 3.1.3.6 - Control Bank Insertion Limits, 3.2.1 - Axial Flux Difference, 3.2.2 - Heat Flux Hot Channel Factor, and 3.2.3 - Nuclear Enthalpy Rise Hot Channel Factor)

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4.0 OTHER REQUIREMENTS 4.1 Movable Incore Detection System

1. Functionality: The Movable Incore Detection System shall be functional with:
a. At least 38 detector thimbles at the beginning of cycle (where the beginning of cycle is defined in this instance as a flux map determination that the core is loaded consistent with design),
b. A minimum of 38 detector thimbles for the remainder of the operating cycle,
c. A minimum of two detector thimbles per core quadrant, and
d. Sufficient movable detectors, drive, and readout equipment to map these thimbles.
2. Applicability: When the Movable Incore Detection System is used for:
a. Recalibration of the Excore Neutron Flux Detection System, or
b. Monitoring the QUADRANT POWER TILT RATIO, or
c. Measurement of FH and FQ(Z)
3. Surveillance Requirements: The Movable Incore Detection System shall be demonstrated functional, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to use, by irradiating each detector used and determining the acceptability of its voltage curve when required for:
a. Recalibration of the Excore Neutron Flux Detection System, or
b. Monitoring the QUADRANT POWER TILT RATIO, or
c. Measurement of FH and FQ(Z)

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4.0 OTHER REQUIREMENTS (continued)

4. Bases:

The functionality of the movable incore detectors with the specified minimum complement of equipment ensures that the measurements obtained from use of this system accurately represent the spatial neutron flux distribution of the core.

The functionality of this system is demonstrated by irradiating each detector used and determining the acceptability of its voltage curve.

For the purpose of measuring FQ(Z) or FH, a full incore flux map is used.

Quarter-core flux maps, as defined in WCAP-8648, June 1976, may be used in recalibration of the Excore Neutron Flux Detection System, and full incore flux maps or symmetric incore thimbles may be used for monitoring QUADRANT POWER TILT RATIO when one Power Range channel is INOPERABLE.

5. Evaluation Requirements:

In order to change the requirements concerning the number and location of functional detectors, the NRC staff deems that a rigorous evaluation and justification is required. The following is a list of elements that must be part of a 50.59 determination and available for audit if the licensee wishes to change the requirements:

a. How an inadvertent loading of a fuel assembly into an improper location will be detected,
b. How the validity of the tilt estimates will be ensured,
c. How adequate core coverage will be maintained,
d. How the measurement uncertainties will be assured and why the added uncertainties are adequate to guarantee that measured nuclear heat flux hot channel factor, nuclear enthalpy rise hot channel factor, radial peaking factor and quadrant power tilt factor meet Technical Specification limits, and
e. How the Movable Incore Detection System will be restored to full (or nearly full) service before the beginning of each cycle.

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Figure 1, Shutdown Margin Versus RCS Boron Concentration Modes 3, 4, and 5/Drained

  • Applicable to MODE 4, with or without RCPs in operation

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Figure 2, Rod Group Insertion Limits Versus Thermal Power (Three Loop Operation)

Notes:

1. Fully withdrawn position shall be greater than or equal to 225 steps.
2. Control Banks A and B must be withdrawn from the core prior to power operation.

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<< Harris Unit 1 Cycle 21 Core Operating Limits Report - Rev. 1 >>

Figure 3, Axial Flux Difference Limits as a Function of Rated Thermal Power Note:

At power levels less than HFP, the deviation is applied to the target AFD appropriate to that power level. The target AFD varies linearly between the HFP target and zero at zero power.

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<< Harris Unit 1 Cycle 21 Core Operating Limits Report - Rev. 1 >>

Figure 4, K(Z) - Local Axial Penalty Function for FQ(Z)

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<< Harris Unit 1 Cycle 21 Core Operating Limits Report - Rev. 1 >>

Figure 5, Cycle 21 V(Z) Versus Core Height 0 MWD/MTU burnup < 15000 MWD/MTU Top and bottom 15% excluded per Technical Specification 4.2.2.2.g.

For all power levels below 50% RTP, the V(Z) data at all axial levels is 1.0. It is conservative to apply the above figure to power levels below 50% RTP.

TECHNICAL SPECIFICATION EQUIPMENT PLP-106 LIST PROGRAM AND Rev. 068 CORE OPERATING LIMITS REPORT Page 90 of 95 ATTACHMENT 9 Page 18 of 19

<< Harris Unit 1 Cycle 21 Core Operating Limits Report - Rev. 1 >>

Figure 6, Cycle 21 V(Z) Versus Core Height 15000 MWD/MTU burnup 21935 MWD/MTU Top and bottom 15% excluded per Technical Specification 4.2.2.2.g.

For all power levels below 50% RTP, the V(Z) data at all axial levels is 1.0. It is conservative to apply the above figure to power levels below 50% RTP.

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<< Harris Unit 1 Cycle 21 Core Operating Limits Report - Rev. 1 >>

Figure 7, Reactor Core Safety Limits - Three Loops in Operation Data Points for Figure 7 Pressure (psig) Power Fraction Tavg (°F) 0.00 654.75 2385 0.96 625.00 1.20 599.00 0.00 645.25 2235 0.96 613.00 1.20 589.00 0.0 627.00 1960 0.96 598.00 1.20 575.00

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