ML17309A914

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Rev 0 to St Lucie Unit 2,Cycle 10 Colr.
ML17309A914
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 12/29/1997
From:
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17309A912 List:
References
NUDOCS 9801060191
Download: ML17309A914 (20)
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Text

St. Lucie Unit 2 Docket No. 50-389 Proposed License Amendment Core 0 eratin Limits Re ort COLR ENCLOSURE 1 to L-97-280 ST. LUCIE UNIT 2, CYCLE 10 CORE OPERATING LIMITS REPORT Revision 0 Page 1 of 14

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Table of Contents Des ri ti n ~P'R cd 1.0 Introduction 2.0 Core Operating Limits 2.1 Moderator Temperature Coefficient 2.2 CEA Position - Misalignment > 15 inches 2.3 Regulating CEA Insertion Limits 4" 2.4 Linear Heat Rate 2.5 TOTAL PLANAR RADIALPEAKING FACTORS 2.6 TOTAL INTEGRATED RADIALPEAKING FACTOR 2.7 DNB Parameters - AXIALSHAPE INDEX 2.8 Refueling Operations - Boron Concentration 3.0 'ist of Approved Methods 12 List of Figures Ficlure ~Titl ~Pa e 3.1-1a Allowable Time To Realign CEA vs. Initial F,T 3.1-2 CEA Insertion Limits vs. THERMAL POWER 3.2-1 Allowable Peak Linear Heat Rate vs. Burnup 3.2-2 AXIALSHAPE INDEX vs. Maximum Allowable Power Level 3.2-3 Allowable Combinations of THERMAL POWER and F,T, F~ 10 3.2-4 AXIALSHAPE INDEX Operating Limits vs. THERMAL POWER 11 St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 2 of 14

1.0 INTRODUCTION

This Core Operating Limits Report (COLR) describes the cycle-specific parameter limits for operation of St. Lucie Unit 2 Cycle 10. It contains the limits for the following as provided in Section 2.

Moderator Temperature Coefficient CEA Position - Misalignment > 15 Inches Regulating CEA Insertion Limits Linear Heat Rate TOTAL PLANAR RADIAL PEAKING FACTORS - F TOTAL INTEGRATED RADIALPEAKING FACTOR - F, DNB Parameter - AXIALSHAPE INDEX Refueling Operations - Boron Concentration This report also contains the necessary figures which give the limits for the above listed parameters.

Terms appearing in capitalized type are DEFINED TERMS as defined in Section 1.0 of the Technical Specifications.

This report is prepared in accordance with the requirements of Technical Specification 6.9.1.11.

St. Lucie Unit 2 Cycle 10 COLR, Rev 0 Page 3 of 14

2.0 CORE OPERATING LIMITS 2.1 Moderator Tem erature oefficien (TS 3.1.1.4)

The moderator temperature coefficient (MTC) shall be less negative than -30 pcml'F at RATED THERMAL POWER.

2.2 EA Position - Misali nmen > 1 I ches (TS 3.1.3.1)

The time constraints for full power operation with one full-length CEA misaligned from any other CEA in its group by more than 15 inches are shown in Figure 3.1-1a.

2.3 Re ulatin EA I sertion Limits (TS 3.1.3.6)

The regulating CEA groups shall be limited to the withdrawal sequence and to'the insertion limits shown on Figure 3.1-2, with CEA insertion between the Long Term Steady State Insertion Limits and the Power Dependent Insertion Limits restricted to:

a. Less than or equal to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> per 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> interval,
b. Less than or equal to 5 Effective Full Power Days per 30 Effective Full Power Days, and
c. Less than or equal to 14 Effective Full Power Days per calendar year.

2.4 ~DN 2 tTS 2.2.14 The linear heat rate shall not exceed the limits shown on Figure 3.2-1.

The AXIALSHAPE INDEX power dependent control limits are shown on Figure 3.2-2.

During operation, with the linear heat rate being monitored by the E core Detector

~Mi I t,th AXIANSNAPE INDEX h Ilh I t I d ttht th of Figure 3.2-2.

During operation, with the linear heat rate being monitored by the Incore Detector

~M>> t,th 2 IP D Ity I thtt hilt dt tdt less than or equal to the limits shown on Figure 3.2-1.

St. Lucie Unit 2 Cycle 10 COLR Rey 0 Page 4 of 14

2.5 T TAL PLANAR RADIAL PEAKIN F TOR -F T (TS 3.2.2)

The calculated value of F~T shall be limited to < 1.75.

The power dependent F T limits are shown on Figure 3.2-3.

2.6 T L INTEGRATED RADIAL PEAKIN FA TOR - F (TS 3.2.3)

The calculated value of F,T shall be limited to < 1.70.

The power dependent F, limits are shown on Figure 3.2-3.

2.7 DNB Parameters - AXIAL HAPE INDE (TS 3.2.5)

The AXIALSHAPE INDEX shall be maintained within the limits specified in Figure 3.2-4.

2.8 . efuelin 0 erations - Boron onc n ra io (TS 3.9.1)

With the reactor vessel head closure bolts less than fully tensioned or with the head removed, the boron concentration of all filled portions of the Reactor Coolant System and the refueling canal shall be maintained uniform and sufficient to ensure that the more restrictive of the following reactivity conditions is met:

a. Either a K,<<of 0.95 or less, or
b. A boron concentration of greater than or equal to 1720 ppm.

St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 5 of 14

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1.72 I.7 1.68 1.66

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BOL CYCLE LIFE EOL (Fuel + Clad + Moderator)

FIGURE 3.2-1 Allowable Peak Linear Heat Rate vs. Burnup St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 8 of 14

1.1 0 1 UNACCEPTABLE OPERATION REGION L

o 0.9

(-0.10,0.88) (0.15,0.88)

~ 0.8 E ACCEPTABLE 0.7 OPERATION X REGION o 0.6 (-0.50,0.60) (0.50,0.60) 0 0.5 0.4

-0.6 -0.4 -0.2 0 0.2 0.4 0.6 Peripheral AXIALSHAPE INDEX (Not Applicable Below 40% Power)

FIGURE 3.2-2 AXIAL'SHAPE INDEX vs, Maximum Allowable Power Level St. Lucie Unit 2 Cycle )0 COLR Rev 0 Page 9 of 14

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0 OPERATION OPERATION 0.9 REGION REGION ~

ACCEPTABLE OPERATION

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(-0.50,0.65) (0.50,0.65) 0 o 06 0.5 0.4

-0.6 -0.4 -0.2 0 0.2 0.4 0.6 Peripheral AXIALSHAPE INDEX (Y1)

(Not Applicable Below 40% Power)

FIGURE 3.2-4 AXIALSHAPE INDEX Oper'ating Limits vs. THERMAL POWER (Four Reactor Coolant Pumps Operating)

St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 11 of 14

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3.0 LIST OF APPROVED METHODS The analytical methods used to determine the core operating limits are those previously approved by the NRC, and are listed below.

WCAP-11596-P-A, "Qualification of the PHOENIX-P/ANC Nuclear Design System for Pressurized Water Reactor Cores," June 1988 (Westinghouse Proprietary)

2. NF-TR-95-01, "Nuclear Physics Methodology for Reload Design of Turkey Point 8 St. Lucie Nuclear Plants," Florida Power & Light Company, January 1995 (NRC SER dated June 9, 1995), 8 Supplement 1, August 1997
3. CENPD-199-P, Rev. 1-P-A, "C-E Setpoint Methodology: CE Local Power Density and DNB LSSS and LCO Setpoint Methodology for Analog Protection Systems,"

January 1986 4.. CENPD-266-P-A, "The ROCS and DIT Computer Code for Nuclear Design," April 1983

5. CENPD-275-P-A, "C-E Methodology for Core Designs Containing Gadolinia-Urania Burnable Absorbers," May 1988
6. CENPD-188-A, "HERMITE: A Multi-Dimensional Space - Time Kinetics Code for PWR Transients,: July 1976
7. CENPD-153-P, Rev. 1-P-A, "Evaluation of Uncertainty in the Nuclear Power Peaking Measured by the Self-Powered, Fixed Incore Detector System," May 1980
8. CEN-123(F)-P, "Statistical Combination of Uncertainties Methodology Part 1: C-E Calculated Local Power Density and Thermal Margin/Low Pressure LSSS for Calvert Cliffs Units I and II," December 1979
9. CEN-123(F)-P, "Statistical Combination of Uncertainties Methodology Part 2:

Combination of System Parameter Uncertainties in Thermal Margin Analyses for Calvert Cliffs Units 1 and 2," January 1980

10. CEN-123(F)-P, "Statistical Combination of Uncertainties Methodology Part 3: C-E Calculated Departure from Nucleate Boiling and Linear Heat Rate Limiting Conditions for Operation for Calvert Cliffs Units 1 and 2," February 1980 CEN-191(B)-P, "CETOP-D Code Structure and Modeling Methods for Calvert Cliffs Units 1 and 2," December 1981
12. Letter, J. W. Miller (NRC) to J. R. Williams, Jr. (FPL), Docket No. 50-389, Regarding St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 12 of 14

C Unit 2 Cycle 2 License Approval (Amendment No. 8 to NPF-16 and SER),

November 9, 1984 (Approval of CEN-123(F)-P (three parts) and CEN-191(B)-P)

13. CEN-371(F)-P, "Extended Statistical Combination of Uncertainties,".July 1989
14. Letter, J. A. Norris (NRC) to J. H. Goldberg (FPL), Docket No. 50-389, "St. Lucie Unit 2- Change to Technical Specification Bases Sections '2.1.1 Reactor Core'nd

'3/4.2.5 DNB Parameters'TAC No. M87722)," March 14, 1994 (Approval of CEN-371(F)-P)

15. CENPD-161-P-A, "TORC Code, A Computer Code for Determining the Thermal Margin of a Reactor Core," April 1986
16. CENPD-162-P-A, "Critical Heat Flux Correlation for C-E Fuel Assemblies with Standard Spacer Grids Part 1, Uniform Axial Power Distribution," April 1975
17. CENPD-207-P-A, "Critical Heat Flux Correlation for C-E Fuel Assemblies with Standard Spacer Grids Part 2, Non-uniform Axial Power Distribution," December 1984
18. CENPD-206-P-A, "TORC Code, Verification and Simplified Modeling Methods,"

June 1981

19. CENPD-225-P-A, "Fuel and Poison Rod Bowing," June 1983
20. CENPD-139-P-A, "C-E Fuel Evaluation Model Topical Report," July 1974
21. CEN-161(B)-P-A, "Improvements to Fuel Evaluation Model," August 1989
22. CEN-161(B)-P, Supplement 1-P-A, "Improvements to Fuel Evaluation Model,"

January 1992

23. CENPD-132, Supplement 3-P-A, "Calculative Methods for the C-E Large Break LOCA Evaluation Model for the Analysis of C-E and W Designed NSSS," June 1985
24. CENPD-133, Supplement 5-A, "CEFLASH-4A, A FORTRAN77 Digital Computer Program for Reactor Blowdown Analysis," June 1985
25. CENPD-134, Supplement 2-A, "COMPERC-II, a Program for Emergency Refill-Reflood of the Core," June 1985
26. CENPD-135-P, Supplement 5, "STRIKIN-II,A Cylindrical Geometry Fuel Rod Heat Transfer Program," April 1977
27. Letter, R. L. Baer (NRC) to A. E. Scherer (CE), "Evaluation of Topical Report St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 13 of 14

i.r 4i 0

CENPD-135, Supplement ¹5," September 6, 1978

28. CENPD-137, Supplement 1-P, "Calculative Methods for the C-E Small Break LOCA Evaluation Model," January 1977
29. CENPD-133, Supplement 3-P, "CEFLASH-4AS, A Computer Program for the Reactor Blowdown Analysis of the Small Break Loss of Coolant Accident," January 1977
30. Letter, K. Kniel (NRC) to A. E. Scherer (CE), "Evaluation of Topical Reports CENPD-133, Supplement 3-P and CENPD-137, Supplement 1-P," September 27, 1977
31. CENPD-138, Supplement 2-P, "PARCH, A FORTRAN-IV Digital Program to Evaluate Pool Boiling, Axial Rod and Coolant Heatup," January 1977
32. Letter, C. Aniel (NRC) to A. E. Scherer (CE), "Evaluation of Topical Report CENPD-138, Supplement 2-P," April 10, 1978
33. Letter, W. H. Bohlke (FPL) to Document Control Desk (NRC), "St. Lucie Unit 2, Docket No. 50-389, Proposed License Amendment, T han e f om - c o

+/erg," L-91-325, December 17, 1991

34. Letter, J. A.Plorris (NRC) to J. H. Goldberg (FPL), "St. Lucie Unit 2 - Issuance of Amendment Re: Moderator Temperature Coefficient (TAC No. M82517)," July 15, 1992 35.

8 8 t ~ .88-888, 8 8 June 4, 1984 d tt 8 d t, ~td,"

Letter, J. W. Williams, Jr. (FPL) to D. G. Eisenhut (NRC), "St. Lucie Unit No. 2, I=84-448.

36. Letter, J. R. Miller (NRC) to J. W. Williams, Jr. (FPL), Docket No. 50-389, Regarding

'Unit 2 Cycle 2 License Approval (Amendment No. 8 to NPF-16 and SER),

November 9, 1984 (Approval of Methodology contained in L-84-148)

37. Letter, A. E. Scherer Enclosure 1-P to LD-82-001, "CESEC-Digital Simulation of a Combustion Engineering Nuclear Steam Supply System," December 1981 38.. Safety Evaluation Report, "CESEC Digital Simulation of a Combustion Engineering Steam Supply System (TAC No.: 01142)," October 27, 1983
39. CENPD-282-P-A, Volumes 1, 2, and 3, Supplement 1-P, "Technical Manual for the CENTS Code," March 1994 St. Lucie Unit 2 Cycle 10 COLR Rev 0 Page 14 of 14
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