L-2012-356, Revised Core Operating Limits Report

Revised Core Operating Limits Report

ML12292A569
Person / Time
Site:	Turkey Point
Issue date:	10/03/2012
From:	Kiley M Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2012-356
Download: ML12292A569 (10)

Text

0 FPL.POWERING TODAY.EMPOWERING TOMORROW.0 Florida Power & Light Company, 9760 S.W. 344 Street, Florida City, FL 33035 OCT 0 3 2012 L-2012-356 10 CFR 50.36 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555-0001 Re: Turkey Point Unit 4 Docket No. 50-251 Revised Core Operating Limits Report

References:

1. Letter from M. Kiley (FPL) to U.S. Nuclear Regulatory Commission (L-2012-180),"Turkey Point Unit 4 Revised Core Operating Limits Report," April 21, 2012.2. Letter from M. Kiley (FPL) to U.S. Nuclear Regulatory Commission (L-2012-355),"Turkey Point Unit 4, Nuclear Fuel Pellet Thermal Conductivity Degradation Impact on Current Turkey Point Unit 4 Cycle 26 BE LOCA Analysis Using the 1996 CQD Methodology

-10 CFR 50.46 30-Day Special Report," October 3, 2012.Florida Power & Light (FPL) letter L-2012-180 (Reference 1), submitted a revision to the Unit 4 Cycle 26 Core Operating Limits Report (COLR) due to implementation of Amendment 243.In accordance with Technical Specification 6.9.1.7, the attached revised Core Operating Limits Report (COLR) is provided for Turkey Point Unit 4 Cycle 26, superseding the COLR transmitted by Reference

1. The revision to the Turkey Point Unit 4 Cycle 26 COLR includes changes to accommodate the impact of the fuel pellet thermal conductivity degradation (TCD)as described in Reference 2.Should there be any questions, please contact Robert Tomonto, Licensing Manager, at 305-246-7327.

Very truly yours, Michael Kiley Site Vice President Turkey Point Nuclear Plant Attachment cc: Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant A AU01 1\3 X-, an FPL Group company Attachment to L-2012-356 Page 1 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR Appendix A Revised Turkey Point Unit 4 Cycle 26 Core Operating Limits Report (COLR)14B-A1 Attachment to L-2012-356 Page 2 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR

1.0 INTRODUCTION

This Core Operating Limits Report for Turkey Point Unit 4 Cycle 26 has been prepared in accordance with the requirements of Technical Specification 6.9.1.7.The Technical Specifications (TS) affected by this report are listed below with the section and page for each one of the TS addressed in this COLR document.Section Technical Specification 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.1.1 2.2.1 3.1.1.1 3.1.1.2 3.1.1.3 4.1.1.3 3.1.3.2 3.1.3.6 3.2.1 3.2.2 3.2.3 3.2.5 Reactor Core Safety Limits Reactor Trip System Instrumentation Setpoints, Table 2.2-1, Notes 1 & 3 Shutdown Margin Limit for MODES 1, 2, 3, 4 Shutdown Margin Limit for MODE 5 Moderator Temperature Coefficient MTC Surveillance at 300 ppm Analog Rod Position Indication System Control Rod Insertion Limits Axial Flux Difference Heat Flux Hot Channel Factor FQ(Z)Nuclear Enthalpy Rise Hot Channel Factor DNB Parameters Description Reactor Core Safety Limit -Three Loops in Operation Required Shutdown Margin vs Reactor Coolant Boron Concentration Turkey Point Unit 4 Cycle 26 Rod Insertion Limits vs Thermal Power Axial Flux Difference as a Function of Rated Thermal Power Page 14B-A3 14B-A3-14B-A4 14B-A4 14B-A4 14B-A4 14B-A4 14B-A5 14B-A5 14B-A5 14B-A5 14B-A5 14B-A5 14B-A6 14B-A7 14B-A8 14B-A9 Figure Al A2 A3 A4 14B-A2 Attachment to L-2012-356 Page 3 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR 2.0 OPERATING LIMITS The cycle-specific parameter limits for the specifications listed in the Introduction are presented below and listed sequentially by Technical Specification (TS). These limits have been developed using the NRC-approved methodologies specified in TS 6.9.1.7.2.1 Reactor Core Safety Limits -Three Loops in Operation (TS 2.1.1)-Figure Al (page 14B-A6)In Modes 1 and 2, the combination of Thermal Power, reactor coolant system highest loop average temperature and pressurizer pressure shall not exceed the limits in Figure Al.2.2 Reactor Trip System Instrumentation Setpoints (TS 2.2.1)NOTE 1 on TS Table 2.2-1 Overtemperature AT-'13=05OS=O Lead/Lag compensator on measured AT Lag compensator on measured AT-K, =1.24-K 2 =0.017/1F-14 =2 5 s,t5- = 3s-T6 0s-T' < 577.2 OF-K 3= 0.0011psig Time constants utilized in the lead-lag compensator for Tavg Lag compensator on measured Tavg Nominal Tavg at RATED THERMAL POWER P' _ 2235 psig Nominal RCS operating pressure fd(Al) = 0 for qt -qb between -50% and + 2%.For each percent that the magnitude of qt -qb exceeds -50%, the AT Trip Setpoint shall be automatically reduced by 0.0%of its value at RATED THERMAL POWER; and For each percent that the magnitude of qt -qb exceeds + 2%, the AT Trip Setpoint shall be automatically reduced by 2.19%of its value at RATED THERMAL POWER.Where qt and qb are percent RATED THERMAL POWER in the top and bottom halves of the core respectively, and qt + qb is total THERMAL POWER in percent of RATED THERMAL POWER.14B-A3 Attachment to L-2012-356 Page 4 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR NOTE 3 on TS Table 2.2-1 Overpower AT-K 4 1.10-K 5 -0.02/-F For increasing average temperature

-K 5 = 0.0 For decreasing average temperature

-"7 > 10 S Time constants utilized in the lead-lag compensator for Tavg-K 6 0.00161°F ForT>T"-K 6 0.0 For T < T"-T" _< 577.2 0 F Nominal Tavg at RATED THERMAL POWER-f 2 (AI) = 0 For allAl 2.3 Shutdown Margin Limit for MODES 1, 2, 3 and 4 (TS 3.1.1.1)-Figure A2 (page 14B-A7)2.4 Shutdown Margin Limit for MODE 5 (TS 3.1.1.2)-> 1% Ak/k 2.5 Moderator temperature coefficient (MTC) (TS 3.1.1.3)-< + 5.0 x 105 Ak/k/OF BOL, HZP, ARO and from HZP to 70% Rated Thermal Power (RTP)-From 70% RTP to 100% RTP the MTC decreasing linearly from < + 5.0 x 10 5 Ak/k/°F to < 0.0 x 10-5 Ak/k/°F-Less negative than -35.0 x 10.5 Ak/k/°F EOL, RTP, ARO 2.6 Moderator temperature coefficient (MTC) Surveillance at 300 ppm (TS 4.1.1.3)-Less negative than -30.0 x 10-5 Ak/k/OF Within 7 EFPD of reaching equilibrium boron concentration of 300 ppm.14B-A4 Attachment to L-2012-356 Page 5 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR 2.7 Analog Rod Position Indication System (TS 3.1.3.2)-Figure A3 (page 14B-A8)The All Rods Out (ARO) position for all shutdown Banks and Control Banks is defined to be 228 steps withdrawn.

2.8 Control Rod Insertion Limits (TS 3.1.3.6)-Figure A3 (page 14B-A8) The control rod banks shall be limited in physical insertion as specified in Figure A3 for ARO =228 steps withdrawn.

2.9 Axial Flux Difference (TS 3.2.1)-Figure A4 (page 14B-A9)2.10 Heat Flux Hot Channel Factor-[FQ]L= 2.47-K(z) = 1.0 (TS 3.2.2)For 0' < z < 12' where z is core height in ft 2.11 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.3)-FAHRTP = 1.63-PFAH = 0.3 2.12 DNB Parameters (TS 3.2.5)-RCS Tavg < 581.2 OF-Pressurizer Pressure > 2200 psig 14B-A5 Attachment to L-2012-356 Page 6 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR 680 670..660 650 640 ,630 620 610 600 590 580 570 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Power (fraction of nominal)1 1.1 1.2 FIGURE Al Reactor Core Safety Limit -Three Loops in Operation 14B-A6 Attachment to L-2012-356 Page 7 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR 2.0 (0.0,1.77) 4 z C5 V0 1.5 1.0 HIM [111 1111 IXI I I 1\ I J I IX I I I N I I ACCEPTABLE OPERATION I I I I N 11 1 1 1 1- 1 1 1 1 1 1 1 I I I I N I I I I I I I I I I I I N I I I I I I 1 1 1(750,1.0).

1 1 1 1 1 1 I -.-Lj -F -T-TT--- lill 7 I =T 0.5 0.0 0'500 1000 1500 2000 FIGURE A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration 14B-A7 Attachment to L-2012-356 Page 8 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR FIGURE A3 Turkey Point Unit 4 Cycle 26 Rod Insertion Limits vs Thermal Power ARO = 228 Steps Withdrawn, Overlap = 100 Steps 0 U)a-230 220 210 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 Percent Reactor Power 70 80 90 100 14B-A8

• e Attachment to L-2012-356 Page 9 of 9 TURKEY POINT UNIT 4 CYCLE 26 COLR FIGURE A4 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 4 Cycle 26 120 0 80-J 0)20 0o--50-40 20 -10 0 10 20 30 40 50 AMal Rlu Differen (0/4 14B-A9