L-2012-258, Core Operating Limits Report

Core Operating Limits Report

ML12187A164
Person / Time
Site:	Turkey Point
Issue date:	06/22/2012
From:	Kiley M Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2012-258
Download: ML12187A164 (11)

Text

0FPL.

JUN 2 2 2012 L-2012-258 10 CFR 50.36 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555-0001 Re: Turkey Point Unit 3 Docket No. 50-250 Core Operating Limits Report In accordance with Technical Specification 6.9.1.7, the attached Core Operating Limits Report (COLR) is provided for Turkey Point Unit 3. These curves are applicable for Unit 3 Cycle 26.

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 Florida Power & Light Company 9760 SW 3 4 4th St., Homestead, FL 33035

TURKEY POINT UNIT 3. CYCLE 26 COLR Appendix A Turkey Point Unit 3 Cycle 26 Core Operating Limits Report (COLR) 14A-A1

TURKEY POINT UNIT 3 CYCLE 26 COLR

1.0 INTRODUCTION

This Core Operating Limits Report for Turkey Point Unit 3 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 Page 2.1 2.1.1 Reactor Core Safety Limits 14A-A3 2.2 2.2.1 Reactor Trip System Instrumentation Setpoints 14A-A3-14A-A4 2.3 3.1.1.1 Shutdown Margin Limit for MODES 1, 2, 3, 4 14A-A4 2.4 3.1.1.2 Shutdown Margin Limit for MODE 5 14A-A4 2.5 3.1.1.3 Moderator Temperature Coefficient 14A-A5 2.6 4.1.1.3 MTC Surveillance at 300 ppm 14A-A5 2.7 3.1.3.2 Analog Rod Position Indication System 14A-A5 2.8 3.1.3.6 Control Rod Insertion Limits 14A-A5 2.9 3.2.1 Axial Flux Difference 14A-A5 2.10 3.2.2 Heat Flux Hot Channel Factor Fa(Z) 14A-A5 2.11 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor 14A-A6 2.12 3.2.5 DNB Parameters 14A-A6 Figure Description Al Reactor Core Safety Limit - Three Loops in Operation 14A-A7 A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration 14A-A8 A3 Turkey Point Unit 3 Cycle 26 Rod Insertion Limits vs Thermal Power 14A-A9 A4 Axial Flux Difference as a Function of Rated Thermal Power 14A-A10 14A-A2

TURKEY POINT UNIT 3 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 14A-A7) 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

- T1 = OS, T2 = OS Lead/Lag compensator on measured AT

- T3 = 2s Lag compensator on measured AT

- K, =1.31

- K2 = 0.023/°F

- "4 = 25s, Ts = 3s Time constants utilized in the lead-lag compensator for Tavg

- T6 = 2s Lag compensator on measured Tavg

- T' < 583.0 OF Indicated Loop Tavg at RATED THERMAL POWER

- K3 = 0.00116/psi

- P'Ž 2235 psig Nominal RCS operating pressure

- fd(AI) = 0 for qt - qb between - 18% and + 7%.

For each percent that the magnitude of qt - qb exceeds - 18%,

the AT Trip Setpoint shall be automatically reduced by 3.51%

of its value at RATED THERMAL POWER; and For each percent that the magnitude of qt - qb exceeds +7%,

the AT Trip Setpoint shall be automatically reduced by 2.37%

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.

14A-A3

TURKEY POINT UNIT 3 CYCLE 26 COLR NOTE 2 on TS Table 2.2-1 Overtemperature AT The Overtemperature AT function AllowableValue shall not exceed the nominal trip setpoint by more than 0.5% AT span for the AT channel, 0.2% AT span for the Pressurizer Pressure channel, and 0.4% ATspan for the f(AI) channel. No separate Allowable Value is provided for Tavg because this function is part of the AT value.

NOTE 3 on TS Table 2.2-1 Overpower AT

- K4 = 1.10

- K5 > 0.010 F For increasing average temperature

- Ks = 0.010 F For decreasing average temperature

- T7 2- 0 S Time constants utilized in the lead-lag compensator for Tavg

- K6 = 0.001 6/°F For T > T"

- K 6 = 0.0 ForT <T"

- T" _<583.0°F Indicated Loop Tavg at RATED THERMAL POWER

- f 2 (AI) = 0 For all Al NOTE 4 on TS Table 2.2-1 Overpower AT The Overpower AT function Allowable Value shall not exceed the nominal trip setpoint by more than 0.5% AT span for the AT channel. No separate Allowable Value is provided for Tavg because this function is part of the AT value.

2.3 Shutdown Margin Limit for MODES 1, 2, 3 and 4 (TS 3.1.1.1)

Figure A2 (page 14A-A8) 2.4 Shutdown Margin Limit for MODE 5 (TS 3.1.1.2)

- >1.77%Ak/k 14A-A4

TURKEY POINT UNIT 3 CYCLE 26 COLR 2.5 Moderator temperature coefficient (MTC) (TS 3.1.1.3)

- < + 5.0 x 105 Ak/k/°F 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/OF

- Less negative than -41.0 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 - 35.0 x 10-5 Ak/k/°F Within 7 EFPD of reaching equilibrium boron concentration of 300 ppm.

2.7 Analog Rod Position Indication System (TS 3.1.3.2)

Figure A3 (page 14A-A9) The All Rods Out (ARO) position for all shutdown Banks and Control Banks is defined to be 229 steps withdrawn.

2.8 Control Rod Insertion Limits (TS 3.1.3.6)

Figure A3 (page 14A-A9) The control rod banks shall be limited in physical insertion as specified in Figure A3 for ARO =229 steps withdrawn.

2.9 Axial Flux Difference (TS 3.2.1)

- Figure A4 (page 14A-A10) 2.10 Heat Flux Hot Channel Factor FQ(Z) (TS 3.2.2)

- [FQ]L = 2.30

- K(z) =1.0 For 0' < z < 12' where z is core height in ft 14A-A5

TURKEY POINT UNIT 3 CYCLE 26 COLR 2.11 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.3)

- FAHRTP = 1.248 PFAH = 0.3 DRFA Fuel

- FAHRTP = 1.600 PFAH = 0.3 Upgrade Fuel 2.12 DNB Parameters (TS 3.2.5)

- RCS Tavg < 585.0 OF

- Pressurizer Pressure > 2204 psig 14A-A6

TURKEY POINT UNIT 3 CYCLE 26 COLR Figure Al Reactor Core Safety Limit - Three Loops in Operation C-03

0. r.l 3

U) 0 IM 0

540 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Core Power (fraction of 2644 MWt) 14A-A7

TURKEY POINT UNIT 3 CYCLE 26 COLR Figure A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration

~L.m ILUT7fl I uwrrrFoF _ I I I MODE 4 with no RCP in operation I (0.0, 1.77) 1.5 -1 MODE 1,, 2,i,_

3_and 4witha es

_ LLI I H II IIWJ I II I I III I llrii I z 1111 i L..L lili z 1 0 L *_.

75T0,1.0) _LUJ-----

I-0 CTJT-TLCJJW Inl IILI l l llll tl l l ll ll 1 171- l w

_=

0.5 I I JJJ~ I HI~I HHIIflTHL~*+/-I 111111 II [11 0

0 500 l000 2500 2000 RCS BORON CONCENTRATION (PPM) 14A-A8

TURKEY POINT UNIT 3 CYCLE 26 COLR FIGURE A3 Turkey Point Unit 3 Cycle 26 Rod Insertion Limits vs Thermal Power ARO = 229 Steps Withdrawn, Overlap = 101 Steps 230 64.0, 29) 210 .21 2A; 200 ___

190 180 170 __ __ __ __(100.171)

~160 _

S150 __ __ fBank C /

140__Bn U) 130__

2 120__ __ __

110__,*(0, 105) __ __

o B; nk D 30 ____

40/

20 30f P R r 20/

60 10 1412e 0 3 0 5 0 7 0 90 0/

0 10 20 30 40 50 60 70 80 90 100 Percent Reactor Power 14A-A9

TURKEY POINT UNIT 3 CYCLE 26 COLR FIGURE A4 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 3 Cycle 26 120

(-9,{00) (+5,10C) 100 0 80

-J UNACCEPTABLE U ACCEPTA LE OPE RATION PERATIOI wu 60

(-30,50) ACCEPTA OPERATION LE 4- (+2N1,50) 2 40 a.

20 0

-50 -40 -30 -20 -10 0 10 20 30 40 50 Axial Flux Difference (%)

14A-A10