L-2014-069, Core Operating Limits Report

Core Operating Limits Report

ML14106A018
Person / Time
Site:	Turkey Point
Issue date:	03/26/2014
From:	Kiley M Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2014-069
Download: ML14106A018 (11)

Text

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MAR 2 6 2014 L-2014-069 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. The COLR is applicable for Unit 3 Cycle 27.

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 344 St Homestead, FL 33035

Attachment to L-2014-069 Page 1 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR Turkey Point Unit 3 Cycle 27 Core Operating Limits Report (COLR) 14A-A1

Attachment to L-2014-069 Page 2 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR

1.0 INTRODUCTION

This Core Operating Limits Report for Turkey Point Unit 3 Cycle 27 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, Table 2.2-1, Notes 1 & 3 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 FQ(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 27 Rod Insertion Limits vs Thermal Power 14A-A9 A4 Axial Flux Difference as a Function of Rated Thermal Power 14A-A10 14A-A2

.4 Attachment to L-2014-069 Page 3 of 10 TURKEY POINT UNIT 3 CYCLE 27 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 OvertemDerature AT Tl = OS, T 2 = OS Lead/Lag compensator on measured AT T3 = 2s Lag compensator on measured AT K1 = 1.31 K2 = 0.023/OF

- 4= 25s, T5 = 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' _ 2235 psig Nominal RCS operating pressure fl(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

• ., s Attachment to L-2014-069 Page 4 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR NOTE 2 on TS Table 2.2-1 Overtemperature AT (Not affected by COLR,included for completeness)

The Overtemperature AT function Allowable Value 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% AT span 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

- K5 = 0.0 For decreasing average temperature

- T7Ž05S Time constants utilized in the lead-lag compensator for Tavg

- K6 0. 00 16/1F For T > T"

- K 6 0-0 For T < T"

- T":!*583.OOF Indicated Loop Tavg at RATED THERMAL POWER

- f2 (Al)= 0 For all Al NOTE 4 on TS Table 2.2-1 Overpower AT (Not affected by COLR, included for completeness)

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

Attachment to L-2014-069 Page 5 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR 2.5 Moderator Temperature Coefficient (MTC) (TS 3.1.1.3)

- < +5.O0Xl10 5 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 10s Ak/k/°F

- Less negative than - 41.0 x 10s Ak/k/°F EOL, RTP, ARO 2.6 MTC Surveillance at 300 ppm (TS 4.1.1.3)

- Less negative than - 35.0 x 10- 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 230 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 =230 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

Attachment to L-2014-069 Page 6 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR 2.11 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.3)

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

- RCS Tavg < 585.0 OF

- Pressurizer Pressure > 2204 psig 14A-A6

a W.

Attachment to L-2014-069 Page 7 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR 660 640 620 E

I-,,

0 o 600 "T"

500 54()

1,4 Core Power (fraction of 2644 MWt)

FIGURE Al Reactor Core Safety Limit - Three Loops in Operation 14A-A7

A Attachment to L-2014-069 Page 8 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR FIGURE A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration 2

(0.0, 1.77)

A

.1 1.5 z

z 1

=

0 w

U_

0.. 0.5 0

0 500 1000 50.0 2000 RCS BORON CONCENTRATION (PPM) 14A-A8

Attachment to L-2014-069 Page 9 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR FIGURE A3 Turkey Point Unit 3 Cycle 27 Rod Insertion Limits vs Thermal Power ARO = 230 Steps Withdrawn, Overlap = 102 Steps 230 264.5, 30) 220 210 190 180 170 (100. 71) 160 150 BnC 140 2 130 120 0.

110 (0, 05) 100 0.

90 80 C.) B nk D C) 70 60 50 40 30 20 10 0

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

Attachment to L-2014-069 Page 10 of 10 TURKEY POINT UNIT 3 CYCLE 27 COLR FIGURE A4 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 3 Cycle 27 120

(-9,- 00) (+5,10()

100 0 80 0.

UNAC EPTABLE U ACCEPTA LE

-I OPE RATION OPERATION 60

(-30,50) ACCEPTA LE (+2050)

IL OPERATI N 40 20 0

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

14A-A10