Text

Core Operating Limits Report
	ML16116A218
Person / Time
Site:	Turkey Point
Issue date:	04/14/2016
From:	Summers T; Florida Power & Light Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	L-2016-081
	Download: ML16116A218 (11)
	v • d • e

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APR 1 4 2016 L-2016-081 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 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 4. The COLR is applicable for Unit 4 Cycle 29.

Should there be any questions, please contact Mr. Mitch Guth, Licensing Manager, at 305-246:.6698.

Sincerely, z-l~

Thomas Summers 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-2016-081 Page 1 of 10 Turkey Point Unit 4 Cycle 29 Core Operating Limits Report (COLR) 14B-A1

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Attachment to L-2016-081 Page 2of10 TURKEY POINT UNIT 4 CYCLE 29 COLR

1.0 INTRODUCTION

This Core Operating Limits Report (COLR) for Turkey Point Unit 4 Cycle 29 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 148-A3 2.2 2.2.1 Reactor Trip System Instrumentation Setpoints, Table 2.2-1, Notes 1 & 3 148-A3-14B-A4 2.3 3.1.1.1 Shutdown Margin Limit for MODES 1, 2, 3, 4 148-A4 2.4 3.1.1.2 Shutdown Margin Limit for MODE 5 148-A4 2.5 3.1.1.3 Moderator Temperature Coefficient 148-A5 2.6 4.1.1.3 MTC Surveillance at 300 ppm 148-A5 2.7 3.1.3.2 Analog Rod Position Indication System 148-A5 2.8 3.1.3.6 Control Rod Insertion Limits 148-A5 2.9 3.2.1 Axial Flux Difference 148-A5 2.10 3.2.2 Heat Flux Hot Channel Factor F0 (Z) 148-A5 2.11 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor 148-A5 2.12 3.2.5 DNB Parameters 148-A6 Figure Description A1 Reactor Core Safety Limit - Three Loops in Operation 148-A7 A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration 14B-A8 A3 Turkey Point Unit 4 Cycle 29 Rod Insertion Limits vs Thermal Power 148-A9 A4 Axial Flux Difference as a Function of Rated Thermal Power 148-A10 148-A2

Attachment to L-2016-081 Page 3of10 TURKEY POINT UNIT 4 CYCLE 29 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 NRG-approved methodologies specified in TS 6.9.1.7.

2.1 Reactor Core Safety Limits - Three Loops in Operation (TS 2.1.1)

Figure A 1(page 14B-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 A1.

2.2 Reactor Trip System Instrumentation Setpoints (TS 2.2.1)

NOTE 1 on TS Table 2.2-1 Overtemperature ~T 1:1 =Os, 1:2 =Os Lead/Lag compensator on measured ~T i; 3 = 2s Lag compensator on measured ~T K1=1.31 K2 = 0.023/°F 1:4 = 25s, 'ts = 3s Time constants utilized in the lead-lag compensator for Tavg Lag compensator on measured Tavg T' :=:;; 583.0 °F Indicated Loop Tavg at RATED THERMAL POWER Ks= 0.00116/psi \

P' ;::: 2235 psig Nominal RCS operating pressure f1 (~1) = 0 for qt-qb between - 18% and+ 7%

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

the ~T 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 ~T 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 qi + qb is total THERMAL POWER in percent of RATED THERMAL POWER 14B-A3

Attachment to L-2016-081 Page 4of10 TURKEY POINT UNIT 4 CYCLE 29 COLR NOTE 2 on TS Table 2.2-1 Overtemperature LiT (Not affected by COLR. included for completeness)

The Overtemperature LiT function Allowable Value shall not exceed the nominal trip setpoint by more than 0.5% AT span for the LiT channel, 0.2% LiT span for the Pressurizer Pressure channel, and 0.4% LiT span for the f(Lil) channel. No separate Allowable Value is provided for Tavg because this function is part of the LiT value.

NOTE 3 on TS Table 2.2-1 Overpower LiT

~ =1.10 Ks ~ 0.0/°F For increasing average temperature Ks= 0.0 F=or decreasing average temperature

7 ~ 0s Time constants utilized in the lead-lag compensator for T avg K6 =0.0016/°F For T > T" Ka = 0.0 For T :::;; T" T":::;; 583.0°F Indicated Loop Tavg at RATED THERMAL POWER f2 (Lil) =0 For all Lil NOTE 4 on TS Table 2.2-1 Overpower LiT (Not affected by COLR. included for completeness)

The Overpower LiT function Allowable Value shall not exceed the nominal trip setpoint by more than 0.5% LiT span for the LiT channel. No separate Allowable Value is provided for T avg because this function is part of the LiT value.

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

Figure A2 (page 148-AB) 2.4 Shutdown Margin Limit for MODE 5 (TS 3.1.1.2)

~ 1.77% Lik/k 14B-A4

Attachment to L-2016-081 Page 5of10 TURKEY POINT UNIT 4 CYCLE 29 COLR 2.5 Moderator Temperature Coefficient (MTC) (TS 3.1.1.3)

~ + 5.0 X 10-5 ~k/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 ~k/k/°F to~ o.o x 10-5 ~k/k/°F Less negative than - 41.0 x 10-5 ~k/k/°F EOL, RTP, ARO 2.6 MTC Surveillance at300 ppm (TS 4.1.1.3)

Less negative than - 35.0 x 10-5 ~k/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 14B-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 14B-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 14B-A10) 2.10 Heat Flux Hot Channel Factor FQ(Z) (TS 3.2.2)

[Fa]L = 2.30 K(z) =1.0 For O' ~ z ~ 12' where z is core height in ft 2.11 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.3)

FLilTP = 1.600 PFLiH ::;: 0.3 14B-A5 )

Attachment to L-2016-081 Page 6 of 10 TURKEY POINT UNIT 4 CYCLE 29 COLR 2.12 DNB Parameters (TS 3.2.5)

RCS Tavg ~ 585.0°F Pressurizer Pressure ~ 2204 psig 14B-A6

Attachment to L-2016-081 Page 7of10 TURKEY POINT UNIT 4 CYCLE 29 COLR 2455 psla 540 - - - - - - - t - - - - - - - - + - - - - - t - - - - - + - - - - - - - ;

0.0 0.2 o.4 0.6 0.8 1.0 1.2 1.4 Core Power {fraction of 2644 MWt)

FIGURE A1 Reactor Core Safety Limit- Three Loops in Operation 14B-A7

Attachment to L-2016-081 Page 8of10 TURKEY POINT UNIT 4 CYCLE 29 COLR FIGUREA2 Required Shutdown Margin vs Reactor Coolant Boron Concentration z

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0 500 1000 1500 2000 RCS BORON CbNCENTRATION (PPM) 14B-A8

Attachment to L-2016-081 Page 9of10 TURKEY POINT UNIT 4 CYCLE 29 COLR FIGUREA3 Turkey Point Unit 4 Cycle 29 Rod Insertion Limits vs Thermal Power

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Attachment to L-2016-081 Page 10of10 TURKEY POINT UNIT 4 CYCLE 29 COLR FIGUREA4 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 4 Cycle 29 120

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