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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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 APR 1 4 2016 L-2016-081 10 CFR 50.36 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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TURKEY POINT UNIT 4 CYCLE 29 COLR Attachment to L-2016-081 Page 2of10

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 2.1 2.1.1 2.2 2.2.1 2.3 3.1.1.1 2.4 3.1.1.2 2.5 3.1.1.3 2.6 4.1.1.3 2.7 3.1.3.2 2.8 3.1.3.6 2.9 3.2.1 2.10 3.2.2 2.11 3.2.3 2.12 3.2.5 Figure A1 A2 A3 A4 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 F0 (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 29 Rod Insertion Limits vs Thermal Power Axial Flux Difference as a Function of Rated Thermal Power 148-A2

. Page 148-A3 148-A3-14B-A4 148-A4 148-A4 148-A5 148-A5 148-A5 148-A5 148-A5 148-A5 148-A5 148-A6 148-A7 14B-A8 148-A9 148-A10

TURKEY POINT UNIT 4 CYCLE 29 COLR 2.0 OPERATING LIMITS Attachment to L-2016-081 Page 3of10 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 T avg T' :=:;; 583.0 °F Indicated Loop Tavg at RATED THERMAL POWER Ks= 0.00116/psi

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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 RA TED 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 RA TED THERMAL POWER Where qt and qb are percent RA TED THERMAL POWER in the top and bottom halves of the core respectively, and qi + qb is total THERMAL POWER in percent of RA TED THERMAL POWER 14B-A3

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

The Overtemperature Li T function Allowable Value shall not exceed the nominal trip setpoint by more than 0.5% AT span for the Li T channel, 0.2% Li T span for the Pressurizer Pressure channel, and 0.4% Li T span for the f(Lil) channel. No separate Allowable Value is provided for T avg because this function is part of the Li T 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 ~ 0 s 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 f 2 (Lil) = 0 For all Lil NOTE 4 on TS Table 2.2-1 Overpower LiT (Not affected by COLR. included for completeness)

The Overpower Li T function Allowable Value shall not exceed the nominal trip setpoint by more than 0.5% Li T span for the Li T channel. No separate Allowable Value is provided for T avg because this function is part of the Li T 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 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 2.6 MTC Surveillance at300 ppm (TS 4.1.1.3)

Less negative than - 35.0 x 10-5 ~k/k/°F 2.7 Analog Rod Position Indication System (TS 3.1.3.2)

BOL, HZP, ARO, and from HZP to 70% Rated Thermal Power (RTP)

EOL, RTP, ARO Within 7 EFPD of reaching equilibrium boron concentration of 300 ppm.

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

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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 6 of 10

TURKEY POINT UNIT 4 CYCLE 29 COLR 2455 psla Attachment to L-2016-081 Page 7of10 540 ----1-----t-----1-----+-----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

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0 TURKEY POINT UNIT 4 CYCLE 29 COLR FIGUREA2 Required Shutdown Margin vs Reactor Coolant Boron Concentration 500 1000 1500 RCS BORON CbNCENTRA TION (PPM) 14B-A8 Attachment to L-2016-081 Page 8of10 2000

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0 TURKEY POINT UNIT 4 CYCLE 29 COLR FIGUREA3 Attachment to L-2016-081 Page 9of10 Turkey Point Unit 4 Cycle 29 Rod Insertion Limits vs Thermal Power ARO = 229 Steps Withdrawn, Overlap = 101 Steps 64.0, 229) v

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-50 UNAC1 OPE TURKEY POINT UNIT 4 CYCLE 29 COLR FIGUREA4 Attachment to L-2016-081 Page 10of10 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 4 Cycle 29

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14B-A10