L-2015-271, Core Operating Limits Report, Cycle 28

Core Operating Limits Report, Cycle 28

ML15329A376
Person / Time
Site:	Turkey Point
Issue date:	11/16/2015
From:	Summers T Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2015-271
Download: ML15329A376 (11)

Text

0FPLo NOVL-201 16"5-27 20151 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 Operatinqi 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 28.

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

Very truly yours, ThmsSummers Site Vice President Turkey Point Nuclear Plant Attachment cc: Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant

/'3 Florida Power & Light Company 9760 SW 344 St Homestead, FL 33035

Attachment to L-2015-271 Page 1 of 10 Turkey Point Unit 3 Cycle 28 Core Operating Limits Report (COLR) 14A-A1

Attachment to L-2015-271 Page 2 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR

1.0 INTRODUCTION

This Core Operating Limits Report for Turkey Point Unit 3 Cycle 28 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 I14A-A3 2.2 2.2.1 Reactor Trip System Instrumentation Setpoints, Table 2.2-1, Notes 1 & 3 14A-A3-1 4A-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 F0 (Z) 14A-A5 2.11 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor I14A-A6 2.12 3.2.5 DNB Parameters 14A-A6 Description Figure 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 28 Rod Insertion Limits vs Thermal Power 14A-A9 A4 Axial Flux Difference as a Function of Rated Thermal Power 14A-A10 14A-A2

Attachment to L-2015-271 Page 3 of 10 TURKEY POINT UNIT 3 CYCLE 28 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 Overtem~erature AT

- ;1 =OS,t12 =OS Lead/Lag compensator on measured AT Lag compensator on measured AT K- (= 1.31

-K 2= 0.023/°F

-t 4 =25s,t"5 =3s Time constants utilized in the lead-lag compensator for Tavg

-t 6 = 2s Lag compensator on measured Tavg

-T'*_<583.0 °F Indicated Loop Tavg at RATED THERMAL POWER

-K 3 =0.00116/psi

-P' _>2235 psig Nominal RCS operating pressure f1(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 q* 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

Attachment to L-201 5-271 Page 4 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR NOTE 2 on TS Table 2.2-10Overtemperature 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 >0.0/°F For increasing average temperature

- K5= 0.0 For decreasing average temperature

- t*7 >0s Time constants utilized in the lead-lag compensator for Tavg

- K6 = 0.0016/°F For T > T"

- K(6= 0.0 For T _<T"

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

- f2 (AI)= 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-AS) 2.4 Shutdown Margin Limit for MODE 5 (TS 3.1.1.2)

- > 1.77%Alkk 14A-A4

Attachment to L-2015-271 Page 5 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR 2.5 Moderator Temperature Coefficient (MTC) (TS 3.1.1.3)

< +5.0x 10- 5 Adk/°lF

- BOL, HZP, ARO, and from HZP to 70% Rated Thermal Power (RTP) 70% RTP to 100% RTP the MTC decreasing linearly from < + 5.0 x 10- 5 Ak/k/°F

-From to < 0.0 x 10-5 Ak/k/°F

-Less negative than - 41.0 x 10. 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 228 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 =228 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)

-[F 0 ]L = 2.30

-K(z) =1.0 For 0' < z < 12' where z is core height in ft 2.11 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.3)

FAHRTP = 1.600 PFAH = 0.3 14A-A5

Attachment to L-2015-271 Page 6 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR 2.12 DNB Parameters (TS 3.2.5) a cs mavg < 585.0 °F

-Pressurizer Pressure > 2204 psig 14A-A6

Attachment to L-2015-271 Page 7 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR 680*

0.I.

-0 0.

i-ul V

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1,4 Core Power (fraction of 2644 MWt)

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

Attachment to L-2015-271 Page 8 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR FIGURE A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration a

U  !!f t!iMODE z .ii. 4with no RCP in operatkon LLL (0.0, 1.77) I } *+ +I + * +; + * + + . . . .. . . . . . . . .I +++

1.5 2 r~

.-I,-

• I +

--+-(--+.

I

. . . "<I---- ---- - - - . .

I I

. .

! ** I *J*I:;

. . . -+ +--l- *- +". . .

+

o 1

z L

+_*Lj*.!iiI!!

• i* I I I* J !i~l~I iIli i i i i*

LI.i- l II't-* 1 iI i+ i  ! + '*

E HKK

_-______t* ___+

0 I il l ll i(I I.lilj" " , Iii El II *-

Ii I++-Ii IllIl' .I++: I : +I  !+

0.5 0

0 500 1000 1500 2000 RCS BORON CONCENTRATION (PPM) 14A-A8

Attachment to L-2015-271 Page 9 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR FIGURE A3 Turkey Point Unit 3 Cycle 28 Rod Insertion Limits vs Thermal Power ARO = 228 Steps Withdrawn, Overlap = 100 Steps

.tj3-- ,--I S I ,21tt4 19 - -- ---

- Ij 24---1l I -I- -

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

Attachment to L-201 5-271 Page 10 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR FIGURE A4 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 3 Cycle 28 120____

(-9,100) (+6,1 0) 100 UNAC( EPTABLE / UI ACCEPTE ;LE OPE RATION )PERATIOI

(-30,50) ACCEPT BLE OPERAT ON (+ 10,50)

• -40 20 0

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

14A-A10

0FPLo NOVL-201 16"5-27 20151 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 Operatinqi 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 28.

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

Very truly yours, ThmsSummers Site Vice President Turkey Point Nuclear Plant Attachment cc: Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant

/'3 Florida Power & Light Company 9760 SW 344 St Homestead, FL 33035

Attachment to L-2015-271 Page 1 of 10 Turkey Point Unit 3 Cycle 28 Core Operating Limits Report (COLR) 14A-A1

Attachment to L-2015-271 Page 2 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR

1.0 INTRODUCTION

This Core Operating Limits Report for Turkey Point Unit 3 Cycle 28 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 I14A-A3 2.2 2.2.1 Reactor Trip System Instrumentation Setpoints, Table 2.2-1, Notes 1 & 3 14A-A3-1 4A-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 F0 (Z) 14A-A5 2.11 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor I14A-A6 2.12 3.2.5 DNB Parameters 14A-A6 Description Figure 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 28 Rod Insertion Limits vs Thermal Power 14A-A9 A4 Axial Flux Difference as a Function of Rated Thermal Power 14A-A10 14A-A2

Attachment to L-2015-271 Page 3 of 10 TURKEY POINT UNIT 3 CYCLE 28 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 Overtem~erature AT

- ;1 =OS,t12 =OS Lead/Lag compensator on measured AT Lag compensator on measured AT K- (= 1.31

-K 2= 0.023/°F

-t 4 =25s,t"5 =3s Time constants utilized in the lead-lag compensator for Tavg

-t 6 = 2s Lag compensator on measured Tavg

-T'*_<583.0 °F Indicated Loop Tavg at RATED THERMAL POWER

-K 3 =0.00116/psi

-P' _>2235 psig Nominal RCS operating pressure f1(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 q* 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

Attachment to L-201 5-271 Page 4 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR NOTE 2 on TS Table 2.2-10Overtemperature 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 >0.0/°F For increasing average temperature

- K5= 0.0 For decreasing average temperature

- t*7 >0s Time constants utilized in the lead-lag compensator for Tavg

- K6 = 0.0016/°F For T > T"

- K(6= 0.0 For T _<T"

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

- f2 (AI)= 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-AS) 2.4 Shutdown Margin Limit for MODE 5 (TS 3.1.1.2)

- > 1.77%Alkk 14A-A4

Attachment to L-2015-271 Page 5 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR 2.5 Moderator Temperature Coefficient (MTC) (TS 3.1.1.3)

< +5.0x 10- 5 Adk/°lF

- BOL, HZP, ARO, and from HZP to 70% Rated Thermal Power (RTP) 70% RTP to 100% RTP the MTC decreasing linearly from < + 5.0 x 10- 5 Ak/k/°F

-From to < 0.0 x 10-5 Ak/k/°F

-Less negative than - 41.0 x 10. 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 228 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 =228 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)

-[F 0 ]L = 2.30

-K(z) =1.0 For 0' < z < 12' where z is core height in ft 2.11 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.3)

FAHRTP = 1.600 PFAH = 0.3 14A-A5

Attachment to L-2015-271 Page 6 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR 2.12 DNB Parameters (TS 3.2.5) a cs mavg < 585.0 °F

-Pressurizer Pressure > 2204 psig 14A-A6

Attachment to L-2015-271 Page 7 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR 680*

0.I.

-0 0.

i-ul V

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1,4 Core Power (fraction of 2644 MWt)

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

Attachment to L-2015-271 Page 8 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR FIGURE A2 Required Shutdown Margin vs Reactor Coolant Boron Concentration a

U  !!f t!iMODE z .ii. 4with no RCP in operatkon LLL (0.0, 1.77) I } *+ +I + * +; + * + + . . . .. . . . . . . . .I +++

1.5 2 r~

.-I,-

• I +

--+-(--+.

I

. . . "<I---- ---- - - - . .

I I

. .

! ** I *J*I:;

. . . -+ +--l- *- +". . .

+

o 1

z L

+_*Lj*.!iiI!!

• i* I I I* J !i~l~I iIli i i i i*

LI.i- l II't-* 1 iI i+ i  ! + '*

E HKK

_-______t* ___+

0 I il l ll i(I I.lilj" " , Iii El II *-

Ii I++-Ii IllIl' .I++: I : +I  !+

0.5 0

0 500 1000 1500 2000 RCS BORON CONCENTRATION (PPM) 14A-A8

Attachment to L-2015-271 Page 9 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR FIGURE A3 Turkey Point Unit 3 Cycle 28 Rod Insertion Limits vs Thermal Power ARO = 228 Steps Withdrawn, Overlap = 100 Steps

.tj3-- ,--I S I ,21tt4 19 - -- ---

- Ij 24---1l I -I- -

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

Attachment to L-201 5-271 Page 10 of 10 TURKEY POINT UNIT 3 CYCLE 28 COLR FIGURE A4 Axial Flux Difference as a Function of Rated Thermal Power Turkey Point Unit 3 Cycle 28 120____

(-9,100) (+6,1 0) 100 UNAC( EPTABLE / UI ACCEPTE ;LE OPE RATION )PERATIOI

(-30,50) ACCEPT BLE OPERAT ON (+ 10,50)

• -40 20 0

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

14A-A10