ML20059C325

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Rev 0 to Core Operating Limits Rept, for Cycle 3
ML20059C325
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 08/20/1990
From: Hairston W
GEORGIA POWER CO.
To:
Shared Package
ML20059C321 List:
References
NUDOCS 9008310188
Download: ML20059C325 (20)
v • d • e


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i V0GTLE ELECTRIC GENERATING PLANT (VEGP) tiNIT 1 CYCLE 3 P i

CORE OPERATING LIMITS REPORT REVISION O i

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1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 1 CYCLE 3 has been prepared -in accordance with the requirements of Technical Specification 6.8.1.6.

L- The Technical Specifications affected by this repert are listed b2 low:

3/4.1.1.1 SHUTDOWN MARGIN - MODES 1 and 2 SHUTDOWN MARGIN - MODES 3, 4 and 5 3/4.1.1.2 .  !

3/4.1.1.3 Moderator Temperature Coefficient 3/4.1.3.5 Shutdown Rod Insertion Limit 3/4.1.3.6 Control Rod Insertion Limits 3/4.2.1 Axial Flux Difference 3/4.2.2 Heat Flux Hot Channel Factor - FQ(2) 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - F$g REV. O PAGE 1 of 9 h /

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COLR for VEGP UNIT 1 CYCLE 3 2.0 OPERATING LIMITS  :

The cycle specific parameter limits for the specifications listed 'n Section 1.0 are presented in the fo119 wing subsections. These limits have been developed r using the NRC approved methodologies specified in Technical Specific: tion '

6.8.1.6 .

2.1 SHUTDOWN MARGIN - MODES 1 AND 2 (Specification 3/4.1.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.3% Ak/k.

i 2.2 SHUTDOWN MARGIN - MODES 3. 4 AND 5 (Specification 3/4.1.1.2) 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures I and 2.

2.3 Moderator Temperature Coefficient (Specification 3/4.1.1.3)  ;

2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOL/ARO/HZP - MTC shall be less positive than +0.7 x 10-4 ok/k/0F for power levels er to 70% RTP with a linear ramp to 0 ok/k/0F at 100% RTP.

The EOL/AR0/RTP MTC shall be less negative than -4.0 x 10 4 '

hk/k/0F. .

2.3.2 The MTC Surveillance limit is:

The 300 ppm /AR0/RTP MTC should be less negative than or equal to 3.1 x 10 4 ok/k/0F.

where: BOL stands for Beginning of Cycle Life ARO stands for All Rods Out  ;

HZP stands for Hot Zero THERMAL POWER EOL stands for Fnd of Cycle Life RTP stands for RATED THERMAL POWER ,

2.4 Shutdown Rod Insertion Limit (Specification 3/4 1.3.5) ,

2 1 All shutdown rods shall be withdraw to a position greater than or  ;

equal to 222 steps. ,

2.5 Control Rod Insertion Limits (Specification 3/4.1.3.6) 2.5.1 The control rod banks shall be limited in physical insertion as shown in Figure 3.

REV. O PAGE 2 of 9 1

COLR for VEGP UNIT 1 CYCLE 3 1

2.6 Axial Flux Difference (Specification 3/4.2.1) l

{CAOC methodology)

The AXIAL FLUX DIFFERENCE (AFD) target band is +5%, -5% for core I 2.6.1 average accumulated burnup 5 3000 MWD /MTV.

f.6.2 The AFD target band is +3%, 12% for core average accumulated burnup > 3000 MWD /MTV.

where: MWD /MTV stands for megawatt days / metric ton of initial uranium metal.

2.6.3 The AFD Acceptable Operation Limits are provided in Figure 4.

2.7 Heat Flux Hot Channel Factor - Fy(Z) (Specification 3/4.2.2)

(Fxy methodology)

RTP F0 2.7.1 Fg(Z) s

  • K(Z) for P > 0.5 P

RTP F0 FQ (Z) 5 m __ *K(Z) for P s 0.5

0.5 where

P - THERMAL POWER RATED THERMAL POWER .

RTP 2.7.2 Fg - 2.30 .

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2.7.3 K(2) is provided in Figure 5. r REV. O PAGE 3 of 9 l

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COLR for VEGP UNIT 1 CYCLE 3 L RTP 2.7.4 Fxy - Fxy * (1 + PFxy * (1 P))

RTP where: 1. F is less than or sgJal to 1.775 for all Core pI5nes containing Bank "D" control rods

2. For all unrodded core planes:

RTP F is less than or equal to 1.705 for core eievationsbelow3.7ft.

RTP F is less than or equal to 1.660 for core eI5vationsbetween3.7ft.and8.1ft.

RTP F is less than or equal to 1.765 for core eI5vationsabove8.1ft.

2.7.5 PFxy = 0.2 Nuclear Enthalov Rise Hot Channel Factor - F$g (Specification 3/4.2.3)

E.8 RTP F5HsFag * (1 + PFAH * (1-P))

where: P = THERMAL POWER 1 RATED THERMAL POWER RTP 2.8.1 FAH

- 1.55 2.8.2 PFAH

= 0.3

, REY O PAGE 4 of 9 1

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COLR FOR VEGP UNIT 1 CYCLE 3 I Q

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COLR FOR VEGP UNIT 1 CYtLE 3

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REV. 0 PAGE 6 of 9 l

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COLR FOR VEGP UN8T 1 CYCLE 3

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, O PAGE 7 of 9

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.- COLR FOR YEGP UNIT 1 CYCLE 3 l

140 120 UNACCEPTABLE l 100 i OPERATION l ( 11.90) (11.90) t

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ACCEPTABLE OPERATION ig /

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50 -40 30 20 10 0 10 20 30 en 50 FLUX DIFFERENCE, Al(percent)

FIGURE 4 AX1AL FLUX DIFFERENCE LIMITS AS A FUf4CTIOff 0F RATED THERMAL POWER REV. O PAGE 8 of 9 m__ . _ _ , . , _, _

i COLR FDP, VEGP UN17 1 CYCLE 3 1 1

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1.25-1.00 mummmmmmmmmmu-mummmmmmmmmme

$ 0.75 0.50 CORE HEIGHT K(2) i 0.000 1.000 6.000 1.000 10.835 0.939 0.25 12.000 0.652 0

4.0 6.0 8.0 10.0 12.0 2C 0

CORE HEIGHT (ft)

FIGURE 5 .

K(2) - NORMAll2ED FQ(2) AS A FUNCTION OF CORE HEIGHT REV. O PAGE 9 of 9 ,

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V0GTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 2 CYCLE 1 CORE OPERATING LIMITS hiPORT AiVISION 0 l

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COLR for VEGP UNIT 2 CYCLE 1 s

1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 2 CYCLE 1 has been prepared in accordance with the requirements of Technical Specification 6.8.1.6 The Technical Specifications affected by this report are listed below:

3/4.1.1.1 SHUTDOWN MARGIN - MODES 1 and 2 3/4.1.1.2 SHUTDOWN MARGIN - MODES 3, 4 and 5 3/4.1.1.3 Moderator Te.nerature Coefficient 3/4.1.3.5 Shutdown Rod insert.on Limit i 3/4.1.3.6 Control Rod Insertion Limits 3/4.2.1 Axial Flux Difference  ;

3/4.2.2 Heat Flux Hot Channel Factor - FQ(Z)

N 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - FAH l 4

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REV. O PAGE 1 of 9 I

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COLR for VEGP UNIT 2 CYCLE 1 2.0 OPERATING LIMITS The cycle specific parameter limits for the specifications listed in Section 1.0 are presented in the following subsections. These limits have been developed using the NRC-approved methodologies specified in Technical Specification 6.8.1.6.

2.1 SHUTDOWN MARGIN - MODES I AND 2 (Specification 3/4.1.1.1)

I 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.3% Ak/k.

2.2 SHUTDOWN MARGIN - MODES 3. 4 AND 5 (Specification 3/4.1.1.2) 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures 1 and 2.

2.3 Moderator Temperature Coefficient (Specification 3/4.1.1.3) 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOL/ARO/HZP - MTC shall be less positive than 0 Ak/k/0F.

The EOL/ARO/RTP MTC shall be less negative than -4.0 x 10 4 ok/k/0F.

2.3.2 The MTC Surveillance limit is:

The300 3.1 x 10*ppg /AR0/RTPMTCshouldbelessnegativethanorequalto Ak/k/0F, where: BOL stands for Beginning of Cycle Life ARO stands for All Rods Out HZP stands for Hot Zero THERMAL POWER EOL stands for End of Cycle Life RTP stands for RATED THERMAL POWER 2.4 Shutdown Rod Insertion Limit (Specification 3/4.1.3.5) 2.4.1 All shutdown rods shall be withdrawn to a position greater than or equal to 222 steoc.

2.5 Control Rod Insertion limits (Specification 3/4.1.3.6) 2.5.1 The control rod banks shall be limited in physical insertion as l shown in Figure 3.

REY. O PAGE 2 of 9

COLR for VEGP UNIT 2 CYCLE 1 2.6 Axial Flux Difference (Specification 3/4.2.1)

(CAOC methodology) 2.6.1 The AXIAL FLUX DIFFERENCE (AFD) target band is +5%, -5% for core average accumulated burnup 5 3000 MWD /MTV.

2.6.2 The AFD target band is +3%, -12% for core average accunulated burnup > 3000 MWD /MTV, where: MWD /MTV stands for megawatt days / metric ton of initial uranium metal.

2.6.3 The AFD Acceptable Operation Limits are provided in Figure 4.

2.7 Heat Flux Hot Channel Factor - F Q (Z) (Specification 3/A.2.2)

(Fxy methodology)

RTP Fg 2.7.1 FQ (Z) s

  • K(Z) for P > 0.5 P

RTP FQ (Z) s

  • K(Z) for P s 0.5

0.5 where

P - THERMAL POWER RATED THERMAL POWER RTP 2.7.2 Fg - 2.30 l '

2.7.3 K(Z) is provided in Figure 5.

REV. O PAGE 3 of 9

, COLR for VEGP UNIT 2 CYCLE 1 L RTP 2.7.4 Fxy - Fxy * (1 + PFxy * (1-P))

RTP where: 1. F is less than' or equal to *. 71 for all core pi5nescontainingBank"D"controlrods

2. For all unrodded core planes:

RTP F is less than or equal to 1.54 for core eievationsuptoandincluding5.5ft.

RTP F is less than or equal to 1,62 for core eievationsabove5.5ft.

2.7.5 PFxy = 0.2 2.8 Nuclear Enthalov Rise Hot Channel Factor - F$g (Specification 3/4.2.3)

. RTP F5HsFAH * (1 + PFAH * (1 P))

where: P = _ THERMAL P,0WER RATED THERMAL POWER RTP 2.8.1 FAH

= 1.55 2.8.2 Ii AH = 0.3 REV. O PAGE 4 of 9

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, .' . COLR FOR VEGP UN1V 2 CYCLE 1 140 -

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I FIGURE 4 Axl AL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER l

REV. O PAGE 8 of 9 e

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' ' ' i COLR FOR VEGP UNIT 2 CYCLE 1

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0 2.0 4.0 6.0 6.0 10.0 12.0 CORE HEIGHT (ft)

FIGURE 5 K(Z) - NORMALIZED ig(2) AS A FUNCTION OF CORE HEIGHT REV. O PAGE 9 of 9

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