ML20044E328

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Rev 1 to Vogtle Electric Generating Plant Unit 2 Cycle 3 Core Operating Limits Rept
ML20044E328
Person / Time
Site: Vogtle Southern Nuclear icon.png
Issue date: 05/31/1993
From:
GEORGIA POWER CO.
To:
Shared Package
ML20044E327 List:
References
NUDOCS 9305240194
Download: ML20044E328 (14)
v • d • e


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i V0GTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 2 CYCLE 3 CORE OPERATING LIMITS REPORT REVISION 1 MAY 1993 i

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9305240194 930518 PDR ADOCK 05000425 P

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i Vogtle Electric Generating Plant Unit I and Unit 2 Core Operating Limits Report i

Unit 2 Cycle 3 j

Revision 1 May 1993 i

l Revision Insertion Instructions l

Item Instructions Active COLR List Replace Unit 2 Report Pages 1-12 Replace with Pages 1-11 and and Title Page Title Page I

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i Vogtle Electric Generating Plant Unit I and Unit 2 Active Core Operating Limits Report List i

May 1993 r

t Unit I Cycle 5 March 1993 Unit 2 Cycle 3, Revision 1 May 1993 f

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COLR for VEGP UNIT 2 CYCLE 3

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t 1.0 CORE OPERATING LIMITS REPORT l

This Core Operating Limits Report (COLR) for.VEGP UNIT 2 CYCLE 3 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 I and 2

[

3/4.1.1.2 SHUTDOWN MARGIN - MODES 3, 4 and 5 l

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 - F (Z) i a

N 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - F 1

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t REV 1 PAGE 1 of 11

(

COLR for VEGP UNIT 2 CYCLE 3 2.0 OPERATING LIMITS j

The cycle-specific parameter limits for the specifications listed in Section 1.0 l

are presented in the following subsections.

These limits have been developed l

using the NRC-approved methodologies specified in Technical Specification 6.8.1.6.

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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% ok/k.

l 2.2 SHUT 00WN MARGIN - MODES 3. 4 AND 5 (Specification 3/4.1.1.2) l 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures 1 and 2.

2.3 Moderator Temoerature Coefficient (Specification 3/4.1.1.3)

-j 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOL/AR0/HZP - MTC shall be less positive than +0.7 x 10-'

Ak/k/*F for power levels up to 70% RTP with a linear ramp to 0 ak/k/*F at 100% RTP.

The E0L/AR0/RTP-MTC shall be less negative than -5.5 x 10

Ak/k/*F.

  • 2.3.2 The MTC Surveillance limit is:

P The 300 ppm /AR0/RTP-MTC should be less negative than or equal to

-4.75 x 10~' ak/k/*F.*

where: BOL stands for Beginning of Cycle Life AR0 stands for All Rods Out HZP stands for Hot Zero THERMAL POWER E0L stands for End of Cycle Life i

RTP stands for RATED THERMAL POWER 2.4 Shutdown Rod Insertion Limit (Specification 3/4.1.3.5) 2.4.1 The shutdown rods shall be withdrawn to a position greater than or equal to 225 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.

t Based on full-power T-average in the range of 583.4 F to 586.4 F, inclusive.

REV 1 PAGE 2 of 11 I

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

{RA0C methodology}

2.6.1 The Axial Flux Difference (AFD) Acceptable Operation Limits are provided in Figure 4.

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

(F, methodology}

RTP p

2.7.1 F,(Z) s

  • K(Z) for P > 0.5 P

f RTP p

r O

F,(Z) s

  • L(Z) for P s 0.5 0.5 THERMAL POWER where:

P RATED THERMAL POWER l

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2.7.2 F,RTP = 2.50 l

i 2.7.3 K(Z) is provided in Figure 5.

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C 2.7.4 F (Z) s for P > 0.5 P

  • W(Z)

FRTP

  • K(Z) i FC(Z) s.

for P s 0.5 0.5

  • W(Z)

. 7.5 W(Z) values are provided in Figures 6 and 7.

I REV 1 PAGE 3 of 11 1

COLR for VEGP UNIT 2 CYCLE 3 i

2.8 Nuclear Enthalov Rise Hot Channel Factor - FR (Specification 3/4.2.3) l i

2.8.1 F% s F R,TP* (3 + pp,,, * (1_p))

THERMAL POWER l

where:

P RATED THERMAL POWER b

2.8.2a F.RTP 1.53 for LOPAR fuel, and i

2.8.2b F,RTP 1.60 for VANTAGE 5 fuel

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0.3 for LOPAR and VANTAGE 5 fuel i

2.8.3 P F,,

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REV 1 PAGE 4 of 11 m

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l COLR FOR VEGP UNIT 2 CYCLE 3 i

5.00 il 4.00 ACCEPTABLE

^

I OPERATING REGION 5

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.00 (2500,2.90 z

h REQUIRED SHUTDOWN

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l 2

MARGIN l

i z

@ 2.00 O

5 UNACCEPTABLE O

OPERATING (1000,1.30)

REGION 1.00 i

l 0.00 0

500 1000-1500 2000 2500 mi RCS BORON CONCENTRATION (ppm)

)

FIGURE 1 f

REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (MODE 4 WITH AT LEAST i

ONE REACTOR COOLANT PUMP RUNNING) j i

)

REV1 PAGE 5 of 11

COLR FOR VEGP UNIT 2 CYCLE 3 5.00 (2500,4.80) 4.00 ACCEPTABLE I

OPERATING REQUIRED g

REGION SHUTDOWN k

5 MARGIN e

.E. 3.00 Z

S sz

@ 2.00 s

S UNACCEPTABLE W

OPERATING REGION (500,1.00) 0.00 0

500 1000 1500 2000 2500 21?5-1 RCS BORON CONCENTRATION (ppm)

FIGURE 2 REQUIRED SHUTDOWN MARGIN FOR MODES 4 AND 5 (MODE 4 WITH NO REACTOR COOLANT PUMPS RUNNING)

REV1 PAGE 6 of 11 '

COLR FOR VEGP UNIT 2 CYCLE 3 i

(Fully Withdrawn *)

l/ (28.0%,225) l

/ (78.0%,225)-

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[ BANK B

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180 I

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160 (100%,161) 3

[ BANK C l

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[ BANK D 60 /

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l (30.2%, 0)[

0 20 40 60 80 100 (Fully inserted) l POWER (percent of rated thermal power)

  • Fully withdrawn shall be the cond: lion where control rods are at a position within the interval 2225 and 1231 steps withdrawn.

FIGURE 3 ROD BANK INSERTION LIMITS VERSUS THERMAL POWER l

l REV1 PAGE 7 of 11 l

COLR FOR VEGP UNIT 2 CYCLE 3 b

140 120 I

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(-20,100)

(+10,100) j 100 1

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UNACCEPTABLE l

l UNACCEPTABLE o

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ACCEPTABLE E

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(-35, 50)

(+26, 50) l l

40 l

20 f-0

-50

-40

-30

-20

-10 0

10 20 30 40 50 AXIAL FLUX DIFFERENCE (percent Al)

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I FIGURE 4 j

AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER

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FOR RAOC REV 1 PAGE 8 of 11

COLR FOR VEGP UNIT 2 CYCLE 3 9

t' 1.40 1.20 0

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1.00 e

z x<y 0.80 o

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F = 2.50 c

o 0z CORE 1 0.40 HEIGHT K(Z) 0.000 1.000 6.000 1.000 12.000 0.925 0.20 i

0 i

0 2.0 4.0 6.0 8.0 10.0 12.0 CORE HEIGHT (ft) t FIGURE 5 l

K(Z)- NORMALIZED FO (Z) AS A FUNCTION OF CORE HEIGHT t

I REV 1 -

PAGE 9 of 11

COLR FOR VEGP UNIT 2 CYCLE 3 i

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REV1 2i75-i.

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' 0000 FIGURE 7

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' 0000 RAOC W(Z) AT 16000 MWD /MTU

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  • Top sna Bottom 15% Esclucec pe" This figure is referred to by Technical Specifications 42.22d, B3/42.2 7eenntes# spec 1r1eation 4.2.2.2 EV 1

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PAGE 11 of 11

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