ML20086R314

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Rev 1 to Vogtle Electric Generating Plant Unit 1 Cycle 4 Core Operating Limits Rept, for Dec 1991
ML20086R314
Person / Time
Site: Vogtle Southern Nuclear icon.png
Issue date: 12/31/1991
From:
GEORGIA POWER CO.
To:
Shared Package
ML20086R308 List:
References
NUDOCS 9112310229
Download: ML20086R314 (13)
v • d • e


Text

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V0GTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 1 CYCLE 4 1

CORE OPERATING LIMITS REPORT T

f REVISION 1 l

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DECEMBER 199]

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9112310229 911223 PDR ADOCK 05000424

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COLR for VEGP UNIT 1 CYCLE 4 O

1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for VEGP UNIT 1 CYCLE 4 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 SHUTOOWN MARGIN - MODES 1 and 2 3/4.1.1.2 SHUTDOWN MARGIN - MODES 3, 4 and 5 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) a 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - Fh REV. 1 PAGE 1 of 12

1 COLR for VEGP UNIT 1 CYCLE 4 6

2.0 OPERATING LINITS 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 Specificati:.a 6.8.l.6 SHUTDOWN MARGIN - MODES ! AND 2 (Specification 3/4.1.1.1)

(

2.1 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal tc 1.3 percent Ak/k.

2.2 SHUTDOWN MARGIN - M0013 3. 4 AND 5 (Specification 1/4.1.1.2) 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in figures 1 and 2.

5 2.3 Moderator Temperature Coeffir_igal (Specification 3/4.1.1.3) 2.3.1 The Moderator Temperature Coefficient (MTC) limita are:

The BOL/AR0/HZP - MTC shall be less positive than +0.7 x 10 Ak/k/*f for power levels up to 70 percent RTP with a linear ramp to O Ak/k/ F at 100 percent RTP.

)

(O The E0L/AR0 i

-4.7 x 10 /RTP-MTC shall be less negative than v

Ak/ k/*F.

  • p 2.3.2 The MTC Surveillance limit is:

The 300 ppm /AR0/RTP-MTC should be less negative than or equal to -3.95 x 10 Ak/k/ F.*

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 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.

  • Based on full-power T-average of 586.4*f.

O

'J REV. 1 PAGE 2 of 12

...~

i COLR for VEGP UNIT 1 CYCLE 4 i

2.6 Ax;41 Flux Difference (Specification 3/4.2.1) l

{ relaxed axial offset control (RAOC) methodology) 2.6.1 lhe Axial Flux Difference (AFD) acceptable operation limits are provided in figure 4.

l 2.7 lig.a.t_ Fludp.1 Channel Factor - F,(2) (Specification 3/4.2.2)

(f methodology) o RTP F

2.7.1 F(Z)s a

  • K(Z) for P > 0.5 o

P RTP F (2) s

  • K(Z) for P s 0.5 o

i l

0.5 i O where: P THERMAL, POWER __

=

RATED THERMAL POWER l

RTP l

2.7.2 F

2,50 o

l 2.7. 3 - X(Z) is provided in figure 5.

C RTP 2.7.4 Fu (Z) s E

  • lil7J for P > 0.5 P
  • W(Z)

.C RT4 Fo (Z) s fo__11Ll). for P $ 0.5 0.5 " W(Z) 2.7.5 W(Z) values are provided in figures 6 through 8.

O REV. 1 PAGE 3 of 12

P COLR for VEGP UNIT'l CYCLE 4 O

2.8

@gl, par Enthaley Rise Hot (hp.nng_), Aqlgt - ff, (Specification 3/4.2.3) i a

RTP 2.8.1 F[, s Fan * (1 + PF, * (1-P))

3 r

where:

P THERMAL POWER RATED THERMAL POWER RTP 2.8.2a F 1.57 for LOPAR fuel and 3n t

RTP 2.8.2b F,

1.65 for VANTAGE 5 fuel

=

3 2.8.3 Pf,

0.3 for LORAR and VANTAGE 5 fuel a

w/

F l

n \\.og.osti gcote. 91 i.

g)

REV 1 PAGE 4 of 12 l

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COLR FOR VEGP UNIT 1 CYCLE 4 I

5.00' 4.00 2

ACCEPTABLE 2

OPERATING REGION C

8 I 3.00

=,500. 2.9T~

gJ 7=

REQUIRED SHUTDOWN 2

MARGIN z

@ 2.00

~~m- - =

LO2I UNACCEPTABLE M

OPERATING (1000,1.30)

REGION 1.00 T-~~

1 0

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

F1GURE 1 REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (MODE 4 WITH AT LEAST ONE REACTOR COOLANT PUMP RUNNING)

O REV. 1 PAGE 5 of-12

,,e-.

w-4 m

3 w-w s

e-w e

a,

.=-

c.

m

.s--*

e

l COLR FOR VEGP UNIT 1 CYCLE 4 o~

l 5.00 (2500,4.80) 4.00 g

ACCEPTABLE 3

OPERATING REQUIRED g

REGION SHUTDOWN g

MARGIN e

$ 3.00 8

tr

'hz-3 2.00

)

2 UNACCEPTABLE fo OPERATING REGION 1.00

~

(500,1.00) l 0.00 O

500

'1000 1500 2000 2500 e n.,

RCS BORON CONCENTRATION (ppm) i l

l\\.

l FIGURE s l

REQUIRED SHUTDOWN MARGIN FOR MODES 4 AND 5 (MODE 4 WITH l

NO REACTOR COOLANT PUMPS RUNNING)

REV. 1 PAGE 6 of 12 L

~

... ~.. -. -

.. =. _ - - -. -..

C0Ji FOR VEGP UNIT 1 CYCLE 4

' O (Fully Withorawn *)

225 220 (28.0 5,225)-

(78.0 % 225) -

^

I I

200 BANK.B 180 160 U

(100 % 161) ag n

j 140 BANK C Er 120 Og m

100 k

O y

z 80 BANK D g

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l 60

-~

C (0% f 6) 40 20 3

( 0.2% 0) l 0

0 20 40 60 80 100 (Fully insertod)

POWER (percent of 3411 MWt)

  • Fuliy withdrawn sha!! be the condmM where control rods Me at a position within the interyal322$ and 0231 Steps withdrawn l

FIGURE 3 ROD BANK INSERT!ON LIMITS VERSUS THERMAL POWER O

REV. j PAGE 7 of 12

4 COLR FOR VEGP UNIT 1 CYCLE 4 O

L 120

( 0,100) 410.100) 100 UNACCEPTABLE UNACCEPTABLE I

=

s 80 g.

6 ACCEPTABLE A

60 a5 O

b a

~

( 35,50)

(430. !>0)

Eo 40 Y

20 50 40 30 20 10 0

10 20 30 40 50 AXIAL FLUX DIFFERENCE (percent AI) l l

FIGURE 4 l

AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER FOR RAOC O

l REV. 3 PAGE 8 of 12 l

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_ ~. _. _ _.. _.. _._ _

l COLR FCR VEGP UNIT 1 CYCLE 4 O

1.20 l

1.00

=-

8 t;

I 0.80 o

b s

$ 0.60 4

O-

$ 0.40 2

F 2.50 o

R CORE yi HEIGHT K(2) 0.20 0.000 1.000 6.000 1.000 12.000 0.025 0

0 2.0 4.0 6.0 8.0 10.0 12.0 CORE HEIGHT (ft)

FIGURE 5 K(2). NORMAll2ED F (Z) AS A FUNCTION OF CORE HEIGHT o

O REV. 1 PAGE-9 of 12

COLR FOR VEGP UNIT 1 CYCLE 4

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O 1 2 3 4 5 6 7 8 9 10 11 12 50 2:20 1 et 2.00 5.sse? CORE HEIGHT (feet) s2 1.s0 t 0000 53 1,60 5.0000 l 54 1.40 - 1 0000-l FIGURE 6 ' e' '. 00 80 'N S t 1.0000 57 0.40 4 0 e0 - t.0000 - RAOC W(Z) AT 150 MWD /MTU t.0000 SS 0.40 1.0000-90 0.20 1.0000 e 81 0.00 1.0000

  • Top and lettom 19% Excluoed per This figure is reforfed io by Technical Specifications 4 2 2 2d, B3'd 2 2 Technic 81 $Pecif1Cetien 4.2.2.2 i

REV, 1 PAGE 10 Of I? '#.ww-,. ..,m.iw--, ,.-m-., .m,,,-,, -, - + r .+.---%--.e,1r,--- -.w-eve-m-m.e w e- --,---+-.Wiv-+-r-e-mvo~er+"ev' r www.re ww y v 1s"'v--w---*--*ww+'-*h*

COLR FOR VEOP UNIT 1 CYCLE 4 l O Antal ()gvaten seQL point o..ti wir> i

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e a COLR FOR VEGP UNIT 1 CYCLE 4 O i i Astat tievation (DL '"*1' "'2' 1.5 e i 12 00 1 0000 i 2 11,80 1.0000 3 11 50 t o000 j i -l 'j t. e 4 it 40 1.0000 S 11.20 t oo00

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  • +---

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