Latest revision as of 02:58, 14 December 2024

Text

Cycle 4 Core Operating Limits Rept
	ML20085N059
Person / Time
Site:	Vogtle
Issue date:	09/30/1991
From:	; GEORGIA POWER CO.
To:	;
Shared Package
ML20085N057	List: ELV-03206, Forwards Vogtle Unit 1,Cycle 4 Core Operating Limits Rept. Revised Rept Became Effective Upon Entry Into Mode 5 Following Completion of Fuel Loading; ML20085N059;
References
	NUDOCS 9111140032
	Download: ML20085N059 (12)
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O V0GTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 1 CYCLE 4 CORE OPERATING LIMITS REPORT SEPTEMBER 1991 O

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PDR ADOCK 05000424 P

PDR

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73 COLR for VEGP UNIT 1 CYCLE 4

]

1.0 CORE OPERATING LIMITS REPORI 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 SHUTDOWN 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 f actor - F,(Z) 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - Fd I

,3

,Y PAGE 1 of 12

5 COLR for VEGP UNIT 1 CYCLE 4 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 1 AND 2 (Specification 3/4.1.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.3 percent 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 Temoerature Coefficient (Specification 3/4.1.1.3) 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOL/AR0/HZP - MTC shall be less positive than +0.7 x 10 Ak7k/"F for power levels up to 70 percent RTP with a linear ramo to

{

0 Ak/k/*F at 100 percent RTP.

i The E0L/AR0/RTP-MTC shall be less negative than j

-4.8 x 10 Ak/k/'F.

l 2.3.2 The MTC Surveillance limit is:

i-

-equalto-4.05x10'flTCshouldbelessnegativethanor The 300 ppm /AR0/RTP-F Ak/k/ F.

where:

BOL stands for Beginning of Cycle Life AR0 stands for All Rods Out t

HZP stands for Hot Zero THERMAL POWER l

E0L stands for End of Cycle Life g

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 Limjts (Specification 3/4.1.3.6) 2.5.1 The control rod banks shall be limited in physical insertion as-shown in figure 3.

I PAGE 2 of 12 i

l-COLR for VEGP UNIT 1 CYCLE 4 2.6 Axial Flux Difference (Specification 3/4.2.1)

(relaxed axial offset control (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 fo 2.7.1 F,(Z) s

K(Z) for P > 0.5 P

RTP F (Z) s

K(Z) for P s 0.5 o

0.5 where

P THERMAL POWER

=

RATED THERMAL POWER RTP 2.7.2 F

2.50 o

2.7.3 K(Z) is provided in figure 5.

C RTP 2.7.4 Fo (Z) s Ec

KfZ) for P > 0.5 P

W(Z)

C RTP Fo (Z) s Ec

K(Z1 for P s 0.5 0.5

W(Z)

O 2.7.5 W(Z) values are provided in figures 6 through 8.

PAGE 3 of 12

~

r COLR for VEGP UNIT 1 CYCLE.4 sO

-2.8 Nuclear Enthalov Rise Hot Channel Factor - Fh (Specification 3/4.2.3)

RTP 2.8.1

. Ff, s F, * (1 + PF, * (1-P))

3 3

where:

P THERMAL POWER RATED-THERMAL POWER RTP-2.8.2a F,

1.57 for LOPAR fuel and 3

RTP-

-2.8.2b F,

1.M for WME 5 fuel

=

3

-2.8.3 PF,

0.3 for LOPAR and VANTAGE 5 fuel

=

3 l

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L h

l O i,s,s...o.sco u.ui PAGE 4 of 12 i

=

COLR FOR VEGP UNIT 1 CYCLE 4

()

V-5.00 4.00 ACCEPTABLE

^

b OPERATING REGION C

(2500,2.90

=0 REQUIRED SHUTDOWN h,

MARGIN g

O O _

3 2.00 8

a UNACCEPTABLE I*

OPERATING

~ (1000.1.30)

REGION 1.00 0.00 0

500 1000 1500 2000 2500 zow RCS BORON CONCENTRATION (ppm)

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

PAGE 5 of 12

r-COLR FOR VEGP UNIT 1 CYCLE 4 5.00 (2500,4.80) 4.00 ACCEPTABLE I

OPERATING REQUIRED g

REGION SHUTDOWN k

MARGIN

$ 3.00 g

z

{!

s z

2.00

.r I

UNACCEPTABLE OPERATING REGION

~

(500,1.00) 0.00 0

500

-1000 1500 2000 2500 71/5 I RCS BORON CONCENTRATION (ppm)

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

OV PAGE 6 of 12

r' COLR FOR VEGP UNIT 1 CYCLE 4 (Fully Withdrawn *)

20 (28.0 %,225)

(78.0%, 225)-

200 BANK B 180 160 I

I (100 %,161) 8 5

'E 140 g

) BANK C 120

[

05'

/

~

O 8

/

s

/

80

]_

[

BANK D 8

/

60 f(0%,46)

'{

20

/

(30.2%,0)[

0 20 40 60 80 100 POWER (percent of 3411 MWt)

Fully withdrawn shall be the condition where control rods are at a position within the interval 2225 and (231 steps withdrawn.

FIGURE 3 ROD BANK INSERTION LIMITS VERSUS THERMAL POWER PAGE 7 of 12

COLR FOR VEGP UNIT 1 CYCLE 4 O

120 100 UNACCEPTABLE UNACCEPTABLE

=

E8 80 5

h ACCEPTABLE 60 0

!y

(-35, 50)

(+30, 50) o 40 tzC 20 P50

-40

-30

-20

-10 0

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

FIGURE 4 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER FOR RAOC PAGE 8 of 12

1 COLR FOR VEGP UNIT 1 CYCLE 4 1.20 1.00 8

b I 0.80 9

52

$ 0.60 0.40 2

Fa = 2.50 R

CORE E-HEIGHT K(Z) 0.20 0.000 1.000 6.000 1.000 12.000 0.925 0

0 2.0 4.0 6.0 -

- 8.0 10.0 12.0 2*

CORE HEIGHT (ft)

FIGURE 5 K(Z) - NORMAllZED Fo(Z) AS A FUNCTION OF CORE HEIGHT (D

v PAGE 9 of 12

COLR FOR VEGP UNIT 1 CYCLE 4 g3 V

Antal (levaton BOL feet)

W,Zi Point 1

i2 00 i.0o00 1.6 2

11 80 1 0000 3

11 60 1.0000 l-j

i 4

11 40 1.0000 n

l4 5

11.20 1 0000

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6 11 00 1 0o00

=

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Ill; alii lll1 l

i 11 I-7 to 80 1 0000 6

'til lil4 !{l liii i:

l t-

)

1 1'

i-8 10 60 1 0000 9

10 40 5 0o00 1.5

' i-1 10 10 20 1 0000 i

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11 10.00 1 2289 I i-l^

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lia; i

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12 9 80 t.2003

= - - -

13 9 60 1 1761 14 9 40 1 1576 1i i;ll

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1 2

3 4

5 6

7 8

9 10 11 12 50 2.20 1.5282 1.0 51 2.00 1.5587 52 1.80 1.0oo0 CORE HEIGHT (feet) 53 1.60 1.000o 54 1.40 1.0oo0 55 1.20 1.oooO FIGURE 6 e

56 1.0o 1.0oo0 a

57 0 80 1.00o0 RAOC W(Z) AT 150 MWD /MTU 58 0.60 t.oooO e

59 0.40 1.0oo0 60 0.20 1.0000 61 0.00 1.0000 A

Top and Bottom 15% Excluded per e

This figure is referred to by Techmcal Specificanons 4 2.2.2d. 83/4 2.2 Tocnnt ca1 Spect f ication 4.2.2.2 PAGE 10 Of 12 21751

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e pJ-COLR FOR VEGP UNIT 1 CYCLE 4 Antal Elevaton MOL Point ifeet)

Wa 2 l 1.5 e

i a no

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2 11.go 1.0000 l'il I'

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11.00 1 0000 I

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11 10.00 1 2766 12 9.80 1 2564 i

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1.2 l

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34 5.40 1-1598 i l, j

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35 5.20 1.1702

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l l

l 37-4.80 1.1859 38 4.00 1.1922

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11 l

l

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40 4.20 1.1997 l1Il l ll1 l

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41 4.00 1.2031 l

c I

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ll

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11

!!L 44 3.40 1.2166 ll l

l l

l l l!

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45 3.20 1.2185 46 3.00 1 2214 l ll l -

l 47 2.80 1.2274 48 2,60 1.2371-lk lll l

ll l

l l

lll o

2.40 1;2475 1.0 0 1

2 3

-4 5

6 7

8 9

10 11 12 50 2.20 1,2574 51 2.00 1.2671; 52 1 80 1 0000

. CORE HEIGHT (feet)

=

53 1.60 1.0000

,54 1.40

.1.0000

=

e 50 1.20 1.0000 FIGURE 7 56 1.00 i.0000 e

57 0.80 1.0000 58 o.60 1.0000 RAOC W(Z) AT 7000 MWO/MTU a

59 0.40 1,0000 e

60 0.20 1,0000 61 0.00 1.0000 Top and Bottom 15% Excluded per' This f6gure is referred to by Technical Specifica0ons 4.2.2.2d B3/4.2.2 Tecnn1eal Spec 1 f ieatt on 4.2.2.2 PAGE 11 Of 12 aou

COLR FOR VEGP UNIT 1 CYCLE 4 q

V Autal Elevation EOL 1.$

point

.vesti wi z i 1

12 00 1 0000 2

11.80 1 0000

, i:i -l:I 4,t 3 i,

i jj ii 3

11.60 1 0000 4

11.40 1.0000

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ll

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11.20 1 0000 i

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11 10.00 1 2221 i

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l-ll'

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ll ll l

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ll l-ll l j llll l j'j ll lll-lll llll 40 4.20 1 2429 ll 41 4.00 1 2412 lll! lll lll i ll IIl lll }l l

.! l.

lil?

lll lll 42 3.80 1 2375 43 3.60 1 2316 j'

ll lll l l ll lli lll l

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l l

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ll l

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lll lll ll l!ll lll' lll lll 48 2.60 1.2342 49 2.40 1 2467 0

1 2

3 4

5 6

7 8

9 10 11 50 2.20 1.2580 51 2.00 1.2697 CORE HEIGHT (feet) 52 1.80 1 0000 53 1,80 1.0000 54 1.40 1.0000 FIGURE 8 0

};g l$

57 0.80 1.0000

=

$8 0.60 1.oco0 RAOC W(Z) AT 15000 MWD /MTU 59 0.40 1.0000 60 0.20 1.0000 61 0.00 1.0000

(]

This figuru in referred to by Technical Specifications 4 2.2.2d. B3/4 2 2 n

a oct at

. 2 rusi PAGE 12 of 12

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