ML20012E015

Cycle 1 Core Operating Limits Rept.

ML20012E015
Person / Time
Site:	Vogtle
Issue date:	03/22/1990
From:	GEORGIA POWER CO.
To:
Shared Package
ML20012E012	List: ML20012E011 ML20012E013 ML20012E014 ML20012E015
References
NUDOCS 9003290217
Download: ML20012E015 (10)

Text

o ci i ENCLOSURE 4 FOR UNIT 2 L

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V0GTLE ELECTRIC GENERATING PLANT (VEGP) UNIT 2 CYCLE 1 CORE OPERATING LIMITS REPORT l

l 9003290217 900322 PDR ADOCK 05000424

. P - PDC l- l 1 l

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d

'b i

i COLk for VEGP UNIT 2 CYCLE 1 .

i I

1.0 CORE OPERATING LIMITS REPORT  :

i This Core Operating Limits Report (COLR) for VEGP UNIT 2 CYCLE 1 has been I prepared in accordance with the requirements of Technical Specification 6.8.1.6 l 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 j 3/4.1.1.3 Moderator Temperature Coefficient 3/4.1.3.5 Shutdown Rod Insertion Limit 1 3/4.1.3.6 Control Rod Insertion Limits l 3/4.2.1 Axial Flux Difference 1 3/4.2.2 Heat Flux Hot Channel Factor - FQ (Z) i I N

3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor - FAH t

i i

b

(

1 i

L

-m -n 's e - w

l'f _: + ; 1 7 s w m  ;

y' 4

]

l COLR for VEGP UNIT 2 CYCLE 1 2.0 OPERATING 141111 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 ,

L2.1 SHUTDOWN MARGIN - MODES 1 A@_2_(Specification 3/4.1.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.3% A k/k.

2.2- SHUTDOWN MARGIN - MODES 3. 4 AND 5 (Specification 3/4.1.1.2)

. 2.2.1 The SHt)TDOWN 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 oak /kOF.

iiie' E0L/AR0/RTP-MTC shall be less negative than -4.0 x 10-4 6 k/k/0F, L

l e 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 A k/k/0F.

L where: BOL stands for Beginning of Cycle Life L ARO stands for All Rods Out L HZP stands for Hot Zero THERMAL POWER E0L stands for End of Cycle Life RTP stands for RATE 0' THERMAL POWER L

l:

t ..

l

+-----.__m_____s

.n i yt j i

COLR for VEGP UNIT 2-CYCLE 1 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 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. t 2.6 Axial Flux Difference (Specification 3/4.2.1) i (CAOC methodology) 2.6.1 The AXIAL FLUX DIFFERENCE (AFD) target band is +5%, -5% for core '

average accumulated burnup <3000' MWD /MTV.

2.6.2 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. j l ,

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

(Fxy methodology)

RTP-l- FQ 2.7.1 FQ (Z) s

• K(Z) for P > 0.5 P

RTP

!> FQ (Z) s

• K(Z) for P s 0.5 l 0.5 L where: P = THERMAL POWER -

RATED THERMAL POWER RTP 2.7.2 FQ

= 2.30 l'

b; 9 4: .,

i k

COLR for VEGP UNIT 2 CYCLE 1 2.7~3

. K(Z) is provided in Figure 5.

L' RTP Fxy - Fxy * (1 + PFxy * (1-P))

RTP-

,- 2.7.4 where: 1. Fxy is less than or equal to 1.71 for all core planes containing Bank ."D" control rods l- 2'. For all unrodded core planes:

L RTP Fxy is-less than or equal to 1.54 for core elevations up to and including 5.5 ft.

l L RTP l Fyy is less than or equal to 1.62 for core p elevations above 5.5 ft.

1 9

2.7.5 PFxy - 0.2 {

1

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

l- RTP i l 2.8.1 FjHsF6H * (1 + PFA H * (1-P))  !

where: P - THERMAL POWER RATED THERMAL POWER RTP  ;

2.8.2 F3H

= 1.55  :

l 2.8.3 PFAH

= 0.3 i

l

.* L p

l-i . UNIT 2

l. 5.00 i

I l

4.00 l ACCEPTABLE OPERATING y REGION 32 n i d (2500,3.0) 8.

$ 3.00 -

'n l

~ f ,,

h REQUIRED O

tr SHUTDOWN <

l j MARGIN .h z e 3 2.00 5 ACCEPTABl..E -

5 OPERATING REGION q

,1.3) #

1.00 0.00 0 400' 800 1200 1600 2000 2400 RCS BORON CONCENTRATION (ppm) i FIGURE 1 UNIT 2 REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (MODE 4 WITH AT LEAST ONE REACTOR COOLANT PUMP RUNNING)

__ ._ - . ._ ._ ._ .= , _.. -. . . . - . . _ .._ _. . _ _ _ __ _~

.y UNIT 2 7.00 6.00 ACCEPTABLE OPERATING I (2500,5.0) 5.00 2 REQUIRED

.12 SHUTDOWN y

~

MA N g z 4.00 w a

5i' Z 3.00 o 3 "

UNACCEPATABLE c

@ OPERATING z-F REGION U

S m v) 2.00 Q

m m

1.00 .-

(450,1.0) 0.00 0 400 800 1200 1600 2000 2400 RCS BORON CONCENTRATION (ppm)

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

c

= COLR FOR VEGP UNIT 2 CYCLE 1 i

r- p- 7q 200 , I.- B / ,

180 g E/ / E

@ 160 l (0,161) / M 140

L / / E

• y uE / / E

/ / E 100 g E / / E E

[ [ BANK D l l*lE / / E 60 g B/ / . B

[(0,46) [ f l E / B 20 2 B / E o bem$Yd$$d mummmmmmmmanummmmmmmmmmad 0 20 40 60 80 100 RELATIVE POWER (PERCENT)

FIGURE 3 ROD BANK INSERTION LIMITS VERSUS THERMAL POWER

,e m= COLR.FOR VEGP< UNIT 2 CYCLE 1 ,

140 i

-120- .

i

-j

.jon UNACCEPTABLE OPERATION i

( 11,90) (11,90) 80 .

a. / 3 f

, 'N.

1 E

l E y 60 r ACCEPTABLE OPERATION O f n

=y. ( 31, 50) (31,50)

L p- 1 40 20 l-l' e

0

=

50 -40 -30 -20 -10 0 10 20 30 40 50~

FLUX DIFFERENCE, Al(percent)

L FIGURE 4

. AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER

.a. . -

Q

<g COLR FOR VEGP-. UNIT 2 CYCLE 1 s.-

+;

1.50 1.25-1.00 -mummmmmmmmmmmeunummmmmmmmmmme 7

./ 8 -

0.75 3x

e'

,:s.

0.50: CORE HEIGHT K(Z) 0.000 = 1.000 6.000 1.000 0.25 10.835 0.939 >

12.000 0.652 0

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

FIGURE 5 K(Z) - NORMALIZED F Q (Z) AS A FUNCTION OF CORE HEIGHT

. . . . . . _ . . -