ML20096C616

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Rev 0 to North Anna 2,Cycle 9 Loading Pattern ET Core Operating Limits Rept
ML20096C616
Person / Time
Site: North Anna Dominion icon.png
Issue date: 04/30/1992
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20096C612 List:
References
NUDOCS 9205140147
Download: ML20096C616 (15)
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a NORTH ANNA 2 CYCLE 9 LOADING PATTERN ET CORE OPERATING LIMITS REPORT Revision 0 (Apr 92) i, l:.

N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 1 of 15 9205140147 920508 L.' PDR ADOCK 03000339 P PDR i

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1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for North Anna Unit 2 Cycle 9 has been prepared in accordance with the requirements of Technical Specification 6.9.1.7.

The Technical Specifications affected by this report are 12sted below:

I 3/4.1.1.4 Moderator Temperature Coef ficient 3/4.1.3.5 Shutdown Bank Insertion Limit 3/4.1.3.6 Control Bank Insertion Limits 3/4.2.1 Axial Flux Difference 3/4.2.2 ileat Flux Hot Channel Factor 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor and Power Factor Multiplier The cycle specific parameter limits for the specifications listed above are pre- i sented - in the following sections. These limits have been developed using the ,

NRC-approved methodologies specified in Technical Specifications 6.9.1.7, l

N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 2 of 15

.2.0 Operating Limits 2.1 Moderator Temperature Coefficient (Specification 3/4.1.1.4) 2.1.1 The Moderator Temperature Coef ficient /MTC) limits are:

The BOC/ARO-MTC shall ba less positive than or equal to +0.6E-4 Ak/k/'F below 70 percent of RATED THERMAL POWER.

.The BOC/ARO-MTC shall be less positive than or equal to 0.0E-4 Ak/k/'F at or above 70 percent of RATED TilERMAL POWER.

l The EOC/AR0/RTP-MTC shall be less negative than

-5.0E-4 Ak/k/'F.

2.1.2 The MTC Surveillance limits are:

The 300 ppm /AR0/RTP-MTC should be less negative than or equal to -4.0E-4 Ak/k/'F.

The 60 pps/ARO/RTP-MTC should be less negative than or equal to -4.7E-04 Ak/k/'F.

where: BOC - Beginning of Cycle ARO - All Rods Out EOC --End of Cycle RTP - RATED THERMAL POWER '

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N2C9/ET - Core Operating Limits Repvrt - Rev. 0 (Apr 92) Page 3 of 15

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l 2.2 Shutdown B. ink Insertion Limit (Specification 3/4.1.3.5) 2.2.1 The shutdown rods shall be withdrawn to at least 228 steps.

2.3 Control Bank Insertion Limits (Specification 3/4.1.3.6) 2.3.1 The control rod banks shall be limited in physical insertion as shown in Figure .1 FIGURE 1 NORTH ANNA UNIT 2 CYCLE 9 CONTROL ROD BANK INSERTION LIMITS VS. PERCENT RATED TilERMAL POWER

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0 0 .1 .2 .3 .4 .5 .6 .7 A .9 1.0 FULLY INSERTED FRACTION OF RATED THERMAL POWER N2C9/ET - Core Operating Limits Report - Rev 0 ( Apr 92) Page 4 of 15

2.4 Axial Flux Difference (Specification 3/4.2.1) 2.4.1 The AXIAL FLUX DIFFERENCE Limits are provided in Figure 2.

FIGURE 2 AXIAL FLU:: DIFFERENCE LIMITS AS t. FUNCTION OF RATED THERMAL POVER 120 110'

!~ '80)  ! " '00\

100

/ \ taittsp' aile

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"g

= n: ,

Attsptillt g -

r

= 10 '

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s, / \

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$ 340 '.;.

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W 5 20 :

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0 . l, ,,, . , , ,

20 30 40 50

-50 -40 -30 -20 -10 0 10 PERCERT fill! DIffEIEXCE (Dell A-1)

N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 5 of 15

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i 2.5 Heat Flux Hot Channel Factor-FQ(Z) (Specification 3/4.2.2) 2.5.1 The F q (Z) limits are:

2.19 Fq (Z) s ---

  • K(Z) for P > 0.5 P

Fq (Z) s 4.38

  • K(Z) for P s 0.5 THERMAL POWER where- P = ------------------- , and RATED THERMAL POWER K(Z) is provided in F.igure 3 2.5.2 The Fq(Z) Surveillance limits are: .

2.19 K(Z)

Fq (Z)H $ ---- w ----

for P > 0.5 P N(Z)

K(Z)

F9 (Z)M s 4.38 * ---- for P 5 0.5 N(Z)

THERMAL POWER where: P = ------------------ ,

RATED THERMAL POWER K(Z) is provided in Figure 3, and N(Z) values are provided in Figures 4 through 10.

N2C9/ET - Core Operating Limits Report - Rev. 0 ( Apr 92) Page 6 of 15

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FIGURE-3 l K(Z) - NORMALIZED FQ AS A FUNCTION OF CORE llEIGi!T l

l 1.20 (5. 0,1.0) 1.00 __

O _' (10.13.0.1373) 1 o 0.80- (

3 30.so .-

E

=

0.40 !2 4 0.4565) 9 0.20 0.00 0 1 2 3 4 5 6 7 8 9 to 11 1.

CORE HEICHI (FI) l.

1 1

N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 7 of 15 l

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-C FIGURE 4-4: N(Z) FUNCTION FOR N2C9 FROM 0 to 1000 MWD /MTU BURNUP TOP AND BOTTOM 15 PERCENT EXCLUDED AS-TER TECH SPEC 4.2.2.2.G HEIGHT N(Z)

(FEET) 1.210 10.20 -1.146 g,,,, 10.00 1.140

-N 9.80 1.133 51 \ 9.60 1.127 2 243 -\ 9.40 1.119 1.220 9.20 1.114 g~ 1\ 9.00- 1.109

= 1.2H 8.80 1.110

, $'g,,,, 8.60 1.114 i:

g T 8.40 1.122 3 t,tgg \ 8.20 1.130 E 8.00 1.136 St.148 \ '

7.80 1.138

$ 1.120 \ [\- -[ 7.60 7.40 1.138 1.135

" 7.20 1.129 7.00 1.122

-1.stg 6.80 1.116--

0 1 2 3 4 5 6 7 8 9 10 11 12 f*I O.

COREHEltHi(FT) 6.20 1.110

!- 6.00 1.111

=5.80 1.113 5.60_ 1,112 5.40 1.112 5.20- 1.113 5.00 1.120 4.80 1.132 4.60 1.145

-4.40 1.155' 4.20 1.164

~

4.00 1.172 3.80 1.178 3.60 11.'183' 3.40 1.186 3.20 1.190-3.00 1.199 2.80- 1.210

'2.60 1.220 2.40 1.230 2.20 1.239 2.00 1.248 1.80 1.256 N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 8 of 15

-z ._____.__--_=___ ,. . . -

- . . . . . . . . 1 _ . . - __ _ - - - _ _ _ _ _

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. -J FIGURE-5 N(Z) FUNCTION FOR N2C9 FROM 1000 to 3000 MWD /MTU BURNUP

- TOP AND BOTTOM 15 PERCENT FXCLUDED AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z)

(FEET)

-1.280 10.20 1.146 10.00 1.140 1.140 g 9.80 1.133 5g ,,g ( 9.60 1.127

-O 9.40 1.119 .-

t .!!0 1 9.20 1.114 3

= 1.208

-\ 9.00 8.80 1.109 1.110 E

' ;I'IH k T 8.60 8.40 1.114 1.122 3,,gg \ 8.20- 1.130

8.00 1.136 S1.14g / 7.80 1.138 g " \ Ld [\ \/ -/ 7.60 1.138 llfh

^

o 1.188 -

7.00 1.122 6.80 1.116

"' 6.60 1.113 0' 1 2- 3 4 5 6 7 8 9 10 11 12 6.40 1.110 ,

6.20 1.110 COREHEICHT(FI) 6.00 1.111 5.80 1.113 5.60 1.112 5.40 1.112 5.20 1.113 5.00 1.120 4.80~ 1.132 4.60- 1.14$

4.40 1.155 4.20 1.164 4.00 1.172 3.80 1.178 3.60 ~1.183 3.40 1.186-3.20 1.190

" 3.00 1.199-2.80 1.210 2.60 l'.220 2.40 1.230-2.20 1.239

2.00 1. z' 8 1.80 1~256 N2C9/ET - Core Operating Limits Report - Rev. 0 ( Apr 92) Page 9 of 15

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,ne

=-

FIGURE 6~

, _ . N(2) FUNCTION FOR N2C9-FROM 3000 to 5000 MWD /MTU BURNUP TOP AND BOTTOM 15 PERCENT- EXCLUDED AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z)

(FEET)

~1.200 10.20 1.186 10.00 1.185 '

I*III g  ?.80 1.189

( -_

9.6C 1.197

{g*34,

- \- ,

[ ---

9.40 9.20 1.203 1.210 h'1.228

-= 1.200 \ / \-- 9.00 1.219 8.80 -1.227 E

' EI *III

! \ - 8.60 1.234 '

T

\ /

/ 8.40 8.20 1.238 1.241 1.181

I _. 8.00 1.241 S1, tog / 7.80 1.240 g

1.128

\ -

7.60 7.40 1.237 1.231 7.20 1.225 I'I'8 7.00 1.216 g,,,, 6.80 13206 6.60 1.194 0 1 2 3 4. 5 l- 7 8 9 10 *11 12 6.40 1.179 6.20 1.165 CotEilEIGHT(FT)-

6.00 1.151 5.80 1,.'1 5.60 1, ,

5.40 1.R 5.20 1.117 5.00 -1,119 4.80 1.-130 4.60 1.145 4.40 1.155 4.20 1.164 4.00 1.172 3.80 1.178 3.60 1.183-.

3,40 l.186 3.20 1.190 3.00 1.199 2.80 -- 1. 210 -

2.60 1.220 2.40 1.230 2.20 1.239 2.00 1.248 1.80 1.256 N2C9/ET - Core Operating Limits Report - Rev 0 (Apr 92) Page 10 of 15

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= FIGURE 7 N(Z) FUNCTION FOR N2C9-FROM 5000 to 7000 MWD /NTU BURNUP-TOP AND B0170M 15 PERCENT EXCLUDED AS PER TECH SPEC 4.2.2.2.0 HEIGHT N(Z)

(FEET) 1.210 10.20 1.166 1.2 H 10 r0 1.183 9.80 1.189 5 .248 ---

9.60 1.197

{1

-1 [ 9.40 9.20 1.203 1.210 L h ,220

= 1.280 / k 9.00 8.80 1.219 1.227 E

E I'"'

! \ - 8.60 8.40 1.234 1.238 8,20 1.241

- e 1.100 ,

8.00 1.241 St.143 \ 7.80 1.240 g

1.128

\ [ 7.60 7.40 1.237 1.231 1'U8 \ g

! 7.20 7.00 1.225 1.216-3,,,, -6.80 1.206 6.60 1.194 0 -1 2 -3 4- 5 E- I i 10 11 12 6.40 1.180

-;0ttHEICHT(FT) 6.20 1.165 6.00 1.151 5.80- 1.141 5,60 1.134 5.40 1.128 5.20 1,118 5.00 1.108 4.80 1.098 4.60 1.092 4.40 1.090 4.20 1.092 4.00 1.099 3.80 1.103' 3.60 1.107 3.40 1.109 3.20 1.113 3.00 1.119 2.80- 1.126 2.60 -1.132 2.40 1.137 ,

2.20 1.141 2.00 1.144 1.80 1.147 N2C9/ET - Core Operating Limits Report - Rev i (Apr 92) Page 11 of 15

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FIGURE 8

'0 N(Z) FUNCTION FOR N2C9 FROM 7000 to 9000 MWD /MTU BURNUP TOP AND BOTTOM 15 PERCENT EXCLUDED AS PER TECH SPEC 4.2.2.2.0 ifEIGHT N(2) i (FEET) l

'" - 10.20 1.186 l 1.280 10.00 1.185:

9.80 1.189 01 9.60 -1.197

-E=.248

1.!!D ,

[ 9.40 9.20

.1.203-1.210 -1 j,,,,, /

\ 9.00 8,80 1.219 1.227

= g, igg 8.60 1.234 j L

[ 8.40 1.238 '

8.20 1.241 '!

3 1.10s

5 8.00 1;241

.g1.148 s' [ 7.80 1.240 E *g, \ /

! 7.60 7.40 1.237 1.231 1.188

> 7.20 1.225-

.\./ 7.00 1.216 1.333 6.80 1.206 5

6.60 1.194 0 1 2 J. 4 6 7 8 9 10 11 12 6.40 1.180 CORE.HEICHI(FT) 6.20 1.165 6.00 1.151 5.80 1.141 5.60 1.134 5;40 1.128 5.20 1.118 5.00 1.108-4.80 1.098 4.60- 1.092:

4.40 1.090 4.20 1.092 4.00 1.099 3.80 1.103 3.60 1.107-3.40 1.109 4

3.20- l'.113 3.00 1.119 2.80 1.126 2.60 l'.132 2.40 1.137 2.20 1.141 2.00 1.144 1.80 1.147 N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 12 of 15

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FIGURE 9 N(Z)-FUNCTION FOR N2C9 FROM 9000 to 16100 MWD /MTU BURNUP TOP AND BOTTON 15 PERCENT EXC1.UDED AS PER TECH SPEC 4.2.2.2.0 HEIGHT N(Z)

(FEET)

1. 2 H 10.20 1.191 g,,gg 10.00 1.188 9.80 1.190 5 .2431

/ -

9.60 1.197

.k [ 9.40 1.203 C .2281 9.20 1,210 g*

r

[ \ 9.00 8.80 1.219 1.227 g g ,3,4 / 8.60 1.234

= _

8.40 1.238 3 1.163 8.20 1.240 g

g1.141

\-

g

/ 8.00 7.80 1.242 1.244 g ,..121 gj ~ 7.60 1.247 7.40 1.250 9,g,, 7.20 1.251 7.00 1.247 1.ses .

6.80 1.242 60- 1.

-0 'I '2 3 4 5 6 7 8 9 10 11 12 49 COREHEIGHT(FT) 6.20 1.207 -

6.00 1.193 5.80- 1.179 5.60 1.169 5.40 1.159 5.20 1.141 5.00 1.129 4.80 1.126 4.60 1.127 4.40 1.128 4.20 1.129-4.00 -1.127 3.80 1.124 3.60 1.121 3.40 1.120

-3.20 1,124 3.00 1.128 2.80 -1.136' 2.60 1.141 2,40 -1.148 2.20 1.156 2.00 1.164 1.80 -1.171 N2C9/ET core Operating Limits Report - Rev. 0-(Apr 92) Page 13 of 15

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FIGURE 10

-- N(Z) FUNCTION FOR N2C9 FROM 16100 MWD /MTU TO EOC TOP AND BOTTOM 15 PERCENT EXCLUDED AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z)

(TEET) 1 780 10.20 1.192 10.00 1.189 9.80 1.183 5 .240 / 9.60 1.180

{1 9.40 1.180

-- 1

[ 9.20 1.188 3

= 1.200 220 ~

r f \ 9.00 8.80 1.199 1.213 E

EI *lII

/ \/ 8.60 8.40 1.223 1.231

$1.180 \ 8.20 1.237

8.00 1.241 S1.140 [ 7.80 1.244 j \j ~

! 7.60 1.247 1.120 7.40 1.25C 7.20 1.251 1.100 7.00 1.248 1.C30 6.80 1.242 0 1 2 3 4 5 6 7 8 9 10 11 12 0 .2 6.20 1.207 COREHEIGHT(FT) 6.00 1.193 5.80 1.179 5.60 1.169 5.40 1.159 5.20 1.141 5.00 1.129 4.80 1.126 4.60 1.127 4.40 1.128 4.20 1.129 4.00 1.127 3.80 1.124 3.60 1.121 3,40 1.120 3.20 1.124 3.00 1.128 2.80 1.136 2.60 1.141 2.40 1.148 2.20 1.156 2.00 1.164 1.80 1.171 N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 14 ef 15 l

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2.6 Nuclear Enthalpy Rise Hot Channel Factor - Fall (N) and Power Factor Nultiplier (Specification 3/4.2.3) l Fall (N) 5 1.49 * (1 + 0.3 * (1 - P))

THERMAL POWER where: P = -------------------

RATED THERMAL POWER 1

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N2C9/ET - Core Operating Limits Report - Rev. 0 (Apr 92) Page 15 of 15 j l

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