ML20155K646

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Rev 1 to North Anna Unit 2,Cycle 5,Relaxed Power Distribution Control Core Surveillance Rept for FQ=2.20
ML20155K646
Person / Time
Site: North Anna Dominion icon.png
Issue date: 05/22/1986
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20155K636 List:
References
NUDOCS 8605290091
Download: ML20155K646 (9)


Text

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ATTACHMENT 1 NORTH ANNA UNIT 2, CYCLE 5 RPDC CORE SURVEILLANCE REPORT FOR FQ = 2.20 REVISION 1 8605290091 860522 PDR P ADOCK 05000339 PDR

NORTH ANNA UNIT 2 CYCLE 5 CORE SURVEILLANCE REPORT, REV. 1 This Core Surveillance Report is provided in accordance with Section 6.9.1.7 of the North Anna Unit 2 Technical Specifications.

The Burnup-dependent Cycle 5 N(z) function for Technical Specification 4.2.2.2 is shown in Figures 1-6. N(z) was calculated according to the procedure of VEP-NE-1A.

The N(z) function

  • will be used to confirm that the heat flux hot channel factor, FQ(z), will be limited to the Technical Specifications values of FQ(z) 5 2.20 K(z), P > 0.5 and P

FQ(z) 1 4.40 K(z), P 5 0.5.

The Cycle 5 Axial Flux Difference (AFD) limits for Technical Specification 3.2.1 are shown in Figure 7. These limits were calculated according to the methods of VEP-NE-1A and are the same as the cycle 4 limits.

The limits on Axial Flux Difference assure that the FQ(z) upper bound envelope is not exceeded during either normal operation or in the event of xenon redistribution following power changes.

The N(z) function, when applied to a power distribution measured under equilibrium conditions, demonstrates that the initial conditions assumed in the LOCA analysis are met, along with the ECCS acceptance criteria of 10CFR50.46.

80R625RCA306

N(Z) FUNCTION TOP AND BOTTOM 15% EXCLUDED NORTH ANNA UNIT 2 CYCLE 5 AT 2775 MW AS PER TECHNICAL SPECIFICATION 4.2.2.2.G BURNUPS 500 TO 1,000 MWD /MTU HEIGHT N(Z) HEIGHT N(Z)

(FEET) (FEET) 0.0 . 6.2 1.143 0.2 . 6.4 1.152 0.4 . 6.6 1.161 i,..

0.6 . 6.8 1.167 0.8 . 7.0 1.172 1.0 . 7.2 1.174 1.2 . 7.4 1.175

,, 1.4 . 7.6 1.174 o 1.6 . 7.8 1.171 E 1.8 1.302 8.0 1.167 8 i.3-

- 2.0 1.292 8.2 1.163

[

2.2 1.280 8.4 1.160 j 2.4 2.6 1.268 1.254 8.6 8.8 1.156 1.151

=

5 2.8 1.241 9.0 1.143

" 3.0 1.228 9.2 1.137

" 3.2 1.217 9.4 1.135 t i.r-

\' 3.4 1.206 9.6 1.136 I 3.6 1.198 9.8 1.138

[ m 3.8 1.194 - 10.0 1.141 4.0 1.191 10.2 -.1.142 lm 4.2 1.186 10,4

( v- .

V 4.4 1.179 10.6 .

4.6 1.171 10.8 .

i- 4.8 1.160 11.0 .

5.0 1.148 11.2 .

5.2 1.136 11.4 .

5.4 1.129 11.6 .

5.6 1.126 11.8 .

5.8 1.131 12.0 .

i 6.0 1.135 -

n.0 0 2 4 6 8 10 12 CORE HLf0HI trtEi!

Figure 1 - N(Z) Function for N2C5 at 2775 MW from 500 to 1,000 MWD /MTU Burnup

N(Z) FUNCTION ,

TOP AND BOTTOM 15% EXCLUDED NORTH ANNA UNIT 2 CYCLE 5 AT 2775 MW AS PER TECHNICAL SPECIFICATION 4.2.2.2.G BURNUPS 1,000 TO 3,000 MWD /MTU i.s-l HEIGHT N(Z) HEIGHT N(Z)

(FEET) (FEET) 0.0 . 6.2 1.143 0.2 . 6.4 1.152 0.4 . 6.6 1.161 i.4 0.6 . 6.8 1.167 0.8 . 7.0 1.172 1.0 . 7.2 1.174 1.2 . 7.4 1.175 a 1.4 . 7.6 1.174 0 1.6 . 7.8 1.171 l 1.8 1.302 8.0 1.167 y53 3 2.0 1.292 8.2- 1.163 t 2.2 1.280 8.4 1.160 E 2.4 1.268 8.6 1.156

" 2.6 1.254 8.8 1.151 u 2.8 1.241 9.0 1.143 3.0 1.228 9.2 1.137 i '2 kx 3.2 3.4 1.217 1.206 9.4 9.6 1.135 1.136 3.6 1.198 9.8 1.138 l

t

\ N 3.8 1.194 10.0 1.141 E

h \ v -

4.0 4.2 1.191 1.186 10.2 10.4 1.142 4.4 1.179 10.6 .

4.6 1.171 10.8 .

4.8 1.160 11.0 .

5.0 1.148 11.2 .

5.2 1.136 11.4 .

5.4 1.129 11.6 .

5.6 1.126 11.8 .

5.8 1.131 12.0 .

, ,, j 6.0 1.135 0 2 4 6 e to 12 LORE HEIGHT 1FLET)

Figure 3 - N(Z) Function for N2C5 at 2775 MW from 1,000 to 3,000 MWD /MTU Burnup

N(Z) FUNCTION .

TOP AND BOTTOM 15% EXCLUDED NORTH ANNA UNIT 2 CYCLE 5 AT 2775 MW AS'PER TECHNICAL SPECIFICATION 4.2.2.2.G BURNUPS 3,000 TO 5,000 MWD /MTU i.s-

' HEIGHT i HEIGHT N(Z) N(Z)

(FEET) (FEET) 0.0 . 6.2 1.188 0.2 . 6.4 1.193 0.4 . 6.6 1.201 i.4= 0.6 . 6.8 1.212 0.8 . 7.0 1.221 11.0 . 7.2 1.226

1.2 . 7.4 1.227 n 1.4 . 7.6 1.225 l 1.6 . '7.8 1.219 j ,1. 8 2.0 1.218 1.210

-8.0 8.2 1.210 1.197 u i.s - ,

l '

2.2 1.201 8.4 1.184 j -

2.4 1.192 8.6 1.176 a -

2.6 1.180 8.8' 1.172 u 2.8 1.170 9.0 1.163

" '- 3.0 1.162 9.2 1.158 l

L i 2-N s

\

/'

/\ \

3.2 3.4 3.6 1.161 1.163 1.166 9.4 9.6 9.8 1.156 1.158 1.159 I

[ 3.8 1.167 10.0 1.161

^ N v 4.0 1.165 10.2 1.162

'nl 4.2 1.162 10.4 .

4.4 1.160 10.6 .

4.6 1.160 10.8 .

5b 4.8 ~ 1.157 11.0 . ,

5.0 ~1.154 11.2 .

5.2 1.158 11.4 .

5.4 1.166 11.6 .

5.6 1.174 11.8 .

5.8 1.181 12.0 .

6.0 1.184 1.0 C 2 4 6 8 to 12 00RC HE!CMT (FELT)

Figure 3 - N(Z) Function for N2C5 at 2775 MW from 3,000 to 5,000 MWD /MTU Burnup

N(Z) FUNCTION ,

TOP AND BOTTOM 15% EXCLUDED NORTH ANNA UNIT 2 CYCLE 5 at 2775 MW AS PER TECHNICAL SPECIFICATION 4.2.2.2.G BURNUPS BETWEEN 5,000 AND 7,000 MWD /MTU HEIGHT N(Z) HEIGHT N(Z)

(FEET) (FEET) 0.0 . 6.2 1.188 0.2 . 6.4 1.193 0.4 . 6.6 1.201 i.4 0.6 . 6.8 1.212 0.8 . 7.0 1.221 1.0 . 7.2 1.226 7.4 1.2 . 1.227

= 1.4 . 7.6 1.225 2

1.6 . 7.8 1.219 E 1.8 1.218- 8.0 1.210-0 i.3- 2.0 1.210 8.2 1.197 l 2.2 1.201 8.4 1.184 i 2.4 1.192 8.6 1.176 a 2.6 1.180 8.8 1.172 u 2.8 1.170 9.0 1.163 n 3.0 1.162 9.2 1.158 j N N 3.2 1.161 9.4 1.156 i i 2- \ / ' 3.4 1.163 9.6 1.158 I / \ 3.6 1.166 9.8 1.159

[ hu 3.8 1.167 10.0 1.161

' N -

4.0 1.165 10.2 1.162

[

a 4.2 1.162 10.4 .

4.4 1.160 10.6 .

4.6 1.160 10.8 .

i i- 4.8 1.157 11.0 .

5.0 1.154 11.2 .

5.2 1.158 11.4 .

5.4 1.166 11.6 .

5.6 1.174 11.8 .

5.8 1.181 12.0 .

6.0 1.184 i.c 0 2 4 6 e 10 12 CCRE HEfGMT tFLET4 Figure 4 - N(Z) Function for N2C5 at 2775 MW from 5,000 to 7,000 MWD /MTU Burnup

t N(Z) FUNCTION '

TOP AND BOTTOM 15% EXCLUDED NORTH ANNA UNIT 2 CYCLE 5 AT 2775 W

. AS PER TECHNICAL SPECIFICATION 4.2.2.2.G BURNUPS 7,000 TO 14,500 MWD /MTU t.s- HEIGHT N(Z) HEIGHT N(Z)

(FEET) (FEET) 0.0 . 6.2 1.210 0.2 . 6.4 1.223 0.4 . 6.6 1.233 0.6 . 6.8 1.241 i.*- 0.8 . 7.0 1.244 1.0 . 7.2 1.246 1.2 . 7.4 1.244 1.4 . 7.6 1.240 a 1.6 . 7.8 1.234 0 1.8 1.215 8.0 1.226 e 2.0 1.207 8.2 1.213 y 5 3- 2.2 1.199 8.4 1.199 L 2.4 1.189 8.6 1.187 a 2.6 1.178 8.8 1.179 7 2.8 1.170 9.0 1.172 X ] 3.0 3.2 1.162 1.160 9.2 9.4 1.169 1.167 0 \ \ 3.4 1.161 9.6 1.169 I ' \ 3.6 1.165 9.8 1.169 l \" ~

3.8 1.165 10.0 1.171 y fw 4.0 1.164 10.2 1.171 E 4.2 1.161 10.4 .

" 4.4 1.159 10.6 .

4.6 1.159 10.8 .

4.8 1.157 11.0 .

' 11.2 5.0 1.154 .

5.2 1.158 11.4 .

5.4 1.167 11.6 .

5.6 1.173 11.8 .

5.8 1.182 12.0 .

6.0 1.195 2.c 6 e 10 12 h 2 4 CCRE *tC 'OMT t Ft.E T I _

from 7,000 to 14,500 MWD /MTU Burnup

N(Z) FUNCTION '

TOP AND BOTTOM 15% EXCLUDED NORTH ANNA UNIT 2 CYCLE 5 AT 2775 MW

. AS PER TECHNICAL SPECIFICATION 4.2.2.2.G BURNUPS GREATER THAN 14,500 MWD /MTU i.s HEIGHT N(Z) HEIGHT N(Z)

(FEET) (FEET) 0.0 . 6.2 1.210 0.2 . 6.4 1.224 0.4 . 6.6 1.233 0.6 . 6.8 1.241 i.4- 0.8 . 7.0 1.244 1.0 . 7.2 1.246 1.2 . 7.4 1.244 1.4 . 7.6 1.240

= 1.6 . 7.8 1.234 2 1.8 1.214 8.0 1.226

[ 2.0 1.207 8.2 1.213 y i 3- 2.2 1.198 8.4 1.199 t 2.4 1.189 8.6 1.187 E 2.6 1.179 8.8 1.179 7 2.8 1.170 9.0 1.172 u 3.0 1.163 9.2 1.169 3.2 1.160 9.4 1.167 3.4 1.153 9.6 1.169 0 s' k 3.6 1.151 9.8 1.169 i 5 2-l t

\N \ w-3.8 4.0 1.153 1.156 10.0 10.2 1.171 1.171 e b m 4.2 1.156 10.4 .

" 4.4 1.156 10.6 .

4.6 1.154 10.8 .

4.8 1.149 11.0 .

5.0 1.145 11.2 .

5.2 1.146 11.4 .

5.4 1.155 11.6 .

5.6 1.163 11.8 .

5.8 1.177 12.0 .

6.0 1.194 i.c C 2 4 C 6 iO it fCRE *tE!GHT (F EET ) Figure 6 - N(Z) Function for N2C5 at 2775 MW greater than 14,500 MWD /MTU Burnup

I

! :j

. i 120 110-(-15,100) (+6,100) 100 Unacceptable 90 i

O Ope ration '

' & 80 \

Acc eptable

! g Opa ration D3 60 A 50 -

g . .

j $ 40 A

l 0 30 l =

l 20 l

l l 10 0

-50 -30 -10 10 30 50 FLUX DIFFERENCE (DELTA-I) PERCENT Figure 7 - Axial Flux Difference Limits as a Function of Rated Thermal Power for North Anna Unit 2 Cycle 5

! _ _ _ _ _