ML20216A897

Rev 0 to Cycle 13 Pattern Ud COLR for North Anna Unit 2

ML20216A897
Person / Time
Site:	North Anna
Issue date:	05/06/1998
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
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ML20216A886	List: ML20216A881 ML20216A897
References
NUDOCS 9805140294
Download: ML20216A897 (9)

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CORE OPERATING LIMITS REPORT (COLR)

NORTH ANNA UNIT 2 CYCLE 13 PATTERN UD 1

i Virginia Electric and Power Company Page 1 9805140294 980506 POR ADOCK 05000339 P

PDR

N2C13 CORE OPERATING LIMITS REPORT 1

1.0 INTRODUCTION

The Core Operating Limits Report (COLR) for North Anna Unit 2 Cycle 13 has been prepared in accordance with Technical Specification 6.9.1.7 The Technical Specifications af fected by i

this report are listed below.

j 3/4.1.1.4 Moderator Temperature Coefficient 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 Heat Flux Hot Channel Factor 3/4.2.3 Nuclear Enthalpy Rise Hot Channel Factor and Power Factor Multiplier i

The cycle-specific parameter limits for North Anna 2 Cycle 13 for the specifications listed above are provided on the following

pages, and were developed using the NRC-approved methodologies specified in Technical Specification 6.9.1.7.

l N2C13/UD COLR Rev 0, April 1998 Page 2

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2.0 OPERATING LIMITS 1

2.1 Moderator Temperature Coefficient (Specification 3/4.1.1.4) 2.1.1 The moderator temperature coefficient (MTC) limits are:

The BOC/ARO-MTC shall be 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 0

i (zero) Ak/k/ F at or above 70 percent of RATED THERMAL POWER.

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The EOC/ARO/RTP-MTC shall be less negative than -S.0E-4 j

Ak/k/ F.

2.1.2 The MTC surveillance limits are:

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

The 60 ppm /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 i

EOC - End of Cycle RTP - RATED THERMAL POWER l

l 2.2 Shutdown Bank Insertion Limit (Specification 3/4.1.3.5) 2.2.1 The shutdown rods shall be withdrawn to 227 steps.

i 2.3 Control Bank Insertion Limits (Specification 3/4.1.3.6) l 2.3.1 The control rod banks shall be limited in physical insertion as shown in Figure A-1.

I N2C13/UD COLR Rev 0, April 1998 Page 3

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4 2.4 Axial Flux Difference (Specification 3/4.2.1) 2.4.1 The axial flux difference limits are provided in Figure A-2.

2.5 Heat Flux Hot Channel Factor-FQ(z) (Specification 3/4.2.2) 2.5.1 The Fg(z) limits are:

2.19 Fg(z)' 5 ---

• K(z) for P > 0.5 P

l Fg(z) $ 4.38

• K(z) for P $ 0.5 THERMAL POWER where:

P = -------------------

and RATED THERMAL POWER K(z) is provided in Figure A-3 2.5.2 The Fg(z) surveillance limits are:

2.19 K(z)-

Fg(z)M $ ---

for P > 0.5 P

N(z)

K(z)

Fg(z)M $ 4.38 * ----

for P $ 0.5 N(z)

N2C13/UD COLR Rev 0, April 1998 Page 4

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THERMAL POWER where:

P = -------------------

RATED THERMAL POWER l

K(z) is provided in Figure A-3, and N(z) is a non-equilibrium multiplier on Fg(z)M to account for power distribution transients during normal operation, provided in Table A-1. The top and bottom 15% of l

l the core is excluded per TS 4.2.2.2.G.

2.6 Nuclear Enthalpy Rise Hot Channel Factor - FAH(N) and Power Factor Multiplier (Specification 3/4.2.3)

FAH(N) 5 1.49*{1 + 0.3*(1 - P))

THERMAL POWER where:

P = -------------------

RATED THERMAL POWER l

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i N2C13/UD COLR Rev 0, April 1998 Page 5

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-N2C13 NORMAL OPERATION N(z)'s i

.]_

~~ I

_ _ d_._..__. Db.le A-1 I ~

)

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i

^

Height O to 1000 1000 to 3000 3000 to SOOO L5oooio 7oool 7ooo to Sooo Sooo to '7700 i 17700 to EOC

_ MWD /MTU { MWD /MTU j MWD /MTU] MWD /MTU ! _ MWD /MTU MWD /MTU i MWD /MTU Node (feet)

_10. j _10.2 1.159 L1.159 !

1.159 1.153 1.153 1.153_i._1.118_ j 11 10.0 m.1158 1 1.158 1.158 1.152 1

1.152 1.152 l

1.119 g

.1.155j _1.155_ _ _1.155_._ 1.150 _. 1.150 _ j 1.150. _ ! _ 1.125 _

_12_j 9.8 13 [ 9.6 1.155 l 1.155 1.155 1.149 1.149 1.149 1.134 1.149_ [.

1.141 14j 9.4 ! 1.156_.E 1.156_ _

1.156 1.149 _ [i_ 1 149_ _.

1.153 1.153 _.i _ 1 153 1.149 15._ 9.2, 1 _l.162

_1.162 1.162 16 ! 9.0 1.171 1.171 _

_ 1.171 1.162 __1.162, 1__ 1.162_ _ ( __1.157__

17 ; 8.8 1.181 i 1.181 1.181 1.173 1.173_L 1.173 1.166 _j 1.188_ 4 1.188_ _ _ 1.1_88._..

1.181 _ _ _1.181_ i 1.180 _ l.

1.177 18 L 8.6 19J 8.4 a 1.193 !

1.193 1.193 1.187 1.187_ 1 1.187 1.187

__20 8.2j 1_.197

_._1.197_.

_ 1.197 _

1.193

. 1.193 1.196. _,_

1.1_96 _

21. 8.0. 1.200 1.200 1.200 1.196 1.196 1.203 1

1.203 1.205T 1.203 1.198 l

1.198 I

1.209 l

1.209

[23 1 [7.6 ] ] 2_05))205 T 1.2057 1.198.

22 8

1.203 4

1

( 1.21 1

1.23 3

~

1.197 1 1.217 _

ll. _.1.217 _ _,

_241 74 1.205. '

1.205 l _1.205 1.194 I

1.219 1.219 25 l 7.2 ' 1.204 1.204 i

1.204 1.194

_26.a 7.0_ j. 1.200_ [ _1.200

_I'200_ _1.190... _ 1.190 3 55 ] _ 1.218 _

[__27__j _.6.8 J_1.196_;_ 1.196. 4 1.196 1.184 __ _ 1.184

_1.217 1.217 i

1.170, 1_ 1.214.. ] _1.214_ _.

L28.!. 6.6 ; 1.190j 1.190

_ _1.190_ _._ 1.177. 1 1.177 J

6.4a 1.183 1 1.183 1.183 1.170 l

1.210 1.210 29 1

. 1.172 i 1.172 l

1.172

[ 1.162 1.16?.

j 1.202 1.202 f' [6.26.0((.l[62 ].1621_1162__[i.ISA 3.15 Q ii.195~.

I.195,_,

30 31

_32. ( _ 5.8 ! 1.149_j 1.149 !

_1.149 _._1d4411.144 L 1.184_ L1.184 j

33 i 5.6 i 1.135 1 1.135 1.135 1.132 1.132 l

1.173 l

1.173 l

34 K4

_1._122_ j_ 1.122. [ _1.122_. _.1.1j9.a._1.11Q _ 1.156 1.156 35 i 5.2 l 1.111 i 1.111 i

1.111 1.106 l

1.106 i

1.135~

1.135

~

~

36 I 5.0 i 1.105 _i _ 1.105 ] ] 105 1.098.. I i.09iT I3i9 1.119 37 4.8 ! 1.104~i 1.104 1.104 1.096 1.096 1.113 1.113 38 4.6 i 1.1 67 1.107 1.107 1.098 1.098 '~i 1.115 1.115 39

_ 4.d[1.113 i.113 1.113 1.100 1.100

_ 1.118[ _

I.118]

~

~

l 1.118 1.118 1.104

_1.121._ __1.121_

_._40 _.. 4.2 ] 1.118

[_1.j04_ _

41 4.0 1.122 i 1.122 1 _ 1 122 1.109 1.109 1.123 1.123 i

2

42__ _3.8_ _ 1.126 _ 1.126 _ _1.126_.

1.114 _ __1.114. _ __ 1.124_ 1.124_._

43 3.6 1.131 1.13L 1.131 1.121 1.121

_1.127 _

1.127 44_ 4.3.4

= 1.136 1.136 _

_ 1.136 _ _ 1.130 _ _1.130.._ L1.j31__j 1.130 45 : 3.2 i 1.143 1.143 1.143 1.140 1.140 l

1.140 t

1.138 t

46

~3.0 j 1.149~[

1.149 1.150 1.150 1.150 1.151 l

1.150 47 2.8 17.~157 !

1.157 1.159 1.159 l.159 1.166 i

1.166 l

_ 48._.[ 2 [ 3 66 1 1.166 _ _ _1.167_ _._.1d68 1 168 _ _ _1.178

__ 1.178 _

I 49 1 2.4j 1.175 1.175__L.176 1.176 1.176 j 1.191 1

1.191 1

[_ 1.184_1.191_p.1.203_ ]

1.203 50 2.2 l _1. 183 _._ 1.183 _ !

1.184 1.184 j _1.213_ j 1.213 _

L.0_(1.190 1.190 1.191 1.191 51 2

_52l 1.8. ! _1.197 j 1.197 [ 1.198

_1.198_.L 1.198 1.223_ [_1.223 j N2C13/UD COLR Rev 0, April 1998 Page 6

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f Figure A-1 Control Rod Bank Insertion Limits 230 Fully Wd position = 227 s:eps 210 200 (l.0,194 C-BAblK 190 180

/

j 170 160

/

r 150 i

/

e 140 f

/

l g 130 c'

~ ~ ~ " -

!D-BANK l

i g 120 (0,118; l l

110 8 100 0

/

y e0 a:

80 70 80 50 40

[

30 7

20

/

10

.N8, 0)

O O.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Fraction of Rated Thermal Power f

N2C13/UD COLR Rev 0, April 1998 Page 7

1 Figure A-2 N2C13 Axial Flux Difference Limits 120 110

(-12, 100)

(+E, 100) 100 Unacceptable Operation Unacceptable Operation

\\

80 i

/

Acceptabe Operation g

1 70 I

s 60 g

l

/

is l

(-27,50l

(+20, 50) n.

j 40 30 20 10 0

30

-20

-10 0

10 20 30 Percent Flux Difference (Delta-1)

N2C13/UD COLR Rev 0, April 1998 Page 8

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Figure A-3 K(Z)- Normalized FQ as a Function of Core Height 1.2 1.1

,6,1.0) j 1.0 N

N 0.9 (12,.925)

I 0.8 N

0.7 OwN3 I

4 0.6 I

i cc O

\\

A 0 s

.5 4

l x

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0.4 0.3 0.2 0.1 0.0 0

1 2

3 4

5 6

7 8

9 10 11 12 CORE HEIGHT (FT)

N2C13/UD COLR Rev 0, April 1998 Page 9