ML20094K335

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Core Operating Limits Rept
ML20094K335
Person / Time
Site: North Anna Dominion icon.png
Issue date: 02/29/1992
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20094K336 List:
References
NUDOCS 9203200225
Download: ML20094K335 (10)
v • d • e


Text

- - _ - - _ -..

1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for North Anna Unit 1 Cycle 9 has been prepared in accordance with the requirements of Technical Spec-ification 6.9.1.7.

-The Technical Specifications affected by this report are listed below:

3/4.1.1.4 Moderetor 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 The cycle specific parameter limits for the apscifications listed above are presented in the following sections. 'these Alaits have been developed using the i1RC-approved m.ethodologies

ecified in Technical Specifica-tions 6.9.1.7, 9203200225 920316 PDR ADOCK 05000338 P

PDR NIC9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 2 of 10

s 2.0 Operatis.g Limits 2.1 Hoderator 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 0.0E-4 Ak/k/'F at or above 70 percent of RATED THERMAL POWER.

The EOC/ARO/RTP-MTC shall be less negative than

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

l l

2.1.2 The MTC Surveillance limits are:

The 300 ppm /ARO/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 i

ARD - All Rods Out EOC -'End of Cycle RTP - RATED THERMAL POWER I

i N1C9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 3 of 10 1.

(

L2.2 Shutdown Bank Insertion Limit (Specification 3/4.1.3.5) 2.2.1 The shutdown rods shall be withdrawn to at least 228 steps.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 1 CYCLE 9 CONTROL ROD BANK INSERTION LIMITS VS. PERCENT RATED TilERNAL POWER FULLY WITHOAAWN 228

/ (.54.223)'

220

... l.

... [..

... +.........

.200 l... (.1,134)'

l..

180 1

(

l g....

., I g..

i i

3 E,,

g

~

.i i

[

t i

E j

j l

E a

i i.e : 120 E

(0.1181 l,,,,[

l

)

i i

g 100 j

3--.

,,g--

o

~ -l-

)

1--

1'

_ _ J.

g so

,..l i.

. L..q.

1_.-

=

..i t

e I

t to

+

-+ -

i

-I f

i

).

l l

40

.5..........

. i..

20 8

i I

(.048.01 I

t-i

0 0

.1

'2-

.3.

.4 A

A-

.7 A

.9

.1A FULLY INSERTED FRACTION OF RATED THERMAL POWER N1C9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 4 of 10 y

s

.. = -

7

]

V 2.4. Arial Flux Difference (Specification 3/4.2.1)

'2.4.1 The AXIAL FLUX DIFFERENCE Limits are provided in Figure 2.

FIGURE 2-AXIAL FLUX DIFFERENCE LIH1TS AS A FUNCTION OF RATED THERMAL POWER 120 110 :

100

f.. jp tool fel tool s";

f.

x 2 80 :

sp m..

Heeptell.. \\

-g

= TM-

=

/

.\\

,,,,.m.

Elli

/

\\

[

(-27 E0)

(128,H) o 40 5

M 30'i t

20 :

10:

0)

-50

-40 -10

-10 0

10 20 3D 40 50

- PERCENT flUI DifIERENCE (DEllA-1) j 1

i

-j i

l' I

NIC9:- Core Operating-Limits Report - Rev.1 (Feb 92)

Page 5 of 10 E

4 2.5 lleat Flux Hot Channel Factor-FQ(Z) (Specification 3/4.2.2) 2.5.1 The F (Z) limits are:

9 2.19 F (Z) 5 ----

  • K(Z) for P > 0.5 q

P F (Z) 5 4.38

  • K(Z) for P 5 0.5 9

THERHAL POWER where:

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

, and RATED THERMAL POWER K(Z) is provided in Figure 3 2.5.2 The F (Z) Surveillance lieits are:

9 2.19 K(Z)

F (Z)M S <--- * ----

for P > 0,5 q

P N(Z)

K(Z)

F (Z)d 5 4.38 * ----

for P 5 0.5 q

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 and 5.

NIC9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 6 of 10

1 FIGURE 3 K(Z) - NORMALIZED FQ AS A FUNCTION OF CORE HEIGHT t.20-g (6. D.O.M32)

(12.C 0.9132) o 0.80 M

C 30.60 E

0 7 40 7

0.20 0.00 O

1 2

3 4

5 6

7 8

3 10 11

)!

C0t[NElCHI(fi) l NIC9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 7 of 10

s' t

FIGURE 4 N(Z) FUNCTION FOR H1C9 FROM 9000 to 16600 MWD /NTU BURNUP TOP A"D BOTTOM 15 PERCENT EXCLUDED Ab PER TECH SPEC 4.2.2.2.G llEIGilT N(Z) 1.300 (FEET)

I* N 10.20 1.153 5.250

[\\

10.00 1.153 1

[

k 9.80 1.150 5 1.240--

/

\\

9.60 1.152 g

(

9.40 1.160

= 1.220:

\\

9.20 1.176 5'

s 9.00 1.191 2.2gg

\\

8.80 1.205 1

C I

8.60 1,216 5t, igg

\\

8.40 1.224 g

\\

/

8.20 1.231 E1.180 V

8.00 1.238 V

7.80 1.246 r,140 7.60 1.254 7.40 1.261 1.120 7.20 1.266 0

1 2

3 4

5 6

7 8

9 10 11 12 7.00 1.26' 6.80 1.270 COR[H[lCHI(Fi) 6.60 1.269 6.40 1.267 6.20 1.261 6.00 1.255 5.80 1.244 5.60 1.233 5.40 1.220 5.20 1.206 5.00 1.198 4.80 1.195 4.60 1.193 4.40 1.187 4.20 1.179 4.00 1.171 3.80 1.164 3.60 1.162 3.40 1.160 3.20 1.164 3.00 1.169 2.80 1.177 2.60 1.185 2.40 1.194 2.20 1.201 2.00 1.208 1.80 1.213 NIC9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 8 of 10

-m......

F'OV: E $

N(1) FUNCTION FOR N1C9 l' ROM 16600 MWD /MTU BURNUP TO ECL TOP AND BOTTON 15 PERCENT EXCLULED

'. l'ER TECH SPEC 4.2.2.2.0 llEIGHT N(Z) g.ng (FEET) 1.140-10.20 1.134 T.sgs.

[\\-

10.00 1.136 i

y

[

9.80 1.137 9.50 1.142

).343

[

9.40 1.156 2

9.20 1.176

= 1.!!p

)

\\

y g

9.00 1.192 8.80 1.205

= 1.200--

\\

[

5 8.60 1.216 8.40 1.225 31.140-

-m b

8.20 1.232 2 1.140-

\\

8.00 1.238 1.140--

\\

7.60 1.246 7.60 1.254 7.43 1.261 1.138 7.20 1.266 0

1 2

3 4

7 g

i tg 11 12 7.00 1.2f9 6.80 1.270 cot [ M(lCHT (F1) 6.60 1.269 6.40 1.267 6.20 1.261 6.00 1.255 5.80 1 244 5.60 1.233

$.40 1.220 5.20 1.206 5.00 1.198 4.S0 1.195 4.60 1.193 4.40 1.187 4.20 1.180 4.00 1.172 3.80 1.160 3.60 1.152 3.40 1.152 3.20 1.160 3.00 1.167 2.80 1.176 2.60 1.184 2.40 1.191 2.20 1.198 2.00 1.204 1.80 1.210 N'C9 - Core Operating Limits Import - Rev. 1 (Teb 92)

Page 9 of 10

O O

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

FAH(N) 5 1,49 * (1 + 0.3 * (1 P))

TilERMAL POWER wherst P=

--- -----~ -- - --

RATED T){ERMAL POWER NIC9 - Core Operating Limits Report - Rev. 1 (Feb 92)

Page 10 of 10

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