ML20236C792
| ML20236C792 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 03/15/1989 |
| From: | Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 89-001, 89-1, NUDOCS 8903220319 | |
| Download: ML20236C792 (11) | |
Text
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I
. VINGINIA ELECTRIC AND PowEn COMPANY RicnMOND, VIRGINIA 20261 l'
\\
W.R.CAurwanont l
March 15, 1989 x
l 1
United States Nuclear Regulatory Commission Serial No.89-001 1
Attention:
Document Control Desk PES /JRH:cdk i
Washington, D.C.
20555 Docket No.
50-339 License No. NPF Gentlemen:
)
I VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STAJION UNIT 2 RELOAD INFORMATION FOR CYCLE 7 l
North Anna Unit 2 completed its sixth cycle'of operation on February 20, 1989, and went into an outage for refueling.
The purpose of this letter is to transmit to you the Core Surveillance Report containing specific power distribution limits applicable for Cycle 7 operation and to advise you of our plans for Cycle 7 operation.
The Cycle 7 reload core was analyzed in accordance with the methodology documented in the approved topical report VEP-FRD-42, Revision I-A, " Reload Nuclear Design Methodology," using NRC approved codes as referenced in the topical report.
The information in the attached report was developed in accordance with our. topical report ' VEP-NE-1-A, " Relaxed Power Distribution Control Methodology and Associated FQ Surveillance. Technical Specifications."
These analyses were performed and reviewed by our technical staff.
The results of these analyses indicated that no key analysis parameters would become more limiting during Cycle 7 operation than the values assumed in the currently applicable safety analyses.
A review has been performed by both the Station Nuclear Safety and Operating Committee and the Safety Evaluation and Control Staff.
It has been determined that no unreviewed safe ~ty question as defined in 10 CFR 50.59 will exist as a
.h result of the Cycle 7 reload cere.
The Core Surveillance Report, which consists of the Cycle 7 N(z) function and the Axial Flux Difference Limits, is included as Attachment 1.
These limits are based upon the current total peding factor (Fn) limit of 2,19.
Technical Specification 6.9.1.7 requires that the Report be trovided to the NRC 60 days prior to cycle criticality unless a written waiver has been granted by the Staff.
For reasons noted in our letter Serial No.89-106, dated February 17, 1989, we were unable to meet the 60 day requirement.
A written waiver was requested at that time.
g0 8903220319 890315 1 }
PDR ADOCK 05000339 P
This letter.is provided for your 'information and planning.
However,. should you have questions, please contact us at your. earliest convenience.
.Very truly yours I
r W. R.;Cartwright Attachment 1.
Core' Surveillance Report for North Anna 2, Cycle 7 cc:
U.. S. Nuclear-Regulatory Connission 101.Marietta Street, N.W.
Suite 2900 Atlanta, GA 30323' Mr. J. L.LCaldwell.
NRC Senior Resident Inspector
' North Anna Power Station I
fk. '
k
NORTH ANNA UNIT 2 CYCLE 7 PATTERN JU CORE SURVEILLANCE REPORT 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 7 N(z) function for Technical. Specification j
4.2.2.2.C is shown in Figures 1-7.
N(z) was calculated according to the l
pro edure of VEP-NE-1-A.
i 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 2.19 K(z)
FQ(z) s ----------,
P > 0.5 and P
FQ(z) s 4.38 K(Z),
P s 0.5.
The Cycle 7 Axial Flux Difference (AFD) limits for Technical Specification 3.2.1 are shown in Figure S.
These limits wars calculated according to the methods of VEP-NE-1-A and are comparable to the Cycle 6 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(I) function, when applied to a power distribution measured under equilibrium conditions, demonstrates that the initial conditions assumee in the LOCA analysis are met, along with the ECCS acceptance criteria of 10CFR50.46.
i 9
' FIGlRE 1 - N(Z) FUNCTION FOR N2C7 AT 2893 MW FROM 150 to 1000 MWD /NTU BlRNUP TOP A E BOTTOM 15 PERCENT EXCLl0ED AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z)
(FEET) 1.80 1.220 2.00 1.213 2.20 1.206 2.40 1.198 2.60 1.190 2.80 1.182 3.00 1.173 i
3.20 1.165 3.40 1.158 3.60 1.152 3
1'22+00 3.80 1.145 h
4.00 1.138
\\
- 4.20 1.130 4.40 1.125 aet 4.60 "
1.123 ii
4.80 1.118 5.00 1.113 i
d 1 18+80 5.20 1.107 I
/
5.40 1.105 E
5.60 1.105 r
[
/
5.80 1.111 6.00 1.116 d
6.20 1.125 a
6.40 1.135 g 1.14+00 6.60 1.145 E
6.80 1.153 7.00 1.158 7.20 1.163 7.40 1.165
\\
7.60 1.167 7.80 1.169 1.10+00 8.00 1.170 8.20 1.171 0.00+00 2.00+00 4.00+00 8.00+00 8.00+00 1.00+01 8.40 1.171 COREHEIGHT(FEET) 8.60 1.169 8.80 1.165 9.00 1.157 1
9.20 1.152 9.40 1.150 9.60 1.155 9.80 1.162 10.00 1.170 10.20 1.177 i
}
FIGtRE 2 - N(Z) FUNCTION FOR N2C7 AT 2893 MW FROM 1000 to 3000 MWD /MTU BlRNUD TOP Af0 BOTTON 15 PERCENT EXCLlDED l
AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z)
(FEET) 1.80 1.220 2.00 1.213 2.20 1.206 2.40 1.198 1
1.2400 2.60 1.190 2.80 1.182 3.00 1.173 S
r 3.20 1.165 1 22+00
/
h 3.40 1.158 i
3.60 1.152 h
[
\\
{
3.80 1.145 4.00 1.138
\\
f
\\
5 4.20 1.130
- 1.20+00 4.40 1.125 f
i 4.60 1.124 0
4.80 1.121 E
\\
\\
5.00 1.120
= 1.18+00
\\
\\/
5.20 1.128 i
E j
j v
5.40 1.146 E
I 5.60 1.161 i
\\
/
5.80 1.176 a
E 1.1s+00
\\
/
6.00 1.189 S
\\
/
6.20 1.198 E
\\
/
6.40 1.208
\\
/
6.60 1.214 1.1400
\\
f 6.80 1.221 7.00 1.226
(
f 7.20 1.230 l
x 7.40 1.232 1'12+00
\\ [
7.60 1.232 7.80 1.231 l
0.00+00 2.00+00 4.00+00 6.00+00 0.00+00 1.00+g 8.00 1.228 l
COREHEIGHT(FEET) 8j f,.2jj 8.60 1.218 8.80 1.210 9.00 1.200 9.20 1.190 9.40 1.180 9.60 1.177 9.80 1.180 10.00 1.187 10.20 1.190 1
k I
W
. FIGlRE 3 - N(Z) FUNCTION T3 N2C7 AT 2893 MW FROM 3000 to 5000 MWD /MTU BlRNUP TOP AM) BOTTOM 15 PERCENT EXCLLDED-AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z)
(FEET) 1.80 1.162 2.00 1.155 2.20 1.147 2.40 1.138 2.60 1.129 2.80 1.124 3.00 1.121 1.231..
3.20 1.122 m
r 3.40 1.119
/
\\
3.60 1.119 3.80 1.121
/
\\
4.00 1.124 1.21+..
g 4.20 1.126 5
/
)
4.40 1.126 4.60 1.125 3i 1.1st..
f k
4.80 1.122 O
r 5.00 2.120 E
I
\\/
5.20 1.128 E
1.17...
I v
5.40 1.146 f
=
5.60 1.161
/
5.80 1.176 f
6.00 1.189
)
/
6.20 1.198 o
E
(
l 6.40 1.208
% ~1.15+..
\\
/
6.60
'1.214 E
\\
l 6.80 1.221
\\
l 7.00 1.226 1.13+..
t 7.20 1.230
\\
/
7.40 1.232
^/
7.60 1.232 7.80 1.231 1.11...
8,00 1.228 8:g 1:2;s 2......
i.... 1 COREHEIGHT(FEET) 8.60 1.218 8.80 1.210 9.00 1.200 9.20 1.190 9.40 1.180 i
9.60 1.177 9.80 1.180 10.00 1.187 10.20 1.190
l.
1, c
l FIGlRE 4 - N(Z) FUNCTION FOR N2C7 AT 2893 MW l
FROM 5000 to 7000 MWD /MTU BLRNUP TOP AlO BOTTOM 15 PERCENT EXCLWED AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z).
(FEET) l i
1.80 1.162 2.00 1.155 l
2.20 1.147 2.40 1.138 2.60 1.129
.2.80 1.124 1.23+00 3.00 1.121
^
g s
j K
3.20 1.122 3.40 1.119
/
.\\
3.60 1.119 1.21+00 3.80 1.121 i
[
k 4.00 1.124
=
4.20 1.126 b 1.10+00
[
(
4.40 1.126 4.60 1.125 l
)
\\)
r 4.80 1.122 l
5.00 1.120
- E 1.17+00 f
v 5.20 1.128 j
5.40 1.146
/
5.60 1.161 d
)
j 5.80 1.176 E 1.15+00
(
l 6.00 1.189 W
\\
f 6.20 1.198 E
\\
l 6.40 1.208 6.60 1.214
\\
l 1.13t00 6.80 1.221
\\
%/
7.00' 1.226 4
/
7.20 1.230 7.40 1.232 1.11+00 7.60 1.232 7.80 1.231 0.00+00 2.00+00 4.00+00 8.00+00 8.00+00 1.00+01 8.00 1.228 COREHEIGHT(FEET) 8.20 1.226 8.40 1.223 8.60 1.218 8.80 1.210 9.00 1.200 9.20 1.190 9.40 1.180 9.60 1.177 9.80 1.180 10.00 1.187 10.20 1.190
7 FIGW E 5 - N(Z) FUNCTION FOR N2C7 AT 2893 MW.
FROM 7000 to 9000 MWD /MTU BlRNUP
~
TOP A!O BOTTOM 15 PERCENT EXCLtDED AS PER TECH SPEC 4.2.2.2.G' i
HEIGHT
.N(Z)
(FEET) i l
1.80' 1.167.
d 2.00 1.155
'J 2.20' 1.147 I
2.40 1.138-2.60' 1.129 j
2.80 1.124 1
3.00 1.121 1.23+00 3.20 1.122 m
/'
N 3.40 1.119-
/
\\
3.60 1.119
/
\\
3.80 1.121:
1.21+00 4.00 1.124
[
4.20 1.126
,e 4.40-1.126
/
L 4.60 1.125 a
I 1.19400 f
\\
4.80 1.122 3
)
{I 5.00 1.120
=
5.20 1.128
[
V
=
5.40 1.146 E.1.17+00 5.60 1.161 E
f 5.80 1.176 C
'6.00 1.189 E
I f
6.20 1.198 g 1.15+00
('
6.40 1.208 E
k f-6.60 1.214 6.80 1.221 k
f 7.00 1.226 1.13+00 7.20 1.230 k
j 7.40 1.232 7.60 1.232 1*11+00 7.80 1.231 8.00 1.228 0.00+00 2.00+00 4.00+00 1.00+00 0.00+00 1.00+01 8.20 1.226 COREHEIGHT(FEET) 8.40 1.223 8.60 1.218 8.80 1.210 9.00 1.200 9.20 1.190 9.40 1.180 9.60 1.177 9.80 1.180 10.00 1.187 10.20 1.190 i
_D
4-FIG lRE 6 - K(Z) FUNCTION FOR N2C7 AT 2893 MW-1 FROM 9000 to 15200 MWD /MTU BtRNUP-TOP AIO BOTTOM 15 PERCENT EXCLlI)ED 3
AS PER TECH SPEC 4.2.2.2.G HEIGHT N(Z) l (FEET)~
'1.80 1.162 2.00 1.155 2.20 1.146.
2.40-1.138 2.60 1.129 l
2.80 1.125 1
3.00 1.121 3.20
'1.122 3.40 1.124 i
/
3.60 '
1.129 l
3.80 1.132 1*24+00 L
4.00
-1.135 4.20 1.136 4.40 1.135 en 4.60 1.135 5
4.80 1.135 t
5.00 1.142-C 5.20 1.158 g 1.20+00 5.40 1.180 5.60 1.197 E
/
5.80 1.209 E
/
6.00 1.220 m
v 6.20 1.228.-
d 6.40 1.235 8
6.60-1.241 W 1.15+00 6.80 1.248 E
h 7.00 1.253
\\
7.20 1.256
\\
7.40 1.256 y
7.60 1.254 7.80 1.251 i
8.00 1.245 1.12+00 8.20 1.237 8.40 1.228 0.00+00 2.00+00 4.00+00 1.00+00 1.00+00 1.00+01-8.60 1.219 COREHEIGHT(FEET) 8.80 1.210 j
9.00 1.199 l'
9.20 1.190 9.40 1.179 9.60 1.177 i
9.80 1.180
[
10.00 1.187 10.20 1.190 I
i
FIGlRE 7 - N(Z) FUNCTION FOR N2C7 AT 2893 MW FR(M 15200 MWD /MTU BlRNUP TO EOL TOP AM) BOTTOM 15 PERCENT EXCLlDED AS PER TECH SPEC 4.2.2.2.G.
HEIGHT N(Z)-
(FEET) 1.80 1.154 2.00 1.146 2.20 1.138 2.40 1.133 2.60 1.127 2.80 1.125 3.00 1.121
/
'3.20 1.121 1.24+00 i
3.40 1.124 3.60 1.129 3.80 1.132 5
4.00
'1.135 4.20 1.136 3
4.40 1.135 4.60 1.135 5 1.20+00 4.80 1.135 E
}
5.00 1.142
=E 5.20 1.158 E-(
5.40-1.180 3
V' 5.60 1.197 5.80 1.209 E;
6.00 l'.220
$1.1E+00 6.20 1.228 3
6.40 1.235 6.60 1.241 6.80 1.248
\\
7.00 1.253 d
7.20 1.256
[
7.40 1.256 1.12+00
/
7.60 1.254 7.80 1.251 O.00+00 2.00+00 4.00+00 6.00+00 0.00+00 1.00+01 8.00 1.245 COREHEIGHT(FEET) 8.20
. 1.238 8.40 1.228 8.60 1.216 i
8.80 1.204 i
9.00 1.189 9.20 1.180 9.40 1.174 9.60 1.175 9.80 1.177 10.00 1.182 10.20 1.184 i
F
?
.e
-4 FIGlRE 8 - AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER FROM 150 MWD /MTU BlRNUP TO EOC FOR NORTH A M UNIT 2 CYCLE 7 1.20402 1.00+02
(-12, 100)
(6,100)
/
\\
=
E l
\\
I.90401
/
\\ Unnecept able a.
[
\\
g
\\ Operat:,on j
Y
/
\\
[ 8.00+01
/
Acceptable
\\
/
\\
wg
/
01 eration j
, 0) 4.00401 Eu2
- 2.00+01 l
0.00400
-5.99+01
-3.00+01
-1.80+01 1.00+01 3.00+01 5:00+01 PERCENTFLUIDIFFERENCE(DELTA-1) l l
i
_ _ - - - _ _ _ _ - _ _ - _ _ _ _ _