ML20129A863
| ML20129A863 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 10/10/1996 |
| From: | DUQUESNE LIGHT CO. |
| To: | |
| Shared Package | |
| ML20129A849 | List: |
| References | |
| NUDOCS 9610220260 | |
| Download: ML20129A863 (6) | |
Text
- -
l NPF-73 BEAVER VALLEY UNIT 2 CYCLE 7 l
CORE OPERATING LIMITS REPORT l
1 This Core Operating Limits Report provides the cycle specific parameter limits developed in accordance with the NRC approved methodologies specified in Technical Specification Administrative l
Cont--l 6.9.1.12.
Snecification 3.1.3.5 Shutdown Rod Insertion Limits The shutdown rods shall be withdrawn to at least 225 steps.
Soecification 3.1.3.6 Control Rod Insertion Limits Control Banks A and B shall be withdrawn to at least 225 steps.
' Control Banks C and D shall be limited in physical insertion as shown in Figure 1.
Soecification 3.2.1 Axial Flux Difference NOTE:
The target band is 17% about the target flux from 0% to 100% RATED THERMAL POWER.
The indicated Axial Flux Difference:
a.
Above 90% RATED THERMAL POWER shall be maintained within the 17% target band about the target flux difference.
b.
Between 50% and 90% RATED THERMAL POWER is within the limits shown on Figure 2.
c.
Below 50% RATED THERMAL POWER may deviate outside the l
target band.
Specification 3.2.2 Fg(Z) and Fxy Limits Fg(Z)$C.EQ*K(Z) for P > 0.5 1
P Fg(Z) 1 SEQ
- K(Z) for P $ 0.5
0.5 Where
CFQ = 2.40 P=
THERMAL POWER RATED THERMAL POWER K(Z) = the function obtained from Figure 3.
BEAVER VALLEY - UNIT 2 1 OF 6 COLR 7 l
9610220260 961010 r
PDR ADOCK 05000412 P
4 NPF-73 4
The F limits (Fxy(L)] for RATED THERMAL POWER within specific corep[anesshallbe:
Fxy(L)
= Fxy(RTP)
(1 + PFXY * (1-P))
Where:
For all core planes containing D-BANK:
Fxy(RTP) $ 1.71 i
For unrodded core planes:
elevation Fxy(RTP) $ 1.75 from 1.8 f t. elevation to 5.7 f t.
Fxy(RTP) $ 1.81 from 5.7 ft. elevation to 8.7 ft. elevation Fxy(RTP) $ 1.77 from 8.7 ft. elevation to 9.7 ft. elevation elevation Fxy(RTP) $ 1.72 from 9.7 f t. elevation to 10.2 f t.
PFXY = 0.2 P=
THERMAL POWER RATED THERMAL POWER Figure 4 provides the maximum total peaking factor times relative power (Fg *Prel) as a function of axial core height during normal T
core operation.
Specification 3.2.3 FNDH FNDH $ CFDH *(1 + PFDH *(1-P))
I Where:
CFDH = 1.62 PFDH = 0.3 P=
THERMAL POWER l
RATED THERMAL POWER 4
1 BEAVER VALLEY - UNIT 2 2'OF 6 COLR 7 l
NPF-73 220
[ j 54.53,225 i I
200 f
l100,187 g
3: 180 f
BANK C j
160 f
/
E 140
/
l z 120 7 p f l 0,114 l BANK D,/
100 Q-
/
W 60 O
U~
40 20 8, 0 l
\\
o 0
10 20 30 40 50 60 70 80 90 100 RELATIVE POWER (Percent)
FIGURE 1 CONTROL ROD INSERTION LIMITS AS A FUNCTION OF POWER LEVEL BEAVER VALLEY - UNIT 2 3 of 6 COLR 7 I
j NPF-73 100
-11, 90 11,90 UNACCEPTABLE ~
l E
UNACCEPTABLE
~
OPERATION
/
\\
OPERATION 2*
/
\\
g
/
\\
/
c 70 60 b
ACCEPTABLE OPERATION 50
'i
-31, 50 31,50 u.
0 40
$ 30 l
51 20 10 0
-50
-40
-30
-20
-10 0
10 20 30 40 50 FLUX DIFFERENCE (AI) %
FIGURE 2 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER l
BEAVER VALLEY - UNIT 2 4 of 6 COLR 7 l
NPF-73 1.2 0,1.00 6,1.00 1.0 12.0,.925
~
.80 8.60 g
.40
.20 0.00 0
2 4
6 8
10 12 CORE HE!GHT (Feet)
FIGURE 3 FdNORMALIZED OPERATING ENVELOPE, K(Z)
BEAVER VALLEY - UNIT 2 5 of 6 COLR 7 I
NPF-73 I
I 0.0,2.40 6.0,2.40
[ Sin,MXfM@ff M92%
12.0,2.22 M p'%
WMfCE)(y f_\\
'-fl #
/
2.2 g
i
^
^
2.0 o
n 1.8 g
d b-A ct 6 i
o
+
H O '4 l
2 1.2 D
E BASIS FXY
~
FROM 1.8 FT. TO 5.7 FT. s 1.75
.80 M ABOVE 5.7 FT. TO 8.7 FT. s 1.81 4
ABOVE 8.7 FT. TO 9.7 FT. s 1.77 ABOVE 9.7 F. TO 10.2 R. s 1.72
.60 b A
.40
/k A
.20 0
0 2
4 6
8 10 12 CORE HEIGHT (Feet)
FIGURE 4 MAXIMUM (Fd* PREL)
AL CORE HEIGHT DURING NORMAL CORE OPERATION BEAVER VALLEY - UNIT 2 6 of 6 COLR 7
.