ML20245L003
| ML20245L003 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 04/28/1989 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20245K992 | List: |
| References | |
| NUDOCS 8905050232 | |
| Download: ML20245L003 (5) | |
Text
._
e:
WESTINGHOUSE PROPRIETARY CIASS 3 I
I ATTACHMENT 1 Millstone Unit 3. Cycle 3 Radial Peaking Factor Limit Reports for Four Loop and Three Loop Operation 8905050232 890428 PDR ADOCK 05400423 P
@C
WESTINGHOUSE PROPRIETARY CIASS 3 Radial Peaking Factor Limit Report Four Loop Operation This Radial' Peaking Factor Limit Recort is provided in accordance with Paragraph 6.9.1.6 of the Millstone Unit 3 Nuclear Plant Technical Specifications.
4 The four loop operation F limits for RATED THERMAL POWER within specific core planes for Cycle 3 shall be:
1.
F less than or equal to 1.79 for all core planes containing xy Bank "D" control rods, and 2.
F less than or equal to 1.67 for all unrodded core planes.
These F (z) limits were used to confirm that the heat flux hot channel factor F (z) will be limited to the Technical Specification q
values of:
F (z) 5 [ p ] [K(z)] for P > 0.5 and, q
F (z) $ [4.64] [K(z)] for PS 0.5 q
assuming that most limiting axial power distributions expected to result from the insertion and removal or Control Banks B, C and D during operation, including the accompanying variations in the axial xenon and power distributions as described in the " Power Distribution Control and Load Following Procedures", WCAP-8403, September, 1974.
Therefore, these F limits provide assurance that the initial conditions assumed in the LOCA analysis are met, along with the ECCS acceptance criteria of 10CFR50.46.
See Figure 1 for a plot of [F
.PRel) versus Axial Core Height.
2.50 i
0.0. 2.32 l 6.0.2.32l 1
I I
I 10.8. 2.18l
~
~
,v,
l 2.25 7
,1
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+
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' +
4
+
8
+
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+
W Q:1.75
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Q-
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i r\\
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+
1.50 H
l12.0, 1.50 o
i w
U i
X 1.25 4
':E 1.00 +
.750
.500 0
2 4
6 8
10 12 COREHEIGHT(FEET)
Toe Bonou FIGURE 1 MAXIMUM FQT. pREL VERSUS AXIAL CORE HEIGHT DURING NORMAL CORE 4 LOOP OPERATION
WESTINGHOUSE PROPRIETARY CLASS 3 Radial Peaking Factor Limit Report Three Loop Operation This Radial Peaking Factor Limit Report is provided in accordance with Paragraph 6.9.1.6 of the Millstone Unit 3 Nuclear Plant Tectaical Specifications.
The three loop operation F ' limits for 65% of RATED THERMAL POWER xy within specific core planes for Cycle 3 shall be:
1.
F less than or equal to 1.64 for all core planes containing Bank "D" control rods, and 2.
F.65 RTP less than or equal to 1.53 for all unrodded core O
xy planes.
3.
In the relationship for F the multiplier M is equal to 0.312.
These F (z) limits were used to confirm that the heat flux hot channel factor F (z) will be limited to the Technical Specification q
values of:
F (z) 5 [ p ') [K(z)] for 0.65 > P > 0.325 and, q
F (z) 5 [5.20] [K(z)] for P $ 0.325 q
assuming that most limiting axial power distributions expected to j
I l
l result from the insertion and removal of Control Banks B, C and D during operation, including the accompanying variations in the axial xenon and power distributions as described in the " Power Distribution Control and Load Following Procedures", WCAP-8403, September, 1974.
f Therefore, these F limits provide assurance that the initial l
xy
(
conditions assumed in the IDCA analysis are met, along with the ECCS l
acceptance criteria of'10CFR50.46.
See Figure 2 for a plot of [F
.PRel) versus Axial Core Height.
t'*,, "
2.00 i
l l
1.75 0.0, 1.690l 6.0. 1.6901
.its,
y g
10.8,1.589l
~^
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m
_ 1.50
- , ++
LtJ
+
4
,+ ++*
+
.+
t f* +,
t+"
p
+ +,
,,, + ++++
r i,
+
1.25
,1 g
4 O
r Lt_
+
^
v s
y
< 1~00 si 2
l12.0,0.975 s
4 s
.750 C
l
.500 0
2 4
6 8
10 12 COREHEIGHT(FEET)
FIGURE 2 MAXIMUM FqT pRg VERSUS AXIAL CORE HEIGHT DURING NORMAL CORE 3 LOOP OPERATION i}