ML20249C569
| ML20249C569 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 04/22/1998 |
| From: | Guinn M OMAHA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML20249C561 | List: |
| References | |
| TDB-VI, TDB-VI-R17, NUDOCS 9806300342 | |
| Download: ML20249C569 (18) | |
Text
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FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 1 OF 17 h . .
Fort Calhoun Station, Unit 1 Cycle 18 Core Operating' Limits Report l Due to the critical aspects of the safety analysis inputs contained in this report, changes may not be made to this report without concurrence of the Nuclear Engineering Department.
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9806300342 980626 FDR ADOCK 05000285 P PDR R17
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~ FORT CALHOUN STATION TDB-VI l TECHNICAL DATA BOOK PROCEDURE PAGE 2 OF 17 l
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TABLE OF CONTENTS l
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Description I llam EaQQ l 1,0 Introduction 5 2.0 Core Operating Umits 5 ,
!- 3.0 TM/LP Limit 6 L {
I 4.0 Maximum Core inlet Temperature 6 5.0 Power Dependent insertion Limit 6 6.0 Lin.2 Heat Rate 7 l
5 7.0 Excore Monitoring of LHR 7 I r
8.0 Peaking Factor (FaT, pmT) Limits 7 DNB Monitoring 9.0 7 10.0 FR,Tp ,yT and Core Power Limitations 7 l l
11.0 Refueling Boron Concentration 8 12.0 Axial Power Distribution 8 l
l l
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_.__ __ _- .___-.__m___________m__. _ . _ . _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _
- FORT CALHOUN STATION TDB-VI
' TECHNICAL DATA BOOK PROCEDURE PAGE 3 OF 17 a . .
LIST OF TABLES l
l Table No. Iit{g ESQQ 1 TM/LP Coefficients 6 2 Maximum Fa and F w Umits 7
. 3- Refueling Boron Concentrations 8
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FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 4 OF 17 LIST OF FIGURES Figure No. Illie Eaga 1 Thermal Margin / Low Pressure for 4 Pump 9 Operation 2 Power Dependent insertion Limit 10 3 Allowable Peak Linear Heat Rate vs. Burnup 11 4 Excore Monitoring of LHR 12 5 DNB Monitoring 13 6 BASSS Allowable Power 14 O 7 en'. e x'ene Core eower Limitations 45 8 Axial Power Distribution LSSS for 4 Pump 16 Operation _
9 Axial Power Distribution Limits for 4 Pump 17 Operation with incores inoperable me O
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FORT CALHOUN STATION TDB-Vi
. TECHNICAL DATA BOOK PROCEDURE PAGE 5 OF 17 .
I
{
Cycle 18 Core Operating Limits Report l l
.1.0 Introduction This report provides the cycle-specific limits for operation of the Fort Calhoun Station Unit 1 for Cycle 18 operation, it includes limits for:
- TM/LP LSSS for 4 Pump Operation (PVAR)
- ' CoreinletTemperature (TIN)
- ~ Power Dependent insertion Limit (PDIL)
- Allowable Peak Linear Heat Rate '
- ' Excore Monitoring of LHR
= T Pisnar Radial Peaking Factor (Fy)
- Integrated Radial Peaking Factor (FnT)
- DNB Monitoring
- FRT/pmTversus Power Trade-off Curve
.O.v
- Refueling Boron Concentration
- . Axial Power Distribution These limits are applicable for the duration of Cycle 18. For subsequent cycles the limits will be reviewed and revised as necessary. In addition, this report includes a number of cycle-specific
- coefficients used in the generation of certain reactor protective system trip setpoints or allowable
. increases in radial peaking factors.
2.0 Core Onoratina Limitt All values and limits in this TDB section apply to Cycle 18 operation. Cycle 18 must be operated l within the bounds of these limits and all others specified in the Technical Specifications. This report has been prepared in accordance with.the requirements of Technical Specification 5.9.5. The values and limits presented within this TDB section have been derived using the NRC approved
- methodologies listed below:
- OPPD-NA-8301, " Reload Core Analysis Methodology Overview," Rev. 6, dated December 1994. (TAC No, M89455)
I
- OPPD-NA-8302, " Reload- Core Analysis Methodology, Neutronics Design Methods and Verification," Rev. 4, dated December 1994. (TAC No.
- M89456)
{' M85845) '
l l
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FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 6 OF 17 O} .
3.0 TM/LP Liml]
The TM/LP coefficients for Cycle 18 are shown below: l Table 1 TM/LP Coefficient l Coefficient Value a 29.73 I 18.44 y -11380 The TM!LP setpoint is calculated by the PVAR equation, shown below and in Figure 1:
PVAR = 29.73 PF(B) A1(Y)B + 18.44Ti n - 11380 PF(B) . = 1.0 for B 2100% i
= -0.008(B) + 1.8 for 50% < B < 100%
= 1.4 for B s 50%
A1(Y) = -0.3529(Y 1) + 1.0882 for Y3 $ 0.25
= 0.5714(Y1 ) + 0.857 for Y3 > 0.25 Where:
B = High Auctioneered thermal (AT) or Nuclear Power, % of rated power Y = Axial Shape Index, asiu TtN = Core inlet Temperature, 'F j PVAR = Reactor Coolant System Pressure, psia i
4.0 Maximum Core Inist Temperature The maximum core inlet temperature (Ti n) for Cycle 18 shall not exceed 545'F. This Value includes l instrumentation uncertainty ofi2*F (Ref: FCS Calculation FC06292,6/9/95).
This limit is not applicable during either a thermal power ramp in excess of 5% of rated thermal .
l power per minute or a thermal power step greater than 10% of rated thermal power. l l
s 5.0 Power Dependent insertion Limit j The power dependent insertion limit is defined in Figure 2 for Cycle 18 operation. l I
R17 1
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FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 7 OF 17 6.0 Linear Heat Rate The allowable peak linear heat rate vs. burnup for Cycle 18 is 15.5 kW/ft. The allowable peak linear heat rate for Cycle 18 is shown in Figure 3.
7.0 Excore Monitoring of LHR The allowable operation for power versus axial shape index for monitoring of LHR with excore detectors for Cycle 18 is shown in Figure 4. l 8.0 Peaking Factor Limits The Cycle 18 maximum full power values for the unrodded planar radial peaking factor (FxyT ) and l Integrated redial peaking factor (FRT) are shown in Table 2.
Table 2 Maximum Full Power Fo and F y Limits ,
I Peakina Factor 1.imit T 1.768 f Fn
( Fxy T -
1.876 9.0 DNB Monitoring The Cycle 18 limits for DNB as a function of axial shape index and core power is shown in Figure l S.
When the Better Axial Shape Selection System is operable during Cycle 18, the core power is l l' limited as a function of the axial shape lndex as shown in Figure 6. Figure 6 will eliminate the need for separate LOCA and fuel performance limits to be maintained by the operators while operating '
with BASSS.
10h.foT. Fg T and Core Power LimitatlQna l Core power limitations versus FRT and FxyT are shown in Figure 7 for Cycle 18. l l
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l-FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 8 OF 17 L' 11.0 Refueling Boron Concentration I~ The refueling boron concentration is required to ensure a shutdown margin of not less than 5%
with all CEAs withdrawn._ The refueling boron concentration must be at least 1,900 ppm through the end of Cycle 17 operation and is valid until the beginning of core reload for Cycle 18.
l . Listed below in Table 3 are the refueling boron concentration values for Cycle 18 operations: l Table 3 Refueling Boron Concentrations JCycle 18 Average Burnup Refueling Boron Concentration (MWD /MTU) (com) .
BOC. 2,100 1 500 2,000 1 4,000 1,900 I
I O 12 o Axiai ao or Di trib iion The axial power trip is provided to ensure that excessive axial peaking will not cause fuel damage.
The Axial Shape Index is determined from the axially split excore detectors. The setpoint functions, shown in Figure 8 ensure that neither a DNBR of less than 1.18 nor a maximum linear heat rate
- of more than 22 kW/ft (deposited in the fuel) will exist as a consequence of axial power maldistributions. Allowances have been made forinstrumentation inaccuracies and uncertainties associated with the excore symmetric offset - Incore axial peaking relationship. Figure 9 combines the LHR LCO tent from Figure 4, the DNB LCO tent from Figure 5, and the APD LSSS tent from Figure 8 into one figure for a visual comparison of the different limits.
t j
LO l R17
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FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 9 OF 17 j o 590
~
ASI = -0.06 580 i
W 570 N, 3 560 W \ \ \ '2400 psia l
p 550 y 2250 psia i Z
~ 540 p N ' 2100 psia Z -
530 -
O -
1750 psia 0 -
510
)
500 ' ' "-
60 70 80 90 100 110 120 i
CORE POWER (% OF RATED)
- PVAR = 29.73PF(B)A1(Y)B + 18.44Tn, i .11380 PF(B) = 1.0 B 2 100%
l A1(Y) = -0.3529Y: + 1.0882 Yi s.25
= .008B + 1.8 50%< B<100%
= 0.5714Y + 0.857 Yi >.25
= 1.4 B s50%
CYCLE 18 THERMAL MARGIN / LOW PRESSURE FIGURE COLR' FOR 4 PUMP OPERATION 1 R17 l-
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 10 OF 17
- 126 l l ] l l LONG TERM STEADY STATE l
- 100.8 INSERTION LIMIT ,
~~~
I' " S)
(94.5)
$ l ,'
(82.5) o - 75.6 [ ,
$ l SHORTTERM ,
\
l INSERTION LIMIT .
- 126 - 50.4 F ,
,' /, PPDIL z l ,
e'
> l '
a' I - 100.8 - 25.2 l .
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l PDIL or TRANSIENT h q l ,
/, e ' INSERTION LIMIT 3: - 75.6 -O -
r,,' -
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h o a'
$ - 50.4 ,
- ,- EMERGENCY BORATION LIMIT 05.2) g 12" BELOW PDil- REFER TO AOP-3 Z - 25.2 - 126 (25.2)
O (13.2) J H j E -0 - 100.8 O 1
- 75.6 O o 0 5 - 50.4 g __
U - 126 - 25.2
- 100.8 - 0
{ - 75.6 8
b - 50.4
- 25.2
-0 0 20 40 60 80 100 REACTOR POWER (% OF ALLOWED POWER) _
lO CYCLE 18 POWER DEPENDENT INSERTION LIMIT FIGURE l COLR 2 R17
_ _ _ _ _ _ _ _ __ - _ _ __ _ _ _ _ _ _ - _ __ ____= _
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 11 OF 17 O -
8 l l UNACCEPTABLE OPERATION 16 15.5 KW/FT 14 ACCEPTABLE OPERATION 12 L
10 h_
O = 0 B
I km 6 1
b a
4 1
0 0 5000 10000 15000 20000 BURNUP (MWD /MTU)
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CYCLE 18 ALLOWABLE PEAK LINEAR HEAT RATE FIGURE l COLR VS.BURNUP- 3 R17
l NOTE: Rodded operation is prohibited above 80% of Rated Thermal Power l 0 -
110 100 Rodded Operation 90 Prohibited W !
g (-0.08,82.5) i I ;M E
/I (0.04,82.5)
I 80
(-0.112,80) T (0.075,80)
W /
E 70 '
O /
O (
0 W 60 e ! (- 0.5,50)
N (0.5,50) lL 40 W
Z W
O 30 m
W g . . .
20 10 0
- 0.6 - 0.4 - 0.2 0.0 0.2 0.4 0.6
$ AXIAL SHAPE INDEX (ASIU)
OLR EXCORE MONITORING OF LHR 4
1 ""
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 13 OF 17 h . 110 (0.07,100) (0.15,100) 100 5 *
(-0.16,88)
/ \
(0.28,88) 0- )
g 80 K
O Q 70 g e /
g 60 1 o
' l j 50
)
LL.
40 g (-0.5,40) (0.5,40)
Z uI 30 g
E IM 1 20 10
-0.6 -0.4 - 0.2 0.0 0.2 0.4 0.6 AXIAL SHAPE INDEX (ASIU) l NOTE: WHEN BASSS IS OPERABLE, THIS FIGURE IS SUPERCEDED BY FIGURE 6 -
g BASSS DNB ALLOWABLE POWER CYCLE 18 '
5 R17
O - uo l 100 (-0.12,100)
N(0.15,1m) l C W s/ \
1 /
/ \
\
e" O /
/ \
\
Q 70 7
O / \
60 ~ ('
O
._J J so u.
O O 40 l-Z W 30 g
m W
0- 20 10 0
- 0.6 - 0.4 - 0.2 0.0 0.2 0.4 0.6 AXIAL SHAPE INDEX (ASIU)
O COLR BASSS DNB ALLOWABLE POWER LCO 6
R17
FORT CALHOUN STATION TDB-VI ,
TECHNICAL DATA BOOK PROCEDURE PAGE 15 OF 17 110 {
i O .
T I Fn 100 FxY (1.768,100) \ (1.876,100) l
\ !
\
90 -
- (1.768,90) \
\ ,
h L
E \
ui 80 (1.80,78) i j 3
\ .
E '
El 70
- N \
E Kg (1.93,65)
O (1.929,65) 's s o 60 s s i
h .'%sQ2.06,55) 3 1 3 3 a 50 l 1
- l -
Os <:( l u, I ;
O 40 l F l 'i Z i i i!
LLI !
' i U. 30 i !
E i i
al !
- n. i
, i 20 _ _
l l
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l 10 I
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1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 PEAKING FACTOR O
CYCLE 18 F RT, pyyT, AND CORE POWER LIMITATIONS FIGURE COLR 7 R17 A.
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 16 OF 17
(
120 (o,112) 110 ^
/\
/ \ (o.1s,100) g 100 (-o.15,100)/
I
\
i 90 g
/ \
Q 3 c.
uJ g 80 - (-o.4,80) (0.4,80)
O l 0 Q 70 l LU l 5 l \
Q 60 l 1
O a 5
, u (-0.6,50) (0.6,50)
O _
l- l--
g, 40 I uJ O
E 30 Lu J I
D. 1 20 l
10
, 0
-0.8 - 0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 -
AXIAL SHAPE INDEX (ASIU)
CYCLE 18 AXIAL POWER DISTRIBUTION LSSS FIGURE i COLR FOR 4 PUMP OPERATION 8 R17
.g-
^
!- FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 17 OF 17 120 APD LSSS 110
^ /
DNBR MONITORING j
[
LIMIT I l E s /
l /)
. 5 Q 90 Y
r s N 3 KW/FT g MONITORING LIMIT Lu 80 ) >
E j 3 O
U 7 r
)f ?
j/
@ K 1
Q 60
,/
\
T
)\
_J
[
50 LL.
l O H
g 40 Lu O
E 30 Lu D.
20 10 0
- 0.8 - 0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 l
l- AXIAL SHAPE INDEX (ASIU) l O l CYCLE 18 AXIAL POWER DISTRIBUTION LIMITS FOR 4 FIGURE l
COLR PUMP OPERATION WITH INCORES INOPERABLE 9 R17 u