ML20216E636
| ML20216E636 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 07/21/1999 |
| From: | Riva G OMAHA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML20216E634 | List: |
| References | |
| TDB-VI, TDB-VI-R18, NUDOCS 9909160004 | |
| Download: ML20216E636 (18) | |
Text
NT Fort Calhoun Station Unit No.1 TDB-VI TECHNICAL DATA BOOK
Title:
CORE OPERATING LIMIT REPORT l
l l
l i
l FC-68 Number: DCR 10856 Reason for Change: Revise fat, F T y maximum values and Figure 7, due to re-evaluation of Cycle 18 setpoints.
Initiator: G. M. Riva Preparer: G. M. Riva 9909160004 990908 DR ADOCK 0500 2 5 ISSUED: 07-21-99 3:00 pm R18
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 1 OF 17 Fort Calhoun Station, Unit 1 Cycle 18 Core Operatina Limits Report 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.
R18
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 2 OF 17 TABLE OF CONTENTS llam Descriotion Eage 1.0 Introduction 5 2.0 Core Operating Limits 5 3.0 TM/LP Umit 6 4.0 Maximum Core Inlat Temperature 6 5.0 Power Dependent insertion Umit 6 6.0 Unear Heat Rate 7 7.0 Excore Monitoring of LHR 7 8.0 Peaking Factor (F RT. FxyT) Umits 7 l
9.0 DNB Monitoring 7 10.0 T T 7 Fg,p,y and Core Power Umitations 11.0 Refueling Boron Concentration 8 12.0 Axial Power Distribution 8 l
l R18 L
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 3 OF 17 LIST OF TABLES Table No. Ilite Eaon 1 TM/LP Coefficients 6 3 l
4 2 Maximum F R and F nLimits 7 3 Refueling Boron Concentrations 8 l
l 1
R18
i I
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 4 OF 17 LIST OF FIGURES Figure No. Iltle Eage 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 7 T 15 Fn,FxyT and Core Power Limitations 8 Axial Power Distribution LSSS for 4 Pump 16 Operation 9 Axial Power Distribution Umits for 4 Pump 17
- Operation with incores Inoperable i
i R18
l FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 5 OF 17 Cycle 18 Core Operating Limits RepoA 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)
- Core inlet Temperature (TIN)
- Power Dependent insertion Limit (PDIL)
- Allowable Peak Linear Heat Rate
- Excore Monitoring of LHR Planar Radial Peaking Factor (FxyT)
- Inte0 rated Radial Peaking Factor (FR) I
- DNB Monitoring
- FnT/pyyT versus Power Trade-off Curve
- Refueling Boron Concentration j
- 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. ,
i 2.0 Core Opt. ating Limits l All values and limits in this TDB section apply to Cycle 18 operation. Cycle 18 must be operated 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)
- OPPD-NA-8302, " Reload Core Analysis Methodology, Neutronics Design Methods and Verification," Rev. 4, dated December 1994. (TAC No.
M89456)
- OPPD-NA-8303, " Reload Core Analysis Methodology, Transient and Accident Methods and Verification," Rev. 4, dated January 1993. (TAC No.
M85845)
R18
i FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 6 OF 17 3.0 TM/LP Limit The TM/LP coefficients for Cycle 18 are shown below:
Table 1 TM/LP Coefficients Coefficient Value a 29.73
$ 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%
= -0.008(B) + 1.8 for 50% < B < 100%
= 1.4 for B $ 50%
A1(Y) = -0.3529(Y 1) + 1.0882 for Y3 $ 0.25
= 0.5714(Y3 ) + 0.857 for Yi > 0.25 l Where:
B = High Auctioneered thermal (AT) or Nuclear Power, % of rated power Y = Axial Shape Index, aslu
- T i n = Core inlet Temperature, F PVAR = Reactor Coolant System Pressure, psia 4.0 Maximum Core Inlet Temperature The maximum core inlet temperature (T IN ) for CyCIO 18 shall not exceed 545' F. This value includes 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 power per minute or a thermal power step greater than 10% of rated thermal power.
5.0 Power Dependent insertion Limit The power dependent insertion limit is defined in Figure 2 for Cycle 18 operation.
R18
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.
8.0 Peaking Factor Limits T
The Cycle 18 maximum full power values for the unrodded planar radial peaking factor (Fn)and integrated radial peaking factor (FR T) are shown in Table 2.
Table 2 Maximum Full Power Fo and y F Limits Peaking Factor lJmil 7 1.650 Fa FnT 1.751 f l
9.0 DNB Monitoring The Cycle 18 limits for DNB as a function of axial shape index and core power is shown in Figure 5.
When the Better Axial Shape Selection System is operable during Cycle 18, the core power is limited as a function of the exlal shape index as shown in Figure 6. Figure 6 will eliminate the need l for separate LOCA and fuel performance limits to be maintained by the operators while operating l with BASSS.
10.0 F=T, p T and Core Power Limitations Core power limitations versus FnT and FnT are shown in Figure 7 for Cycle 18.
R18
I FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 8 OF 17 11.0 Refueling Boron Concentration 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.
Listed below in Table 3 are the refueling boron concentration values for Cycle 18 operations:
Table 3 Refueling Boron Concentrations Cycle 18 Average Burnup Refueling Boron Concentration (MWD /MTU) (ppm)
BOC 2,100 2.500 2,000 2.4,000 1,900 I l
12.0 Axial Power Distribution The axial power trip is provided to ensure that excessive axial peaking will not cause fuel damage.
The Axial Shape Indexis 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 '
malaistributions. Allowances have been made for instrumentation 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.
i i
R18
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 9 OF 17 590
~
ASI = -0.06 580 570
$ h \
tt m
560 x x x 2400 psia y 2250 psia 540 N
- p. 2100 psia 5
O 530 N
0 0 -
1750 psia 0 -
510 1
I I
500 ' ' ' '
l 60 70 80 90 100 110 120 ,
I CORE POWER (% OF RATED)
PVAR = 29.73PF(B)A1(Y)B + 18.44 TIN - 11380 PF(B) = 1.0 B .;>_100%
A1(Y) = -0.3529Y: + 1.0882 Y s.25
= .008B + 1.8 50%<B<100%
Yi >.25
= 0.5714Yi + 0.857
= 1.4 B $ 50%
CYCLE 18 THERMAL MARGIN / LOW PRESSURE FIGURE COLR FOR 4 PUMP OPERATION 1 R18
1 l
l FORT CALHOUN STATION TDB-VI ,
TECHNICAL DATA BOOK PROCEDURE PAGE 10 OF 17 I
- 126 LONG TERM STEADY STATE
- 100.8 INSERTION LIMIT ,-
~~
( * '5) y ,"
(94.5)
$ l ,- (82.5) o - 75.6 l ,
l SHORTTERM ,'
@ \
- 126 - 50.4
( INSERTION LIMIT l
,' ./
PPDIL z I ,
g I ,'
cc - 100.8 - 25.2 l
. i O l ,- PDIL or TRANSIENT l h 1 INSERTION LIMIT j " - 75.6 -0 1,
O ,
b '$ - 50.4 ,
E. ,'
EMERGENCY BORATION LIMIT I (35.2)' 12" BELOW PDIL - REFER TO AOP-3 E l:'/
5: 1 5 -0 - 100.8 l' O
O. !
0; E - 75.6 l 5
m 8 cc 0 0 - 50.4 6
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)
.- i CYCLE 18 POWER DEPENDENT INSERTION LIMIT FIGURE l COLR 2 R18
FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 11 OF 17 l l l UNACCEPTABLE OPERATION 16 15.5 KW/FT 14 ACCEPTABLE OPERATION 12 L
h 10 -
uJ D
E 8 k
E a
5 z i 3 1 4
0 1 0 5000 10000 15000 20000 BURNUP (MWD /MTU)
CYCLE 18 ALLOWABLE PEAK LINEAR HEAT RATE FIGURE COLR VS.BURNUP 3 R18
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 12 OF 17 l NOTE: Rodded operation is prohibited above 80% of Rated Thermal Power l 110 100 Rodded Operation 90 Prohibited E l l
W g (-0.08,82.5)
I I l
194miwA l (0.04,82.5) 3
(-0.112,80) N (0.075,80)
W E 70 ( _
8 o /
/ \\
g So
< x O
50
(-0.5,50) (0.5,50) 4 LL O 4o V
Z W
O 30 E
W Q.
20 10 0
- 0.6 - 0.4 - 0.2 0.0 0.2 0.4 0.6 AXIAL SHAPE INDEX (ASIU)
CY LE18 '
CO(p EXCORE MONITORING OF LHR R18
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 13 OF 17 110 (0.07,100) (0.15,100)
/
E / (0.26,88)
(-0.16,88)
O.
g 80 W
O O 70 g O
W g 60 O /
J d 50
}
4 LL O 40 (0.5,40) p (-0.5,40)
Z W
g 30 W
W ,
0- 20 l 1
10 0
-0.6 -0.4 - 0.2 0.0 0.2 0.4 0.6 AXIAL SHAPE INDEX (ASIU)
NOTE: WHEN BASSS IS OPERABLE, THIS FIGURE IS SUPERCEDED BY FIGURE 6 -
BASSS DNB ALLOWABLE POWER CYCLE 18 '
FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 14 OF 17 110 100 (-0.12,100) (0.15,100) e W
kI
\
$" 80
/ \
e / \
O / \
Q 70
~
Q / \
60
(., ) (0.5,64)
O J So
<C u
O 40 l-Z W 30 g
m W
4 20 10 0 l
- 0.6 - 0.4 - 0.2 0.0 0.2 0.4 0.6 AXIAL SHAPE INDEX (ASIU)
BASSS DNB ALLOWABLE POWER LCO 6 COLR R18
FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 15 OF 17 110 100 R .
FT n (1.65,100) \ (1.751,100)
\
\
90 - (1.65,90) 1
\ ,
i l E
m 80 \g 3 k(1.s8,78) \
70 -
\
E \3 (1.80,65)
O (1.80,65) s O
O 60 ~m s W
g s'l (1.92,55) 3l 50 l I
4 1
- 11. I O 40 i I
H l Z l W I O 30 E I i
W
- 2. 1 I
20 i l
l l
1 10 I
I I
O 1.65 1.70 1.75 1.80 1.85 1.95 2.00 2.05 PEAKING FACTOR CYCLE 18 T p T, AND CORE POWER LIMITATIONS FIGURE F R, W COLR 7 R18
FORT CALHOUN STATION TDB-Vi TECHNICAL DATA BOOK PROCEDURE PAGE 16 OF 17 120 (0,112) 110 A
/\ '
(-0.15,100) / Y (0.15,100)
,oo E Ki W g 3 **
\
O g 80 /( (-0.4,80) >\
(0.4,80)
O O
Q 70 W h Q 60
/[ \
_J I
50 (0.6,50)
LL, (-0.6,50)
O Z 40 uJ O
E 30 Lu a
20 10 O
- 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 COLR FOR 4 PUMP OPERATION 8 R18
FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 17 OF 17 120 APD LSSS 110
^ #
DNBR MONITORING j f (\
LIMIT /
g' N / /
B Q 90 Ys/ )\~
r KW/FT MONITORING a LIMIT 80 I /
3 0 j l Q 70 f g W K 3 /( \
Q 60 T (
J i 50 u.
O g, 40 m
O g 30 o.
20 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 LIMITS FOR 4 FIGURE COLR PUMP OPERATION WITH INCORES INOPERABLE 9 R18