ML20094D302

Rev 9 to Core Operating Limit Rept, Adding Figure, Axial Power Distribution LSSS for 4 Pump Operation

ML20094D302
Person / Time
Site:	Fort Calhoun
Issue date:	10/06/1995
From:	Weber W OMAHA PUBLIC POWER DISTRICT
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ML20094D291	List: LIC-95-0208, Forwards Rev 9 to Core Operating Limits Rept ML20094D302
References
NUDOCS 9511030264
Download: ML20094D302 (17)

Text

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Fort Calhoun Station Unit No. 1 l

i TDB-VI -

l TECHNICAL DATA BOOK PROCEDURE

Title:

CORE OPERATING LIMIT REPORT

)

FC-68 Number: 47372 Reason for Change: Add figure to COLR for " Axial Power Distribution LSSS for 4 Pump l Operation".

Contact Person: William O. Weber ISSUED: 10-06-95 4:00 pm R9 9511030264 951027 PDR ADOCK 05000285 p PDR

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, FORT CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 1 OF 16 l

Fort Calhoun Station, Unit 1 l J

Cycle 16 Core Onoratina Limits Renort l

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t 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 Production Engineering Division, Nuclear Engineering Department.

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, FORT CALHOUN STATION TDB-VI

, , , TECHNICAL DATA BOOK PROCEDURE PAGE 2 OF 16 TABLE OF CONTENTS 11gm Descriotion EADA 1,0 Introduction 5 2.0 Core Operating Umits 5 3.0 TM/LP Umit 6 4.0 Maximum Core inlet Temperatute 6 5,0 Power Dependent insertion Umit 7 6.0 Unear Heat Rate 7 7,0 Excore Monitoring of LHR 7 8.0 Peaking Factor (Fa T, FxyT) Umits 7 9,0 DNB Monitoring 7 10,0 T Fa,FxyT and Core Power Umitations 8 11.0 Refueling Boron Concentration 8 12,0 Axial Power Distribution S l

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, FORT CALHOUN STATION TDB-VI

. TECHNICAL DATA BOOK PROCEDURE PAGE 3 OF 16 LIST OF TABLES Table No. 3 Eggg 1 TM/LP Coefficients 6 2 Maximum Fn and Fxy Umits 7 I

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i I

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. FORT CALHOUN STATION TDB-VI

. TECHNICAL DATA BOOK PROCEDURE PAGE 4 OF 16 LIST OF FIGURES Figure No. IltlR EaQA 1 Thermal Margin / Low Pressure 4 Pump Operation 9 2 Power Dependent insertion Umit 10 3 Allowable Peak Unear Heat Rate vs. Bumup 11 4 Exco.e Monitoring of LHR 12 5 DNB Monitoring 13 6 BASSS Allowable Power 14 7 F RT. FxyT and Core Power Umitations 15 8 Axial Power Distribution LSSS for 4 Pump Operation 16 i

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FORT CALHOUN STATION TDB-VI l . . TECHNICAL DATA BOOK PROCEDURE PAGE 5 OF 16 l Cycle 16 Core Operating Limits Report ,

i 1.0 Introduction This report provides the cycle-specific limits for operation of the Fort Calhoun Station Unit 1 for Cycle 16 operation. It includes limits for:

1.) TM/LP LSSS 4 Pump Operation (PyAn) 2.) Core inlet Temperature (TIN) 3.) Power Dependent insertion Umit (PDIL)  ;

4.) Allowable Peak Unear Heat Rate 5.) Excore Monitoring of UIR T

6.) Planar Radial Peaking Factor (Fxy ) T 7.) Integrated Radial Peaking Factor (Fn )

8.) DNB Monitoring T

9.) F n /p ,yT versus Power Trade off curve 10.) Refueling Boron Concentration 11.) Axial Power Distribution l ,

These limits are applicable for the duration of Cycle 16. 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.

1 2.0 Core Operating Limits l

All values and limits in this TDB section apply to Cycle 16 operation. Cycle 16 must be operated within the bounds of these limits and all others specified in the Technical Specifications. This report l 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 Verificathn" Rev. 4, Dated December,1994. (TAC No, M89456)

OPPD-NA-8303," Reload Oore Analysis Methodology, Transient and Accident Methods and Verification", Rev. 04, Dated January 1993. (TAC No M85845)

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. FORT CALHOUN STATION TDB-VI

. , , TECHNICAL DATA BOOK PROCEDURE PAGE 6 OF 16 1 3.0 TM/LP Limit i

! The TM/LP coefficients for Cycle 16 are shown below:

Table 1 1 Coefficient he a 29.73 p 18.44 y -.11470 4

The TM/LP setpoint is calculated by the PVAR equation, shown below and in Figure 1:

PvAn = 29.73 PF(B) A1(Y)B + 18.44 TIN - 11470 l

PF(B) = 1.0 B2,100%

= -0.0088 + 1.8 50% < B < 100%

= 1.4 B.s,50%

A1(Y) = -0.3529Y1 + 1.0882 Y3 .s, 0.25 i

= 0.5714Y3 + 0.857 Y3 > 0.25 Where:

i B = High Auctioneered thermal (AT) or Nuclear Power, % of rated power l Y = Axial Shape index, asiu TIN = Core inlet Temperature, F PvAn = Reactor Coolant System Pressure, psia 4.0 Maximum Core inlet Temoerature The maximum core inlet temperature (Ti s) for Cycle 16 shall not exceed 545'F.

This limit is not applicable during either a thermal power ramp fr) axcess of 5% of rated thermal power per minute or a thermal power step greater than 10% of rated therrnal power.

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. FORT CALHOUN STATION TOB-VI

, . TECHNICAL DATA BOOK PROCEDURE PAGE 7 OF 16 5.0 Power Deoendent insertion Limit The power dependent insertion limit is defined in Figure 2 for Cycle 16 operation. i 6.0 1.lDRAf.finat Rate The allowable peak linear heat rate vs. burnup for Cycle 16 is 15.5 kW/ft. The allowable peak linear I heat rate for Cycle 16 is shown in Figure 3. '

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7.0 Excore Monitorino of LHR l The allowable operation for power versus axial shape Index for monitoring of LHR with excore 1 detectors for Cycle 16 is shown in Figure 4.

l 8.0 Peakina Factor Limits The Cycle 16 maximum full power values for the unrodded planar radial peaking factor (FxyT) and integrated radial peaking factor (FnT) are shown in Table 2.

Table 2 l

Maximum Full Power Fn and 3 F Limits I Peaking Factor Limita FnT 1,77 T

Fxy 1.86 9.0 DNB Monitoring The Cycle 16 limits for DNB as a function of axial shape index and core power is shown in Figure 5.

When the Better Axlal Shape Selection System is operable, during Cycle 16, the core power is limited as a function of the axial shape Index as shown in Figure 6. Figure 6 will eliminate the need for seperate LOCA and fuel performance limits to be maintained by the operators while operating with BASSS.

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i FORT CALHOUN STATION TDB-VI

• TEC,HNICAL DATA BOOK PROCEDURE PAGE 8 OF 16 10.0 F T. FyT and Core Power umitations Core power limitations versus FnT and FxyT are shown in Figure 7 for Cycle 16.

11.0 Refueling Baron Concentration The refueling boron concentration must be maintained with a boron concentration of at least 2000 ppm in the reactor coolant system to ensure a shutdown margin of not less than 5% with all CEAs withdrawn.

12.0 Axlal Power Distribution l

l 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 set point functions, i 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 for instrumentation inaccuracies and uncertainties associated with the excore symmetric offset - Incore axial peaking relationship, i l

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. FORT CALHOUN STATION TDB-VI l , , . TECHNICAL DATA BOOK PROCEDURE PAGE 9 OF 10 i

, 590 i

i ASl = -0.b6 580 Ld 570 q q 2400 psia W

n.

N I 2250 psia h 550 '

t a

Z qq N \

N 2100 psia

[  %

1 2 -

o 530 o ' N 1750 psia (I: 520  ;

O '

O -

510 i

500 '

60 70 80 90 100 110 120 CORE POWER (% OF RATED)

PvAn = 29.73PF(B)A1(Y)B + 16.44Tm - 11470 PF(B) = 1.0 B 2.100%

= .006B + 1.8 50%<B <100%

= 1.4 B A50%

A1(Y) = -0.3529Y i + 1.0882 Y s.25

= 0.5714Ye + 0.857 Yi >.25 CYCLE 16 THERMAL MARGIN / LOW PRESSURE FIGURE COLR 4 PUMP OPERATION 1 R9

. FORT CALHOUN STATION TDB-VI

, , TECHNICAL DATA BOOK PROCEDURE PAGE 10 OF 16

, - 126

- 100.8 LC NGTl!RM S7EAD" STA1 E .

INBERTIDN UMIT ,

- 75.6 ,

- 126 - 50.4 , HORT TEMM . h N

'INSERTIOtI LIM {, *

$ - 100.8 - 25 2 . l O

, PDll or TR4NSII NT

'. I ohm

- 75.6 -0 ,

g" l

c .. 7/

$ - 50.4 ,

EMERC ENCY BORATION UMIT psap*/ (12"llELOVfPDil - RE1!R TO AOF -3)  !

- 25.2 - 126 (u.2)

E en -0 - 100.8 E "

- 75.6 8' 8 b - 50.4 5

U .

- 126 - 25 2

- 100.8 - 0

- 75.6 8 - 50.4

- 25 2

-0 0 20 40 60 80 100 REACTOR POWER (% OF ALLOWED POWER)

CYCLE 16 POWER DEPENDENT INSERTION LIMIT FIGURE COLR 2 R9

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, FORT CALHOUN STATION TDB-VI

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• TECHNICAL DATA BOOK PROCEDURE PAGE 11 OF 10 18 UNACCEPTABLE OPERATION 16 15.5 KW/FT 14 A ::CEPTABLE OPERATION 12 A

10 t

E 8 .

g6 2

3 4 ,

o l 0 5000 10000 1s000 20000 BURNUP (MWD /MTU)

CYCLE 16 ALLOWABLE PEAK LINEAR HEAT RATE FIGURE COLR VS.BURNUP 3 R9

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. FORT CALHOUN STATION TDB-VI

, . TECHNICAL DATA BOOK PROCEDURE PAGE 12 OF 16 100

"*^' 1 8 90 ( .

E W # \

80 g ( .23 so) (.23,60)

O Q. , .

W 70 E

O O

g 60 -

W 0

,,a 50 J

4 E 40 O l F- l Z l W 30-O .

E W

Q. 20 10 -

l 0

.4 .2 0 .2 .4 1

AXlAL SHAPE INDEX (ASIU)

FIGURE CO R EXCORE MONITORING OF LHR R9

FORT CALHOUN STATION TDB-VI

, . . TECHNICAL DATA BOOK PROCEDURE PAGE 13 OF 16

. 1,10 l

100

• ' b' '

90

' / -

x l w 1 g 80 l

w 70 I .

k g (-o.2s os) (o.:ts,ss)

O 60  ;

O i W

g 50 I

9

-3 40 4

Lt.

O 30 Z

20

.h x

W CL 10 0

.4 .2 0 .2 .4 AXIAL SHAPE INDEX (ASIU)

NOTE: WHEN BASSS IS OPERABLE THIS FIGURE IS SUPERSCEDED BY FIGURE 6 - BASSS DNB ALLOWABLE POWER FIGURE .

COLlR DNS MONITORING R9

FORT CALHOUN STATION TDB-VI

, . " TECHNICAL DATA BOOK PROCEDURE PAGE 14 OF 10 1.10

( .12,m) (.12,100) 100 90 . i E

=

g 80 / \(

O n.

m 0 '

(-o.2s,es) )(0.2s,ss)

O 1 O 60 Q

W g 50 0J 3 40 4

u.

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>=

Z 20 a

W

n. 10 0

.4 .2 0 .2 .4 AXIAL SHAPE INDEX (ASIU)

CY COLR BASSS DNB ALLOWABLE POWER LCO 6

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' FORT CALHOUN STATION TDB-VI

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• TECHNICAL DATA BOOK PROCEDURE PAGE 15 OF 16 i

110 i

l l Fn T FnT l 3

100 l

3 i

! g (.s6,4 90

! uJ N N '

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N N

O 80 N w 1 Q.

W \

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O O 60 uJ 0J 50 J

• lC IL 40 0

> 30 Z

uJ 0

E 2d uJ G.

10 I i

0 1.75 1.80 1.85 1.00 1.95 2.00 2.05 2.10 :

PEAKING FACTOR 1

l CYCLE 16 FIGURE l COLR FnT, FxyT , and Core Power Limitations 7 R9 J

FORT CALHOUN STATION TDB-VI

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• TECHNIC'AL DATA BOOK PROCEDURE PAGE 16 OF 16 120 ,

(0.0,112) l

(~181")

g 100

1. ' ( 18:1M) j W

3 0 r , i j

W g 80 0

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W ( ( .3,65) (.3,65) l 3 60 O

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A l u.

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Z W l O

g 20

• W Q.

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.4 .2 0 .2 .4 l AXIAL SHAPE INDEX (ASIU) 1 l

l CYCLE 16 Axial Power Distribution LSSS FIGURE COLR for 4 Pump Operation 8 R9

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