ML20082M479

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Rev 7 to COLR, Revising Refueling Boron Concentration
ML20082M479
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 03/20/1995
From: Weber W
OMAHA PUBLIC POWER DISTRICT
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NUDOCS 9504240237
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,

Fort Calhoun Station Unit No. 1 TDB-VI TECHNICAL DATA BOOK PROCEDURE

Title:

CORE OPERATING LIMIT REPORT FC-68. Number: 46539 Reason for Change: Revise refueling boron concentration from 1900 ppm to 2000 ppm for Cycle 16 core.

Contact Person: William O. Weber ISSUED: 03-20-95 9:00 pm R7 9504240237 950419 PDR ADOCK 05000285 P PDR

9 FORT.CALHOUN STATION TDB-VI TECHNICAL DATA BOOK PAGE 1 OF 12 CYCLE 15 CORE OPERATING' 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 Production Engineering Division, N"Aar Engineering Department.

6 6

6 i

i i

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FORT CALHOUN STATION TDB-VI l TECHNICAL DATA BOOK PAGE 2 OF 12 )

TABLE OF CONTENTS ,

1.0 INTRODUCTION

. . . . . . . . . . . . . .- . . . . . . . . . . 3 2.0 CORE OPERATING LIMITS . . . . . . . . . . . . . . . . . . . . 3 3.0 TM/LP LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 1 TM/LP Coefficients . . . . . . . . . . . . . . . . . . . . . 4 j i

4.0 MAXIMUM CORE INLET TEMPERATURE .. . . . . . . . . . . . . . 4 l

5.0 POWER DEPENDENT INSERTION LIMIT . . . . . . . . . . . . . . . . 4 1

6.0 LINEAR HEAT RATE . . . . . . . . . . . . . . . . . . . . . . 4 7.0 EXCORE MONITORING OF LHR . . . . . . . . . . . . . . . . . . 4 8.0 PEAKING FACTOR LIMITS . . . . . . . . . . . . . . . . . . . . 5 1 Table 2 Maximum Full Power Fa and Fxy Limits . . . . . . . . . . . . . 5 9.0 DNB MONITORING . . . . . . . . . . . . . . . . . . . . . . . 5 10.0 Z,T, F Ty AND CORE POWER LIMITATIONS . . . . . . . . . . . . . 5 11.0 REFUELING BORON CONCENTRATION . . . . . . . . . . . . . . . . 5 l

Figure 1 Thermal Margin / Low Pressure 4 Pump Operation . . . . - 5 Figure 2 Power Dependent Insertion Limit . . . . . . . . . . . . 7 :

)

Figure 3 Allowable Peak Linear Heat Rate Vs. Burnup . . . . . . 8 Figure 4 Excore Monitoring of LHR . . . . . . . . . . . . . . . 9 Figure 5 DNB Monitoring . . . . . . . . . . . . . . . . . . . . 10 Figure 6 BASSS DNB Allowable Power LCO . . . . . . . . . . . . . 11 Figure 7 fat, F yT and Core Power Limitations . . . . . . . . . . 12 R7

' FORT CALHOUN STATION TDB-VI ,

TECHNICAL DATA BOOK- PAGE 3 OF 12 6

1.0 INTRODUCTION

This report provides the cycle - specific limits for operation of .

the Fort Calhoun Station Unit i for Cycle 15 operation. It includes limits for:

  • TM/LP LSSS 4 Pump Operation (Pua)
  • Core Inlet Temperature (T 2,) .
  • Power Dependent Insertion Limit (PDIL) '
  • Allowable Peak Linear Heat Rate
  • Excore Monitoring of LHR
  • Planar Radial Peaking Factor ( F,,T)
  • Integrated Radial Peaking Factor (fat)
  • fat /F,yT versus Power Trade Off Curve
  • Refueling Boron Concentration (Cycle 16)

These limits are applicable for the duration of Cycle 15. 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 setpcints or allowable increases in radial peaking factors.

2.0 CORE OPERATING LIMITS All values and limits in this TDB section apply to Cycle 15 operation. Cycle 15 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. 89455) ,

  • OPPD-NA-8302, " Reload Core Analysis Methodology, Neutronics Design Methods and Verification", Rev 4, Dated December, 1994 (TAC No. 89456)
  • OPPD-NA-8303, " Reload Core Analysis Methodology, Transient and Accident Methods and Verification", Rev 4, Dated January 1993 (TAC No. M85845)

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FORT CALHOUN STATION TDB-VI

-TECHNICAL DATA BOOK PAGE 4 OF 12 3.0 TM/LP LIMIT The TM/LP coefficients for Cycle 15 are shown below:

Table 1 ,

TM/LP Coefficients Coefficient Value a 29.73

$ 18.44 y -11360 The TM/LP setpoint is calculated by the Pwm equation, shown below and in Figure 1:

Pwm = 29.73 PF(B) A1(Y) B + 18.44Ta - 11360 PF(B) = 1.0 B2100%

= -0.008B + 1.8 50% < B<100%

= 1.4 BS50%

A1(Y) = -0.3529Y2 + 1.0882 Y3 s 0.25

= 0.5714Y3 + 0.857 Y3 > 0.25 Where:

B = High Auctioneered Thermal (AT) or Nuclear Power, % of rated power Y = Axial Shape Index, asiu Tw = Core Inlet Temperature, 'F Pwm = Reactor Coolant System Pressure, psia 4.0 MAXIMUM CORE INLET TEMPERATURE The maximum core inlet temperature (Tw) for Cycle 15 shall not exceed 543*F.

5.0 POWER DEPENDENT INSERTION LIMIT The power dependent insertion limit is defined in Figure 2 for Cycle 15 operation.

l 6.0 LINEAR HEAT RATE The allowable peak linear heat rate vs. burnup for Cycle 15 is  !

15.5 kW/ft. The allowable peak linear heat rate for Cycle 15 is shown in Figure 3.

i 7.0 EXCORE MONITORING OF LHR The allowable operation for power versus axial shape index for monitoring LHR with excore detectors for Cycle 15 is shown in Figure 4.

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FORT CALHOUN STATION TDB-VI '

TECHNICAL' DATA BOOK PAGE 5 OF 12 8.0 PEAKING FACTOR LIMITS The Cycle 15 maximum full power values for the unrodded planar radial peaking factor (FnT) and integrated radial peaking factor (FnT) are shown in Table 2.

Table 2 Maximum Full Power Fa and Fu Limits Peakina Factor Limits j fat 1.77 FnT 1.86 l

9.0 DNB MONITORING t

The Cycle 15 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 15, 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 separate LOCA and fuel performance limits to be maintained by the operators while operating with BASSS.

10.0 E.T,.. F yT AND CORE POWER LIMITATIONS Core power limitations versus fat and F yT are shown in Figure 7 for Cycle 15.

11.0 REFUELING BORON 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. l l

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FORT CALHOUN STATICN TB-VI TECHNICAL DATA BOOK PROCEDURE PAGE 7 CF 12

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

CYCLE 15 POWER DEPENDENT INSERTION LIMIT FIGURE COLR 2 Rev.7

FORT CALHOUN STATION EB-VI TECHNICAL DATA SOCK PROCEDURE PAGE 8 CF12 1

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UNACCEPTABLE OPERATION l

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0 O 5000 10000 15000 20000 BURNUP (MWD /MTU)

CYCLE 15 ALLOWABLE PEAK LINEAR HEAT RATE FIGURE COLR VS. BURNUP 3

FORT CALHOUN STATICN TB-VI TECHNICAL DATA BOOK FROCEDURE PAGE 9 OF12 100 ,

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AXIAL SHAPE INDEX (ASIU)

FIGURE COLR EXCORE MONITORING OF LHR 1 -__-

CRT CALHOUN STATICN DB-VI TECHNICAL DATA BOOK PROCEDURE PAGE10 CF 42 ,

l 110 1

( .079,100]

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

CYCLE 15 FIGURE COLR DNB MONITORING 5

Rev.7'

l FORT CALHOUN STATION TB-VI  ;

TECHNICAL DATA EOOK PROCEDURE PAGE11 OF 12 110

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CYCLE 15 FIGURE BASSS DNB ALLOWABLE POWER LCO 6 COLR gev. 7

ORT CALHOUN STATION 'u B -VI 7ECHNICAL DATA SCOK PROCEDURE PAGE12 OF 12 110 ,

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0 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 I

PEAKING FACTOR CYCLE 15 FIGURE COLR FaT, FxyT , and Core Power Limitations 7

'Rev. 7 1 l

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