ML20116J370
| ML20116J370 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 08/01/1996 |
| From: | NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | |
| Shared Package | |
| ML20116J369 | List: |
| References | |
| RE-21-01, RE-21-01-R01, RE-21-1, RE-21-1-R1, NUDOCS 9608130171 | |
| Download: ML20116J370 (21) | |
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RE-21 CORE OPERATING LIMITS REPORT CYCLE 5 COLR RE DEPT SUPERVISOR MN 8//[f6 OPERATIONS MANAGER d[e_
9//94 SIGNATURE NITE l
REVISION 01-05-03
!$8"*R865 ZI888h a P
RE-21 Rev. 01-05-03 Page 2 or21 i
1.0 Core Operating Limits Report l
l This Core Operating Limits Report for Seabrook Station Unit 1. Cycle 5 has bran prepared in accordance with the requirements of Technical Specification 6.8.1.6.
I The Technical Specifications affected by this report are:
1) 2.2.1 Limiting Safety System Settings 2) 3.1.1.1 Shutdown Margin Limit for MODES 1,2,3,4 3.1.1.2 Shutdown Margin Limit for MODE 5 l
3) 4)
3.1.1.3 Moderator Temperature Coefficient j
5) 3.1.3.5 Shutdown Rod Insertion Limit l
6) 3.1.3.6 Control Rod Insertion Limits f
I I
7) 3.2.1 Axial Flux Difference 8) 3.2.2 Heat Flux Hot Channel Factor j
9) 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor 1
l 2.0 Operating Limits The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the l
following subsections. These limits have been developed using the NRC-approved methodologies specified in Technical Specification 6.8.1.6.
l l
2.1 Limiting Safety System Settings: (Specification 2.2.1) l 2.1.1 Cycle Dependent Overtemperature AT Trip Setpoint Parameters and Function Modifier:
- 2. 1.1.1 K, = 1.145
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2.1.1.2 K = 0.020 / 'F 2
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2.1.1.3 K = 0.001/ psig 3
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RE-21 I
Rev. 01 05-03 2.1.1.4 Channel Total Allowance (TA) = N.A.
Page 3 of 21
}
2.1.1.5 Channel Z = N.A.
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2.1.1.6 Channel Sensor Error (S) = N.A.
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2.1.1.7 Allowable Value - De channel's manmum Trip Setpoint shall not exceed its computedj Setpoint by more than 2.2% of AT span (150 PU_AT).
i 2.1.1.8 F,(AI) is a function of the indicated difference between top and bottom detectors of th!
range neutron ion chambers with gains to be selected based on measured instrument resp during plant startup tests. F (AI) is specified in Figure 1.1.
2.1.2 Cycle Dependent Overpower AT Trip Setpolat Parameters and Function Modi 5er:
I 1
2.1.2.1 K. = 1.070 l
5 I
2'1.2.2 K, = 0.020 / 'F for increasing avenge temperature and K, = 0.0 for decreasing average j
temperature.
i 2.1.2.3 K = -0.00196 / 'F for T > T" and K. = 0.0 for T s T", where:
I T =. Average temperature ('F), and i
T" =
Indicated T,,, at RATED TrIERMAL POWER (Calibration i
temperature for ATinstrumentation s 588.5'F).
l 1
2.1.2.4 Channel Total Allowance (TA) = N.A.
I 2.1.2.5 Channel Z = N.A.
2.1.2.6 Channel Sensor Error (S) = N.A.
2.1.2.7 Allowable Value - De channel's maximum Trip Setpoint shall not exceed its computed Trip Setpoint by more than 2.1% of AT span (150 PU_.AT).
a
RE-21 Rev. 01 05-03 Page 4 of 21 2.1.2.8 F (AI) is a function of the indicated difference between top and bottom detectors of 2
the power-range neutron ion chambers with gains to be selected based on measured instmment response during plant startup tests. F (AI) is specified in Figure 1.2.
2 2.2 Shutdown Margin Limit For MODES 1,2,3, and 4: (Specification 3.1.1.1)
A)
The Shutdown Margin shall be greater than or equal to 1.3 % AK/K, in MODES 1, 2,3.
B)
The Shutdown Margin shall be greater than or equal to 1.8 % AK/K in MODE 4.
2.3 Shutdown Margin Limit For MODE 5: (Specification 3.1.1.2)
The Shutdown Margin shall be greater than or equal to 1.8 % AK/K.
2.4 Moderator Tynperature Coefficient: (Specification 3.1.1.3) 2.4.1 The Moderator Temperanus Coefficient (MTC) shall be less positive than +2.19 x 105 AK/K/"F for Beginning of Cycle Life (BOL), All Rods Out (ARO), Hot Zero Thermal Power conditions.
2.4.2 MTC shall be less negative than -4.2 x 10" AK/K/'F for End of Cycle Life (EOL), ARO, Rated Thermal Power conditions.
2.4.3 The 300 ppm ARO, Rated Thermal Power MTC shall be less negative than -3.3 x 10" AK/K/*F (300 ppm Surveillance Limit) 2.5 Shutdown Rod Insertion Limit: (Specification 3.1.3.5) 2.5.1 'Ibe shutdown rods shall be fully withdrawn. The fully withdrawn position is defined as the interval within 225 steps withdrawn to the medanical fully withdrawn position inclusive.
2.6 Control Rod Insertion Limits: (Specification 3.1.3.6) 2.6.1 The control rod banks shall'be limited in physical insertion as specified in Figure 2.
I RE-21 Rev. 01-05-03 Page 5 of 21 l
2.7 Axial Flux Difference: (Specification 3.2.1) 2.7.1 i
For operation with the Fixed Incore Detector Alarm OPERABLE, the indicated AF within the Acceptable Operation Limits specified in Figure 3.1.
2.7.2 For operation with the Fixed Incore Detector Alarm inoperable, the indicated AFD mu within the Acceptable Operation Limits specified in Figure 3.2.
i 2.8_ Heat Mur Hot Channel Factor: (Specification 3.2.2) 2.8.1 F"", = 2.50 j
2.8.2 For operation with the Fixed Incore Detector Alarm OPERABLE, the K(z) used surveillance requirements 4.2.2.2 and 4.2.2.4 is specified in Figure 4.1.
[
2.8.3 For operation with the Fixed Incore Detector Alarm inoperable, the K(z) used to s t
surveillance requirement 4.2.1.2 is specified in Figures 4.2,4.3,4.4, and 4.5.
I 2.9 Nuclear Enthalpy Rise Hot Channel Factor: (Specification 3.2.3)
The limits on F"tu are specified in Figure 5. The limits apply to F"4x measured using the fixed or movable incore detectors since a bounding measurement error has been allowed for in determination of the design DNBR limit value.
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SEABROOK STATION CYCLE 5 Axial Flux Imbalance CORE OPERATING LIMITS REPORT Penalty Function FIGURE 1.1
RE-21 Rev. OI-05-03 Page 7 of 21 150 I
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- Fully Withdrawn is defined as the All-Rods-Out position The control rod insertion limits have been revised to permit ARO repositioning between 225 and 231 steps withdrawn.
1 Rod Bank insertion Limits versus Thermal Power SEABROOK STATION CYCLE 5 Four-Loop Operation CORE OPERATING LIMITS REPORT FIGURE 2 i
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Axial Flux Difference Limits as a Function of Rated Thermal Power SEABROOK STATION CYCLE 5 for Operation With CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarm inoperable FIGURE 3.2
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2.2 2.1 Coordinates 0.00,2.5000 6.00,2.5000 12.00,2.3125 2.0 0
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F (Z) Limit As A Function of Core Height i
SEABROOK STATION CYCLE 5 f8r Operation with CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarrn OPERABLE FIGURE 4.1
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F (Z) Limit As A Function of Core Height o
for Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup < 3.0 GWD/Mtu FIGURE 4.2
RE-21 Rev. OI-05-03
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10 11 12 Core Height (Feet) i F (Z) Umit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Burnup 3.0 to 8.0 GWD/Mtu FIGURE 4.2A
RE-21 Rev. OI-05-03 Page 14 of 21 2.2 i
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F (Z) Limit As A Function of Core Height o
fdr Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable i
CORE OPERATING LIMITS REPORT and Cycle Average Bumup B.0 to 10.0 GWD/Mtu 1
FIGURE 4.3
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CORE OPERATING LIMITS REPORT and Cycle Average Bumup 10.0 to 12.0 GWD/Mtu FIGURE 4.3A
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F (Z) Limit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 12.0 to 14.0 GWD/Mtu FIGURE 4.3B
RE-21 Rev. OI-05-03 Page 17 of 21 2.2 g
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9 10 11 12 Core Height (Feet) i F (Z) Limit As A Function of Core Height 18r Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 14.0 to 16.0 GWD/Mtu FIGURE 4.4
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10 11 12 Core Height (Feet)
F (Z) Limit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 5 Fixed Incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 16.0 to 18.0 GWD/Mtu FIGURE 4.4A l
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9 10 11 12 Core Height (Feet)
F (Z) Limit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm Inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup >18.0 GWD/Mtu FIGURE 4.4B
RE-21 Rev. 01-05-03 Page 20 of 21 Height Exposures (GWD/MTU)
(Ft) 03 3-8 8-10 10-12 12 - 14 14 -16 16 18
> 18 0.2500 1.931
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.$.763 1.716 6.2500 1.917 2.002 1.947 1.892 1.836 1.797 1.759 1.720 6.7500 1.929 1.957 1.919 1.882 1.844 1.814 1.784 1.754 7.2500 1.950 1.944 1.921 1.898 1.875 1.856 1.837 1.819 7.7500 1.983 1.951 1.942 1.934 1.926 1.919 1.913 1.906 8.2500 1.959 1.950 1.950 1.960 1.970 1.980 1.983 1.985 8.7500 1.939 1.939 1.941 1.960 1.980 1.999 2.016 2.032 9.2500 1.927 1.927 1.935 1.963 1.991 2.019 2.048 2.077 i
9.7500 1.919 1.919 1.934 1.967 2.000 2.033 2.072 2.110 10.2500 1.914 1.914 1.933 1.968 2 004 2.040 2.083 2.126 10.7500 1.905 1.905 1.932 1.972 2.012 2.052 2.092 2.133 11.2500 1.890 1.890 1.923 1.966 2.008 2.050
~2.089 2.128 11.7500 1.856 1.856 1.890 1.937 1.985 2.032 2.058 2.083 Basis: FoRTP = 2.50 Coordinates for F (Z) Limit As A Function of Oore Height q
SEABROOK STATION CYCLE 5 for Operation with CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarm Inoperable FIGURE 4.5
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RE-21 Rev. OI-05-03 Page 21 of 21 1
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All-Rods-Out SEABROOK STATION CYCLE 5 Nuclear Enthalpy Rise Hot Channel Factor CORE OPERATING LIMITS REPORT Versus Power Level FIGURE 5