ML20197H378
| ML20197H378 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 12/10/1997 |
| From: | NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | |
| Shared Package | |
| ML20197H376 | List: |
| References | |
| RE-21-01, RE-21-1, RE-21-R02, RE-21-R2, NUDOCS 9712310264 | |
| Download: ML20197H378 (20) | |
Text
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1 RE-21 CORE OPERATING LIMITS REPORT CYCLE 6 COLR RE DEPT SUPERVISOR f.4/ k b Co m
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OPERATIONS MANAGER A wI d
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DATE REVISION 01-06-02 gg23g0ggggggg},3 p
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RE.31 Rev. 01402 Page 2 of 20 j
i l'.0 Cdre Operating Limits Report This Core Operating Limits Report for Seabrook Station Unit 1, Cycle 6 has been prepared in accordance with the requirements of Technical Specification 6.8.1.6.
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) 3.1.1.2 Shutdown Margin Limit for MODE 5 I
4) 3.1.1.3 Moderator Temperature Coefficient 5) 3.1.3.5 Shutdown Rod Insertion Limit '
6) 3.1.3.6 Control Rod Insertion Limits 7) 3.2.1 Axial Flux Difference 8) 3.2.2 Heat Flux Hot Channel Factor 9) 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor 2.0 Operating Limits The cycle specific parameter limits for the specifications listed in section 1.0 are presented in the following subsections. These limits have been developed using the NRC approved methodologies specified in Technical Specification 6.8.1.6.
2.1 Limiting Safety System Settings: (Specification 2.2.1) 2.1.1 Cycle Dependent Overtemperature AT Trip Setpoint Parameters and Function Modifier:
2.1.1.1 K, = 1.180
RS21--
Rev. 0106 02 Page 3 ef 20 -
2.'t.1.2
- K, = 0.024 / T 2.1.1.3 K = 0.0018 / psig 3
T = - Average temperature (T), and T" = Indicated T.,, at RATED THERMAL POWER (Calibration temperature for AT instrumentation s 588.5 T).
2.1.1.4
- Channel Total Allowance (TA) = N.A.
' 2.1.1.5 Channel Z = N.A.
. 2.1.1.6.
Channel Sensor Error (S) = N.A.
t 2.1.1.7 Allowable Value ' The charmel's ; maximum Trip Setpoint shall not exceed -
its computed Trip Setpoint by more than 2.6% of AT span.
2.1.1.8 F (AI) is a function of the indicated difference between top and bottom i
detectors of the power-range net. tron ion chambers with gains to be selected based un measured instrument response during plant startup tests.
F (AI) is specified in Figure 1.1.
i
.2.1.2 Cycle Dependent Overpower AT Trip Setpoint Parameters and Function Modifier:
- 2.1.2.1 Ki = 1.087 2.1.2.2-
.K
= 0.020 / T for increasing average temperature and K = 0.0 for 3
3 decreasing average temperature.
S I.
j RE.31 Rev. 0106 02 Page 4 of 20 2.1.2.3 K. = 0.00215 / 'F for T > T" and K. = 0.0 for T s T", where:
T=
Average temperature (*F), and T" = Indicated T.,, at RATED THERMAL POWER (Calibration temperature for AT instmmentation s 587.5 7).
i 2.1.2.4 Channel Total Allowance (TA) = N.A.
2.1.2.5 Channel Z = N.A.
2.1.2.6 Channel Sensor Error (S) = N.A.
t Allowable Value The channel's maximum Trip Setpoint shall not exceed 2.1.2.7 its computed Trip Setpoint by more than 2.6% of AT span.
2.1.2.8 F ( AI) is a function of the indicated difference bety.een top and bottom 2
detectors of me power. range neutron ion chambers with gains to be selected based on measured instrument response during plant startup tests.
F (AI) is specified in Figure 1.2.
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 1.9 % 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 1.9 % AK/K.
A
RE 21 Rev. OI o6.o2 Page 5 of 20 2.4 Mo'derator Temperature Coef11clent: (SpeciDcation 3.1.1.3) 2.4.1 The Moderator Ternperature CoefDelent (MTC) shall be less positive than +1.16 x 10.s A}UlO*F for Beginning of Cycle Life (DOL), All Rods Out (ARO), Hot Zero Thermal Pow.tr conditions.
d 2.4.2 MTC shall be less negative than -4.7 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 3.8 x 10d AK/K/*F (300 ppm Surveillance Limit) 2.5 Shutdown Rod Insertion Limit (Specification 3.1.3.5) 2.5.1 The shutdown rods shall be fully withdrawn. The fully withdrawn po:ition is defined as the interval within 225 steps withdrawn to the mechanical 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.
2.7 Axial Flux Difference: (Specification 3.2.1) 2.7.1 For operation with the Fixed Incore Detector Alarm OPERABLE, the indicated AFD must be 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 must be within the Acceptable Operation Limits specified in Figure 3.2.
RE.2i Rev. OI 06 02 Page 6 of 20 2J He t Flux Hot Channel Factors (Specification 3.2.2) -
2.8.1 F'", a 2.50 2.8.2 For operation with the Fixed Incore Detector Alarm OPERABLE, K(z) is specified in Figure 4.1,
' ~
2.8.3 For operation with the Fixed Incore Detector Alarm inoperable, K(z) is specified in Figures 4.2 4.8. -
2.9 Nuclear Enthalpy Rise Hot Channel Factors (Specification 3.2.3)
- lhe limits on F"an are specified in Lgure 5. The limits apply to F"an measured using either the fixed or movable incore detectors since a bounding measurement error has been allowed for in determination of the design DNBR limit value.
RE.3i Rev. OI 06 02 Page 7 of 20 150 Coordinates 140 ---
2.9, 0.0 130" 60.0,103.9 120-110 =
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10 20 30 40 50 60 Al Overtemperature ATTrip F,(at)
SEABROOK STATION CYCLE 6 Axial Flux Imba;ance CORE OPERATING LIMITS REPORT Penalty Function FIGURE 1,1 a
RE 31 Rev,0106 02 Page 8 of 20 4
I I I i Coordinates 140 60.0,124.8 130-26.0, 0.0
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SEABROOK STATION CYCLE 6 Axial Flux Imbalance CORE OPERATING LIMITS REPORT Penalty Function FIGURE 1.2
IG 21 Rev. 0106 02 Page 9 of 20 i
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.2 0.4 0.6 0.8 1.0 Fraction of Rated Thermal Power Bank A must be fully withdrawn' prior to power operation.
- 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.
Rod Bank Insertion Umits versus Thermal Power SEABROOK STATION CYCLE 6 Four Loop Operation CORE OPERATING LIMITS REPORT FIGURE 2
RE 3i Rev. OI 06412 Page 10 of 20 s
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Coordinates 110 - -
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Axial Flux Difference Limits as a Function of Rated Thermal Power SEABROOK STATION CYCLE 6 ior Operation With CORE OPERATING LIMITS REPORT Fixed inco.e Detector System Alarm OPERABLE FIGURE 3.1 7
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RE 31 Rev. 01064)2 Page 11 of 20 120 Coordinater 110 35.0, 50.0 13.0,100.0 100 8.0,100.0
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Axlal Flux Difference Limits as a Function of Rated Thermal Power SEABROOK STATION CYCLE 6 for Operation With CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarm inoperable FIGURE 3.2
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RE-21 Rm 0I 06-02 l
Page 12 of 20 2.6 t
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2.1 Coordinates 0.00,2.5000 6.00,2.5000 12.00,2.3125 2.0 0
1 2
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9 10 11 12 Core Height (Feet)
F (Z) Limit As A Function of Core Height 10r Operation with SEABROOK STATION CYCLE 6 Fixed incere Detector System Alarm OPEPABLE CORE OPERATING LIMITS REPORT
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FIGURE 4.1
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RE 31 Rev. OI 06 02 Page 13 of 20 2.2 s' %
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10 11 12 Core Height (Feet)
F (Z) Limit As A Function of Core Height n
fdr Operation with SEABROOK STATION CYCLE 6 Fixed Incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup < 3.0 GWD/Mtu l
FIGURE 4.2 l
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D F (Z) Limit As A Functon of Core Height o
idr Operation with SEABROOK STATION CYCLE 6 Fixed Incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 3.0 to 8.0 GWD/Mtil FIGURE 4.3
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.o RE 21 Rev. OI-06 02 Page 15 of 20 2.2 A
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10 11 12 Core Height (Feet) i F (Z) Limit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 6 Fixed incore Detector System Alarm Inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 8.0 to 12.0 GWD/Miu FIGURE 4.4 J
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F (Z) Umit As A Function of Core Height 18r Operation with SEABROOK STATION CYCLE 6 Fixed incore Detector Svstem Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 12.0 to 16.0 GWD/Mtu FIGURE 4.5
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9 10 11 12 Core Height (Feet)
F (Z) Limit As A Function of Core Height n
fdr Operation with SEABROOK STATION CYCLE 6 Fixed I r. ore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 16.0 to 20.0 GWD/Mtu FIGURE 4.6
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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 6 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup > 20.0 GWD/Mtu FIGURE 4.7
- i_
- RE 31-Rev. OI 06 01 -
-_ Page_19 of 20 K(Z) x F-Cycle Average Exposure Bands in Gw&MTU
- Height (feet)
-<3-3-8 8-12 12 16-20
>20 11.750-1.997 1.918 1.918 1.952 2.029 2.084 11.250 2.007-1.933.
1.933 1.964 1.995 2.052 10.750 2.026-
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1.978 1.990 2.046 10.250-2.047 1.968 1.968 1.982 1.982
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- 2.080 2.022 2.014 1.977 1.977
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'8.750 2.083 2.029 2.024 1.986 1.986 2.025 8.250-2.086 2.016-2.014 1.994 1.994 2.015 7.750 2.089 2.010-1.981-1.962 1.950 1.925 7.250 2.070 2.016 1.950 1.920 1.867 1.826~
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- 2.074 2.042-1.939-1.895 1.807 1.759-16.250 2.089-2.074 1.957 1.883 1.783 1.729 5.750 2.122-2.123 2.002 1.892 1.792 1.736 5.250'
-2.118 2.129 2.019 1.904 1.800 1.733 4.750 2.101 2.122 1.991 1.893 1.804 1.719 4.250 2.059 2.111 1.999-1.924 1.860 1.746 3.750
-2.040-2.090 2.044-2.006 1.967 1.835 3.250 2.039 2.060 2.124 2.125 2.097 1.977 2.750 2.043 2.043 2.079 2.079 2.092 2.100 2.250 2.002 2.002 2.032 2.032 2.043' 2.063 1.750 1.972 1.972 1.996 1.996 2.006 2.033 1.250-1.950 1.950-1.969
'1.969-1.980 2.006
-0.750-1.920 1.920 1.951 1.951 1.957 1.983 0.250 1.907 1.907_
1.934 1.934 1.937 1.964 Basis: F" = 2.30 a
Coordinates for F (Z) Limit As A Function of Core Height q
SEABROOK STATION CYCLE 6 for Operation with -
. CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarm inoperable FIGURE 4.8
e
. e, RE.21 Rev. 0106-02 Page 20 of 20 g
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All-Rods-Out SEABROOK STATION CYCLE 6 Nuclear Enthalpy Rise Hot Channel Factor CORE OPERATING LIMITS REPORT -
Versus Power Level FIGURE 5 i
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